CN114089427A

CN114089427A - Microwave detection device for improving detection reliability of human body

Info

Publication number: CN114089427A
Application number: CN202111387018.8A
Authority: CN
Inventors: 邹高迪; 邹明志; 邹亮
Original assignee: Shenzhen Merrytek Technology Co Ltd
Current assignee: Shenzhen Merrytek Technology Co Ltd
Priority date: 2021-01-22
Filing date: 2021-11-22
Publication date: 2022-02-25
Anticipated expiration: 2041-11-22
Also published as: CN114137629B; CN114089427B; CN114137629A; CN112816947A; CN112946632A; CN112816981A; CN112946632B

Abstract

The invention discloses a microwave detection device for improving the detection reliability of human body, which is characterized in that the microwave detection device feeds back the activity existence characteristic corresponding to the movement of the human body by a first mode Doppler intermediate frequency signal according to the excitation of a first mode excitation signal in a first detection mode, feeds back the static existence characteristic corresponding to the heartbeat and/or breathing micro-action of the human body by an infrared pyroelectric sensor according to the subarea of a Fresnel lens in the radiation direction vertical to a first mode microwave beam in the first detection mode to compensate the responsiveness of the first mode Doppler intermediate frequency signal to the activity existence characteristic in the direction, and feeds back the static existence characteristic corresponding to the heartbeat and/or breathing micro-action of the human body by a fluctuation signal in a second detection mode, wherein the first mode excitation signal is an intermittent signal with the pulse working time of less than 1 second and the duty ratio of less than 10 percent so as to form the equivalent reduction of the area of a motion reflection surface of a corresponding object and eliminate the environmental micro-action interference and the micro-action interference caused by the target detection space Environmental interference due to the wave's penetration characteristics.

Description

Microwave detection device for improving detection reliability of human body

Technical Field

The invention relates to the field of presence detection, in particular to a microwave detection device for improving the detection reliability of human presence.

Background

With the development of the internet of things technology, the requirements of artificial intelligence, smart home and intelligent security technology on environment detection, particularly on the detection accuracy of the existence or non-existence of a human body and the behavior state of the human body in the existing state are higher and higher, and only if a detection result which is accurate enough is obtained, an accurate judgment basis can be provided for the intelligent terminal device. The microwave detection technology based on the Doppler effect principle is used as a human-object, and an important junction connected between the objects has unique advantages in behavior detection and existence detection technologies, and can detect moving objects, such as motion characteristics, moving characteristics and micro-motion characteristics of a human, even heartbeat and respiration characteristic information of the human under the condition of not invading the privacy of the human, so that the microwave detection technology has wide application prospects.

In order to obtain a sufficiently reliable detection result, particularly based on the detection of the human body actions including the human body heartbeat and/or the respiratory micro-actions, the human body actions including the human body heartbeat and/or the respiratory micro-actions are fed back in the corresponding detection result, so that the reliability of the corresponding detection result can be improved based on the feedback of the corresponding detection result on the human body heartbeat and/or the respiratory micro-actions when the human body is kept in a static posture, such as a sitting posture and a lying-on-stomach sleeping posture, thereby realizing the accurate detection on the existence of the human body, wherein the frequency and the amplitude of the human body heartbeat and/or the respiratory micro-actions are limited, the emission duration of the microwaves has the requirement of second level or the requirement of more than 10 percent of duty ratio, and the human body actions including the human body heartbeat and/or the respiratory micro-actions are detected for adapting to different states and postures of the human body (such as a state that the human body is covered by a thick solid garment and a posture that the human body backs on the microwave detection device) And has a high requirement for the diffraction of the emitted microwaves. Corresponding to the existing microwave detection device based on the doppler effect principle for detecting the existence of human body, the ISM frequency band with more frequency ranges than the C-band and the X-band is operated in the mode of continuously transmitting microwaves, or the ISM frequency band with the frequency ranges of the C-band and the X-band is operated in the mode of discontinuously transmitting microwaves with the pulse operating time of the second level or more than 10% of the duty ratio. However, when detecting a human body movement including a human body heartbeat and/or a respiratory micro movement (micro movement) by microwaves of ISM bands in frequency ranges of C band and X band, it is difficult to ensure feedback accuracy of corresponding detection results to the human body heartbeat and/or respiratory micro movement due to low frequency of the corresponding ISM band, and meanwhile, in practical applications, wall-through/glass behavior of correspondingly emitted microwaves based on strong penetration characteristics is uncontrollable, which easily causes a situation that an actual detection space of the existing microwave detection apparatus is not matched with a corresponding target detection area, for example, a situation that the actual detection space spreads out of the target detection area, so that an environment interference state exists in an actual detection space outside the target detection area, including motion interference, electromagnetic interference and self-excitation interference caused by electromagnetic shielding environment, and interference is caused to the corresponding detection results to reduce interference of the corresponding detection results to the human body movement including the human body heartbeat and/or respiratory micro movement including respiratory micro movement The reliability of the feedback of the human body actions is realized, and the environmental micro-actions in the actual detection space can be simultaneously detected due to the detection requirement of the human body heartbeat and/or respiratory micro-actions, such as the curtain fluttering actions in the actual detection space can be fed back by the corresponding detection results, thereby further reducing the reliability of the feedback of the corresponding detection results on the human body actions including the human body heartbeat and/or respiratory micro-actions.

In addition, based on the requirement of second-class requirement or the requirement of more than 10% duty ratio for the duration of the emission of the microwave, the operating current of the microwave detection device is 10-50 mA and cannot be adapted to the battery power supply, specifically, taking a battery with 2000mAh capacity as an example for supplying power to the microwave detection device, when the operating current of the microwave detection device is 25mA, the microwave detection device works for at most 80 hours, i.e. the battery needs to be charged or replaced, and the microwave detection device is mostly fixedly installed on the ceiling in a vertical detection manner, i.e. the charging frequency or the battery replacement frequency of 80 hours/time is too frequent and is impractical, so the existing microwave detection device is designed in a power grid supply manner and is connected into a power grid through a corresponding line in a wired networking manner. However, the microwave detection device adopts a wired networking mode, which has complex wiring, and on one hand, the microwave detection device has higher installation cost, such as wire material cost and wire material wiring cost, especially hidden wire material wiring cost during post-installation, which is much higher than the cost of the microwave detection device itself in practice, and on the other hand, the complex wiring is not favorable for maintenance and repair, which causes a great increase in maintenance and repair cost, that is, the popularization of the microwave detection device is greatly limited by the installation and maintenance and repair costs of the microwave detection device.

That is, in order to adapt to different states and postures of the human body to detect the human body actions including the heartbeat and/or respiratory micro-actions of the human body so as to realize the accurate detection of the existence of the human body in different states and postures of the human body, the existing microwave detection device works in a mode of continuously transmitting microwaves in an ISM frequency band which is more than a frequency range of a C wave band and an X wave band, or works in a mode of intermittently transmitting microwaves in an ISM frequency band of the frequency range of the C wave band and the X wave band at a pulse working time of a second level or more than 10% of duty ratio, wherein the corresponding frequency band limitation is difficult to ensure the feedback precision of corresponding detection results to the heartbeat and/or respiratory micro-actions of the human body, meanwhile, in practical application, the wall penetrating/glass actions of the corresponding transmitted microwaves based on strong penetrating characteristics are uncontrollable, and the corresponding detection results are easily interfered by the environment outside a target detection area, and because of the detection requirement for the human heartbeat and/or respiratory micro-motion, the corresponding detection result is also easily interfered by the environmental micro-motion of the actual detection space, so that the feedback of the existing microwave detection device to the human motion including the human heartbeat and/or respiratory micro-motion in the actual use is not reliable, and in addition, the power consumption of the microwave detection device is difficult to reduce.

Disclosure of Invention

An object of the present invention is to provide a microwave detection apparatus for improving the detection reliability of human body, wherein the microwave detection apparatus is capable of detecting human body actions including human body heartbeat and/or respiratory micro-actions, and in practical applications, is capable of resisting environmental interference outside a target detection region and environmental micro-action interference of the target detection region, so as to ensure the correlation between corresponding detection results and human body actions including human body heartbeat and/or respiratory micro-actions in the target detection region, thereby realizing accurate detection of human body presence.

Another object of the present invention is to provide a microwave detecting device for improving the reliability of human body presence detection, wherein the doppler effect principle is used to feed back the motion presence characteristic corresponding to the human body movement by a first mode doppler intermediate frequency signal to ensure the instant feedback of the presence or absence of the human body corresponding to the detection result, and the fluctuation signal is used to feed back the static presence characteristic corresponding to the human body heartbeat and/or respiratory micro-motion, so as to detect the human body movement including the human body heartbeat and/or respiratory micro-motion by respectively detecting the motion presence characteristic corresponding to the human body movement and the static presence characteristic corresponding to the human body heartbeat and/or respiratory micro-motion.

Another object of the present invention is to provide a microwave detecting device for improving the detection reliability of human presence, wherein the microwave detecting device is excited by a first mode excitation signal to emit a first mode microwave beam corresponding to the frequency of the first mode excitation signal, and receives a first mode reflection echo formed by the reflection of the first mode microwave beam by a corresponding object to generate a corresponding first mode echo signal, and generates the first mode doppler intermediate frequency signal corresponding to the frequency or phase difference between the first mode excitation signal and the first mode echo signal by means of frequency mixing detection based on the doppler effect principle, wherein the amplitude of the first mode doppler intermediate frequency signal is directly related to the energy level of the reflection echo formed by the reflection of the moving object and the frequency or phase difference level between the echo signal and the first mode excitation signal, the amplitude of the first mode Doppler intermediate frequency signal is proportional to the area and the movement speed of the movement reflecting surface of the corresponding object and is inversely proportional to the distance between the detection direction of the microwave detection device and the microwave detection device, wherein the degree of influence of the change of the area and the movement speed of the movement reflecting surface of the corresponding object on the amplitude of the first mode Doppler intermediate frequency signal is weakened in a manner of equivalently greatly reducing the area of the movement reflecting surface of the corresponding object, the inversely proportional ratio of the amplitude of the first mode Doppler intermediate frequency signal and the distance between the detection direction of the microwave detection device and the microwave detection device is relatively improved, the definition of the detection distance mainly corresponding to the existence characteristic of the activity is set for the corresponding threshold value of the amplitude of the first mode Doppler intermediate frequency signal, and the attenuation caused by the penetration behavior and the reflection behavior of the microwave based on the penetration characteristic and the reflection characteristic is equivalent to the attenuation caused by the detection behavior The reduction in range, that is, the active presence feature of the non-target detection region diffused based on the penetration characteristic and the reflection characteristic of the microwave has a relatively low amplitude in the first mode doppler intermediate frequency signal, thereby allowing the active presence feature to be shielded based on the corresponding threshold setting of the amplitude of the first mode doppler intermediate frequency signal, so that the effective detection space of the microwave detection apparatus for the active presence feature based on the first mode doppler intermediate frequency signal can be precisely defined according to the corresponding threshold setting to match with the corresponding target detection region, thereby eliminating the environmental interference of the non-target detection region, such as the active presence feature of the non-target detection region diffused and diffused based on the penetration characteristic and the reflection characteristic of the microwave.

It is another object of the present invention to provide a microwave detection device that improves the reliability of human presence detection, wherein the amplitude span corresponding to the activity existence feature corresponding to the human body movement in the first mode Doppler intermediate frequency signal is narrowed and the amplitude corresponding to the environmental micro-movement is reduced in a manner of equivalently and greatly reducing the area of the motion reflecting surface of the corresponding object, so as to be beneficial to eliminate the environmental micro-motion interference of the effective detection space according to the corresponding threshold value setting based on the amplitude span of the corresponding activity existence characteristic in the first mode Doppler intermediate frequency signal, namely, the relevance between the first mode Doppler intermediate frequency signal and the activity existing characteristics in the target detection area is improved, so that the activity existing characteristics corresponding to the movement of the human body in the target detection area can be accurately fed back, and the environmental micro-motion interference of the target detection area is eliminated.

It is another object of the present invention to provide a microwave detection device that improves the reliability of human presence detection, wherein the duty ratio of the first mode excitation signal is set, the first mode excitation signal is specifically set to be an intermittent signal with the pulse working time less than 1 second and the duty ratio less than 10 percent, to form an intermittent emission of said first mode microwave beam by said microwave detection means to form an equivalent reduction in the area of the moving reflective surface of the respective object, thereby facilitating the exclusion of environmental micro-motion interference of the active detection volume and the formation of an accurate definition of the active detection volume characteristic based on the thresholding of the first mode doppler intermediate frequency signal, namely, the environment interference outside the target detection area and the environment micro-motion interference of the target detection area are resisted in a state that the effective detection space of the activity existence characteristics is matched with the corresponding target detection area.

Another object of the present invention is to provide a microwave detecting device for improving the detection reliability of human body, wherein by further reducing the amplitude of the first mode excitation signal, the basic intensity of the first mode microwave beam is reduced, and the energy level corresponding to the reflected echo is reduced, so that the correlation between the frequency or phase difference value of the echo signal and the first mode excitation signal and the amplitude of the first mode doppler intermediate frequency signal is improved, which is favorable for improving the correlation between the first mode doppler intermediate frequency signal and the activity existence characteristic in the target detection area, so as to be able to eliminate the environmental micro-action interference in the target detection area, and further accurately feed back the activity existence characteristic corresponding to the human body movement in the target detection area.

It is another object of the present invention to provide a microwave detecting device for improving the reliability of human presence detection, wherein the magnitude of the first mode doppler intermediate frequency signal is related to the moving speed of a moving object in the detecting direction of the microwave detecting device based on the doppler effect principle, i.e. the first mode doppler intermediate frequency signal has a low responsiveness to the presence of activity characteristic in the direction perpendicular to the detecting direction of the microwave detecting device, and the detection sensitivity of the microwave detecting device corresponding to the presence of activity characteristic in the direction perpendicular to the detecting direction of the microwave detecting device is lower based on the duty ratio setting of the first mode excitation signal and the reduction of the magnitude of the first mode excitation signal, wherein in order to compensate the detection sensitivity of the microwave detecting device to the presence of activity characteristic in the direction perpendicular to the detecting direction of the microwave detecting device, the microwave detection device is further based on the partition of a Fresnel lens in the detection direction perpendicular to the microwave detection device on the target detection area, and an infrared pyroelectric sensor (PIR) is used for detecting the cross-area action of a human body in the target detection area in the detection direction perpendicular to the microwave detection device, so that the detection sensitivity of the microwave detection device on the movement existence characteristics in the target detection area is improved, and the accurate detection of the movement existence characteristics corresponding to the movement of the human body in the target detection area is facilitated.

Another object of the present invention is to provide a microwave detecting device for improving the reliability of human body presence detection, wherein the microwave detecting device is excited by a second mode excitation signal to emit a second mode microwave beam corresponding to the frequency of the second mode excitation signal, and receives a second mode reflection echo formed by the second mode microwave beam reflected by a corresponding object to generate a corresponding second mode echo signal, and generates a second mode doppler intermediate frequency signal corresponding to the frequency or phase difference between the second mode excitation signal and the second mode echo signal by means of frequency mixing detection based on the doppler effect principle, and converts the second mode doppler intermediate frequency signal into the fluctuation signal based on the change of the frequency/amplitude of the second mode doppler intermediate frequency signal with time, that is, the fluctuation signal is the change of the frequency/amplitude of the second mode doppler intermediate frequency signal with time, the fluctuation of the amplitude of the fluctuation signal corresponds to the fluctuation of the motion speed of the corresponding object with time, corresponding to an action that the relative speed of the human body tends to zero from beginning to end when the corresponding object is a human body and the human body action is represented by the fluctuation signal, namely the fluctuation frequency of the fluctuation signal in the amplitude corresponds to the frequency of the corresponding action, so that when the fluctuation signal in a specific frequency range in the fluctuation signal is selected by filtering to correspond to the human body action of feeding back the specific frequency range, in particular when the specific frequency range is in the frequency range smaller than 50Hz, the specific frequency range is at the extremely low frequency of electromagnetic silence, and the high-magnification of the fluctuation signal in the specific frequency range does not affect the accuracy of the fluctuation signal in the specific frequency range, the corresponding fluctuation in the fluctuation signal corresponding to the human body static existence characteristic in the specific frequency range is allowed to be identified in a high-magnification mode, so that independent accurate detection of the static existence characteristic corresponding to the human body heartbeat and/or respiratory micro-motion is realized based on selection of the specific frequency range to eliminate environmental interference of an effective detection space.

It is another object of the present invention to provide a microwave detection apparatus for improving detection reliability of human presence, wherein the amplitude of the respective fluctuation signals is directly related to the motion amplitude of the human body under the same distance limit, wherein the corresponding threshold setting for the amplitude of the fluctuation signals mainly corresponds to the definition of the detection distance for the static presence characteristic due to the human body's heartbeat and/or respiration type micro-motions with a narrower amplitude span corresponding to the amplitude of the fluctuation signals, and the attenuation caused by the penetration behavior and the reflection behavior of the microwaves based on the penetration characteristic and the reflection characteristic is equivalent to the reduction in the detection distance, that is, the static presence characteristic of the non-target detection region diffused based on the penetration characteristic and the reflection characteristic of the microwaves has a relatively lower fluctuation amplitude in the fluctuation signals, thereby allowing the corresponding threshold setting based on the amplitude of the fluctuation signals to be masked, therefore, the effective detection space of the microwave detection device for the static existence characteristics based on the fluctuation signal of the extremely low frequency can be accurately defined according to the corresponding threshold value setting and matched with the corresponding target detection area, so that the environmental interference of a non-target detection area, such as the environmental interference of the non-target detection area formed by wall-through diffusion and reflection/diffusion based on the penetration characteristic and the reflection characteristic of the microwave, is eliminated, namely, the relevance of the fluctuation signal and the static existence characteristics in the target detection area is improved, and the static existence characteristics corresponding to the human heartbeat and/or respiratory micro-motions in the target detection area can be accurately fed back.

It is another object of the present invention to provide a microwave detecting device for improving the reliability of human presence detection, wherein the first mode doppler intermediate frequency signal feeds back the motion presence characteristic corresponding to the motion of human body based on the doppler effect principle, and the fresnel lens divides the target detection region in the direction perpendicular to the detection direction of the microwave detecting device, the infrared pyroelectric sensor (PIR) detects the transregional motion of human body in the target detection region in the direction perpendicular to the detection direction of the microwave detecting device, thereby compensating the defect of low responsiveness of the first mode doppler intermediate frequency signal to the motion presence characteristic perpendicular to the detection direction of the microwave detecting device, and the wave signal independently feeds back the static presence characteristic corresponding to the micro motion of human heartbeat and/or respiration, such that the first mode excitation signal and the second mode excitation signal in the frequency ranges of C band and X band Under the limitation of the same ISM frequency band in the periphery, based on the duty ratio setting of the first mode excitation signal, the conversion of the second mode Doppler intermediate frequency signal and the selection of the fluctuation signal in the specific frequency range, the interference of the wall penetrating/glass behavior of the first mode microwave beam and the second mode microwave beam based on the stronger penetrating characteristic on the corresponding detection result can be inhibited while the diffraction requirement of the microwave detection device on the second mode microwave beam is kept, so that the correlation degree of the corresponding detection result and the human body action including the human body heartbeat and/or respiratory micro-action in the target detection area is ensured, and the accurate detection on the existence of the human body is realized.

It is another object of the present invention to provide a microwave detecting device for improving the reliability of human presence detection, wherein based on the duty ratio setting of the first mode excitation signal, the conversion of the second mode doppler intermediate frequency signal and the selection of the fluctuation signal in the specific frequency range, the first mode doppler intermediate frequency signal is used to feed back the activity presence characteristic corresponding to the human movement action, and the fluctuation signal is used to independently feed back the static presence characteristic corresponding to the human heartbeat and/or respiratory type micro-actions, and the correlation between the first mode doppler intermediate frequency signal and the activity presence characteristic in the target detection region and the correlation between the fluctuation signal and the static presence characteristic in the target detection region can be respectively improved to improve the reliability of human presence detection.

Another object of the present invention is to provide a microwave detecting device for improving the reliability of human presence detection, which allows the behavior state of a human body in a target detection region to be determined simultaneously with the detection of the human body activity presence characteristic and the static presence characteristic based on corresponding determination rules, thereby facilitating the intelligent application of the microwave detecting device.

It is another object of the present invention to provide a microwave detecting device for improving human presence detection reliability, wherein based on the above duty ratio setting for the first mode excitation signal, or further reducing the amplitude of the first mode excitation signal, such as reducing the amplitude of the first mode excitation signal for a continuous signal state, or reducing the amplitude of the first mode excitation signal for an intermittent signal state (not limited to an intermittent signal state satisfying the above duty ratio setting), the microwave detecting device is advantageous to reduce the total power consumption of the microwave detecting device based on the detection power consumption of the active presence characteristic of the first mode doppler intermediate frequency signal for a target detection region being reduced, in particular when the first mode excitation signal and the second mode excitation signal are output with one processor module, characterized as a state where the processor module is independently outputting the first mode excitation signal, the power supply end current of the processor module is I1, and the power supply end current of the processor module is I2 when the processor module independently outputs the second mode excitation signal, wherein I1: I2 is less than or equal to 1:2, and preferably I1: I2 is less than or equal to 1: 10.

Another object of the present invention is to provide a microwave detecting device for improving the reliability of detecting human presence, wherein based on the low power consumption characteristic of an infrared pyroelectric sensor (PIR), when the active presence characteristic corresponding to the movement of a human body is fed back by the first mode doppler intermediate frequency signal and the cross-zone motion of the human body in the target detection area in the direction perpendicular to the detection direction of the microwave detecting device is detected by the infrared pyroelectric sensor (PIR) to compensate for the low responsivity defect of the first mode doppler intermediate frequency signal to the active presence characteristic perpendicular to the detection direction of the microwave detecting device, the low power consumption characteristic of the microwave detecting device for detecting the active presence characteristic of the target detection area can be maintained to facilitate the reduction of the total power consumption of the microwave detecting device.

Another object of the present invention is to provide a microwave detecting device for improving the reliability of human presence detection, wherein the first mode doppler intermediate frequency signal is used to feed back the activity presence characteristic corresponding to the movement of the human body, and an infrared pyroelectric sensor (PIR) is used to detect the transregional action of the human body in the target detection region in the direction perpendicular to the detection direction of the microwave detecting device so as to compensate the defect of low responsiveness of the first mode doppler intermediate frequency signal to the activity presence characteristic in the direction perpendicular to the detection direction of the microwave detecting device, and based on the detection result of the activity presence characteristic in the target detection region, the detection of the static presence characteristic corresponding to the heartbeat and/or respiratory type micro-actions of the human body is triggered according to the corresponding trigger rule, so as to reduce the average power consumption of the microwave detecting device and ensure the accuracy of the detection result of the microwave detecting device in the corresponding application scenario, and intelligently realizing the control of the contextual model of the electrical equipment based on the detection result of whether the human body exists in the target detection area or not and the judgment of the behavior state of the human body in the target detection area when the state that the human body exists in the target detection area is detected.

It is another object of the present invention to provide a microwave detection device that improves the reliability of human presence detection, wherein after the detection result of the activity presence characteristic corresponding to the human body movement action is changed from the non-presence to the presence, a transition from absent to present corresponding to the first mode Doppler intermediate frequency signal and/or the detection of an activity presence characteristic by the infrared pyroelectric sensor (PIR), further detecting the static existence characteristics corresponding to the heartbeat and/or breathing type micro-motions of the human body, so as to ensure the accuracy of the detection result of the human body existing in the target detection area based on the detection result of the acquired static existence characteristics, meanwhile, the method is favorable for reducing the detection frequency of static existence characteristics corresponding to human heartbeat and/or breathing micro-motions in practical application, particularly in the practical application scene of small probability/transient existence of a human body, so that the average power consumption of the microwave detection device is reduced.

It is another object of the present invention to provide a microwave detection device that improves the reliability of human presence detection, wherein a moving motion of the human body is necessarily formed in view of an entering or exiting motion of the human body to or from the corresponding target detection area, after the detection result of the activity presence feature corresponding to the human body movement motion is changed from presence to absence, after the detection of the presence of activity feature corresponding to the first mode Doppler intermediate frequency signal and/or the infrared pyroelectric sensor (PIR) changes from present to absent, further detecting the static existence characteristics corresponding to the heartbeat and/or respiratory micro-motions of the human body so as to realize the accurate detection of the existence of the human body, meanwhile, the detection frequency of the static existing characteristics corresponding to the heartbeat and/or breathing micro-motion of the human body is reduced in practical application, so that the average power consumption of the microwave detection device is reduced.

Another object of the present invention is to provide a microwave detecting apparatus for improving detection reliability of human body, wherein the microwave detecting apparatus controls an operating state of at least one electrical device to form the microwave detecting device with the electrical device based on the state of human body in the target detection area and the state of human body in the target detection area to judge the behavior state of human body in the target detection area, so as to intelligently realize control of the contextual model of the electrical device based on the state of human body in the target detection area and the state of human body in the target detection area.

Another object of the present invention is to provide a microwave detecting device for improving the reliability of human body presence detection, wherein the microwave detecting device has a first detection mode and a second detection mode, wherein in the first detection mode, the microwave detecting device feeds back the activity presence characteristic corresponding to the human body movement action by using the first mode doppler intermediate frequency signal, and uses an infrared pyroelectric sensor (PIR) to detect the transregional action of the human body in the target detection region in the direction perpendicular to the detection direction of the microwave detecting device to compensate the low responsiveness defect of the activity presence characteristic of the first mode doppler intermediate frequency signal in the direction perpendicular to the detection direction of the microwave detecting device, thereby reducing the power consumption requirement of the microwave detecting device and ensuring the instant feedback and feedback accuracy of the corresponding detection result on the presence or absence of the human body, in the second detection mode, the microwave detection device feeds back static existence characteristics corresponding to the heartbeat and/or breathing micro actions of the human body by the fluctuation signal so as to ensure the accurate detection of the existence of the human body.

It is another object of the present invention to provide a microwave detecting apparatus for improving the reliability of human presence detection, in which the microwave detecting apparatus triggers the timing of a time period T1 based on the detection result of the first detection mode that the target detection region has the active presence feature, and enters the second detection mode at least once within a time period T1 to continue the timing of the time period T1 based on the detection result of the target detection region having the static presence feature forming a continuation condition for the time period T1 within the time period T1 (including but not limited to resetting the timing of the time period T1 with the current time node as a timing start point, and resetting the time period T1 with a time node after the time period T1 as a timing start point), and after the timing of the time period T1 ends (corresponding to the detection result of the target detection region having no static presence feature forming a continuation condition for the exit time period T1 within the time period T1), therefore, the accuracy of the detection result of the human body in the target detection area is guaranteed based on the obtained detection result of the static existence characteristic, and meanwhile, the detection frequency of the static existence characteristic corresponding to the heartbeat and/or breathing micro motion of the human body is reduced to reduce the average power consumption of the microwave detection device in practical application, particularly in the practical application scene of small probability/short existence of the human body.

It is another object of the present invention to provide a microwave detection device for improving detection reliability of human presence, wherein the microwave detection device triggers timing of a time period T1 based on the detection result of the first detection mode detecting the presence of the active presence feature in the target detection region, and delays entering the second detection mode for a time period T1, so as to reduce the detection frequency of the static presence feature corresponding to the heartbeat and/or respiratory type micro-motion of the human body and reduce the average power consumption of the microwave detection device.

It is another object of the present invention to provide a microwave detecting device for improving the reliability of human body presence detection, wherein in view of the fact that the entering or leaving motion of the human body with respect to the corresponding detection area necessarily forms the moving motion of the human body, after the microwave detecting device detects the presence of the activity presence characteristic of the target detection area based on the first detection mode until the target detection area does not have the activity presence characteristic for a continuous time period of t1, the human body entering the target detection area is in a static presence state or a state of leaving the target detection area, the microwave detecting device enters the second detection mode only at least once after detecting the presence of the activity presence characteristic of the target detection area based on the first detection mode until the presence of the activity presence characteristic of the target detection area during a continuous time period of t1, and then in the second detection mode, the detection result of the presence of the static presence characteristic of the target detection area corresponds to the presence state of the human body entering the target detection area in a static state And the human body entering the target detection area is in a state of leaving the target detection area corresponding to the detection result of the static existence characteristic of the target detection area, so that the average power consumption of the microwave detection device is reduced and the accuracy of the detection result of the microwave detection device is ensured.

It is another object of the present invention to provide a microwave detection apparatus for improving detection reliability of human presence, wherein when the microwave detection apparatus detects the presence of an activity-presence feature in a target detection region based on the first detection mode, the corresponding human being is present in an active state in/enters the target detection region, and subsequently, when the microwave detection apparatus detects the absence of an activity-presence feature in the target detection region for a continuous time period of t1 based on the first detection mode, the detection result of the microwave detection apparatus that the presence of a static-presence feature in the target detection region based on the second detection mode corresponds to the presence of a human being in a static state in the target detection region, and the detection result of the absence of a static-presence feature in the target detection region corresponds to the presence of a human being in a state of leaving the target detection region, so as to reduce average power consumption of the microwave detection apparatus and ensure accurate detection result of the microwave detection apparatus And intelligently realizing the control of the contextual model of the electrical equipment based on the detection result of whether the human body exists in the target detection area and the judgment of the behavior state of the human body in the target detection area under the condition that the human body exists in the target detection area.

It is another object of the present invention to provide a microwave detecting device for improving the reliability of human presence detection, wherein the microwave detecting device operates in the first detection mode after being powered on, wherein the microwave detecting device triggers the timing of the time duration t1 after detecting the detection result of the presence of the active presence feature in the target detection region based on the first detection mode, and continues the timing of the time duration t1 based on the detection result of the presence of the active presence feature in the target detection region forming a time duration continuation condition for the time duration t1 in the time duration t1 (including but not limited to resetting the timing of the time duration t1 with the current time node as a timing starting point, and re-timing the time duration t1 with the time node after the time duration t1 as a timing starting point), and after the timing of the time duration t1 (corresponding to the detection result of the absence of the active presence feature in the target detection region in the time duration t1 not forming a time duration continuation condition for the time duration t 1), and entering the second detection mode at least once, so as to reduce the average power consumption of the microwave detection device and ensure the accuracy of the detection result of the microwave detection device.

It is another object of the present invention to provide a microwave detecting device for improving the reliability of human presence detection, wherein in the first detection mode, the microwave detecting device detects human activity in a target detection area with a first mode microwave beam having a pulse on time of less than 1 second and a duty cycle of less than 10% based on the doppler effect principle, and detects a human body in the target detection area in a transzone action perpendicular to the detection direction of the microwave detecting device with an infrared pyroelectric sensor (PIR) to compensate for a low responsivity defect of the first mode doppler intermediate frequency signal to the presence of activity characteristic perpendicular to the detection direction of the microwave detecting device, and obtains a detection result of whether the target detection area has the presence of activity characteristic based on the first mode intermediate frequency doppler signal and/or the feedback of the infrared pyroelectric sensor (PIR) to the presence of activity characteristic, the low power consumption state of the microwave detection device in the first detection mode can be realized; in the second detection mode, the microwave detection device detects the human body movement including human heartbeat and/or respiratory micro-actions in the target detection area by the second mode microwave beam in a continuous emission state based on the Doppler effect principle or the second mode microwave beam with the pulse working time of more than or equal to 1 second or more than or equal to 10% duty ratio, and acquires the detection result of whether the target detection area has static existence characteristics or not by setting corresponding threshold values, thereby ensuring the accurate detection of the existence of the human body.

It is another object of the present invention to provide a microwave detecting device for improving the reliability of human presence detection, wherein in the first detection mode, the microwave detecting device detects human activity in a target detection area with a first mode microwave beam having a pulse on time of less than 1 second and a duty cycle of less than 10% based on the doppler effect principle, and detects a human body in the target detection area in a transzone action perpendicular to the detection direction of the microwave detecting device with an infrared pyroelectric sensor (PIR) to compensate for a low responsivity defect of the first mode doppler intermediate frequency signal to the presence of activity characteristic perpendicular to the detection direction of the microwave detecting device, and obtains a detection result of whether the target detection area has the presence of activity characteristic based on the first mode intermediate frequency doppler signal and/or the feedback of the infrared pyroelectric sensor (PIR) to the presence of activity characteristic, based on the corresponding pulse working time and duty ratio setting, the response sensitivity of the first mode Doppler intermediate frequency signal to weak actions is reduced, and the relevance degree of the activity existence characteristics corresponding to the human body movement actions is improved, so that the interference of environmental actions on the detection results of the activity existence characteristics is reduced and the detection accuracy of the activity existence characteristics corresponding to the human body movement actions is improved based on the corresponding threshold setting in the first detection mode, and the reliability of the microwave detection device is correspondingly improved.

It is another object of the present invention to provide a microwave detecting device for improving the detection reliability of human presence, wherein in the second detection mode, the microwave detecting device feeds back a static presence characteristic corresponding to the heartbeat and/or respiration type micro-motions of the human body with the fluctuation signal, wherein the amplitude of the fluctuation signal is directly related to the motion amplitude of the human body under the same distance limit, wherein since the heartbeat and/or respiration type micro-motions of the human body have a narrower amplitude span, and the amplitude of the fluctuation signal has a narrower amplitude span, the corresponding threshold setting for the amplitude of the multi-wave motion signal mainly corresponds to the definition of the detection distance of the static presence characteristic, and the attenuation caused by the penetration and reflection behaviors of the microwave based on the penetration and reflection characteristics is equivalent to the reduction in the effective detection distance, that is, the static existence feature of the non-target detection area diffused based on the penetration characteristic and the reflection characteristic of the microwave is not in the effective detection space and cannot be detected, so that the detection range of the microwave detection device for the static existence feature in the second detection mode can be accurately defined according to the corresponding threshold setting, and the interference of the static existence feature of the non-target detection area is eliminated.

It is another object of the present invention to provide a microwave detecting device for improving the reliability of detecting human presence, wherein the microwave detecting device detects the presence of activity in the first mode microwave beam with a pulse on time less than 1 second and a duty cycle less than 10% based on the doppler effect principle in the first detection mode, and detects the transregional action of the human body in the target detection area in the direction perpendicular to the detection direction of the microwave detecting device by an infrared pyroelectric sensor (PIR) to compensate the defect of low responsivity of the first mode doppler intermediate frequency signal to the presence of activity in the direction perpendicular to the detection direction of the microwave detecting device, so as to obtain the detection result of whether the target detection area has the presence of activity based on the first mode doppler intermediate frequency signal and/or the feedback of the infrared pyroelectric sensor (PIR) to the presence of activity, and detecting the static existence characteristics by the second mode microwave beam with the pulse working time of more than or equal to 1 second or more than or equal to 10% duty ratio in the second detection mode, wherein based on the entering rule of the second detection mode, the defect that the state of the existence of the human body is easily misjudged because the first mode Doppler intermediate frequency signal and/or the infrared pyroelectric sensor (PIR) cannot feed back the static existence characteristics in the first detection mode is overcome, the average power consumption of the microwave detection device is reduced, and the behavior state of the human body in the target detection area is judged according to the detection of the activity existence characteristics and the static existence characteristics of the human body based on the corresponding judgment rule while the accurate detection of the existence of the human body is realized.

It is another object of the present invention to provide a microwave detection device that improves the reliability of human presence detection, wherein the second detection mode is entered at least once for a time duration t2 and for a time duration t2 after the time duration t1 has elapsed (corresponding to a detection result of the absence of the active presence feature in the target detection region for a time duration t1 of the duration no longer forming a time duration condition for a time duration t 1), and the second detection mode is exited after the time duration t2 has elapsed, or exit the second detection mode based on the detection of the presence of the static presence feature in the target detection region for a duration t2, so as to reduce the average power consumption of the microwave detection device based on the circulation logic and realize the accurate detection of the existence of the human body, and simultaneously, the behavior state of the human body in the target detection area is judged according to the detection of the human body activity existence characteristic and the static existence characteristic based on the corresponding judgment rule.

It is another object of the present invention to provide a microwave detecting device for improving detection reliability of human presence, wherein in the state of entering the second detection mode, the first detection mode is maintained, and the microwave detecting device returns to timing for time duration t1 after acquiring the detection result of the presence of activity of the target detection area based on the first detection mode, and preferably ends timing for time duration t2 to exit the second detection mode, i.e. in the loop logic of the microwave detecting device, the detection result of the presence of activity of the target detection area has higher priority than the detection result of the presence of static presence of the target detection area, and in any time duration, the microwave detecting device returns to timing for time duration t1 after acquiring the detection result of the presence of activity of the target detection area based on the first detection mode, the behavior state that the human body in the target detection area leaves the target detection area in the timing process of the time length t2 is prevented from being judged to be the static existence state of the target detection area by mistake, so that the accuracy of the detection result of the microwave detection device is guaranteed, and the average power consumption of the microwave detection device can be further reduced.

Another object of the present invention is to provide a microwave detecting device for improving human presence detection reliability, wherein the timing of the time duration t2 is triggered by a delay, that is, after the timing of the time duration t1 is ended, the timing of the time duration t2 is triggered by a delay, so as to avoid frequent triggering of the short static state of the human body in the target detection region to the timing of the time duration t2 by the delay triggering of the time duration t2, further reduce the average power consumption of the microwave detecting device by correspondingly avoiding frequent triggering of the second detection mode, and maintain the time duration t1 for a suitable time length to ensure the accuracy of the feedback of the microwave detecting device to the human behavior state based on the first detection mode.

Another object of the present invention is to provide a microwave detecting device for improving the reliability of detecting the presence of a human body, wherein the microwave detecting device controls the operating status of at least one of the electrical devices based on the determination result of the presence or absence of a human body in the target detection area, such as controlling a lamp to be in an illumination status based on the determination result of the presence of a human body in the target detection area and controlling the lamp to be in an off status based on the determination result of the absence of a human body in the target detection area, so as to achieve intelligent control over the electrical devices based on the determination result of the presence or absence of a human body in the target detection area.

Another object of the present invention is to provide a microwave detecting device for improving detection reliability of human presence, wherein the microwave detecting device further controls the operating state of the electrical device based on the determination of the behavior state of the human body in the target detection area, for example, adjusts environmental parameters such as ambient light, humidity, temperature, etc. based on the determination result that the human body exists in the target detection area in a static state, or the determination result that the human body exists in the target detection area in an active state, or the determination result that the human body enters the target detection area in an active state to control the corresponding electrical device, thereby implementing intelligent control of the electrical device.

Another object of the present invention is to provide a microwave detection apparatus adapted to improve detection reliability of human presence, wherein the microwave detection apparatus includes a wireless module, and the microwave detection apparatus controls a working state of the electrical device through the wireless module based on a determination result of presence or absence of a human body in a target detection area, so that the microwave detection apparatus is suitable for wirelessly networking with the corresponding electrical device or other microwave detection apparatuses, thereby facilitating simplification of installation, maintenance and repair of the microwave detection apparatus, and realizing an intelligent application scenario of the microwave detection apparatus.

It is another object of the present invention to provide a microwave detection device for improving detection reliability of human presence, wherein the microwave detection device operates in the first detection mode after being powered on, wherein when the microwave detection device obtains a detection result that an activity presence feature exists in a target detection region based on the first detection mode, it is determined that a human body enters/exists in an active state in the target detection region, and subsequently, when the microwave detection device obtains a detection result that an activity presence feature does not exist in the target detection region for a continuous time period of t1 based on the first detection mode, it triggers timing of a time period of t2 and enters the second detection mode at least once for a time period of t2, wherein the microwave detection device determines that a human body exists in a static state in the target detection region based on the second detection mode based on a detection result that a static presence feature exists in the target detection region, and judging that the human body entering the target detection area is in a state of leaving the target detection area according to a detection result that the target detection area does not have the static existence characteristic, and exiting the second detection mode after the timing of the time length t2 is finished, or exiting the second detection mode within the time length t2 based on a detection result that the human body exists in the target detection area, so that the average working current of the microwave detection device is favorably reduced to microampere level, and the microwave detection device is suitable for battery power supply.

Another object of the present invention is to provide a microwave detection device for improving detection reliability of human presence, wherein the microwave detection device is adapted to be powered by a battery, and can realize wireless networking of the microwave detection device by means of battery power supply, which is beneficial to simplify installation, maintenance and repair of the microwave detection device, thereby reducing installation, maintenance and repair costs of the microwave detection device, and further beneficial to popularization of the microwave detection device.

In order to achieve at least one of the above objects, the present invention provides a microwave detecting device, having a first detecting mode and a second detecting mode, and being adapted to detect an active presence characteristic corresponding to a movement of a human body in the first detecting mode and a static presence characteristic corresponding to a heartbeat and/or respiration type micro-movement of the human body in the second detecting mode, wherein the microwave detecting device is configured to enter the second detecting mode to detect the static presence characteristic according to a detection result of the active presence characteristic in the first detecting mode according to a corresponding trigger rule, and exit the second detecting mode according to a detection result of the static presence characteristic not detected, wherein in the first detecting mode, the microwave detecting device is excited by a first mode excitation signal to emit a first mode microwave beam having a frequency corresponding to the first mode excitation signal, and receiving a first mode echo signal generated by a first mode reflection echo formed by the first mode microwave beam reflected by a corresponding object, and generating a first mode doppler intermediate frequency signal corresponding to a frequency or phase difference between the first mode excitation signal and the first mode echo signal in a frequency mixing detection manner based on the doppler effect principle, and meanwhile, based on a partition of a fresnel lens on a target detection area in a direction perpendicular to a radiation direction of the first mode microwave beam, detecting a cross-area action of a human body in the target detection area in the direction perpendicular to the radiation direction of the first mode microwave beam with an infrared pyroelectric sensor to compensate a low responsivity defect of the first mode intermediate frequency doppler signal characteristic of an activity of the first mode intermediate frequency doppler signal on the direction perpendicular to the radiation direction of the first mode microwave beam, corresponding to the first detection mode, the microwave detection device feeds back a detection result representing that the target detection area has an activity existence characteristic according to the existence of a signal meeting a corresponding threshold condition and/or the existence of the infrared pyroelectric sensor on the cross-area action in the first mode Doppler intermediate frequency signal, wherein the first mode excitation signal is an intermittent signal with the pulse working time less than 1 second and the duty ratio less than 10%; wherein in the second detection mode, the microwave detection device is excited by a second mode excitation signal to emit a second mode microwave beam corresponding to the frequency of the second mode excitation signal, and receives a second mode reflection echo formed by the second mode microwave beam being reflected by a corresponding object to generate a corresponding second mode echo signal, and generates a second mode doppler intermediate frequency signal corresponding to the frequency or phase difference between the second mode excitation signal and the second mode echo signal in a mixed detection manner based on the doppler effect principle, and converts the second mode doppler intermediate frequency signal into a fluctuation signal based on the change of the frequency/amplitude of the second mode doppler intermediate frequency signal with time, and selects the fluctuation signal of a specific frequency range in the fluctuation signal in a filtering manner, such as an analog filtering mode or a digital filtering mode, wherein the specific frequency range is within a frequency range smaller than 50Hz, so as to characterize the detection result of the static existence characteristic in the target detection area based on the existence of the signal which satisfies the corresponding threshold condition and satisfies the corresponding threshold condition in the fluctuation signal of the specific frequency range.

In one embodiment, wherein the microwave detection means is arranged in said first detection mode to trigger timing of a time duration T1 based on the detection of the presence of an active presence feature in the target detection zone and to enter said second detection mode at least once during the time duration T1 to detect a static presence feature and to continue timing of the time duration T1 on detection of the presence of a static presence feature in the target detection zone to form a time continuation condition for the time duration T1 and to exit said second detection mode on detection of the absence of a static presence feature in the target detection zone.

In an embodiment, in the first detection mode, the microwave detection apparatus is arranged to trigger timing of a time period T1 on the basis of the detection result of the presence of the active presence feature in the target detection zone, and to delay entry into the second detection mode for a time period T1.

In one embodiment, wherein the microwave detection device is configured to detect the static presence feature in the second detection mode, based on the detection result that the static presence feature is not present in the target detection area, the second detection mode is exited after the timing of the time duration T1 is ended.

In one embodiment, the microwave detecting device further comprises a wireless module, wherein the wireless module is configured to control the operating status of at least one electrical device based on the triggering condition of the timing of the time duration T1 and the ending condition of the timing of the time duration T1.

In an embodiment, wherein in the first detection mode, the microwave detection apparatus is arranged to trigger timing of a time period t1 based on the detection result of the presence of the active presence feature in the target detection area, and continuing the timing of the duration of t1 for a duration of t1 in response to the detection of the presence of the active presence feature by the target detection zone forming a continuation condition for the duration of t1, triggering the timing of the time duration t2 at the end of the time duration t1, and entering the second detection mode at least once within the time duration t2 to detect the static presence feature, a behavior state S4 in which the human body exists in the target detection region in a static state is recognized based on the detection result of the presence of the static presence characteristic in the target detection region, and identifying the behavior state S3 that the human body leaves the target detection area according to the detection result that the static existence characteristic does not exist in the target detection area, and exiting the second detection mode after the timing of the time length t2 is ended.

In one embodiment, the microwave detecting device further comprises a wireless module, wherein the wireless module is configured to control the operating state of the at least one electrical device based on the timing trigger condition of the time duration t1 and the end of the time duration t 2.

In one embodiment, where the time period t2 is set equal to or less than 1 minute, the time period t1 is set equal to or greater than 5 seconds.

In one embodiment, the microwave detection device is configured to exit the second detection mode by timing the duration t2 earlier than the end of the detection result of the presence of the static presence feature in the target detection area during the timing of the duration t 2.

In one embodiment, the microwave detection means is arranged to continue for a time period of t2 during the timing of time period t2 based on the detection of the presence of the static presence feature at the target detection zone forming a continuation condition for time period t 2.

In one embodiment, the microwave detection means is arranged to delay resetting the timing of the duration of t2 during the timing of the duration of t2 based on the detection result of the presence of the static presence feature of the target detection area to form a duration of t 2.

In one embodiment, the microwave detection means is arranged to remain in the first detection mode while detecting the active presence feature during the timing of the time period t2, and to terminate the timing of the time period t2 and trigger the timing of the time period t1 in response to the detection of the active presence feature in the target detection zone.

In one embodiment, the specific frequency range is set to be within a frequency range of 5Hz or less.

In one embodiment, the specific frequency range is set to be within a frequency range of 1Hz or less.

In one embodiment, the first mode excitation signal is set to a discontinuous signal having a pulse duty time of the order of microseconds or less and a duty cycle of less than 1%.

In one embodiment, the second mode excitation signal is set as a discontinuous signal having a pulse duty cycle of 1 second or more or 10% or more.

In one embodiment, the microwave detection device comprises:

a first microwave detection module, wherein in the first detection mode, the first microwave detection module is fed by the first mode excitation signal to emit the first mode microwave beam at a frequency corresponding to the first mode excitation signal;

a second microwave detection module, wherein in the second detection mode, the second mode detection module is fed by the second mode excitation signal to emit a second mode microwave beam at a frequency corresponding to the second mode excitation signal;

a processor module, wherein the processor module is communicatively connected to the first microwave detection module and the second microwave detection module and the pyroelectric infrared sensor to output the first mode excitation signal and the second mode excitation signal to the first microwave detection module and the second microwave detection module, respectively, and to receive feedback of the pyroelectric infrared sensor to the trans-zone action, wherein a power supply current of the processor module is I1 in a state where the processor module independently outputs the first mode excitation signal, and a power supply current of the processor module is I2 in a state where the processor module independently outputs the second mode excitation signal, wherein I1: I2 is not more than 1: 2.

In one embodiment, I1: I2 ≦ 1: 10.

In an embodiment, wherein the first microwave detection module and the pyroelectric infrared sensor are maintained in an operational state in a state in which the microwave detection device is powered on, the second microwave detection module is connected to and awakened/activated under control of the processor module, the microwave detection device is maintained in the first detection mode while detecting the activity presence characteristic corresponding to the second detection mode in which the second microwave detection module is awakened/activated.

In one embodiment, the microwave detection device comprises:

a microwave detection module, wherein the microwave detection module is configured to allow for being fed to emit a microwave beam corresponding to a respective excitation signal; and

a processor module, wherein said processor module is communicatively connected to said microwave detection module and said infrared pyroelectric sensor and is configured to feed said microwave detection module with a first mode excitation signal and receive feedback of said infrared pyroelectric sensor on transzone action in said first detection mode and to feed said microwave detection module with a second mode excitation signal in said second detection mode, said microwave detection module being fed by said first mode excitation signal to emit said first mode microwave beam corresponding to the frequency of said first mode excitation signal in correspondence with said first detection mode, and said microwave detection module being fed by said second mode excitation signal to emit a second mode microwave beam corresponding to the frequency of said second mode excitation signal in correspondence with said second detection mode, wherein the state of said first mode excitation signal is independently output at said processor module, the power supply end current of the processor module is I1, and the state of the second mode excitation signal is independently output in the processor module, the power supply end current of the processor module is I2, wherein I1: I2 is less than or equal to 1: 2.

In an embodiment, wherein the processor module is configured to output the first mode excitation signal concurrently with the second mode excitation signal, the second mode excitation signal is configured to be a discontinuous signal and is staggered from a pulse on time of the first mode excitation signal to maintain the first detection mode while detecting the activity presence characteristic in the second detection mode.

In one embodiment, in the second detection mode, the microwave detection device performs shunt detection of the active presence feature and the static presence feature based on the following steps to maintain the first detection mode equivalently in the second detection mode:

(i) transmitting the second mode microwave beam corresponding to the frequency of the second mode excitation signal;

(ii) receiving the second mode echo formed by the second mode microwave beam reflected by the corresponding object to generate a corresponding second mode echo signal;

(iii) generating the second mode Doppler intermediate frequency signal based on a frequency/phase difference between the second mode excitation signal and the second mode echo signal by means of mixer detection;

(iv) converting the second mode Doppler intermediate frequency signal into the fluctuating signal based on a change in frequency/amplitude of the second mode Doppler intermediate frequency signal with time; and

(v) selecting two paths of the fluctuation signals in two specific frequency ranges in the fluctuation signals in a filtering mode, wherein one specific frequency range is in a frequency range which is less than or equal to 3Hz, and the other specific frequency range is in a frequency range which is greater than 3Hz and less than 50 Hz;

wherein the processor module is configured to feed back an activity presence characteristic of a target detection zone with the fluctuation signal at the particular frequency range within a frequency range greater than 3Hz and less than 50Hz, and characterizing the detection result of the static existence characteristic of the target detection area according to the signals meeting the corresponding threshold condition and meeting the corresponding threshold condition in the fluctuation signals of the specific frequency range within the frequency range less than or equal to 3Hz, in a state that the infrared pyroelectric sensor is maintained to be powered, according to the signals meeting the corresponding threshold conditions and meeting the corresponding threshold conditions in the fluctuation signals of the specific frequency range within the frequency range larger than 3Hz and smaller than 50Hz and/or the detection result of the existence feedback of the infrared pyroelectric sensor to the cross-zone action, which represents that the target detection area has the activity existence characteristics, the first detection mode is equivalently maintained in the second detection mode.

Drawings

Fig. 1 is a schematic structural block diagram of a microwave detection device according to an embodiment of the present invention.

Fig. 2A and 2B are schematic diagrams illustrating an operating logic of the microwave detecting device according to the above embodiment of the present invention.

Fig. 3A and 3B are schematic diagrams illustrating another operation logic of the microwave detection apparatus according to the above embodiment of the present invention.

Fig. 4 is a schematic diagram illustrating the operation steps of the microwave detection apparatus in the second detection mode according to the above embodiment of the present invention.

Fig. 5 is a logic diagram illustrating the determination of the human behavior state by the microwave detection device according to the above embodiment of the present invention.

Fig. 6 is a schematic application diagram of the microwave detection device according to the above embodiment of the present invention.

Fig. 7A is a schematic structural block diagram of the microwave detection device according to a modified embodiment of the foregoing embodiment of the present invention.

Fig. 7B is a schematic diagram of an operating logic of the microwave detection apparatus according to the above modified embodiment of the present invention.

Fig. 7C is a schematic diagram of the operation steps of the microwave detection apparatus according to the above modified embodiment of the present invention in the second detection mode.

Fig. 7D is a schematic view illustrating another operation procedure of the microwave detection apparatus according to the above modified embodiment of the present invention in the second detection mode.

Detailed Description

The following description is presented to disclose the invention so as to enable any person skilled in the art to practice the invention. The preferred embodiments in the following description are given by way of example only, and other obvious variations will occur to those skilled in the art. The basic principles of the invention, as defined in the following description, may be applied to other embodiments, variations, modifications, equivalents, and other technical solutions without departing from the spirit and scope of the invention.

It will be understood by those skilled in the art that in the present disclosure, the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in an orientation or positional relationship indicated in the drawings for ease of description and simplicity of description, and do not indicate or imply that the referenced devices or components must be constructed and operated in a particular orientation and thus are not to be considered limiting.

It is understood that the terms "a" and "an" should be interpreted as meaning that a number of one element or element is one in one embodiment, while a number of other elements is one in another embodiment, and the terms "a" and "an" should not be interpreted as limiting the number.

The invention provides a microwave detection device, wherein the microwave detection device is provided with a first detection mode and a second detection mode, wherein in the first detection mode, the microwave detection device obtains a detection result of the existence of the human body based on independent detection of activity existence characteristics corresponding to the movement of the human body, and in the second detection mode, the microwave detection device obtains a detection result of the existence of the human body based on independent detection of static existence characteristics corresponding to the heartbeat and/or respiratory micro actions of the human body, so that the detection of the human body actions including the heartbeat and/or respiratory micro actions of the human body can be realized, and the accurate detection of the existence of the human body can be ensured.

Specifically, the microwave detection device feeds back the activity existence characteristic corresponding to the human body movement action in a first mode Doppler intermediate frequency signal in the first detection mode so as to guarantee the instant feedback of the corresponding detection result on the existence of the human body, detects the trans-regional action of the human body in the target detection region in the direction perpendicular to the detection direction of the microwave detection device by an infrared pyroelectric sensor (PIR) based on the division of a target detection region in the direction perpendicular to the detection direction of the Fresnel lens, so as to compensate the low-responsiveness defect of the activity existence characteristic of the first mode Doppler intermediate frequency signal in the direction perpendicular to the detection direction of the microwave detection device, and feeds back the static existence characteristic corresponding to the human body heartbeat and/or respiratory micro-motion in a fluctuation signal in the second detection mode, so as to respectively provide the activity existence characteristic corresponding to the human body movement action and the human body heartbeat and/or respiratory micro-motion static existence characteristic corresponding to the human body movement action The detection of the human body actions including the human heartbeat and/or the respiratory micro-actions is realized by detecting the static existing characteristics corresponding to the respiratory micro-actions.

Further, in the first detection mode, the microwave detection device is excited by a first mode excitation signal to emit a first mode microwave beam corresponding to the frequency of the first mode excitation signal, and receives a first mode reflection echo formed by the first mode microwave beam reflected by a corresponding object to generate a corresponding first mode echo signal, and generates the first mode doppler intermediate frequency signal corresponding to the frequency or phase difference between the first mode excitation signal and the first mode echo signal in a mixed detection manner based on the doppler effect principle, wherein the amplitude of the first mode doppler intermediate frequency signal is directly related to the energy magnitude of the reflection echo formed by the reflection of the moving object and the frequency or phase difference magnitude of the corresponding echo signal and the first mode excitation signal, and the amplitude of the corresponding first mode doppler intermediate frequency signal is proportional to the moving reflecting surface area and the moving reflecting surface area of the corresponding object A moving velocity and inversely proportional to the distance of the object between the detection direction of the microwave detection device and the microwave detection device, wherein the degree of influence of the change in the moving reflecting surface area and the moving velocity of the respective object on the amplitude of the first-mode doppler intermediate frequency signal is attenuated in such a manner that the moving reflecting surface area of the respective object is equivalently substantially reduced, the inversely proportional ratio of the amplitude of the first-mode doppler intermediate frequency signal to the distance of the object between the detection direction of the microwave detection device and the microwave detection device is relatively increased, a definition corresponding mainly to the detection distance of the presence of activity is set for a corresponding threshold value for the amplitude of the first-mode doppler intermediate frequency signal, and the attenuation caused by the penetrating behavior and the reflecting behavior of the microwave based on the penetrating characteristic and the reflecting characteristic is equivalent to the reduction in the detection distance, that is, the activity presence feature of the non-target detection region diffused based on the penetration characteristic and the reflection characteristic of the microwave has a relatively low amplitude in the first mode doppler intermediate frequency signal, thereby allowing the shielding based on the corresponding threshold setting for the amplitude of the first mode doppler intermediate frequency signal, so that the effective detection space of the microwave detection device for the activity presence feature based on the first mode doppler intermediate frequency signal can be precisely defined according to the corresponding threshold setting to match with the corresponding target detection region, thereby eliminating the environmental interference of the non-target detection region, such as the activity presence feature of the non-target detection region diffused and reflected/diffused based on the penetration characteristic and the reflection characteristic of the microwave.

In addition, by equivalently and greatly reducing the area of the motion reflecting surface of the corresponding object, the amplitude span corresponding to the motion existence feature corresponding to the human body motion in the first mode doppler intermediate frequency signal is narrowed and the amplitude corresponding to the environmental micromotion is reduced, so that the environmental micromotion interference of an effective detection space can be eliminated according to the corresponding threshold setting based on the amplitude span corresponding to the motion existence feature in the first mode doppler intermediate frequency signal, namely, the relevance between the first mode doppler intermediate frequency signal and the motion existence feature in the target detection area is improved, the motion existence feature corresponding to the human body motion in the target detection area can be accurately fed back, and the environmental micromotion interference of the target detection area can be eliminated.

Specifically, the duty ratio of the first mode excitation signal is set, specifically, the first mode excitation signal is set to be an intermittent signal with a pulse working time less than 1 second and a duty ratio less than 10%, so as to form an intermittent emission of the microwave detection device to the first mode microwave beam to form an equivalent reduction of the area of the moving reflecting surface of the corresponding object, thereby being beneficial to eliminating the environmental micro-motion interference of an effective detection space and forming an accurate definition of the effective detection space of an activity presence characteristic based on the threshold setting of the first mode doppler intermediate frequency signal, namely resisting the environmental micro-motion interference outside a target detection area and the environmental micro-motion interference of the target detection area in a state that the effective detection space of the activity presence characteristic is matched with the corresponding target detection area.

It is worth mentioning that by further reducing the amplitude of the first mode excitation signal, such as for successive signal states, or a reduction in the amplitude of the first mode excitation signal for intermittent signal conditions (not limited to intermittent signal conditions satisfying the above duty cycle settings), the base intensity of the first mode microwave beam is reduced, the energy corresponding to the reflected echo is reduced, the correlation between the frequency or phase difference value of the echo signal and the first mode excitation signal and the amplitude of the first mode Doppler intermediate frequency signal is improved, so as to improve the correlation degree of the first mode Doppler intermediate frequency signal and the activity existing characteristic in the target detection area and eliminate the environmental micro-motion interference of the target detection area, and then the activity existence characteristics corresponding to the human body movement in the target detection area are accurately fed back.

It is further worth mentioning that, based on the doppler effect principle, the amplitude of the first mode doppler intermediate frequency signal is related to the moving speed of the moving object in the detection direction of the microwave detection device, i.e. the first mode doppler intermediate frequency signal has a low responsiveness to the presence of an activity perpendicular to the detection direction of the microwave detection device, and is further reduced based on the duty cycle setting of the first mode excitation signal and the reduction of the amplitude of the first mode excitation signal, the detection sensitivity of the microwave detection device corresponding to the presence of an activity perpendicular to the detection direction of the microwave detection device is lower, wherein to compensate the detection sensitivity of the microwave detection device to the presence of an activity perpendicular to the detection direction of the microwave detection device, the microwave detection device in the first detection mode is further based on a fresnel lens to the detection target detection area in the detection direction perpendicular to the detection direction of the microwave detection device And in the area division, an infrared pyroelectric sensor (PIR) is used for detecting the cross-area action of the human body in the target detection area in the direction vertical to the detection direction of the microwave detection device, so that the detection sensitivity of the microwave detection device to the activity existence characteristic in the target detection area is improved, and the accurate detection of the activity existence characteristic corresponding to the movement action of the human body in the target detection area is facilitated.

Further, in the second detection mode, the microwave detection apparatus is excited by a second mode excitation signal to emit a second mode microwave beam corresponding to the frequency of the second mode excitation signal, and receives a second mode reflection echo formed by the second mode microwave beam reflected by a corresponding object to generate a corresponding second mode echo signal, and generates a second mode doppler intermediate frequency signal corresponding to the frequency or phase difference between the second mode excitation signal and the second mode echo signal in a frequency mixing detection manner based on the doppler effect principle, and converts the second mode doppler intermediate frequency signal into the fluctuation signal based on the change of the frequency/amplitude of the second mode doppler intermediate frequency signal with time, that is, the fluctuation signal is the change of the frequency/amplitude of the second mode doppler intermediate frequency signal with time, the fluctuation of the amplitude of the fluctuation signal corresponds to the fluctuation of the motion speed of the corresponding object with time, corresponding to an action that the relative speed of the human body tends to zero from beginning to end when the corresponding object is a human body and the human body action is represented by the fluctuation signal, namely the fluctuation frequency of the fluctuation signal in the amplitude corresponds to the frequency of the corresponding action, so that when the fluctuation signal in a specific frequency range in the fluctuation signal is selected by filtering to correspond to the human body action of feeding back the specific frequency range, in particular when the specific frequency range is in the frequency range smaller than 50Hz, the specific frequency range is at the extremely low frequency of electromagnetic silence, the fluctuation signal corresponding to the specific frequency range is at the extremely low frequency, and the high-magnification amplification of the fluctuation signal in the specific frequency range does not affect the fluctuation signal accuracy of the specific frequency range, the corresponding fluctuation in the fluctuation signal corresponding to the human body static existence characteristic in the specific frequency range is allowed to be identified in a high-magnification mode, so that independent accurate detection of the static existence characteristic corresponding to the human body heartbeat and/or respiratory micro-motion is realized based on selection of the specific frequency range to eliminate environmental interference of an effective detection space.

It is worth mentioning that when the fluctuating signal of the specific frequency range in the fluctuating signal is selected in analog filtering, the corresponding analog filtering circuit is configured as an analog filter including a combination of a capacitor, a resistor, an inductor and an integrated filtering circuit, wherein the type of the analog filter is not limited, and the analog filter may be selected from a low-pass filter composed of one or a combination of LC and RC, a high-pass filter, a band-stop filter, a dielectric filter, an active filter, a passive filter or a combination of one or more other analog filters known to those skilled in the art; upon digitally filtering the fluctuating signal of the particular frequency range in the fluctuating signal, the respective digital filtering circuit is configured as a digital low-pass filter including an ADC conversion module, a central processor, and a DAC conversion module, wherein the ADC conversion module, the central processor, and the DAC conversion module are communicatively connected to each other, the central processor providing a hardware environment for running digital filter algorithms; or, the ADC conversion module and the DAC conversion module are built in the central processing unit. Those skilled in the art will appreciate that the specific hardware configuration and algorithm of the digital filter is not limited, for example, but not limited to, the digital filter is configured as one or more of an MCU, a DSP, an FPGA, an external high-precision ADC integrated chip, a digital logic unit chip with an operational amplifier or a combination of chips known to those skilled in the art, wherein the corresponding algorithm includes, but is not limited to, one or more of a Butterworth Filter algorithm, a fourier (FFT/DFT) algorithm, a Kalman Filter (Kalman Filter) algorithm, a finite impulse response Filter, a non-recursive Filter (FIR) algorithm, a hilbert-yellow transform (HHT), a linear system transform, a wavelet transform, an infinite impulse response Filter, a recursive Filter (IIR) algorithm, or algorithms known to those skilled in the art.

It is also worth mentioning that, under the same distance limitation, the amplitude of the respective fluctuation signal is directly related to the motion amplitude of the human body, wherein the respective threshold setting for the amplitude of the fluctuation signal mainly corresponds to the definition of the detection distance for the static presence feature due to the relatively narrow amplitude span of the heartbeat-and/or respiration-like micro-motions of the human body, corresponding to the narrow amplitude span of the amplitude of the fluctuation signal, and the attenuation of the microwaves due to the penetration behavior and the reflection behavior of the microwaves based on the penetration characteristic and the reflection characteristic is equivalent to the reduction in the detection distance, i.e., the static presence feature of the non-target detection region diffused based on the penetration characteristic and the reflection characteristic of the microwaves has a relatively low fluctuation amplitude in the fluctuation signal, thereby allowing the shielding based on the respective threshold setting for the amplitude of the fluctuation signal, so that the microwave detection device effectively detects the static presence feature based on the fluctuation signal at a very low frequency The time interval can be accurately defined according to corresponding threshold value setting and is matched with a corresponding target detection area, so that the environmental interference of a non-target detection area, such as the environmental interference of the non-target detection area formed by wall penetration diffusion and reflection/diffusion based on the penetration characteristic and the reflection characteristic of microwaves, is eliminated, namely, the relevance of the fluctuation signal and the static existence characteristic in the target detection area is improved, and the static existence characteristic corresponding to the human heartbeat and/or respiration micro-motion in the target detection area can be accurately fed back.

That is, the microwave detecting device feeds back an activity existence characteristic corresponding to a movement of a human body with the first mode doppler intermediate frequency signal in the first detection mode based on the doppler effect principle, and detects a transregional action of the human body in the target detection region in a direction perpendicular to the detection direction of the microwave detecting device with an infrared pyroelectric sensor (PIR) based on a division of the target detection region with a fresnel lens in a direction perpendicular to the detection direction of the microwave detecting device, thereby compensating for a low responsivity defect of the first mode doppler intermediate frequency signal to the activity existence characteristic in the direction perpendicular to the detection direction of the microwave detecting device, and independently feeds back a static existence characteristic corresponding to a micro-motion of heartbeat and/or respiration type of the human body with the fluctuation signal in the second detection mode, such that the first mode excitation signal and the second mode excitation signal are based on a prior art bottleneck and for the purpose of avoiding interference The state of being limited by the same frequency, for example, the state that the first mode excitation signal and the second mode excitation signal are in the same ISM frequency band in the C-band and the X-band frequency ranges, specifically, taking an ISM of 5.8Ghz as an example, the diffraction requirement of the second mode microwave beam is met, the static existing feature is detected according to different states and postures of the human body (for example, the state that the human body is covered by thick clothes and the posture that the human body backs on the microwave detection device), and meanwhile, by setting the duty ratio of the first mode excitation signal, converting the second mode doppler intermediate frequency signal and selecting the fluctuation signal in the specific frequency range, the interference of the wall-through/glass behavior of the first mode microwave beam and the second mode microwave beam based on the stronger penetration characteristic on the corresponding detection result is suppressed, so as to ensure that the corresponding detection result and the target detection area include the heartbeat and/breathing micromotion type of the human body The accurate detection of the existence of the human body is realized by the relevance of the action of the human body.

It is understood that the narrower the specific frequency range, the lower the ambient motion with motion frequency in the specific frequency range, the lower the interference probability of the corresponding ambient motion on the fluctuation signal, therefore, to further improve the correlation degree of the fluctuation signal of the specific frequency range and the human heartbeat and/or respiratory micro-motion, so as to ensure the accuracy of the feedback of the vital signs corresponding to the human heartbeat and/or respiratory micro-motion by the fluctuation signal of the specific frequency range, the specific frequency range is preferably set in a very low frequency range less than 1Hz, wherein since the frequency of the human respiratory motion is generally less than or equal to 1Hz, i.e. the number of respiratory motions per second is less than 1, and the fluctuation frequency corresponding to the human respiratory motion in the fluctuation signal is less than or equal to 1Hz, by setting the specific frequency range in a very low frequency range less than or equal to 1Hz, the specific frequency range is narrowed, wherein the interference probability of the corresponding environmental action on the fluctuation signal is reduced because the environmental action with the action frequency less than or equal to 1Hz is less, the association degree of the fluctuation signal and the human respiration micro action in the specific frequency range is improved, and the amplitude of the fluctuation signal in the specific frequency range is ensured because the action amplitude of the human respiration micro action is far higher than the action amplitude of the human heartbeat action, so that the association degree of the fluctuation signal and the human respiration micro action in the specific frequency range is improved, and the strength of the fluctuation signal is ensured, thereby being beneficial to improving the accuracy of the feedback of the fluctuation signal in the specific frequency range on the vital signs corresponding to the human respiration micro action.

Therefore, based on the duty ratio setting of the first mode excitation signal, the conversion of the second mode doppler intermediate frequency signal and the selection of the fluctuation signal in the specific frequency range, the activity existence characteristic corresponding to the movement action of the human body is fed back by the first mode doppler intermediate frequency signal, and the static existence characteristic corresponding to the heartbeat and/or respiratory type micro action of the human body is independently fed back by the fluctuation signal, and the correlation degree of the first mode doppler intermediate frequency signal and the activity existence characteristic in the target detection area and the correlation degree of the fluctuation signal and the static existence characteristic in the target detection area can be respectively improved to improve the reliability of the detection of the existence or non-existence of the human body.

In addition, the state of the human body in the target detection area can be judged simultaneously according to the detection of the human body activity existence characteristic and the static existence characteristic based on the corresponding judgment rule, so that the intelligent application of the microwave detection device is facilitated.

Specifically, referring to fig. 1 of the drawings accompanying the description of the present invention, a block diagram of the structure of the microwave detection device according to an embodiment of the present invention is illustrated, wherein in this embodiment of the present invention, the microwave detection device comprises a first microwave detection module 20, a second microwave detection module 30, an infrared pyroelectric sensor (PIR)60 and a processor module 10, wherein in the first detection mode, the first microwave detection module 20 is fed by the first mode excitation signal to emit a microwave beam corresponding to the frequency of the first mode excitation signal, wherein the first mode excitation signal is set as an intermittent signal having a pulse duty time of less than 1 second and a duty cycle of less than 10%, and the infrared pyroelectric sensor (PIR)60 detects a partition of the target detection area based on a fresnel lens in a detection direction perpendicular to the detection direction of the microwave detection device for the partition of the target detection area of a human body in the target detection area perpendicular to the micro-micro detection area A cross-zone action of a detection direction of a wave detection device, thereby compensating for a low responsivity deficiency of the first mode Doppler intermediate frequency signal characteristic of an activity presence perpendicular to the detection direction of the microwave detection device, wherein in the second detection mode the second mode detection module 30 is fed by the second mode excitation signal to emit a microwave beam of a frequency corresponding to the second mode excitation signal, wherein the processor module 10 is communicatively connected to the first and second microwave detection modules 20, 30 and the infrared pyroelectric sensor (PIR)60 to output the first and second mode excitation signals to the first and second microwave detection modules 20, 30, respectively, and to receive feedback of the infrared pyroelectric sensor (PIR)60 on the human activity presence characteristic within the target detection area, in which the mixed detection processing of the first mode excitation signal and the first mode echo signal is processed by the processor module 10 or the first microwave detection module 20, which is not limited by the present invention, and in the same way, the mixed detection processing of the second mode excitation signal and the second mode echo signal, the conversion processing of the second mode doppler intermediate frequency signal, and the frequency selection processing of the fluctuation signal are processed by the processor module 10 and/or the second microwave detection module 30, which is not limited by the present invention.

Preferably, the second mode excitation signal is set to be a continuous signal or an intermittent signal with a pulse working time of more than or equal to 1 second or more than or equal to 10% duty ratio, so that the feedback accuracy of the fluctuation signal to the static existence characteristic is guaranteed in an application scene with a large angle detection requirement. That is, in some embodiments of the present invention, in an application scenario where a small angle detection requirement is required, such as a detection scenario of static existence characteristics of a small area, such as a hand washing table, a table top, and a bed, the duty cycle requirement of the second mode excitation signal in a pulse form is allowed to be further reduced to reduce the power consumption of the microwave detection apparatus in the second detection mode, which is not limited by the present invention.

It is worth mentioning that, based on the low-frequency characteristic of the motion frequency of the human heartbeat and/or respiratory micro-motion, the specific frequency range is in an extremely low frequency range smaller than 50Hz, and if the frequency of the human respiratory motion is generally smaller than 1Hz, i.e. the number of respiratory motions per second is less than 1, the fluctuation frequency corresponding to the human respiratory motion in the fluctuation signal is smaller than 1Hz, i.e. the fluctuation signal in the specific frequency range is an extremely low-frequency signal and has a time delay when identifying the fluctuation frequency of the fluctuation signal in amplitude, so that the fluctuation signal has a time delay for the feedback of the static existing characteristics corresponding to the human heartbeat and/or respiratory micro-motion and cannot be applied to the instant control of the corresponding electrical equipment based on the corresponding detection result, such as the instant closing control of the UV germicidal lamp based on the human body entering the target detection area, that is to say, whether a human body exists in a target detection area can be independently and accurately fed back based on the feedback of the fluctuation signal to the heartbeat and/or the breathing micro-action of the human body, and meanwhile, the instant feedback of the first mode Doppler intermediate frequency signal to the activity existence characteristic can ensure the instant feedback of the microwave detection device to the existence of the human body, so that the applicability of the microwave detection device can be improved, and the intelligent control experience can be improved.

In particular, the microwave detection device is advantageous to reduce the total power consumption of the microwave detection device based on the detection power consumption of the activity presence characteristic of the first mode doppler intermediate frequency signal to the target detection region being reduced based on the above duty cycle setting of the first mode excitation signal or the manner of reducing the amplitude of the first mode excitation signal, and is particularly characterized in that the processor module 10 is in a state of independently outputting the first mode excitation signal, the supply terminal current of the processor module is I1, and the processor module 10 is in a state of independently outputting the second mode excitation signal, the supply terminal current of the processor module is I2, wherein I1: I2 ≦ 1:2, and preferably I1: I2 ≦ 1:10, that is, based on the duty cycle and amplitude setting of the first mode excitation signal, the first mode excitation signal may be configured as an intermittent signal having a low duty cycle, or a low amplitude of the first mode excitation signal, Or intermittent signals with low duty cycle and intermittent output, or intermittent or continuous signals with low amplitude values, characterized by I1: I2 ≦ 1:2, respectively.

It is worth mentioning that, based on the low power consumption characteristic of the infrared pyroelectric sensor (PIR)60, when the motion existence characteristic corresponding to the motion of the human body is fed back by the first mode doppler intermediate frequency signal and the cross-zone motion of the human body in the target detection area in the direction perpendicular to the detection direction of the microwave detection device is detected by the infrared pyroelectric sensor (PIR)60 to compensate the low responsiveness defect of the first mode doppler intermediate frequency signal to the motion existence characteristic perpendicular to the detection direction of the microwave detection device, the low power consumption characteristic of the detection of the motion existence characteristic of the target detection area by the microwave detection device can be maintained to facilitate the reduction of the total power consumption of the microwave detection device.

Further, the microwave detection device uses the first microwave detection module 20 to detect the activity existence feature corresponding to the movement of the human body, uses the infrared pyroelectric sensor (PIR)60 to detect the transregional action of the human body in the target detection region in the direction perpendicular to the detection direction of the microwave detection device so as to compensate the defect of low responsivity of the first microwave detection module 20 to the activity existence feature perpendicular to the detection direction of the microwave detection device, and uses the detection results of the first microwave detection module 20 and the infrared pyroelectric sensor (PIR)60 to the activity existence feature of the target detection region to trigger the detection of the static existence feature corresponding to the heartbeat and/or respiratory type micromotion of the human body by the second microwave detection module 30 according to the corresponding trigger rules, so as to realize the corresponding application scenarios, the average power consumption of the microwave detection device is reduced, the accuracy of a detection result of the microwave detection device is guaranteed, and the situation mode of the electrical equipment is intelligently controlled based on the detection result of whether the human body exists in the target detection area or not and the judgment of the behavior state of the human body in the target detection area when the state that the human body exists in the target detection area is detected.

Specifically, corresponding to fig. 2A and fig. 2B, an operation logic of the microwave detection device according to the above embodiment of the present invention is illustrated, and correspondingly, after the microwave detection device detects the detection result of the active presence characteristic in the target detection region based on the first detection mode, that is, after the first microwave detection module 20 and/or the infrared pyroelectric sensor (PIR)60 detects the active presence characteristic, the second microwave detection module 30 further detects the static presence characteristic corresponding to the heartbeat and/or respiration type micro-motion of the human body, so as to ensure the accuracy of the detection result of the human body in the target detection region based on the detection result of the static presence characteristic, and is beneficial for practical applications, especially in practical application scenarios where the human body is small in probability/short in existence, the detection frequency of the static existence characteristics corresponding to the heartbeat and/or breathing type micro-motions of the human body is reduced, and the average power consumption of the microwave detection device is reduced.

Further, the microwave detection device triggers the timing of the time duration T1 based on the detection result of the first detection mode detecting the presence of the active presence feature in the target detection region, and enters the second detection mode at least once within the time duration T1 to continue the timing of the time duration T1 based on the detection result of the presence of the static presence feature in the target detection region forming a continuation condition for the time duration T1 within the time duration T1, including but not limited to resetting the timing of the time duration T1 with the current time node as a timing start point, and resetting the time duration T1 with a time node after the time duration T1 as a timing start point, so as to ensure the accuracy of the detection result of the presence of a human body in the target detection region based on the detection result of the obtained static presence feature, while facilitating the reduction of the frequency of the detection of the static presence feature corresponding to the heartbeat and/or respiratory type inching of the human body in practical application, especially in the practical application scenario where the human body is small in probability/transient presence And then the average power consumption of the microwave detection device is reduced.

Preferably, the microwave detection device triggers the timing of a time period T1 based on the detection result of the first detection mode detecting the presence of the active presence feature in the target detection region, and delays the entering of the second detection mode for a time period T1, so as to reduce the detection frequency of the static presence feature corresponding to the heartbeat and/or respiratory type micro-motion of the human body and reduce the average power consumption of the microwave detection device.

That is, the microwave detection device operates in the first detection mode after being powered on to detect an activity presence characteristic corresponding to a human body movement action with the first microwave detection module 20, and to detect a trans-regional action of a human body in the target detection region perpendicular to a detection direction of the microwave detection device with the infrared pyroelectric sensor (PIR)60 to compensate for a low-responsiveness defect of the first microwave detection module 20 to an activity presence characteristic perpendicular to the detection direction of the microwave detection device, wherein when the microwave detection device detects the activity presence characteristic of the target detection region based on the first detection mode, that is, when the first microwave detection module 20 and/or the infrared pyroelectric sensor (PIR)60 detects the activity presence characteristic, the processor module 10 is triggered to time a period T1, and entering the second detection mode at least once for a duration of T1, i.e., waking up/activating the second microwave detection module 30 at least once for a duration of T1, and preferably delaying waking up/activating the second microwave detection module 30 for a duration of T1, to form a delay condition for a duration of T1 to trigger the processor module 10 to delay the timing of the duration of T1 based on the detection result of the presence of the static presence feature in the target detection region.

In particular, in view of the fact that the movement of the human body must be formed in response to the movement of the human body into or out of the corresponding detection area, i.e. the state that the human body entering the target detection area is in a static existence state or out of the target detection area after the microwave detection device detects the existence of the activity of the target detection area based on the first detection mode until the target detection area does not have the activity of the target detection area within the continuous time period of t1, in order to adapt to the instant control of the corresponding electrical equipment based on the corresponding detection result and simultaneously ensure the accurate detection of the existence or nonexistence of the human body, in another operation logic of the microwave detection device according to the above-mentioned embodiment of the present invention, corresponding to fig. 3A and 3B, the microwave detection device enters the second detection mode at least once only after the detection of the existence of the activity of the target detection area based on the first detection mode until the existence of the activity of the target detection area within the continuous time period of t1 In the second detection mode, the detection result of the static existence characteristic in the target detection region corresponds to the state that the human body entering the target detection region is in a static existence state, and the detection result of the static existence characteristic in the target detection region does not correspond to the state that the human body entering the target detection region is in a state that the human body leaves the target detection region, so that the microwave detection device can immediately respond to the behavior state that the human body enters the target detection region, the accuracy of the detection result of the microwave detection device is guaranteed, and meanwhile, the detection frequency of the static existence characteristic corresponding to the heartbeat and/or breathing micro-motion of the human body is favorably reduced in practical application, and the average power consumption of the microwave detection device is reduced.

That is, the microwave detection device, after being powered on, operates in the first detection mode to detect an activity presence characteristic corresponding to a movement of a human body with the first microwave detection module 20, and to detect a trans-regional action of the human body in the target detection region perpendicular to a detection direction of the microwave detection device with the infrared pyroelectric sensor (PIR)60 to compensate a low responsiveness defect of the first microwave detection module 20 to the activity presence characteristic perpendicular to the detection direction of the microwave detection device, wherein when the microwave detection device detects the activity presence characteristic in the target detection region based on the first detection mode, that is, when the first microwave detection module 20 and/or the infrared pyroelectric sensor (PIR)60 detects the activity presence characteristic, the corresponding human body enters the target detection region in an active state, and subsequently, when the microwave detection device detects that the target detection region does not have the activity presence characteristic for a continuous time period of t1 based on the first detection mode, the microwave detection device corresponds to the detection result that the human body has the static presence characteristic in the target detection region in a static state in the target detection region based on the second detection mode, and corresponds to the detection result that the human body entering the target detection region has no static presence characteristic in the target detection region in a state of leaving the target detection region.

Specifically, when the microwave detection apparatus obtains the detection result of the presence of the active presence feature in the target detection region based on the first detection mode, it triggers the processor module 10 to time t1 duration, and forms a time-delay condition for time t1 duration based on the detection result of the presence of the active presence feature in the target detection region within time t1, triggers the processor module 10 to time t1 duration (including but not limited to resetting the time t1 duration with the current time node as a timing starting point, and resetting the time t1 duration with the time node after the time t1 duration as a timing starting point), and after the time t1 duration is ended by the processor module 10 (corresponding to the time-delay condition for time t1 duration not being formed based on the detection result of the absence of the active presence feature in the target detection region within time-delay t1 duration), the second microwave detection module 30 is awakened/started at least once under the control of the processor module 10 to enter the second detection mode That is, only in the case that all the human bodies entering the target detection area leave the target detection area and in the case that all the human bodies entering the target detection area remain static for a time period exceeding t1, the microwave detection apparatus enters the second detection mode, so that for general indoor use scenes, such as indoor use scenes of offices, conference rooms, bedrooms and the like, the situation of entering the second detection mode is limited, so as to reduce the average power consumption of the microwave detection apparatus and ensure the accuracy of the detection result of the microwave detection apparatus.

Further, in the first detection mode, the first microwave detection module 20 preferably detects human body activity in the target detection area with the first mode microwave beam having a pulse duty time of microsecond or less and a duty cycle of less than 1%, to obtain a detection result of whether the active presence feature exists in the target detection area based on the corresponding threshold setting for the first mode doppler intermediate frequency signal, when the microwave detection device further detects the transregional action of the human body in the target detection region in the direction perpendicular to the detection direction of the microwave detection device by the infrared pyroelectric sensor (PIR)60 in the first detection mode, so as to compensate the state of the first microwave detection module 20 with low responsivity defect of the activity in the direction perpendicular to the detection direction of the microwave detection device, thereby realizing the low power consumption state of the microwave detection device in the first detection mode; in the second detection mode, the second mode detection module 30 detects the human body activity including human heartbeat and/or respiratory micro-actions in the target detection area by using the second mode microwave beam in a continuous emission state based on the doppler effect principle, preferably by using the second mode microwave beam with a pulse working time of more than or equal to 1 second or more than or equal to 10% duty ratio, so as to obtain a detection result of whether a static existence characteristic exists in the target detection area by setting a corresponding threshold value for the fluctuation signal, thereby ensuring accurate detection of the existence of the human body and further reducing the average power consumption of the microwave detection apparatus.

Specifically, in the first detection mode, the first microwave detection module 20 of the microwave detection device is fed by the first mode excitation signal, the infrared pyroelectric sensor (PIR)60 is maintained in an operating state to detect a transregional action of a human body in the target detection region perpendicular to the detection direction of the microwave detection device based on a fresnel lens to a subarea of the target detection region perpendicular to the detection direction of the microwave detection device, and in the second detection mode, the second microwave detection module 30 of the microwave detection device is fed by the second mode excitation signal, wherein the second mode excitation signal is set to be a continuous signal or an intermittent signal with a pulse operating time of the order of seconds or a duty cycle of more than 10% to satisfy the detection accuracy of the microwave detection device based on the second microwave detection module 30 to a static presence characteristic corresponding to a heartbeat and/or respiration-like jogging action of the human body Wherein the second mode excitation signal is preferably set to be an intermittent signal with a pulse duty cycle of more than 10% to reduce the power consumption of the second microwave detection module 30 while ensuring detection accuracy of static presence features corresponding to human heartbeat and/or respiratory type micro-motions.

Further, referring to fig. 4, in the second detection mode, the detection of the static existence feature corresponding to the heartbeat and/or respiratory type micromotion of the human body by the microwave detection device based on the doppler effect principle with the second mode microwave beam comprises the following steps:

(a) transmitting said second mode microwave beam corresponding to said second mode excitation signal frequency;

(b) receiving the second mode echo formed by the second mode microwave beam reflected by the corresponding object to generate a corresponding second mode echo signal;

(c) generating the second mode Doppler intermediate frequency signal based on a frequency/phase difference between the second mode excitation signal and the second mode echo signal by means of mixer detection;

(d) converting the second mode doppler intermediate frequency signal into the fluctuation signal based on the change of the frequency/amplitude of the second mode doppler intermediate frequency signal with time, that is, the fluctuation signal is a change signal of the frequency/amplitude of the second mode doppler intermediate frequency signal with time; and

(e) -selecting in a filtered manner the undulation signal of the certain frequency range of the undulation signal, wherein the certain frequency range lies within a frequency range smaller than 50Hz, i.e. the set of certain frequency ranges is a subset of the set of frequency ranges smaller than 50 Hz.

It is to be understood that, in the step (c), the frequency of the second mode doppler intermediate frequency signal corresponds to the movement velocity of the corresponding object, the amplitude of the second mode doppler intermediate frequency signal corresponds to a range of amplitude of the movement of the corresponding object to some extent and also corresponds to the movement velocity of the corresponding object, so that when, in the step (d), the second mode doppler intermediate frequency signal is converted into the fluctuation signal based on the change of the frequency/amplitude of the second mode doppler intermediate frequency signal with time, the fluctuation of the amplitude of the fluctuation signal corresponds to the fluctuation of the movement velocity of the corresponding object with time, and when the corresponding object is a human body and the human body movement is represented by the fluctuation signal, one fluctuation of the amplitude of the fluctuation signal corresponds to an action in which the relative velocity at the beginning and the end of the human body tends to zero, a chest expansion movement caused by the inspiration movement of the human body, i.e. the fluctuation frequency of the fluctuation signal corresponds to the frequency of the corresponding movement, so that in the step (e), since the specific frequency range is in the frequency range smaller than 50Hz and at the electromagnetic silence frequency of very low frequency, the high-magnification amplification of the fluctuation signal of the specific frequency range does not affect the accuracy of the fluctuation signal of the specific frequency range, and the corresponding fluctuation of the fluctuation signal corresponding to the human body static existence characteristic of the specific frequency range is allowed to be identified by means of high-magnification amplification, thereby realizing the detection of the static existence characteristic corresponding to the human body heartbeat and/or breathing type micro movement by microwaves.

That is, the microwave detection device detects an active presence feature based on the Doppler effect principle in the first detection mode with the first mode microwave beam having a pulse on-time of less than 1 second and a duty cycle of less than 10%, and detects a transzone action of a human body within the target detection area in a direction perpendicular to the detection direction of the microwave detection device with the infrared pyroelectric sensor (PIR)60 based on a Fresnel lens for a zone of the target detection area in a direction perpendicular to the detection direction of the microwave detection device, and detects a static presence feature based on the Doppler effect principle in the second mode microwave beam in a continuous emission state or in the second mode microwave beam having a pulse on-time of the order of seconds or a duty cycle of more than 10% in the second detection mode, wherein based on a trigger rule for entering the second detection mode, the average power consumption of the microwave detection device can be reduced, the defect that the state of the human body is easy to be misjudged due to the fact that the static existence characteristic cannot be detected in the first detection mode is avoided, the accurate detection on the existence of the human body can be realized, meanwhile, the interference of the environment action on the detection result of the activity existence characteristic is reduced due to the defect that the static existence characteristic cannot be detected in the first detection mode, the accuracy of the detection on the activity existence characteristic corresponding to the movement action of the human body is improved, the electromagnetic interference is shielded while the interference of the environment action on the static existence characteristic is reduced due to the mode that the second mode Doppler intermediate frequency signal is converted into the fluctuation signal and the fluctuation signal in the specific frequency range in the fluctuation signal is selected in the second detection mode, and the accurate detection on the static existence characteristic is realized, and can accurately define the detection range of the static existence characteristics based on the corresponding threshold setting of the fluctuation signals, and allow the behavior state of the human body in the target detection area to be simultaneously judged according to the detection of the human body activity existence characteristics and the static existence characteristics based on the corresponding judgment rules.

In particular, to further reduce the average power consumption of the microwave detection device while ensuring the detection accuracy of the microwave detection device for the presence or absence of the human body, after the timing of the time duration t1 is ended (corresponding to the detection result of the absence of the active presence feature in the target detection region within the time duration t1 of the time duration does not form the time duration condition of the time duration t 1), the timing of the time duration t2 by the processor module 10 is triggered, wherein the second microwave detection module 30 is awakened/activated at least once within the time duration t2 under the control of the processor module 10 to enter the second detection mode, and exits the second detection mode after the timing of the time duration t2 is ended, or exits the second detection mode based on the detection result of the presence of the static presence feature in the target detection region within the time duration t2, so as to reduce the average power consumption of the microwave detection device and achieve the accurate detection for the presence or absence of the human body based on the cyclic working logic, and simultaneously, the behavior state of the human body in the target detection area is allowed to be judged according to the detection of the human body activity presence characteristic and the static presence characteristic based on the corresponding judgment rule.

Further, in the state of entering the second detection mode, the first detection mode is maintained, and the microwave detection device returns to timing the time duration t1 after acquiring the detection result of the active presence feature of the target detection area based on the first detection mode, and preferably ends timing the time duration t2 to exit the second detection mode, that is, in the cyclic working logic of the microwave detection device, the detection result of the active presence feature of the target detection area has higher priority than the detection result of the static presence feature of the target detection area, and in any time period, the microwave detection device returns to timing the time duration t1 after acquiring the detection result of the active presence feature of the target detection area based on the first detection mode, so as to avoid that the behavior state of the human body in the target detection area leaving the target detection area during the timing of the time duration t2 is misjudged as the behavior state of the target detection area in the static presence of the target detection area In a state, the accuracy of the detection result of the microwave detection device is guaranteed, and the average power consumption of the microwave detection device can be further reduced.

Specifically, in a state that the microwave detection device is connected to a power supply, the processor module 10 is electrically connected to a corresponding power supply, such as a battery or commercial power, the first microwave detection module 20 is communicatively connected to the processor module 10 and is electrically connected to the power supply, such as being electrically connected to the power supply in a state of being directly electrically connected to the power supply, or being electrically connected to the power supply in a state of being electrically connected to the power supply via the processor module 10, wherein the second microwave detection module 30 is communicatively connected to the processor module 10 and is electrically connected to the power supply under the control of the processor module 10, and illustratively, the switch, such as but not limited to an electric control switch, a relay, a triode, a MOS (metal oxide semiconductor) tube, a silicon controlled rectifier and the like, is arranged between the second microwave detection module 30 and the power supply in a state of being controlled by the switch, wherein the switch is electrically connected to the processor module 10 and is controlled by the processor module 10 to be switched on and off.

It should be noted that, in the state that the microwave detection device is connected to the battery, the microwave detection device is preferably configured to be powered by two batteries, specifically, one battery is used to power the infrared pyroelectric sensor 60 and the other battery is used to power the first microwave detection module 20 and the second microwave detection module 30, so as to simplify the circuit design of the microwave detection device based on the dual requirements of the microwave detection device for dc power supply and pulse power supply.

That is, the microwave detection device operates in the first detection mode after being powered on, wherein when the microwave detection device obtains a detection result that the activity presence feature exists in the target detection region in the first detection mode, the processor module 10 triggers timing of a time duration t1 and determines that the human body enters (exists) the target detection region in an active state, wherein in the time duration t1, the processor module 10 continues the timing of a time duration t1 based on a detection result that the activity presence feature exists in the target detection region forming a continuation condition for a time duration t1 and determines that the human body exists in the active state in the target detection region, and subsequently, when the processor module 10 sets, based on a corresponding threshold, the first microwave detection module 20 obtains a detection result that the activity presence feature does not exist in the target detection region for a continuous time duration t1, the processor module 10 triggers timing of a time duration t2 and controls the second microwave detection module 30 to wake up/activate at least once during a time duration t2 to enter the second detection mode, wherein the processor module 10 determines that the human body exists in the target detection region in a static state when the second microwave detection module 30 acquires the detection result that the target detection region has the static existence feature based on the corresponding threshold setting, and judging that the human body entering the target detection area is in a state of leaving the target detection area according to the detection result that the static existence characteristic does not exist in the target detection area, and controlling the second microwave detection module 30 to sleep/shut down to exit the second detection mode after the timing of the time period t2 ends, or control the second microwave detection module 30 to sleep/shut off to exit the second detection mode based on the detection result of the presence of the static presence feature in the target detection region for the duration t 2.

It is worth mentioning that, in the second detection mode, when the processor module 10 acquires the detection result of the presence of the static presence characteristic in the target detection area by the second microwave detection module 30 based on the corresponding threshold setting, it is determined that the human body is present in the target detection area in a static state, and after the timing of the time period t2 is ended, the second microwave detection module 30 is controlled to sleep/shut down, or within the time period t2, the second microwave detection module 30 is controlled to sleep/shut down based on the detection result of the presence of the activity characteristic in the target detection area, and subsequently, when the processor module 10 acquires the detection result of the presence of the activity characteristic in the target detection area by the first microwave detection module 20 based on the corresponding threshold setting, it is determined that the human body is changed from the static state to the active state to be present in the target detection area, so as under the above-mentioned cyclic operation logic, the method comprises the steps of simultaneously judging the behavior state of a human body in a target detection area based on corresponding judgment rules according to the detection of human body activity presence characteristics and static presence characteristics, such as the behavior state of entering (existing) the target detection area in an activity state, the behavior state of existing in the target detection area in a static state, the behavior state of existing in the target detection area in an activity state from the static state, and the behavior state of leaving the target detection area.

It will be appreciated that the first microwave detection module 20 detects the presence of an activity based on the doppler principle with microwaves pulsed on for less than 1 second and with a duty cycle of less than 10%, the higher the accuracy of the first microwave detection module 20, the more likely it is to reduce the trigger frequency of the processor module 10 timing the duration of t2, which is advantageous in reducing the average power consumption of the microwave detection apparatus, the first microwave detection module 20 has a lower operating current, but the detection precision of the infrared pyroelectric sensor (PIR)60 and the detection precision of the infrared pyroelectric sensor cannot meet the detection of human body existence in a static state, by entering and exiting the second detection mode according to the above-mentioned cyclic working logic, the average power consumption of the microwave detection device can be reduced while the stability of the detection result of the microwave detection device is guaranteed.

That is, the microwave detection device detects the active presence feature based on doppler effect principle in the first detection mode by the microwave with pulse working time less than 1 second and duty ratio less than 10%, and detects the cross-zone action of the human body in the target detection area in the direction perpendicular to the detection direction of the microwave detection device by the infrared pyroelectric sensor (PIR)60 based on fresnel lens to the zone of the target detection area in the direction perpendicular to the detection direction of the microwave detection device, and detects the static presence feature based on doppler effect principle in the second detection mode by the second mode microwave beam continuously emitting state, or by the second mode microwave beam with pulse working time greater than or equal to 1 second or greater than or equal to 10% duty ratio, thereby avoiding the defect that the state of the human body presence is easily misjudged due to the failure to detect the static presence feature in the first detection mode, and the method also utilizes the defect that the first detection mode can not detect the static existence characteristics to reduce the interference of the environment action on the detection result of the activity existence characteristics, thereby improving the detection accuracy of the activity existence characteristics corresponding to the movement action of the human body, and simultaneously, based on the start and the close of the second detection mode according to the circulating working logic, the average power consumption of the microwave detection device can be reduced, the accurate detection on the existence or not of the human body can be realized, and the state of the human body in the target detection area can be judged based on the corresponding judgment rule according to the detection on the activity existence characteristics and the static existence characteristics of the human body.

Further, the timing of the duration of t2 by the processor module 10 is optionally triggered by a delay, i.e., after the processor module 10 times the duration of t1, the delay triggers the timing of the duration of t2, so as to avoid the frequent triggering of the timing of the time length t2 by the transient static state and the frequent in and out behavior of the human body in the target detection area through the delayed triggering of the timing of the time length t2, that is, during the time delay, after the microwave detection apparatus acquires the detection result that the activity existence feature exists in the target detection area in the first detection mode, the processor module 10 triggers the timing of the time duration t1, the average power consumption of the microwave detection means is further reduced by correspondingly avoiding frequent triggering of entering the second detection mode, and the time duration of t1 can be kept for a proper time length to ensure the microwave detection device to timely feed back the human behavior state based on the first detection mode.

It is worth mentioning that, based on the above timing triggering rule for the time duration t2, corresponding to the case that all the human bodies entering the target detection area leave the target detection area and the case that all the human bodies entering the target detection area remain static for the time duration exceeding t1, the microwave detection device will enter the second detection mode, so that the setting of the time duration t1 is prolonged to avoid frequent triggering of the timing for the time duration t2 and to reduce the average power consumption of the microwave detection device, whereas the setting of the time duration t1 is too long to facilitate the microwave detection device to feed back the activity state of the human body in time based on the first detection mode and to fail to realize real-time control over the corresponding electrical equipment based on the behavior state of the human body, and therefore, in this embodiment of the present invention, the time duration t1 is preferably set to be greater than or equal to 5 seconds, so as to ensure that the microwave detection device feeds back the behavior state of the human body in time based on the first detection mode The method is beneficial to reducing the frequent triggering of the second detection mode and reducing the average power consumption of the microwave detection device.

Further, the time period t2 is preferably set to be less than or equal to 1 minute, so as to ensure the accuracy of the detection result of the microwave detection device for the presence or absence of the human body in the target detection area in the second detection mode while reducing the average power consumption of the microwave detection device, then the microwave detection means has an operating current of 100uA in the first detection mode, and an operating current of 25mA in the second detection mode, when the time period t2 is set to a state of 10 seconds, even if the activation of the second detection mode is triggered 60 times every 24 hours, for example, the microwave detection device has an average operating current of 273uA, that is, in the case of a battery having a capacity of 3000mAh, in a state where the microwave detecting device uses the battery as a power source, the microwave detection device could theoretically operate for 457 days and thus be adapted to battery power without the need for frequent battery recharging or replacement.

In particular, in this embodiment of the present invention, the microwave detection device controls the operating state of at least one electrical device 100 based on the determination result of the presence or absence of the human body in the target detection area, such as controlling a lamp to be in an illumination state based on the determination result of the presence of the human body in the target detection area and controlling the lamp to be in an off state based on the determination result of the absence of the human body in the target detection area, so as to achieve intelligent control over the electrical device 100 based on the determination result of the presence or absence of the human body in the target detection area.

Further, the microwave detection apparatus further controls the operating state of the electrical device 100 based on the determination of the behavior state of the human body in the target detection area, for example, based on the behavior state that the human body enters (exists) the target detection area in an active state, the behavior state that the human body exists in the target detection area in a static state, the behavior state that the human body changes from the static state to the behavior state that the human body exists in the target detection area in an active state, and the behavior state that the human body leaves the target detection area controls the corresponding electrical device 100 to realize the adjustment of the environmental parameters such as the ambient light, the humidity, the temperature, and the like, thereby realizing the intelligent control of the electrical device 100.

It can be understood that the electrical device 100 may be implemented as one of a lamp, an air conditioner, a fresh air system, an exhaust fan, a sound system, a humidifier, an aromatherapy machine, an intelligent curtain, a television, and an electric door lock, and the number of the electrical devices 100 is not limited, so as to implement the combined control of the corresponding working states of different electrical devices 100 to implement the intelligent context control based on the judgment of the behavior state of the human body in the target detection area.

Illustratively, in some embodiments of the present invention, the electrical apparatus 100 is implemented as a UV germicidal lamp, wherein the presence detection control apparatus controls the turning on of the UV germicidal lamp based on a behavior state in which a human body leaves the target detection area, and controls the turning off of the UV germicidal lamp based on a behavior state in which a human body enters (exists) the target detection area in an active state, and maintains the UV germicidal lamp in an off state based on a behavior state in which a human body exists in the target detection area in an active state, and a behavior state in which a human body exists in the target detection area in a static state.

Therefore, in this embodiment of the present invention, the microwave detection apparatus further includes a wireless module 40, wherein in the state that the microwave detection apparatus is connected to the power supply, the wireless module 40 is electrically connected to the corresponding power supply and is communicatively connected to the processor module 10, wherein the microwave detection apparatus controls the working state of the electrical device 100 through the wireless module 40 based on the determination result of the presence or absence and/or behavior state of the human body in the target detection area, so that the microwave detection apparatus is suitable for wirelessly networking with the corresponding electrical device 100 or other microwave detection apparatuses, thereby facilitating the simplification of the installation and maintenance of the microwave detection apparatus and realizing the intelligent application scenario of the microwave detection apparatus.

In particular, as mentioned above, in the second detection mode, the microwave detection apparatus detects the static existence feature corresponding to the heartbeat and/or respiration micro motion of the human body with the microwave having the pulse duty time less than 1 second and the duty ratio less than 10% by the second microwave detection module 30 based on the doppler effect principle, wherein the detection range of the static existence feature by the microwave based on the doppler effect principle can be precisely defined according to the corresponding threshold setting of the fluctuation signal, i.e. the detection range of the static existence feature by the microwave detection apparatus can be precisely controlled and distinguished from the detection range of the active existence feature, and allows the detection range of the active existence feature and the detection range of the static existence feature to be set according to the set relation of the detection range of the active existence feature and the detection range of the static existence feature (e.g. the detection range of the static existence feature is included in the set relation of the detection range of the active existence feature, or the detection range of the static existence characteristic and the detection range of the activity existence characteristic are in an overlapped set relationship, or the detection range of the static existence characteristic and the detection range of the activity existence characteristic are in an intersected set relationship, or the detection range of the static existence characteristic and the detection range of the activity existence characteristic are not in an intersected set relationship), and the detection results of the human activity existence characteristic and the static existence characteristic realize the judgment of the human existence position and further refine the judgment of the human behavior state so as to be suitable for the intelligent control of different application scenes.

Illustratively, as shown in fig. 6, in some embodiments of the present invention, based on the control of the detection range of the active presence characteristic and the detection range of the static presence characteristic, the detection range of the static presence characteristic is smaller than the detection range of the active presence characteristic and is included in the detection range of the active presence characteristic, the microwave detection device is applied to the state of the indoor environment, such as the state of being applied to the indoor environment of a bedroom, a living room, an office, etc., based on the control of the corresponding electrical device 100, the detection range of the static presence characteristic corresponds to the region where the human body has a high probability of being present statically, such as the region of a bed, a sofa, and a desk, wherein the interference of the environmental factors in the detection range of the active presence characteristic on the detection result of the static presence characteristic can be reduced because the detection range of the static presence characteristic is smaller than the detection range of the active presence characteristic, thereby being beneficial to improving the accuracy of the microwave detection device.

For further understanding of the present invention, referring to fig. 7A and 7B of the drawings accompanying the description of the present invention, a structural block diagram and a part of an operation logic of the microwave detection apparatus according to a modified embodiment of the present invention are illustrated, and specifically, unlike the microwave detection apparatus of the above embodiment, in the microwave detection apparatus of this modified embodiment of the present invention, the first microwave detection module 20 and the second microwave detection module 30 are implemented as the same microwave detection module 50 having microwave transmitting and receiving functions, wherein the processor module 10 is further configured to feed the microwave detection module 50 with the first mode excitation signal having a pulse operation time of less than 1 second and a duty cycle of less than 10%, and to excite the signal with the second mode continuously in the second detection mode, or the microwave detection module 50 is fed by the second mode excitation signal with the pulse working time of more than or equal to 1 second or more than or equal to 10% of duty ratio, and the microwave detection module 50 emits intermittent microwaves with the pulse working time of less than 1 second and the duty ratio of less than 10% in the first detection mode, and emits continuous microwaves in the second detection mode, or emits intermittent microwaves with the pulse working time of more than or equal to 1 second or more than or equal to 10% of duty ratio.

Similarly, the microwave detection device operates in the first detection mode after being powered on to detect the presence of activity in microwaves with a pulse on-time of less than 1 second and a duty cycle of less than 10% based on the doppler effect principle, and detects the transregional action of the human body in the target detection region in the direction perpendicular to the detection direction of the microwave detection device by the infrared pyroelectric sensor (PIR)60 based on the division of the target detection region by the fresnel lens in the direction perpendicular to the detection direction of the microwave detection device, wherein when the processor module 10 obtains the detection result of the presence of activity in the target detection region in the first detection mode, the processor module 10 triggers the timing of the time duration t1 and determines that the human body enters (exists) the target detection region in the active state, wherein in the time duration t1, the processor module 10 forms a time delay bar for the time duration t1 based on the detection result of the presence of activity in the target detection region Continuing to time the duration of t1 and determining that the human body is present in the target detection region in an active state, and subsequently, when the processor module 10 acquires the detection result that the active presence feature is not present in the target detection region within the continuous duration of t1, the processor module 10 triggers the timing of the duration of t2 and switches to the second detection mode at least once within the duration of t2, wherein in the second detection mode the processor module 10 determines that the human body is present in the target detection region in a static state when acquiring the detection result that the target detection region has the static presence feature based on the corresponding threshold setting, determines that the human body entering the target detection region is in a state of leaving the target detection region based on the detection result that the target detection region has no static presence feature, and switches back to the first detection mode after the timing of the duration of t2 ends, or switch back to the first detection mode based on the detection of the presence of the static presence feature in the target detection region for a duration t 2.

In particular, since the first microwave detection module 20 and the second microwave detection module 30 are implemented as the same microwave detection module 50 having microwave transmission and reception functions, i.e. the microwave detection module 50 is difficult to be fed by the first mode excitation signal and the second mode excitation signal at the same time, the infrared pyroelectric sensor (PIR)60 is maintained in an operative state to detect an activity presence characteristic corresponding to the second detection mode, in which for the second detection mode to guarantee detection accuracy of the activity presence characteristic, the processor module 10 shunts to detect the activity presence characteristic corresponding to the human body movement action and the static presence characteristic corresponding to the human body heartbeat and/or respiration type micro-actions based on the selection of the fluctuation signal for different specific frequency ranges, and when the processor module 10 relies on the infrared pyroelectric sensor (PIR)60 and/or the micro-sensor (PIR) in the second detection mode The wave detection module 50 detects the activity presence characteristic, switches back to the first detection mode and triggers timing of the time duration of t1 after acquiring the detection result of the activity presence characteristic in the target detection region, so as to prevent the behavior state of the human body in the target detection region leaving the target detection region in the timing process of the time duration of t2 from being misjudged as the presence state of the target detection region in a static state, thereby ensuring the stability of the detection result of the microwave detection device.

In particular, in this variant embodiment of the invention, corresponding to fig. 7C, in said second detection mode, the shunting detection of the active presence characteristic corresponding to the movement of the body and the static presence characteristic corresponding to the heartbeat and/or respiratory-like micromotions of the body by said microwave detection means comprises the following steps:

(ii) receiving a second mode reflection echo formed by the second mode microwave beam reflected by a corresponding object to generate a corresponding second mode echo signal;

(iv) converting the doppler intermediate frequency signal into the fluctuation signal based on the change of the frequency/amplitude of the second mode doppler intermediate frequency signal with time, that is, the fluctuation signal is a change signal of the frequency/amplitude of the second mode doppler intermediate frequency signal with time; and

(v) two paths of the fluctuation signals of two specific frequency ranges in the fluctuation signals are selected in a filtering mode, wherein one specific frequency range is in a frequency range which is less than or equal to 3Hz, and the other specific frequency range is in a frequency range which is greater than 3Hz and less than 50Hz, namely, one set of the specific frequency ranges is a subset of a set of the frequency ranges which is less than or equal to 3Hz, and the other set of the specific frequency ranges is a subset of a set of the frequency ranges which is greater than 3Hz and less than 50 Hz.

And correspondingly acquiring the detection result of the dynamic existence characteristic according to the detection result of the fluctuation signal of the specific frequency range within the frequency range larger than 3Hz and smaller than 50Hz based on the corresponding threshold value.

Optionally, corresponding to fig. 7D, in some embodiments of the present invention, in the second detection mode, the shunting detection of the active presence characteristic corresponding to the human body movement action and the static presence characteristic corresponding to the human body heartbeat and/or respiration-like micro-action by the microwave detection device comprises the following steps:

(i) transmitting at least one microwave beam corresponding to the frequency of the second mode excitation signal;

(ii) receiving a reflected echo formed by the microwave beam reflected by a corresponding object to generate a corresponding echo signal;

(iii) generating two Doppler intermediate frequency signals based on the frequency/phase difference between the second mode excitation signal and the echo signal in a mixing detection mode;

(iv) converting one of the Doppler intermediate frequency signals into a fluctuation signal based on the change of the frequency/amplitude of the one of the Doppler intermediate frequency signals along with time, namely the fluctuation signal is the change signal of the frequency/amplitude of the Doppler intermediate frequency signals along with time; and

(v) the undulation signal of a particular frequency range in the undulation signal is selected in a filtered manner, wherein the particular frequency range lies within a frequency range smaller than 50Hz, i.e. the set of particular frequency ranges is a subset of the set of frequency ranges smaller than 50 Hz.

(iv) obtaining the detection result of whether the activity presence feature exists in the target detection area based on the corresponding threshold setting of the other path of the doppler intermediate frequency signal after the step (iii), so that while the activity presence feature of the target detection area is detected by the infrared pyroelectric sensor (PIR)60 based on the partition of the target detection area by the fresnel lens in the direction perpendicular to the detection direction of the microwave detection device, the activity presence feature of the human body in the target detection area is detected by the transregional action of the infrared pyroelectric sensor (PIR)60 in the direction perpendicular to the detection direction of the microwave detection device, the detection of the activity presence feature is further realized by the microwave in the second detection mode.

Optionally, in other embodiments of the present invention, the processor module 10 is configured to feed the microwave detection module 50 with the first mode excitation signal pulsed on for less than 1 second with a duty cycle of less than 10%, and feeding said microwave detection module 50 with said second mode excitation signal having a pulse duty cycle of 1 second or more or 10% or more in said second detection mode, and the pulse on time of the second mode excitation signal is set to remain staggered from the pulse on time of the first mode excitation signal for a time period of t2, in a state where the first microwave detection module 20 and the second microwave detection module 30 are implemented as the same microwave detection module 50 having microwave transmission and reception functions, the first probing mode allows for probing for an active presence feature while the second probing mode is maintained enabled.

In particular, in some embodiments of the invention, the microwave detection means are operable in the first detection mode and in the second detection mode simultaneously in a powered-up state and are arranged to control the operating state of at least one electrical device based on the detection of the active presence characteristic and the static presence characteristic, such as in a state in which at least one of the electrical devices is implemented as a UV germicidal lamp, the microwave detection means being arranged to control the UV germicidal lamp to be switched off based on either of the detection of the active presence characteristic and the detection of the static presence characteristic, and to control the UV germicidal lamp to be switched on only after the detection of the active presence characteristic and the detection of the static presence characteristic has not been detected, or to be in a state allowing switching control.

In other embodiments of the present invention, the microwave detection apparatus is configured to operate in the first detection mode when powered on and is configured to trigger timing of a time period t2 based on detection results obtained from the activity presence characteristic, to initiate the second detection mode at least once during a time period t2, and to exit the second detection mode based on detection results obtained from the absence of the static presence characteristic for a time period t2, in response to the presence of a less active human being. Further, the microwave detection device is configured to control the operating state of at least one electrical device based on a timing trigger condition of a time period t2, such as a state in which at least one electrical device is implemented as a UV germicidal lamp, and the microwave detection device is configured to control the UV germicidal lamp to turn off based on the timing trigger condition of the time period t2, and to control the UV germicidal lamp to turn on based on a detection result that the static existence characteristic is not obtained within the time period t2, or to control the UV germicidal lamp to be in a state that is allowed to be turned on in an on-off control manner.

With continuing reference to figures 3A and 7B of the drawings accompanying this specification, to further the understanding of the present invention, a method of detecting the operating logic of the microwave detection apparatus corresponding to the various embodiments of the present invention described above is further described, wherein the microwave detection method comprises the steps of:

(A) detecting human body activity with microwaves with pulse working time less than 1 second and duty cycle less than 10% in the first detection mode, and based on the partition of a Fresnel lens to the target detection area in the direction perpendicular to the detection direction of the microwave detection device, detecting the transregional action of the human body in the target detection area in the direction perpendicular to the detection direction of the microwave detection device with the infrared pyroelectric sensor (PIR)60, and acquiring a detection result of detection of an activity presence characteristic corresponding to the human body movement action based on the detection of the human body activity and/or the transregional action of the human body in the direction perpendicular to the detection direction of the microwave detection device in the first detection mode;

(B) timing a time duration of t1 based on the probe result of the presence of the activity presence feature, and continuing the time duration of t1 for a time duration of t1 based on the probe result of the presence of the activity presence feature forming a continuation condition to the time duration of t 1;

(C) after the timing of the time length of t1 is finished, the second detection mode is entered at least once, and the second detection mode detects the human body activity corresponding to the human body heartbeat and/or respiratory micro-motion by continuously emitting microwaves or microwaves with the pulse working time of more than or equal to 1 second or more than or equal to 10% of duty ratio so as to form the detection of the static existing characteristics corresponding to the human body heartbeat and/or respiratory micro-motion; and

(D) exiting the second probing mode and returning to step (a).

Further, in the two embodiments of the present invention, wherein in the step (B), the duration of time t1 is formed by resetting the timing of the duration of time t1 with the current time node as the timing starting point based on the detection result of the existence of the active existence feature in the duration of time t 1.

Optionally, in some embodiments of the present invention, wherein in the step (B), the duration of t1 is re-counted by using a time node after the duration of t1 as a timing starting point within the duration of t1 based on the detection result of the existence of the active existence feature to form the duration of t 1.

Further, in the embodiments of the present invention, in the step (C), it is preferable to enter the second detection mode based on the end delay triggering of the timing of the time duration t1, and during the delay, the step (B) is returned by triggering the timing of the time duration t1 after the detection result of the activity presence feature corresponding to the human body movement action is acquired based on the first detection mode, so as to avoid frequent triggering of the timing of the time duration t2 by the transient static state and frequent in-and-out behavior of the human body in the target detection area, and to keep the time duration t1 for a suitable time length to ensure the timely feedback of the human body behavior state by the microwave detection device based on the first detection mode.

Preferably, in the two embodiments of the present invention, wherein in the step (B), the time period of t1 is set to be greater than or equal to 5 seconds.

Specifically, in the two embodiments of the present invention, wherein in the step (C), the detecting of the static existence feature corresponding to the human heartbeat and/or respiratory type micro-motion based on the second detection mode comprises the following steps:

(C1) transmitting said second mode microwave beam corresponding to said second mode excitation signal frequency;

(C2) receiving a second mode reflection echo formed by the second mode microwave beam reflected by a corresponding object to generate a corresponding second mode echo signal;

(C3) generating a second mode Doppler intermediate frequency signal based on a frequency/phase difference between the second mode excitation signal and the second mode echo signal by means of mixed detection;

(C4) converting the Doppler intermediate frequency signal into a fluctuation signal based on the change of the frequency/amplitude of the second mode Doppler intermediate frequency signal with time, namely the fluctuation signal is the change signal of the frequency/amplitude of the Doppler intermediate frequency signal with time; and

(C5) the undulation signal of a particular frequency range in the undulation signal is selected in a filtered manner, wherein the particular frequency range lies within a frequency range smaller than 50Hz, i.e. the set of particular frequency ranges is a subset of the set of frequency ranges smaller than 50 Hz.

In particular, wherein in said step (C5), said specific frequency range is preferably within a frequency range of less than or equal to 5Hz, such as setting said specific frequency range to a frequency range of less than or equal to 3Hz, said fluctuation signal corresponding to said specific frequency range characterizes an action with an action frequency of less than or equal to 3Hz and is able to approximately characterize a static presence characteristic corresponding to a human heartbeat and/or respiratory type inching, such as to set a detection of a static presence characteristic corresponding to a human heartbeat and/or respiratory type inching based on a respective threshold value for the amplitude of said fluctuation signal.

Preferably, in the step (C), the human body activity corresponding to the human heartbeat and/or respiratory micro-motion is detected by the microwaves with the pulse duty cycle of more than 10% based on the doppler effect principle in the second detection mode, so as to reduce the average power consumption of the microwave detection device while ensuring the detection accuracy of the static existence features corresponding to the human heartbeat and/or respiratory micro-motion.

Further, in the two embodiments of the present invention, in the step (C), a timing step of a time duration of t2 is further included, specifically, a time duration of t2 is counted after the timing of the time duration of t1 is ended, and the second detection mode is entered at least once within the time duration of t 2.

Further wherein in said step (D), said second detection mode is turned off based on the end of the timing of the duration of t 2.

Preferably, in the step (D), the second detection mode is turned off during the timing of the time period t2 based on the end of the timing of the time period t2 when the detection result of the static presence features corresponding to the human heartbeat and/or respiratory type micro motion is detected.

Optionally, wherein in said step (D), said second detection mode is turned off based on the end of a full timing of a duration of t 2.

Further, in a state in which the step (C) is performed, the step (a) is maintained to be performed, and the detection result of the activity presence feature corresponding to the human body movement action is detected with a higher priority than the detection result of the static presence feature corresponding to the human body heartbeat and/or respiration-like micro action, that is, the step (B) is performed with a higher priority than the step (C), corresponding to the step (C), being performed after the activity presence feature corresponding to the human body movement action is detected in the first detection mode based on the execution of the step (a), so as to avoid that the behavior state of the human body in the object detection region leaving the object detection region during the timing of the time period t2 is erroneously judged as the presence state in which the object detection region is in a static state.

Preferably, in the two embodiments of the present invention, wherein in the step (C), the time period of t2 is set to be less than or equal to 1 minute.

Optionally, in some embodiments of the invention, wherein in step (D), the second detection mode is turned off based on a detection result that no static presence feature corresponding to human heartbeat and/or respiratory-like micro-motion is detected.

Specifically, in these embodiments of the present invention, wherein in said step (C), a time duration of t2 is counted after the end of the counting of the time duration of t1, and said second detection mode is entered for a time duration of t2, and a time duration of t2 is continued for a time duration of t2 based on the detection result of the detection of the static-presence feature forming a continuation condition for the time duration of t 2.

Preferably, in the embodiments of the present invention, in the step (C), the timing of the time period t2 is reset in a time period t2 based on the detection result of the detected static existence characteristic, so as to form a time delay for the time period t2 and an intermittent entry for the second detection mode, so as to reduce the entry time of the second detection mode in the case that the detected human body is kept static for a long time, which is beneficial to reduce the average power consumption of the microwave detection apparatus.

Further, in order to realize intelligent control over the electrical device 100 based on the determination result of the presence or absence of the human body in the target detection area and/or the determination of the behavior state of the human body in the target detection area, the step (B) further includes:

(B1) and controlling the working state of at least one electrical device 100 based on the detection result of the activity existence characteristic in the target detection area, such as controlling a lamp to be in an illumination state for the time period t1 or controlling a germicidal lamp to be in an off state.

This allows intelligent control of the electrical device 100 based on the behavior (state) of the human body entering (existing) the target detection area in an active state.

Preferably, in the step (B1), the operating state of the electric device 100 is wirelessly controlled based on the detection result of the presence of the activity presence feature in the target detection area.

Further, in the step (C), a step of:

controlling the operating state of the electrical device 100, such as controlling the light fixture to be in an off state or controlling the germicidal lamp to be in an on state, based on the detection result that the static existence characteristic corresponding to the human heartbeat and/or respiration type micro-motion is not detected.

This allows the electrical device 100 to be intelligently controlled based on the behavior (state) of the human body leaving (not existing) the target detection area.

Further, in the step (C), a step of:

the working state of the electrical device 100 is controlled based on the detection result of the static existence characteristic corresponding to the heartbeat and/or breathing type micro-motion of the human body, so that the electrical device 100 is intelligently controlled to adjust environmental parameters such as ambient light, humidity and temperature.

Further, in both embodiments of the present invention, to simplify the program requirements for the corresponding electrical device 100 for realizing the modularization of the microwave detection apparatus, the presence detection method further includes a step of determining the human behavior state based on the detection result of the active presence characteristic corresponding to the human movement and the detection result of the static presence characteristic corresponding to the human heartbeat and/or respiratory type micro-motion.

Specifically, as shown in fig. 5, in the step (B), the behavior state S1 in which the human body enters the target detection region in an active state is judged based on the detection result that the activity existence feature exists in the target detection region, and the behavior state S2 in which the human body exists in the active state in the target detection region is judged based on the detection result that the activity existence feature exists in the target detection region in the time period t1, that is, the behavior state S1 in which the human body enters the target detection region in the active state is judged in accordance with the formation of the timing trigger condition of the time period t1, and the behavior state S2 in which the human body exists in the active state in the target detection region is judged in accordance with the formation of the continuation condition of the time period t 1.

Further, wherein in the step (C), the behavior state that the human body leaves the target detection region is judged based on the detection result that the static existence feature corresponding to the heartbeat and/or the breathing type micro action of the human body is not detected S3, and the behavior state that the human body exists in the target detection region in a static state is judged based on the detection result that the static existence feature corresponding to the heartbeat and/or the breathing type micro action of the human body is detected S4.

Specifically, wherein in the step (B), in a preceding state of the behavior state S3 in which the human body leaves the target detection region, the behavior state S1 in which the human body enters the target detection region in an active state is judged based on the detection result of the presence of the activity presence feature in the target detection region, and in a preceding state of the behavior state S4 in which the human body exists in the target detection region in a static state, the behavior state S2 in which the human body exists in the target detection region in an active state is judged based on the detection result of the presence of the activity presence feature in the target detection region, and the preceding state of the behavior state S4 in which the human body exists in the target detection region in a static state is maintained based on the detection result of the absence of the activity presence feature in the target detection region.

In addition, in a preferred embodiment, in the microwave detecting device for improving the reliability of human presence detection, the processor module may be implemented as an excitation signal module, that is: the microwave detection device has a first detection mode and a second detection mode, and is suitable for detecting activity presence features corresponding to human body movement actions in the first detection mode and detecting static presence features corresponding to human body heartbeat and/or respiration type micro actions in the second detection mode, wherein the microwave detection device is configured to trigger timing of a time period t1 based on detection results of the activity presence features being obtained, and to continue timing of a time period t1 based on detection results of the activity presence features being obtained in a time period t1, and to control entry of the second detection mode based on ending of timing of the time period t1, wherein the microwave detection device comprises:

a first microwave detection module, wherein in the first detection mode, the first microwave detection module is fed by a first mode excitation signal to emit a microwave beam at a frequency corresponding to the first mode excitation signal;

a second microwave detection module, wherein in the second detection mode, the second mode detection module is fed by a second mode excitation signal to emit a microwave beam corresponding to the frequency of the second mode excitation signal, wherein the second mode excitation signal is set to be a continuous signal or a discontinuous signal with a pulse duty cycle of 1 second or more or 10% or more; and

an excitation signal module communicatively coupled to the first microwave detection module and the second microwave detection module to output the first mode excitation signal and the second mode excitation signal to the first microwave detection module and the second microwave detection module, respectively, wherein in a state where the excitation signal module independently outputs the first mode excitation signal, an operating current of the excitation signal module is I1, and in a state where the excitation signal module independently outputs the second mode excitation signal, an operating current of the excitation signal module is I2, wherein I1: I2 is less than or equal to 1:2, wherein the excitation signal module is configured to trigger timing of a time period t1 based on a detection result of the acquired activity presence characteristic and to continue timing of a time period t1 based on a detection result of the acquired activity presence characteristic for a time period t1, and controlling the wake-up/activation of the second microwave detection module to enter the second detection mode based on the end of the timing of the duration of t 1.

In order to reduce the operating current I1 of the excitation signal module in a state where the excitation signal module independently outputs the first mode excitation signal, the first mode excitation signal may be configured as an intermittent signal having a low duty ratio, such as an intermittent signal having a pulse operating time less than 1 second and a duty ratio less than 10%, so that the operating current I1 of the excitation signal module may be effectively reduced, thereby reducing an effective value of a radiation power of a corresponding microwave beam. Further, the first mode excitation signal may also be configured to have a low duty ratio and be an intermittent signal that is output intermittently, that is, an excitation signal of one period is output intermittently for a certain time period and then an excitation signal of the next period is output, so as to further reduce the operating current I1 of the excitation signal module. Still further, the first mode excitation signal may also be configured as an intermittent signal with a low duty cycle, or an intermittent signal with a low duty cycle and being intermittently output, while the amplitude value of the first mode excitation signal is reduced to further reduce the operating current I1 of the excitation signal module, enabling detection of a microwave beam with a lower effective value of radiation power. In addition, the first mode excitation signal may also be configured as a continuous wave signal, but the operating current I1 of the excitation signal module is reduced by reducing the amplitude value of the first mode excitation signal. The manner of reducing the operating current I1 of the excitation signal module may be expanded or combined in turn. Thus, by reducing the operating current I1 of the excitation signal module by a combination of one or more of the above measures, the effective value of the radiation power of the corresponding microwave beam can be synchronously reduced, and the microwave beam emitting the frequency corresponding to the first mode excitation signal is a micro-power microwave beam. The penetrability of the microwave beam can be obviously reduced, so that the interference outside a target detection area caused by the penetration of glass, walls or other building materials can be effectively avoided, the detection sensitivity of micro movement of a non-detection object is reduced, the interference of the micro movement of the non-detection object in the target detection area is reduced, and the reliability of the detection of the movement existence characteristics corresponding to the movement action of a human body is improved.

In the state where the excitation signal module outputs the second mode excitation signal independently, the operating current I2 of the excitation signal module is much larger than I1, such as twice as large as I1, ten times or more. And transmitting a microwave beam corresponding to the frequency of the first mode excitation signal, wherein the effective value of the radiation power of the microwave beam is larger and the microwave beam is a low-power microwave beam. For example, under the ISM standard, the maximum radiation emission power of the 5.8GHz band is 25mW, the microwave beam with the radiation emission power of less than 25mW belongs to a low-power microwave beam, the low-power microwave beam with the 5.8GHz band has relatively strong penetrability and increased penetrability, can penetrate through clothes or coverings of a human body, and can improve the detection capture capability of signals such as respiration/heartbeat of the human body in different body position states in the target detection area.

Also, in a preferred embodiment, in the microwave detecting device for improving the reliability of human presence detection, the processor module may be implemented as an excitation signal module, namely: the microwave detection device has a first detection mode and a second detection mode, and is suitable for detecting activity existence characteristics corresponding to the movement action of the human body in the first detection mode and detecting static existence characteristics corresponding to the heartbeat and/or respiration type micro action of the human body in the second detection mode, wherein the microwave detection device is set to trigger the timing of t1 duration based on the detection result of obtaining the activity existence characteristics, continue the timing of t1 duration based on the detection result of obtaining the activity existence characteristics in t1 duration and exit the second detection mode based on the ending of the timing of t1 duration, wherein the microwave detection device comprises:

an excitation signal module, wherein the excitation signal module is communicatively connected to the microwave detection module and configured to feed the microwave detection module with a first mode excitation signal in the first detection mode, and to feed the microwave detection module with a second mode excitation signal in the second detection mode, wherein the second mode excitation signal is set to be a continuous signal or an intermittent signal having a pulse duty cycle of 1 second or more or 10% or more, wherein the excitation signal module independently outputs the first mode excitation signal and the excitation signal module has an operating current of I1, and the excitation signal module independently outputs the second mode excitation signal and has an operating current of I2, wherein I1: I2 ≦ 1:2, wherein the excitation signal module is further configured to trigger a time-length meter for t1 based on a detection result of the activity presence characteristic And continuing to time the duration of t1 for a duration of t1 based on the obtained detection of the active presence feature and outputting the second mode excitation signal to enter the second detection mode based on the end of the time of t 1.

In a state where the excitation signal module independently outputs the first mode excitation signal, in order to reduce the operating current I1 of the excitation signal module, the first mode excitation signal may be configured as an intermittent signal having a low duty cycle, such as an intermittent signal having a pulse operating time less than 1 second and a duty cycle less than 10%, so that the operating current I1 of the excitation signal module may be effectively reduced, thereby reducing an effective value of radiation power of a corresponding microwave beam. Further, the first mode excitation signal may also be configured to have a low duty ratio and be an intermittent signal that is output intermittently, that is, an excitation signal of one period is output intermittently for a certain time period and then an excitation signal of the next period is output, so as to further reduce the operating current I1 of the excitation signal module. Still further, the first mode excitation signal may be further configured to be an intermittent signal with a low duty cycle, or an intermittent signal with a low duty cycle and being intermittently output, and the amplitude value of the first mode excitation signal is reduced to further reduce the operating current I1 of the excitation signal module, thereby realizing detection of a microwave beam with a lower effective value of radiation power. In addition, the first mode excitation signal may also be configured as a continuous wave signal, but the operating current I1 of the excitation signal module is reduced by reducing the amplitude value of the first mode excitation signal. The manner of reducing the operating current I1 of the excitation signal module may be expanded or combined in turn. Thus, by reducing the operating current I1 of the excitation signal module by a combination of one or more of the above measures, the effective value of the radiation power of the corresponding microwave beam can be synchronously reduced, and the microwave beam emitting the frequency corresponding to the first mode excitation signal is a micro-power microwave beam. The penetrability of the microwave beam can be obviously reduced, so that the interference outside a target detection area caused by the penetration of glass, walls or other building materials can be effectively avoided, the detection sensitivity of micro movement of a non-detection object is reduced, the interference of the micro movement of the non-detection object in the target detection area is reduced, and the reliability of the detection of the movement existence characteristics corresponding to the movement action of a human body is improved. In the state where the excitation signal module outputs the second mode excitation signal independently, since the operating current I2 of the excitation signal module is much larger than I1, for example, 2 times or ten times or more of I1. And transmitting a microwave beam corresponding to the frequency of the first mode excitation signal, wherein the effective value of the radiation power of the microwave beam is larger and the microwave beam is a low-power microwave beam.

For example, under the ISM standard, the maximum radiation emission power of the 5.8GHz band is 25mW, the microwave beam with the radiation emission power less than 25mW belongs to a low-power microwave beam, the low-power microwave beam has relatively strong penetrability, the penetrability is increased, the microwave beam can penetrate through clothes or coverings of a human body, the detection and capture capabilities of signals of respiration/heartbeat of the human body in different body position states in the target detection area are improved, and because the frequency of an echo signal or a very low frequency signal based on the doppler effect corresponding to the static existence feature corresponding to the heartbeat and/or respiration type micromotion of the human body is very low, the frequency range is very small, the interference of non-detected targets inside and outside the target detection area is small, and thus the reliability of detection of the static existence feature is also improved.

It will be appreciated by persons skilled in the art that the embodiments of the invention described above and shown in the drawings are given by way of example only and are not limiting of the invention. The objects of the invention have been fully and effectively accomplished. The functional and structural principles of the present invention have been shown and described in the examples, and any variations or modifications of the embodiments of the present invention may be made without departing from the principles.

Claims

1. Microwave detection means having a first detection mode and a second detection mode and being adapted to detect in said first detection mode an active presence characteristic corresponding to a movement of the person and to detect in said second detection mode a static presence characteristic corresponding to a heartbeat and/or respiration-like micromotion of the person, wherein said microwave detection means is arranged to enter said second detection mode in response to a detection of an active presence characteristic in said first detection mode in response to a detection of an active presence characteristic in a corresponding trigger rule to detect a static presence characteristic and to exit said second detection mode in response to a detection of an undetected static presence characteristic, wherein in said first detection mode said microwave detection means is excited by a first mode excitation signal to emit a first mode microwave beam having a frequency corresponding to said first mode excitation signal, and receiving a first mode echo signal generated by a first mode reflected echo formed by the first mode microwave beam reflected by a corresponding object, and generating a first mode doppler intermediate frequency signal corresponding to a frequency or phase difference between the first mode excitation signal and the first mode echo signal in a frequency mixing detection manner based on a doppler effect principle, and simultaneously detecting a transregional action of a human body in a target detection region in a direction perpendicular to a radiation direction of the first mode microwave beam by using an infrared pyroelectric sensor based on a region of a fresnel lens in the target detection region in a direction perpendicular to the radiation direction of the first mode microwave beam so as to compensate a low responsivity defect of the first mode intermediate frequency doppler signal characteristic to an activity in the direction perpendicular to the radiation direction of the first mode microwave beam, corresponding to the first detection mode, the microwave detection device feeds back a detection result representing the existence of the activity existence characteristic in a target detection area according to the existence of a signal meeting a corresponding threshold value condition in the first mode Doppler intermediate frequency signal and/or the existence of the cross-area action by the infrared pyroelectric sensor, wherein the first mode excitation signal is an intermittent signal with the pulse working time of less than 1 second and the duty ratio of less than 10 percent; wherein in the second detection mode, the microwave detection device is excited by a second mode excitation signal to emit a second mode microwave beam corresponding to the frequency of the second mode excitation signal, and receives a second mode reflection echo formed by the second mode microwave beam being reflected by a corresponding object to generate a corresponding second mode echo signal, and generates a second mode doppler intermediate frequency signal corresponding to the frequency or phase difference between the second mode excitation signal and the second mode echo signal in a mixed detection manner based on the doppler effect principle, and converts the second mode doppler intermediate frequency signal into a fluctuation signal based on the change of the frequency/amplitude of the second mode doppler intermediate frequency signal with time, and selects the fluctuation signal of a specific frequency range in the fluctuation signal in a filtering manner, wherein the specific frequency range is within a frequency range of less than 50Hz to characterize detection results of the static presence feature of the target detection region based on the presence of fluctuations in the fluctuation signal of the specific frequency range that satisfy respective threshold conditions.

2. The microwave detection apparatus of claim 1 wherein the microwave detection apparatus is arranged in the first detection mode to trigger timing of a duration of T1 based on a detection result of the presence of the active presence feature in the target detection zone and to enter the second detection mode at least once for a duration of T1 to detect the static presence feature and to continue timing of a duration of T1 based on a detection result of the presence of the static presence feature in the target detection zone forming a continuation condition of a duration of T1 and to exit the second detection mode based on a detection result of the absence of the static presence feature in the target detection zone.

3. The microwave detection apparatus of claim 2 wherein in the first detection mode, the microwave detection apparatus is configured to trigger timing of a time period T1 based on a detection result of the presence of an active presence feature in the target detection zone and to delay entry into the second detection mode for a time period T1.

4. A microwave detection arrangement according to claim 3 wherein the microwave detection arrangement is arranged to detect a static presence feature in the second detection mode, the second detection mode being exited after the expiry of a time period T1 based on the detection of the absence of the static presence feature in the target detection zone.

5. The microwave detection device of claim 4, wherein the microwave detection device further comprises a wireless module, wherein the wireless module is configured to control an operating state of at least one electrical device based on the time trigger condition of the time duration T1 and the end of the time duration T1.

6. The microwave detection apparatus of claim 1 wherein, in the first detection mode, the microwave detection apparatus is configured to trigger timing of a time duration t1 based on a detection result of the presence of the active presence feature of the target detection region, and to continue timing of a time duration t1 based on a detection result of the presence of the active presence feature of the target detection region forming a continuation condition of the time duration t1 for the time duration t1, and to trigger timing of a time duration t2 based on an end of the time duration t1, and to enter the second detection mode for the time duration t2 at least once to detect the static presence feature, to identify a behavior state S4 in which the human body is present in the target detection region in a static state based on the detection result of the presence of the static presence feature of the target detection region, and to identify a behavior state S3 in which the human body is absent from the target detection region, and exits the second detection mode after the timing of the time period t2 ends.

7. The microwave detection device of claim 6, wherein the microwave detection device further comprises a wireless module, wherein the wireless module is configured to control the operating state of the at least one electrical apparatus based on the time trigger condition of the time duration t1 and the end of the time duration t 2.

8. The microwave detection apparatus of claim 7 wherein the time period t2 is set to 1 minute or less and the time period t1 is set to 5 seconds or more.

9. The microwave detection apparatus of claim 8 wherein the microwave detection apparatus is configured to exit the second detection mode by timing a time duration t2 ahead of the end of the detection of the presence of the static presence feature in the target detection zone during the time duration t 2.

10. The microwave detection apparatus of claim 8 wherein the microwave detection apparatus is configured to continue for a time period of t2 during the timing of time period of t2 based on the detection of the presence of the static presence feature at the target detection region resulting in a time delay condition of time period t 2.

11. The microwave detection apparatus of claim 10 wherein the microwave detection apparatus is arranged to delay resetting the timing of the duration t2 during the timing of the duration t2 based on the detection result of the presence of the static presence feature of the target detection region to form a continuation of the duration t 2.

12. The microwave detection apparatus of claim 8 wherein the microwave detection apparatus is configured to remain in the first detection mode while detecting the active presence feature during the time period t2, and to terminate the time period t2 and trigger the time period t1 upon detection of the active presence feature in the target detection zone.

13. The microwave detection apparatus according to claim 1, wherein the specific frequency range is set within a frequency range of 5Hz or less.

14. The microwave detection apparatus according to claim 13, wherein the specific frequency range is set within a frequency range of 1Hz or less.

15. A microwave detection apparatus as claimed in claim 14 wherein the first mode excitation signal is provided as a discontinuous signal having a pulse on time in the order of microseconds or less and a duty cycle below 1%.

16. A microwave detection apparatus as claimed in claim 15 wherein the second mode excitation signal is set to be a discontinuous signal with a pulse on time of 1 second or more or 10% duty cycle or more.

17. A microwave detection apparatus according to any one of claims 1 to 16, wherein the microwave detection apparatus comprises:

a second microwave detection module, wherein in the second detection mode, the second detection module is fed by the second mode excitation signal to emit a second mode microwave beam at a frequency corresponding to the second mode excitation signal;

18. The microwave detection apparatus of claim 17 wherein I1: I2 ≦ 1: 10.

19. A microwave detection device as claimed in claim 17, wherein in a powered state of the microwave detection device, the first microwave detection module and the infra-red pyroelectric sensor are maintained in an operative state, the second microwave detection module being connected to and awakened/activated under control of the processor module, the microwave detection device being maintained in the first detection mode while detecting an activity presence characteristic in response to the second detection mode in which the second microwave detection module is awakened/activated.

20. A microwave detection apparatus according to any one of claims 1 to 11, wherein the microwave detection apparatus comprises:

21. A microwave detection apparatus as claimed in claim 20 wherein the processor module is arranged to output the first mode excitation signal simultaneously with the output of the second mode excitation signal, the corresponding second mode excitation signal being arranged as a discontinuous signal and staggered with respect to the pulsed on-time of the first mode excitation signal, so as to maintain the first detection mode whilst detecting an active presence feature in the second detection mode.

22. The microwave detection apparatus according to claim 20, wherein in the second detection mode, the microwave detection apparatus performs shunt detection of active presence features and static presence features based on the following steps to equivalently maintain the first detection mode in the second detection mode:

(ii) receiving the second reflected echo formed by the second mode microwave beam reflected by the corresponding object to generate a corresponding second mode echo signal;

wherein the processor module is configured to feed back an activity presence characteristic of a target detection zone with the fluctuation signal at the particular frequency range within a frequency range greater than 3Hz and less than 50Hz, and the detection result of the static existence characteristic of the target detection area is represented according to the fluctuation meeting the corresponding threshold value condition in the fluctuation signal of the specific frequency range within the frequency range less than or equal to 3Hz, in a state that the infrared pyroelectric sensor is maintained to be powered, the first detection mode is equivalently maintained in the second detection mode according to the existence of the fluctuation meeting the corresponding threshold condition in the fluctuation signal of the specific frequency range within the frequency range which is greater than 3Hz and less than 50Hz and/or the detection result of the characteristic that the cross-region action of the infrared pyroelectric sensor is fed back to the existence of the activity in the characteristic representation target detection region.