CN219039354U

CN219039354U - Microwave detection device with adjustable excitation signal amplitude

Info

Publication number: CN219039354U
Application number: CN202223080030.7U
Authority: CN
Inventors: 邹高迪; 邹明志; 邹新; 邹亮
Original assignee: Shenzhen Merrytek Technology Co Ltd
Current assignee: Shenzhen Merrytek Technology Co Ltd
Priority date: 2021-11-19
Filing date: 2022-11-19
Publication date: 2023-05-16
Anticipated expiration: 2032-11-19
Also published as: WO2023088451A1; CN115754916A; CN219302675U; CN219349116U; CN115825970A; CN219039355U

Abstract

The utility model provides a microwave detection device with adjustable excitation signal amplitude, wherein the microwave detection device with adjustable excitation signal amplitude comprises an MCU and a microwave chip, wherein the microwave chip is arranged to generate an excitation signal in a power supply state, the MCU is connected with the microwave chip in a communication mode and is provided with a plurality of excitation signal amplitude grades corresponding to the excitation signal generated by the microwave chip, the input end of the MCU is provided with a mechanical switch unit, the MCU selects the corresponding excitation signal amplitude grade by identifying the state of the mechanical switch unit, and then the effective amplitude of the excitation signal generated by the microwave chip is set according to the selected excitation signal amplitude grade, so that the effective amplitude adjustment of the excitation signal is realized, and the actual detection space of the microwave detection device with adjustable excitation signal amplitude is adjusted.

Description

Microwave detection device with adjustable excitation signal amplitude

Technical Field

The utility model relates to the field of Doppler microwave detection, in particular to a microwave detection device with an adjustable excitation signal amplitude.

Background

With the development of the internet of things technology, the requirements of artificial intelligence, intelligent home and intelligent security technology on environment detection, especially on detection accuracy of motion characteristics of existence, movement and inching of people, are higher and higher, and accurate judgment basis can be provided for intelligent terminal equipment only by acquiring enough stable detection results. The radio technology, including the existing microwave detection technology based on the Doppler effect principle, has unique advantages in the technology of behavior detection and existence detection, and can emit a microwave beam at a fixed frequency and receive a reflected echo formed by the reflection of the microwave beam by the corresponding object under the condition of not invading the privacy of the human, and then generate a Doppler intermediate frequency signal corresponding to the frequency difference between the microwave beam and the reflected echo in a frequency mixing detection mode, so that the amplitude fluctuation of the Doppler intermediate frequency signal corresponds to the Doppler effect generated by the motion of the corresponding object, thus representing the motion of the corresponding object based on the Doppler intermediate frequency signal, and realizing intelligent interconnection between the human and the object with the response of the corresponding electrical equipment to the human activity when applied to the detection of the human activity, thereby having wide application prospect, on the one hand, the boundary of the corresponding microwave beam is a gradient boundary with radiation energy attenuated to a certain degree, on the other hand, due to the lack of effective control means of electromagnetic radiation, namely the shaping means of the corresponding microwave beam boundary, the main gradient means is used for the electromagnetic radiation boundary, the electromagnetic interference detection means is difficult to cause the interference to the fact that the electromagnetic interference is actually carried out on the main gradient boundary of the microwave beam, the detection means is not matched with the actual condition of the actual condition, and the detection space is not matched with the actual condition of the actual condition, and the actual condition is present, and the space is not available, and the condition is not is set, and the space is not matched with the actual condition of the detection space, the problems of poor precision and/or poor anti-interference performance of the existing microwave detection technology based on the Doppler effect principle are caused, namely, the boundary of the microwave beam is a gradient boundary where radiation energy is attenuated to a certain degree, and meanwhile, a shaping means for the gradient boundary of the microwave beam is lacked, so that the actual detection space of the existing microwave detection module is difficult to match with the corresponding target detection space in actual application, and the defect that the adaptability of the existing microwave detection module in different application scenes in actual application is limited and the detection stability is poor is caused.

In order to solve the above-mentioned defect of the existing microwave detection module, the present method mainly selects the microwave detection module with the actual detection space larger than the corresponding target detection space, and sets and reduces the sensitivity of the microwave detection module according to the corresponding threshold value of the doppler intermediate frequency signal in amplitude, so as to eliminate the environmental interference and the action interference of the actual detection space outside the target detection space based on the reduction of the sensitivity. However, since the amplitude of the doppler intermediate frequency signal is related to the energy of the reflected echo and is also related to the area of the reflecting surface in the environment, the size of the reflecting surface and the moving speed of the moving object and the distance from the microwave detection module, environmental interference and motion interference of the actual detection space outside the target detection space cannot be accurately excluded based on the reduction of the sensitivity of the microwave detection module, so that the detection of the target detection space is not stable and accurate, for example, different moving objects with the same distance as the microwave detection module have different amplitude feedback in the doppler intermediate frequency signal due to different reflecting surface sizes and/or moving speeds, and moving objects with a longer distance as the microwave detection module may have higher amplitude feedback in the doppler intermediate frequency signal due to larger reflecting surface and/or moving speed, that is, the reduction of the sensitivity of the microwave detection module cannot accurately exclude the environmental interference and motion interference of the actual detection space outside the target detection space, so that the microwave detection module is not stable and accurate in the actual detection space.

In addition, the reduction of the sensitivity of the microwave detection module does not affect the actual detection space of the microwave detection module, so when the actual detection space of the microwave detection module is larger than the corresponding target detection space, the reduction of the sensitivity of the microwave detection module does not correspondingly reduce the power consumption of the microwave detection module on one hand, correspondingly causes radiation loss outside the target detection space, and on the other hand, self-excitation interference of the target detection space is easy to form, particularly, a state that a high-reflection object exists in the target detection space and a state that the target detection space is not an open space exist, such as a state that the target detection space is a scene of a room and a state that a wall surface and a ground are not an open space exist.

That is, the existing microwave detection module with the actual detection space larger than the corresponding target detection space is selected, and the doppler intermediate frequency signal generated by the environmental interference and the action interference of the actual detection space outside the target detection space is removed in a manner of reducing the sensitivity of the microwave detection module, so that on one hand, the environmental interference and the action interference of the actual detection space outside the target detection space cannot be accurately removed, and the detection of the target detection space is not stable and accurate; on the other hand, the self-excitation interference of the target detection space is easy to form, so that the work of the microwave detection module is unstable, and particularly, a high-reflection object exists in the target detection space and a non-open space with wall surfaces and ground exists in the target detection space; and radiation loss outside the target detection space is not caused by correspondingly reducing the power consumption of the microwave detection module.

Disclosure of Invention

An object of the present utility model is to provide a microwave detection device with adjustable excitation signal amplitude, wherein the microwave detection device with adjustable excitation signal amplitude can adjust the effective amplitude of the excitation signal, so as to adjust the gradient boundary of the microwave beam to adjust the actual detection space of the microwave detection device with adjustable excitation signal amplitude based on the correlation between the effective amplitude of the excitation signal and the energy density distribution of the microwave beam emitted by the microwave detection device with adjustable excitation signal amplitude, thereby correspondingly guaranteeing the stability of the microwave detection device with adjustable excitation signal amplitude in practical application.

An object of the present utility model is to provide a microwave detection device with an adjustable excitation signal amplitude, wherein the microwave detection device with the adjustable excitation signal amplitude comprises an MCU and a microwave chip, wherein the microwave chip is configured to generate the excitation signal in a powered state, wherein the MCU is communicatively connected to the microwave chip and is configured with a plurality of excitation signal amplitude steps corresponding to the excitation signal generated by the microwave chip, so as to set an effective amplitude of the excitation signal generated by the microwave chip based on the corresponding excitation signal amplitude step, thereby achieving effective amplitude adjustment of the excitation signal.

An object of the present utility model is to provide a microwave detection device with adjustable amplitude of an excitation signal, wherein the MCU includes a switch state identification unit, a logic processing unit, and a first communication unit, wherein an input end of the switch state identification unit is provided with a mechanical switch unit, the switch state identification unit is configured to identify a state of the mechanical switch unit and generate a corresponding digital signal, wherein the logic processing unit is electrically connected to the switch state identification unit and correspondingly selects a corresponding amplitude of the excitation signal based on the digital signal and processes the selected amplitude of the excitation signal into a hierarchical control signal that can be identified by the microwave chip, wherein the first communication unit is electrically connected to the logic processing unit to send the hierarchical control signal to the microwave chip, so that an effective amplitude of the excitation signal generated by the microwave chip is set based on a setting of the mechanical switch unit, that is, the actual detection space of the microwave detection device with adjustable amplitude of the excitation signal can be adjusted based on a state adjustment of the mechanical switch unit, so that the actual adjustment of the microwave detection space of the microwave detection device with adjustable amplitude of the excitation signal is simplified.

An object of the present utility model is to provide a microwave detecting device with an adjustable amplitude of an excitation signal, wherein the microwave chip includes a voltage-controlled oscillating unit, a digital logic control unit, an amplitude adjusting unit, and a second communication unit, wherein the second communication unit is communicatively connected to the first communication unit of the MCU, so as to be suitable for accessing the hierarchical control signal, wherein the digital logic control unit is electrically connected to the voltage-controlled oscillating unit, the amplitude adjusting unit, and the second communication unit, respectively, and is configured to control the voltage-controlled oscillating unit and the amplitude adjusting unit according to the hierarchical control signal, wherein the voltage-controlled oscillating unit is controlled by the digital logic control unit to output the excitation signal with a corresponding frequency, and wherein the amplitude adjusting unit is electrically connected to the voltage-controlled oscillating unit and is controlled by the digital logic control unit to adjust an effective amplitude of the excitation signal output by the voltage-controlled oscillating unit according to the hierarchical control signal, so that the effective amplitude of the excitation signal processed by the amplitude adjusting unit satisfies a mechanical switch state setting of the voltage-controlled oscillating unit.

It is an object of the present utility model to provide a microwave detection device with an adjustable amplitude of an excitation signal, wherein the mechanical switching unit comprises at least one set of amplitude adjustment switches, wherein the set of amplitude adjustment switches comprises at least two amplitude adjustment switches for corresponding formation of a voltage change at an input of the switch state identification unit based on a state change of the amplitude adjustment switches, wherein the switch state identification unit is arranged to generate the corresponding digital signal based on a voltage at its input, such that the corresponding amplitude grading of the excitation signal is selected based on adjusting the on or off of the amplitude adjustment switches, such that an adjustment of the actual detection space of the microwave detection device with an adjustable amplitude of the excitation signal is facilitated.

An object of the present utility model is to provide a microwave detecting device with adjustable excitation signal amplitude, wherein according to the selection of the excitation signal amplitude classification corresponding to the on-off state change of each amplitude adjustment switch, a corresponding relation between the adjustment of the actual detecting space of the microwave detecting device with adjustable excitation signal amplitude is designed to form an adjustment reference table, so that a user can adjust the on-off state of the amplitude adjustment switch according to a target detecting space of the microwave detecting device with adjustable excitation signal amplitude against the adjustment reference table, so that the actual detecting space of the microwave detecting device with adjustable excitation signal amplitude is matched with the target detecting space against the target detecting space.

An object of the present utility model is to provide a microwave detection device with adjustable excitation signal amplitude, in which the MCU selects the frequency of the excitation signal generated by the microwave chip in a grading manner for the corresponding excitation signal amplitude, and does not affect the impedance matching between the microwave chip and the corresponding antenna unit, i.e. the connection relationship between the MCU and the microwave chip can maintain the independence of the operating frequency and impedance of the microwave chip, so that the device is suitable for microwave detection based on the doppler effect principle.

An object of the present utility model is to provide a microwave detection device with adjustable excitation signal amplitude, wherein the connection relationship between the MCU and the microwave chip can maintain the independence of the operating frequency and impedance of the microwave chip, and the output efficiency of the microwave chip for generating the excitation signal is not changed when the corresponding excitation signal amplitude of the MCU is selected in a grading manner, so that the radiation power consumption of the microwave detection device with adjustable excitation signal amplitude can be adjusted with the same output efficiency based on the corresponding excitation signal amplitude of the MCU, and the overall power consumption of the microwave detection device with adjustable excitation signal amplitude is reduced when the actual detection space of the microwave detection device with adjustable excitation signal amplitude is matched with the target detection space based on the adjustment of the effective amplitude of the excitation signal.

An object of the present utility model is to provide a microwave detecting device with an adjustable excitation signal amplitude, wherein the microwave detecting device with an adjustable excitation signal amplitude comprises an antenna unit and a mixing unit, wherein an output end of the amplitude adjusting unit is fed and connected to the antenna unit to output the excitation signal to feed the antenna unit, wherein the antenna unit emits a microwave beam corresponding to a frequency of the excitation signal in a fed state to form the actual detecting space, and receives a reflected echo formed by the microwave beam being reflected by a corresponding object in the actual detecting space to transmit an echo signal corresponding to the reflected echo to the mixing unit, wherein the mixing unit is electrically connected to the voltage-controlled oscillating unit to access the excitation signal output by the voltage-controlled oscillating unit, wherein the mixing unit outputs a Doppler intermediate frequency signal corresponding to the frequency/phase difference between the excitation signal and the echo signal, wherein the utility model combines the adjustment of the sensitivity of the microwave detection device with adjustable excitation signal amplitude on the basis of the adjustment of the effective amplitude of the excitation signal, avoids the response of the energy density distribution of the microwave beam to the change of the effective amplitude of the excitation signal when the effective amplitude of the excitation signal is independently adjusted, and the response of the energy density distribution of the microwave beam to the change of the excitation signal tends to be gentle in a state that the effective amplitude of the excitation signal is larger than the maximum amplitude of a certain amplitude section or smaller than the minimum amplitude of a certain amplitude section, the responsiveness of the gradient boundary of the actual detection space to the change of the excitation signal amplitude tends to be gentle, so that the adjustment range of the actual detection space is limited and the gradient boundary is used as a boundary, and therefore the gradient boundary cannot be stably adapted to defects of different target detection spaces.

It is an object of the present utility model to provide a microwave detection device with an adjustable excitation signal amplitude, wherein the microwave detection device with an adjustable excitation signal amplitude comprises an intermediate frequency signal adjustment unit, wherein the intermediate frequency signal adjustment unit is communicatively connected to the MCU, wherein the mechanical switch unit further comprises at least one set of sensitivity adjustment switches, wherein the set of sensitivity adjustment switches comprises at least two sensitivity adjustment switches for corresponding voltage changes forming an input of the switch state identification unit based on state changes of the sensitivity adjustment switches, wherein the switch state identification unit is arranged to generate the corresponding digital signal based on a voltage of its input, the digital signal reflects a selection of a corresponding excitation signal amplitude gradation and a selection of a sensitivity gradation at the excitation signal amplitude gradation, respectively, by the state of the mechanical switch unit, wherein the logic processing unit correspondingly selects a corresponding excitation signal amplitude gradation and selects a corresponding sensitivity gradation based on the digital signal, wherein the intermediate frequency signal adjustment unit is electrically connected to the mixing unit for setting the corresponding voltage changes forming the input of the switch state identification unit based on the state of the voltage of the input of the microwave detection device with the corresponding excitation signal amplitude adjustable by the doppler settings of the sensitivity adjustment device.

An object of the present utility model is to provide a microwave detection device with an adjustable excitation signal amplitude, wherein the mechanical switch unit is provided with at least one set of the amplitude adjustment switches and at least one set of the sensitivity adjustment switches, wherein the state change of the amplitude adjustment switches corresponds to a plurality of excitation signal amplitude classifications of the MCU, wherein the state change of the sensitivity adjustment switches corresponds to a plurality of sensitivity classifications of the MCU, so that the setting of a plurality of sets of switches can be combined to set the effective amplitude of the excitation signal and the sensitivity of the microwave detection device with an adjustable excitation signal amplitude, respectively, so that the adjustment of the actual detection space of the microwave detection device with an adjustable excitation signal amplitude is facilitated.

According to one aspect of the present utility model, there is provided a microwave detection device with an adjustable excitation signal amplitude, wherein the microwave detection device with an adjustable excitation signal amplitude comprises:

an antenna unit;

the microwave chip comprises a voltage-controlled oscillation unit, a digital logic control unit, an amplitude adjusting unit and a second communication unit, wherein the digital logic control unit is electrically connected with the voltage-controlled oscillation unit, the amplitude adjusting unit and the second communication unit respectively;

An MCU, wherein the MCU comprises a switch state identification unit, a logic processing unit and a first communication unit, wherein the input end of the switch state identification unit is provided with a mechanical switch unit, the switch state identification unit is provided with a corresponding digital signal for identifying the state of the mechanical switch unit, the logic processing unit is electrically connected with the switch state identification unit and correspondingly selects corresponding excitation signal amplitude gradation based on the digital signal and processes the selected excitation signal amplitude gradation into a gradation control signal which can be identified by the digital logic control unit, the first communication unit is electrically connected with the logic processing unit and is communicatively connected with the second communication unit so as to send the gradation control signal to the second communication unit, the digital logic control unit is provided with a voltage-controlled oscillation unit and an amplitude adjustment unit which are controlled by the digital logic control unit to output an excitation signal with corresponding frequency, the amplitude adjustment unit is electrically connected with the voltage-controlled oscillation unit and is controlled by the digital logic control unit to output the amplitude of the excitation signal from the digital logic control unit to the voltage-controlled oscillation unit to effectively output the amplitude of the excitation signal from the digital logic control unit;

A mixing unit, wherein an output end of the amplitude adjusting unit is connected to the antenna unit by feeding to output the excitation signal to feed the antenna unit, wherein the antenna unit emits a microwave beam corresponding to a frequency of the excitation signal in a fed state to form an actual detection space, and receives a reflected echo formed by the microwave beam being reflected by a corresponding object in the actual detection space to transmit an echo signal corresponding to the reflected echo to the mixing unit, wherein the mixing unit is electrically connected to the voltage-controlled oscillation unit, wherein the mixing unit outputs a Doppler intermediate frequency signal corresponding to a frequency/phase difference between the excitation signal and the echo signal;

the intermediate frequency amplifying unit is electrically connected with the mixing unit to amplify the Doppler intermediate frequency signal; and

the signal processing unit is electrically connected to the intermediate frequency amplifying unit and the logic processing unit and is configured to extract the effective characteristics of the Doppler intermediate frequency signal, and the logic processing unit generates control instructions for the corresponding electrical equipment based on the effective characteristics of the Doppler intermediate frequency signal.

In an embodiment of the utility model, the mechanical switching unit comprises at least one set of amplitude-regulating switches, wherein the set of amplitude-regulating switches comprises at least two amplitude-regulating switches to correspond to a voltage change at an input forming the switching-state identifying unit based on a state change of the amplitude-regulating switches, wherein the switching-state identifying unit is arranged to generate the corresponding digital signal based on a voltage at its input.

In an embodiment of the utility model, the mechanical switch unit further comprises at least one set of sensitivity adjustment switches, wherein the set of sensitivity adjustment switches comprises at least two sensitivity adjustment switches, wherein the logic processing unit correspondingly selects a respective excitation signal amplitude stage and selects a respective sensitivity stage based on the digital signal, wherein the excitation signal amplitude adjustable microwave detection device further comprises an intermediate frequency signal adjustment unit, wherein the intermediate frequency signal adjustment unit is arranged between the mixing unit and the intermediate frequency amplifying unit and is controllably electrically connected to the logic processing unit by the logic processing unit, wherein the logic processing unit is arranged to control the transmission efficiency of the intermediate frequency signal adjustment unit when transmitting the doppler intermediate frequency signal from the mixing unit to the intermediate frequency amplifying unit based on the selected sensitivity stage, thereby forming a setting of the sensitivity of the excitation signal amplitude adjustable microwave detection device.

In an embodiment of the utility model, the mechanical switch unit further comprises at least one set of sensitivity adjustment switches, wherein the set of sensitivity adjustment switches comprises at least two sensitivity adjustment switches, wherein the logic processing unit correspondingly selects a corresponding excitation signal amplitude stage and selects a corresponding sensitivity stage based on the digital signal, wherein the excitation signal amplitude adjustable microwave detection device further comprises an intermediate frequency signal adjustment unit, wherein the intermediate frequency signal adjustment unit is arranged between the intermediate frequency amplifying unit and the signal processing unit and is electrically connected to the logic processing unit under the control of the logic processing unit, wherein the logic processing unit is arranged to control the transmission efficiency of the intermediate frequency signal adjustment unit when transmitting the doppler intermediate frequency signal from the intermediate frequency amplifying unit to the signal processing unit based on the selected sensitivity stage, thereby forming a setting of the sensitivity of the excitation signal amplitude adjustable microwave detection device.

In an embodiment of the utility model, the mechanical switch unit further comprises at least one set of sensitivity adjustment switches, wherein the set of sensitivity adjustment switches comprises at least two sensitivity adjustment switches, wherein the logic processing unit correspondingly selects a respective excitation signal amplitude stage and selects a respective sensitivity stage based on the digital signal, and further processes the selected sensitivity stage into the stage control signal, wherein the excitation signal amplitude adjustable microwave detection device further comprises an adjustable amplifier, wherein the adjustable amplifier is arranged between the antenna unit and the mixing unit and is electrically connected to the digital logic control unit under the control of the digital logic control unit, wherein the digital logic control unit controls the amplification factor of the adjustable amplifier on the echo signal in accordance with the stage control signal, thereby forming a setting of the sensitivity of the excitation signal amplitude adjustable microwave detection device.

In an embodiment of the utility model, the mechanical switch unit further comprises at least one set of sensitivity adjustment switches, wherein the set of sensitivity adjustment switches comprises at least two sensitivity adjustment switches, wherein the logic processing unit correspondingly selects a corresponding excitation signal amplitude classification and selects a corresponding sensitivity classification based on the digital signal, and further processes the selected sensitivity classification into the classification control signal, wherein the digital logic control unit is further electrically connected to the intermediate frequency amplifying unit, and controls the amplification factor of the intermediate frequency amplifying unit according to the classification control signal, thereby forming a setting of the sensitivity of the microwave detection device with adjustable excitation signal amplitude.

In an embodiment of the utility model, the mechanical switch unit further comprises at least one set of sensitivity adjustment switches, wherein the set of sensitivity adjustment switches comprises at least two sensitivity adjustment switches, wherein the microwave detection device with adjustable excitation signal amplitude further comprises an intermediate frequency signal adjustment unit, wherein the intermediate frequency signal adjustment unit is arranged between the mixing unit and the intermediate frequency amplifying unit, wherein the intermediate frequency signal adjustment unit is electrically connected to the sensitivity adjustment switches, and the on and off of the sensitivity adjustment switches form a control of the transmission efficiency of the intermediate frequency signal adjustment unit when the doppler intermediate frequency signal is transmitted from the mixing unit to the intermediate frequency amplifying unit, thereby forming a setting of the sensitivity of the microwave detection device with adjustable excitation signal amplitude.

In an embodiment of the utility model, the mechanical switch unit further comprises at least one set of sensitivity adjustment switches, wherein the set of sensitivity adjustment switches comprises at least two sensitivity adjustment switches, wherein the microwave detection device with adjustable excitation signal amplitude further comprises an intermediate frequency signal adjustment unit, and the on and off of the sensitivity adjustment switches form a control of the transmission efficiency of the intermediate frequency signal adjustment unit when the doppler intermediate frequency signal is transmitted from the intermediate frequency amplification unit to the signal processing unit, so as to form a setting of the sensitivity of the microwave detection device with adjustable excitation signal amplitude.

In an embodiment of the present utility model, the amplitude adjusting switches in the same group are arranged in series and/or parallel, and the sensitivity adjusting switches in the same group are arranged in series and/or parallel.

In an embodiment of the utility model, wherein the mechanical switch unit is arranged as a dial switch, a rotary multi-gear switch, a dial switch or a coded switch.

In an embodiment of the utility model, wherein the signal processing unit is integrated in the MCU.

In an embodiment of the utility model, the mixing unit and/or the intermediate frequency signal conditioning unit and/or the intermediate frequency amplifying unit are integrated in the microwave chip.

Further objects and advantages of the present utility model will become fully apparent from the following description and the accompanying drawings.

Drawings

Fig. 1A is a schematic block diagram of a microwave detection device with adjustable excitation signal amplitude according to an embodiment of the utility model when a transceiver antenna unit is used.

Fig. 1B is a schematic block diagram of a microwave chip with adjustable excitation signal amplitude according to the above embodiment of the utility model when a transceiver separated antenna unit is used.

Fig. 2 is a schematic block diagram of a modified embodiment of the microwave detection device with adjustable excitation signal amplitude according to the above embodiment of the present utility model.

Fig. 3A is a schematic block diagram of a modified embodiment of the microwave detection device with adjustable excitation signal amplitude according to the above embodiment of the utility model.

Fig. 3B is a schematic block diagram of a modified embodiment of the microwave detection device with adjustable excitation signal amplitude according to the above embodiment of the utility model.

Fig. 3C is a schematic block diagram illustrating a modified embodiment of the microwave detection device with adjustable excitation signal amplitude according to the above embodiment of the utility model.

Fig. 3D is a schematic diagram of a partial circuit structure of the microwave detection device with adjustable excitation signal amplitude according to the schematic diagram of fig. 3C.

Fig. 3E is a schematic block diagram of a modified embodiment of the microwave detection device with adjustable excitation signal amplitude according to the above embodiment of the utility model.

Fig. 3F is a schematic diagram of a partial circuit structure of the microwave detection device with adjustable excitation signal amplitude according to fig. 3E.

Fig. 4A is a schematic block diagram of a modified embodiment of the microwave detection device with adjustable excitation signal amplitude according to the above embodiment of the utility model.

Fig. 4B is a schematic block diagram of a modified embodiment of the microwave detection device with adjustable excitation signal amplitude according to the above embodiment of the utility model.

Fig. 4C is a schematic block diagram of a modified embodiment of the microwave detection device with adjustable excitation signal amplitude according to the above embodiment of the utility model.

Fig. 5 is a schematic block diagram of a modified embodiment of the microwave detection device with adjustable excitation signal amplitude according to the above embodiment of the present utility model.

Fig. 6A is an equivalent schematic circuit diagram of an alternative embodiment of a mechanical switching unit of the microwave detection device with adjustable excitation signal amplitude according to the above embodiment of the present utility model.

Fig. 6B is an equivalent schematic circuit diagram of an alternative implementation of the mechanical switching unit of the microwave detection device with adjustable excitation signal amplitude according to the above embodiment of the present utility model.

Fig. 6C is an equivalent schematic circuit diagram of an alternative implementation of the mechanical switching unit of the microwave detection device with adjustable excitation signal amplitude according to the above embodiment of the present utility model.

Fig. 6D is an equivalent schematic circuit diagram of an alternative implementation of the mechanical switching unit of the microwave detection device with adjustable excitation signal amplitude according to the above embodiment of the present utility model.

Fig. 7A is a schematic structural diagram of an alternative implementation structure of the mechanical switch unit of the microwave detection device with adjustable excitation signal amplitude according to the above embodiment of the present utility model.

Fig. 7B is a schematic structural diagram of an alternative implementation structure of the mechanical switch unit of the microwave detection device with adjustable excitation signal amplitude according to the above embodiment of the present utility model.

Fig. 7C is a schematic structural diagram of an alternative implementation structure of the mechanical switch unit of the microwave detection device with adjustable excitation signal amplitude according to the above embodiment of the present utility model.

Fig. 7D is a schematic structural diagram of an alternative implementation structure of the mechanical switch unit of the microwave detection device with adjustable excitation signal amplitude according to the above embodiment of the present utility model.

Fig. 7E is a schematic structural diagram of an alternative implementation structure of the mechanical switch unit of the microwave detection device with adjustable excitation signal amplitude according to the above embodiment of the present utility model.

Fig. 8 is a schematic view of a partial appearance of the microwave detection device with adjustable excitation signal amplitude according to the above embodiment of the utility model, which mainly shows an adjustment reference table of the microwave detection device with adjustable excitation signal amplitude.

Fig. 9 is a schematic view of a partial appearance of the microwave detection device with adjustable excitation signal amplitude according to the above embodiment of the utility model, which mainly shows an adjustment reference table of the microwave detection device with adjustable excitation signal amplitude.

Fig. 10 is a schematic view of a partial appearance of the microwave detection device with adjustable excitation signal amplitude according to the above embodiment of the utility model, which mainly shows an adjustment reference table of the microwave detection device with adjustable excitation signal amplitude.

Fig. 11 is a schematic view of a partial appearance of the microwave detection device with adjustable excitation signal amplitude according to the above embodiment of the utility model, which mainly shows an adjustment reference table of the microwave detection device with adjustable excitation signal amplitude.

Fig. 12 is a schematic view of a partial appearance of the microwave detection device with adjustable excitation signal amplitude according to the above embodiment of the utility model, which mainly shows an adjustment reference table of the microwave detection device with adjustable excitation signal amplitude.

Fig. 13 is a schematic view of a partial appearance of the microwave detection device with adjustable excitation signal amplitude according to the above embodiment of the utility model, which mainly shows an adjustment reference table of the microwave detection device with adjustable excitation signal amplitude.

Fig. 14 is a schematic view of a partial external appearance of the microwave detection device with adjustable excitation signal amplitude according to the above embodiment of the utility model, which mainly shows an adjustment reference table of the microwave detection device with adjustable excitation signal amplitude.

Fig. 15 is a schematic view of a partial appearance of the microwave detection device with adjustable excitation signal amplitude according to the above embodiment of the utility model, which mainly shows an adjustment reference table of the microwave detection device with adjustable excitation signal amplitude.

Fig. 16 is a schematic view of a partial external appearance of the microwave detection device with adjustable excitation signal amplitude according to the above embodiment of the utility model, which mainly shows an adjustment reference table of the microwave detection device with adjustable excitation signal amplitude.

Fig. 17 is a schematic view of a partial external appearance of the microwave detection device with adjustable excitation signal amplitude according to the above embodiment of the utility model, which mainly shows an adjustment reference table of the microwave detection device with adjustable excitation signal amplitude.

Fig. 18 is a schematic view of a partial appearance of the microwave detection device with adjustable excitation signal amplitude according to the above embodiment of the utility model, which mainly shows an adjustment reference table of the microwave detection device with adjustable excitation signal amplitude.

Fig. 19 is a schematic view of a partial appearance of the microwave detection device with adjustable excitation signal amplitude according to the above embodiment of the utility model, which mainly shows an adjustment reference table of the microwave detection device with adjustable excitation signal amplitude.

Fig. 20 is a schematic view of a partial appearance of the microwave detection device with adjustable excitation signal amplitude according to the above embodiment of the utility model, which mainly shows an adjustment reference table of the microwave detection device with adjustable excitation signal amplitude.

Fig. 21 is a schematic view of a partial appearance of the microwave detection device with adjustable excitation signal amplitude according to the above embodiment of the utility model, which mainly shows an adjustment reference table of the microwave detection device with adjustable excitation signal amplitude.

Fig. 22 is a schematic view of a partial external appearance of the microwave detection device with adjustable excitation signal amplitude according to the above embodiment of the utility model, which mainly shows an adjustment reference table of the microwave detection device with adjustable excitation signal amplitude.

Detailed Description

The following description is presented to enable one of ordinary skill in the art to make and use the utility model. The preferred embodiments in the following description are by way of example only and other obvious variations will occur to those skilled in the art. The basic principles of the utility model 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 utility model.

It will be appreciated by those skilled in the art that in the present disclosure, the terms "vertical," "transverse," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," etc. refer to an orientation or positional relationship based on that shown in the drawings, which is merely for convenience of description and to simplify the description, and do not indicate or imply that the apparatus or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore the above terms should not be construed as limiting the present utility model.

It will be understood that the terms "a" and "an" should be interpreted as referring to "at least one" or "one or more," i.e., in one embodiment, the number of elements may be one, while in another embodiment, the number of elements may be plural, and the term "a" should not be interpreted as limiting the number.

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically connected, electrically connected or can be communicated with each other; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

Referring to fig. 1A and 1B of the drawings in the specification of the present utility model, a block diagram of a microwave detection device with adjustable excitation signal amplitude according to an embodiment of the present utility model is illustrated, where the microwave detection device with adjustable excitation signal amplitude can adjust the effective amplitude of the excitation signal, so as to adjust the gradient boundary of the microwave beam to adjust the actual detection space of the microwave detection device with adjustable excitation signal amplitude, correspondingly ensure the stability of the microwave detection device with adjustable excitation signal amplitude in practical application, based on the correlation between the effective amplitude of the excitation signal and the energy density distribution of the microwave beam emitted by the microwave detection device with adjustable excitation signal amplitude.

Specifically, wherein the microwave detection device with adjustable excitation signal amplitude comprises a mechanical switching unit 10, an MCU 20, a microwave chip 30, a mixing unit 40 and an antenna unit 50, wherein the microwave chip 30 is arranged to generate the excitation signal in a powered state, wherein the MCU 20 is communicatively connected to the microwave chip 30 and is provided with a plurality of excitation signal amplitude steps corresponding to the excitation signal generated by the microwave chip 30 to set the effective amplitude of the excitation signal generated by the microwave chip 30 based on the corresponding excitation signal amplitude step, thereby enabling an effective amplitude adjustment of the excitation signal, wherein the MCU 20 comprises a switch state identification unit 21, a logic processing unit 22 and a first communication unit 23, wherein the microwave chip 30 comprises a voltage controlled oscillation unit 33, a digital logic control unit 32, an amplitude adjustment unit 34 and a second communication unit 31, wherein the mechanical switching unit 10 is arranged to be arranged to the input of the switch state identification unit 21 of the MCU 20, the switch state identification unit 21 is arranged to be electrically connected to the digital logic processing unit 22 and to the digital processing unit 23, wherein the switch state identification unit 21 is arranged to be electrically connected to the digital processing unit corresponding to the digital processing unit 30, wherein the switch state identification unit is electrically connected to the digital processing unit 22 and the microwave chip identification unit is electrically connected to the digital processing unit 30, the second communication unit 31 is connected to the hierarchical control signal, wherein the second communication unit 31 is electrically connected to the hierarchical control signal, the digital logic control unit 32 is electrically connected to the voltage-controlled oscillation unit 33, the amplitude adjustment unit 34 and the second communication unit 31 respectively, and is configured to control the voltage-controlled oscillation unit 33 and the amplitude adjustment unit 34 according to the hierarchical control signal, wherein the voltage-controlled oscillation unit 33 is controlled by the digital logic control unit 32 to output the excitation signal with corresponding frequency, wherein the amplitude adjustment unit 34 is electrically connected to the voltage-controlled oscillation unit 33 and is controlled by the digital logic control unit 32 to adjust the effective amplitude of the excitation signal output by the voltage-controlled oscillation unit 33 according to the hierarchical control signal, so that the effective amplitude of the excitation signal output from the output end of the amplitude adjustment unit 34 after being processed by the amplitude adjustment unit 34 meets the state setting of the mechanical switch unit 10, so that the detected signal based on the setting of the mechanical switch unit 10 can be adjusted effectively to the detected by the digital logic control unit 32, and the actual amplitude of the microwave device can be adjusted conveniently.

Further, wherein the output of the amplitude adjustment unit 34 is fed to the antenna unit 50 for outputting a doppler intermediate frequency signal corresponding to a frequency/phase difference between the excitation signal and the echo signal, wherein the antenna unit 50 emits a microwave beam corresponding to the frequency of the excitation signal in fed state for forming an actual detection space, and receives a reflected echo formed by the reflection of the microwave beam by a corresponding object in the actual detection space for transmitting an echo signal corresponding to the reflected echo to the mixing unit 40, wherein the mixing unit 40 is electrically connected to the voltage controlled oscillation unit 33 for accessing the excitation signal outputted by the voltage controlled oscillation unit 33, wherein the mixing unit 40 outputs a doppler intermediate frequency signal corresponding to a frequency/phase difference between the excitation signal and the echo signal, wherein the microwave detection device further comprises an intermediate frequency amplifying unit 60, a signal processing unit 70 and a control unit 80, wherein the intermediate frequency amplifying unit 60 is electrically connected to the mixing unit 40 for amplifying the doppler intermediate frequency signal, wherein the intermediate frequency signal processing unit 70 is electrically connected to the doppler processing unit 22 and the logic unit 22 is electrically connected to the logic processing unit 22, wherein the logic processing unit is electrically connected to the logic processing unit 22, to receive the control instructions generated by the logic processing unit 22 based on the effective characteristics of the doppler intermediate frequency signal and to perform corresponding operations.

Specifically, corresponding to fig. 1A, the antenna unit 50 is exemplified in a transceiving mode, and the antenna unit 50 is electrically connected to the mixing unit 40 while being fed to the amplitude adjusting unit 34, so as to transmit the microwave beam while being fed by the excitation signal outputted from the amplitude adjusting unit 34 as a transmitting antenna, and to transmit the echo signal corresponding to the reflected echo to the mixing unit 40 while receiving the reflected echo formed by the reflection of the microwave beam by the corresponding object in the real detection space as a receiving antenna. Corresponding to fig. 1B, the antenna unit 50 is illustrated in a separated mode, and the antenna unit 50 is electrically connected to the mixing unit 40 in a state of being electrically connected to the amplitude adjusting unit 34, wherein the antenna unit 50 has a transmitting feeding point connected to the amplitude adjusting unit 34 and a receiving feeding point electrically connected to the mixing unit 40, at which the excitation signal outputted from the amplitude adjusting unit 34 is fed, and the echo signal corresponding to the reflected echo is transmitted to the mixing unit 40, in a state that the antenna unit 50 is disposed in a separated mode, at which the antenna unit 50 has a transmitting feeding point connected to the amplitude adjusting unit 34 and a receiving feeding point electrically connected to the mixing unit 40.

That is, in these embodiments of the present utility model, the antenna unit 50 may be an antenna in a form of transmitting and receiving as shown in fig. 1A or an antenna in a form of transmitting and receiving as shown in fig. 1B, which is not limited thereto.

It should be noted that, the step selection of the MCU20 for the amplitude of the corresponding excitation signal does not change the frequency of the excitation signal output by the voltage-controlled oscillation unit 33 of the microwave chip 30, nor affect the impedance matching between the microwave chip 30 and the antenna unit 50, i.e. the connection relationship between the MCU20 and the microwave chip 30 can maintain the independence of the operating frequency and the impedance of the microwave chip 30, so that the method is suitable for microwave detection based on the doppler effect principle.

In particular, if the connection relationship between the MCU20 and the microwave chip 30 can maintain the independence of the operating frequency and the impedance of the microwave chip 30, the output efficiency of the output of the excitation signal by the voltage-controlled oscillating unit 33 of the microwave chip 30 is not changed when the MCU20 performs the step selection on the amplitude of the corresponding excitation signal, so that the radiation power consumption of the microwave detection device with adjustable excitation signal amplitude can be adjusted with the same output efficiency based on the step selection on the amplitude of the corresponding excitation signal of the MCU20, and the overall power consumption of the microwave detection device with adjustable excitation signal amplitude is reduced when the actual detection space of the microwave detection device with adjustable excitation signal amplitude is matched with the target detection space based on the adjustment of the effective amplitude of the excitation signal.

It should be noted that, in this embodiment, the signal processing unit 70 is integrated in the MCU 20, and the intermediate frequency amplifying unit 60 is integrated in the microwave chip 30, so as to facilitate the improvement of the circuit integration degree of the microwave detection device with adjustable excitation signal amplitude, and thus facilitate the debugging and installation of the microwave detection device with adjustable excitation signal amplitude.

Further, for the purpose of improving the circuit integration degree of the excitation signal amplitude-adjustable microwave detection device, referring to fig. 2 of the drawings of the specification of the present utility model, a block diagram of a modified embodiment of the excitation signal amplitude-adjustable microwave detection device is illustrated, in this modified embodiment, the mixing unit 40 is integrated with the microwave chip 30 in an integrated circuit form, so as to improve the circuit integration degree of the excitation signal amplitude-adjustable microwave detection device, thereby facilitating the debugging and installation of the excitation signal amplitude-adjustable microwave detection device, simplifying the production process of the excitation signal amplitude-adjustable microwave detection device, and further reducing the production cost of the excitation signal amplitude-adjustable microwave detection device.

Furthermore, the sensitivity of the microwave detection device with the adjustable excitation signal amplitude is adjusted in a combined manner on the basis of adjusting the effective amplitude of the excitation signal, so that the defect that the response of the energy density distribution of the microwave beam to the change of the excitation signal amplitude tends to be gentle on the basis of the response of the energy density distribution of the microwave beam to the change of the excitation signal amplitude when the effective amplitude of the excitation signal is independently adjusted is avoided, and the defect that the adjustment range of the actual detection space is limited and the change of the excitation signal amplitude is limited by the gradient boundary so as to be unable to be stably adapted to different target detection spaces is overcome in a state that the effective amplitude of the excitation signal is larger than the maximum amplitude of a certain amplitude section or smaller than the minimum amplitude of a certain amplitude section.

In particular, referring to fig. 3A and 3B of the drawings of the specification of the present utility model, the microwave detection device with adjustable excitation signal amplitude comprises an intermediate frequency signal adjusting unit 90, wherein the intermediate frequency signal adjusting unit 90 is electrically connected to the MCU 20, wherein the logic processing unit 22 of the MCU 20 correspondingly selects a corresponding excitation signal amplitude gradation and selects a corresponding sensitivity gradation based on the digital signal, wherein the intermediate frequency signal adjusting unit 90 is electrically connected to the mixing unit 40 to adjust the transmission efficiency of the doppler intermediate frequency signal in a setting selected by the gradation of the MCU 20, thereby forming a setting of the sensitivity of the microwave detection device with adjustable excitation signal amplitude.

Corresponding to fig. 3A, wherein the intermediate frequency signal adjusting unit 90 is disposed between the mixing unit 40 and the intermediate frequency amplifying unit 60 and is electrically connected to the logic processing unit 22 under the control of the logic processing unit 22, wherein the logic processing unit 22 is configured to control the transmission efficiency of the intermediate frequency signal adjusting unit 90 when the doppler intermediate frequency signal is transmitted from the mixing unit to the intermediate frequency amplifying unit 60 based on the selected sensitivity stage, thereby forming a setting of the sensitivity of the microwave detection device with adjustable excitation signal amplitude.

Corresponding to fig. 3B, wherein the intermediate frequency signal adjusting unit 90 is electrically connected to the mixing unit 40 via the intermediate frequency amplifying unit 60, specifically the intermediate frequency signal adjusting unit 90 is disposed between the intermediate frequency amplifying unit 60 and the signal processing unit 70 and is electrically connected to the logic processing unit 22 under the control of the logic processing unit 22, wherein the logic processing unit 22 is configured to control the transmission efficiency of the intermediate frequency signal adjusting unit 90 when the doppler intermediate frequency signal is transmitted from the intermediate frequency amplifying unit 60 to the signal processing unit 70 based on the selected sensitivity stage, thereby forming a setting of the sensitivity of the microwave detection device with adjustable excitation signal amplitude.

It is to be understood that understanding of the conveying efficiency of the intermediate frequency signal adjusting unit 90 from the mixing unit 40 to the intermediate frequency amplifying unit 60 should include the output efficiency of the mixing unit 40 to output the doppler intermediate frequency signal and the conveying efficiency of the doppler intermediate frequency signal to the intermediate frequency amplifying unit 60, and that understanding of the conveying efficiency of the doppler intermediate frequency signal from the intermediate frequency amplifying unit 60 to the signal processing unit 70 should include the output efficiency of the intermediate frequency amplifying unit 60 to output the doppler intermediate frequency signal and the conveying efficiency of the doppler intermediate frequency signal to the signal processing unit 70, corresponding to the state in which the intermediate frequency signal adjusting unit 90 is provided between the intermediate frequency amplifying unit 60 and the signal processing unit 70.

It should be noted that, in fig. 3A or 3B, the intermediate frequency signal adjusting unit 90 is disposed separately from the microwave chip 30, but it is understood that whether the intermediate frequency signal adjusting unit 90 is integrated into the microwave chip 30 is not limited to the illustration of the present utility model, as in the circuit connection relationship where the intermediate frequency signal adjusting unit 90 is disposed between the mixing unit 40 and the intermediate frequency amplifying unit 60 corresponding to fig. 3A, and in the circuit connection relationship where the intermediate frequency signal adjusting unit 90 is disposed between the intermediate frequency amplifying unit 60 and the signal processing unit 70 corresponding to fig. 3B, the intermediate frequency signal adjusting unit 90 may be integrated into the microwave chip 30.

With further reference to fig. 4A to 4C, the logic processing unit 22 processes the selected sensitivity level into the level control signal, i.e. the level control signal comprises a sensitivity level and an excitation signal amplitude level, wherein the excitation signal amplitude adjustable microwave detection device further comprises an adjustable amplifier 90A, wherein the adjustable amplifier 90A is arranged between the antenna unit 50 and the mixing unit 40 and is electrically connected to the digital logic control unit 32 under the control of the digital logic control unit 32, wherein the digital logic control unit 32 controls the amplification factor of the echo signal by the adjustable amplifier 90A according to the level control signal, thereby equivalently forming a setting of the sensitivity of the excitation signal amplitude adjustable microwave detection device.

Specifically, corresponding to fig. 4A, the antenna unit 50 is configured in a transmit-receive mode, and the adjustable amplifier 90A is disposed between the antenna unit 50 and the mixer unit 40 and processes the echo signal under the control of the digital logic control unit 32.

Corresponding to fig. 4B, wherein the antenna unit 50 is arranged in a transception-split configuration, wherein the adjustable amplifier 90A is arranged between the receiving feed point of the antenna unit 50 and the mixing unit 40 and processes the echo signal under the control of the digital logic control unit 32.

Corresponding to fig. 4C, the adjustable amplifier 90A is integrated with the microwave chip 30 in the form of an integrated circuit, so as to improve the circuit integration degree of the microwave detection device with adjustable excitation signal amplitude.

With further reference to fig. 5, the logic processing unit 22 processes the selected sensitivity level into the level control signal, i.e. the level control signal comprises a sensitivity level and an excitation signal amplitude level, wherein the digital logic control unit 32 is further electrically connected to the intermediate frequency amplifying unit 60 and controls the amplification factor of the intermediate frequency amplifying unit 60 according to the level control signal, thereby forming a setting of the sensitivity of the excitation signal amplitude adjustable microwave detection device.

It should be noted that, in some embodiments, the logic processing unit 22 adjusts the threshold setting of the doppler intermediate frequency signal in the frequency spectrum, the energy spectrum, the power spectrum or the amplitude of the doppler intermediate frequency signal according to the selected sensitivity stage, so as to form the setting of the sensitivity of the microwave detection device with adjustable amplitude of the excitation signal.

Further, wherein the mechanical switching unit 10 comprises at least one set of amplitude adjustment switches 11, wherein the set of amplitude adjustment switches 11 comprises at least two amplitude adjustment switches 11 to correspond to a voltage change at an input terminal forming the switch state identification unit 21 based on a state change of the amplitude adjustment switches 11, wherein the switch state identification unit 21 is arranged to generate the corresponding digital signal based on a voltage at the input terminal thereof, such that the respective excitation signal amplitude classification is selected based on adjusting on or off of the amplitude adjustment switches 11, such that adjustment of the actual detection space of the excitation signal amplitude adjustable microwave detection device is facilitated.

In particular, the microwave detection device with adjustable amplitude of the excitation signal has a sensitivity adjustment function, wherein the mechanical switch unit 10 further comprises at least one set of sensitivity adjustment switches 12, wherein at least two sensitivity adjustment switches 12 are included in the set of sensitivity adjustment switches 12 to correspondingly form a voltage change of the input terminal of the switch state recognition unit 21 based on the state change of the sensitivity adjustment switches 12, wherein the switch state recognition unit 21 is arranged to generate the corresponding digital signal based on the voltage of the input terminal thereof, and the digital signal reflects the selection of the state of the mechanical switch unit 10 for the corresponding excitation signal amplitude gradation and the selection of the sensitivity gradation under the excitation signal amplitude gradation, respectively, and the logic processing unit 22 correspondingly selects the corresponding excitation signal amplitude gradation and the corresponding sensitivity gradation based on the digital signal.

It should be noted that, referring to fig. 3C and 3D, the intermediate frequency signal adjusting unit 90 is directly controlled by the sensitivity adjusting switch 12, where the intermediate frequency signal adjusting unit 90 is disposed between the mixing unit 40 and the intermediate frequency amplifying unit 60, the intermediate frequency signal adjusting unit 90 is electrically connected to the sensitivity adjusting switch 12, and on and off of the sensitivity adjusting switch 12 forms control of the transmission efficiency of the intermediate frequency signal adjusting unit 90 when the doppler intermediate frequency signal is transmitted from the mixing unit to the intermediate frequency amplifying unit 60, so as to form setting of the sensitivity of the microwave detecting device with adjustable excitation signal amplitude.

Also, referring to fig. 3E and 3F, in a state in which the intermediate frequency signal adjusting unit 90 is disposed between the intermediate frequency amplifying unit 60 and the signal processing unit 70, the intermediate frequency signal adjusting unit 90 can also be directly controlled by the sensitivity adjusting switch 12, the intermediate frequency signal adjusting unit 90 is electrically connected to the sensitivity adjusting switch 12, and the on and off of the sensitivity adjusting switch 12 forms control of the transmission efficiency of the intermediate frequency signal adjusting unit 90 when the doppler intermediate frequency signal is transmitted from the intermediate frequency amplifying unit 60 to the signal processing unit 70, thereby forming setting of the sensitivity of the microwave detection device with the adjustable excitation signal amplitude.

Referring specifically to fig. 6A to 6D of drawings in the specification of the present utility model, the equivalent schematic circuit diagrams of various alternative embodiments of the mechanical switch unit 10, specifically, corresponding to fig. 6A, each of the amplitude adjustment switches 11 and/or each of the sensitivity adjustment switches 12 is electrically connected to the input terminal of the switch state recognition unit 21, when each of the amplitude adjustment switches 11 and/or each of the sensitivity adjustment switches 12 is turned on, the input terminal corresponding to the switch state recognition unit 21 is at a low level, and when each of the amplitude adjustment switches 11 and/or each of the sensitivity adjustment switches 12 is turned off, the input terminal corresponding to the switch state recognition unit 21 is at a high level, so as to recognize the state of the mechanical switch unit 10.

Corresponding to fig. 6B, in which each of the amplitude adjustment switches 11 and/or each of the sensitivity adjustment switches 12 are provided in series to turn on or off a voltage change at an input terminal forming the switch state identifying unit 21 based on each of the amplitude adjustment switches 11 and/or each of the sensitivity adjustment switches 12, thereby enabling the switch state identifying unit 21 to identify the state of the mechanical switch unit 10.

Corresponding to fig. 6C, in which the amplitude adjustment switches 11 and/or the sensitivity adjustment switches 12 are arranged in parallel, so as to enable the switch state recognition unit 21 to recognize the state of the mechanical switch unit 10 based on the voltage variation of the input terminals of the switch state recognition unit 21 being turned on or off by the amplitude adjustment switches 11 and/or the sensitivity adjustment switches 12.

Corresponding to fig. 6D, in which the amplitude adjustment switches 11 and/or the sensitivity adjustment switches 12 are provided in a combination of series and parallel, to turn on or off the voltage variation forming the input terminal of the switching state identifying unit 21 based on the amplitude adjustment switches 11 and/or the sensitivity adjustment switches 12, thereby enabling the switching state identifying unit 21 to identify the state of the mechanical switching unit 10.

In particular, wherein the mechanical switch unit 10 is provided with at least one set of the amplitude adjustment switches 11 and at least one set of the sensitivity adjustment switches 12, wherein a state change of the amplitude adjustment switches 11 corresponds to a plurality of excitation signal amplitude gradations of the MCU 20, wherein a state change of the sensitivity adjustment switches 12 corresponds to a plurality of sensitivity gradations of the MCU 20, thereby enabling to set the effective amplitude of the excitation signal and the sensitivity of the excitation signal amplitude-adjustable microwave detection device respectively for a combination of settings of a plurality of sets of switches, so that adjustment of an actual detection space of the excitation signal amplitude-adjustable microwave detection device is facilitated.

Referring specifically to fig. 7A to 7E of the drawings of the present description of the utility model, various alternative implementations of the mechanical switching unit 10 are respectively illustrated, specifically wherein the mechanical switching unit 10 is provided as a dial switch, specifically corresponding to fig. 7A, wherein one key on the mechanical switching unit 10 operates a set of the amplitude adjusting switches 11 or a set of the sensitivity adjusting switches 12, respectively, so as to turn on or off each of the amplitude adjusting switches 11 and/or each of the sensitivity adjusting switches 12 based on the dial operation to form a voltage variation at the input terminal of the switching state identifying unit 21.

The mechanical switch unit 10 is specifically configured as a three-stage shift switch and a four-stage shift switch, respectively, corresponding to fig. 7B and 7C. The mechanical switching unit 10 is specifically configured as a coded switch, corresponding to fig. 7D. Corresponding to fig. 7E, the mechanical switching unit 10 is specifically configured as a rotary multi-stage switch.

It CAN be understood that, on the premise of adjusting the effective amplitude of the excitation signal by the mechanical switch unit 10, the sensitivity adjustment of the microwave detection device with adjustable excitation signal amplitude CAN be implemented in other manners, such as setting a digital switch device or an analog adjustment device, where the digital switch device includes a bluetooth module, a mesh, wiFi, zigbe, loRa module, a 868 radio frequency module, a 915 radio frequency module, a 433 radio frequency module, a DALI, KNX, PLC module of a wired communication module, a CAN BUS module, an RS485 module, an RS232 module, and the like, an NFC module, and the like; the analog adjustment device may be an adjustable potentiometer, as the utility model is not limited in this regard.

Further, according to the selection of the amplitude classification of the excitation signal corresponding to the on or off state change of each amplitude adjustment switch 11, an adjustment reference table 100 is designed and formed corresponding to the corresponding relation between the adjustment of the actual detection space of the microwave detection device with adjustable excitation signal amplitude, so that a user can adjust the on or off state of the amplitude adjustment switch 11 according to a target detection space of the microwave detection device with adjustable excitation signal amplitude against the adjustment reference table 100, and the actual detection space of the microwave detection device with adjustable excitation signal amplitude is matched with the target detection space against the target detection space.

For example, reference is made to fig. 8 to 22 of the drawings of the description of the utility model, wherein different adjustment reference tables 100 are respectively illustrated for different embodiments of the mechanical switching unit 10 and/or different application scenarios of the excitation signal amplitude adjustable microwave detection device, wherein fig. 8 to 22 illustrate the partial appearance of the excitation signal amplitude adjustable microwave detection device, the adjustment reference tables 100 being printed on the respective housings of the excitation signal amplitude adjustable microwave detection device, thereby facilitating the user to operate the mechanical switching unit 10 in relation to the adjustment reference tables 100 in terms of the actual target detection space of the excitation signal amplitude adjustable microwave detection device.

In particular, corresponding to fig. 8, the mechanical switch unit 10 is configured as a dial switch, wherein the adjustment reference table 100 directly corresponds to the applicable height of the microwave detection device with adjustable excitation signal amplitude in the state change of the mechanical switch unit 10, so that a user can operate the mechanical switch unit 10 according to the actual installation height and/or detection range against the adjustment reference table 100.

Corresponding to fig. 9, wherein the mechanical switch unit 10 is configured as a dial switch, wherein the adjustment reference table 100 directly corresponds to the applicable power of the microwave detection device with adjustable excitation signal amplitude with the state change of the mechanical switch unit 10, thereby facilitating the user to operate the mechanical switch unit 10 against the adjustment reference table 100.

Corresponding to fig. 10, wherein the mechanical switch unit 10 is configured as a dial switch, wherein the adjustment reference table 100 directly corresponds to the applicable area of the microwave detection device with adjustable excitation signal amplitude with the state change of the mechanical switch unit 10, thereby facilitating the user to operate the mechanical switch unit 10 against the adjustment reference table 100.

Corresponding to fig. 11, the mechanical switch unit 10 is configured as a dial switch, wherein the adjustment reference table 100 directly corresponds to an application scenario of the microwave detection device with adjustable excitation signal amplitude with a state change of the mechanical switch unit 10, so as to facilitate a user to operate the mechanical switch unit 10 against the adjustment reference table 100.

Corresponding to fig. 12, the mechanical switch unit 10 is configured as a dial switch and corresponds to a state that the microwave detection device with adjustable excitation signal amplitude has a sensitivity adjustment function, where the adjustment reference table 100 directly corresponds to the adaptation height of the microwave detection device with adjustable excitation signal amplitude with the state change of the mechanical switch unit 10, and further shows the correspondence between the state of the mechanical switch unit 10 and the sensitivity of the microwave detection device with adjustable excitation signal amplitude, so that a user can operate the mechanical switch unit 10 against the adjustment reference table 100.

Corresponding to fig. 13, the mechanical switch unit 10 is configured as a dial switch, and corresponds to a state that the microwave detection device with adjustable excitation signal amplitude has a sensitivity adjustment function, and the adjustment reference table 100 further shows a correspondence between the state of the mechanical switch unit 10 and the sensitivity of the microwave detection device with adjustable excitation signal amplitude while the state change of the mechanical switch unit 10 directly corresponds to the applicable power of the microwave detection device with adjustable excitation signal amplitude, so that a user can operate the mechanical switch unit 10 against the adjustment reference table 100.

Corresponding to fig. 14, wherein the mechanical switch unit 10 is configured as a dial switch, the adjustment reference table 100 directly corresponds to the applicable area and sensitivity of the microwave detection device with adjustable excitation signal amplitude with the state change of the mechanical switch unit 10, so as to facilitate the user to select a corresponding gear position against the adjustment reference table 100.

Corresponding to fig. 15, wherein the mechanical switch unit 10 is configured as a dial switch, the adjustment reference table 100 directly corresponds to an application scenario of the excitation signal amplitude-adjustable microwave detection device and a sensitivity of the excitation signal amplitude-adjustable microwave detection device with a state change of the mechanical switch unit 10, thereby facilitating a user to operate the mechanical switch unit 10 against the adjustment reference table 100.

Corresponding to fig. 16, wherein the mechanical switch unit 10 is configured as a shift switch, the adjustment reference table 100 directly corresponds to an applicable scenario of the microwave detection device with the adjustable excitation signal amplitude in a state change of the mechanical switch unit 10, so that a user can operate the mechanical switch unit 10 against the adjustment reference table 100.

Corresponding to fig. 17, in which the mechanical switch unit 10 is configured as a toggle switch and corresponds to a state in which the microwave detecting device with adjustable amplitude of the excitation signal has a sensitivity adjustment function, the mechanical switch unit 10 is configured with two toggle switches, the adjustment reference table 100 directly corresponds to an applicable scene of the microwave detecting device with adjustable amplitude of the excitation signal with a state change of one of the toggle switches and corresponds to a sensitivity of the microwave detecting device with adjustable amplitude of the excitation signal with a state change of the other toggle switch, thereby facilitating a user to operate the mechanical switch unit 10 against the adjustment reference table 100.

Corresponding to fig. 18, wherein the mechanical switching unit 10 is configured as a coded switch, the adjustment reference table 100 directly corresponds to the applicable area of the microwave detection device with the adjustable amplitude of the excitation signal with the state change of the mechanical switching unit 10, thereby facilitating the user to operate the mechanical switching unit 10 against the adjustment reference table 100.

Corresponding to fig. 19, in which the mechanical switch unit 10 is configured as a coded switch and corresponds to a state in which the microwave detecting device with adjustable amplitude of the excitation signal has a sensitivity adjustment function, the mechanical switch unit 10 is configured with two coded switches, the adjustment reference table 100 directly corresponds to the applicable area of the microwave detecting device with adjustable amplitude of the excitation signal with a change of state of one of the coded switches and corresponds to the sensitivity of the microwave detecting device with adjustable amplitude of the excitation signal with a change of state of the other coded switch, thereby facilitating the user to operate the mechanical switch unit 10 against the adjustment reference table 100.

Corresponding to fig. 20, the mechanical switch unit 10 is arranged in a combination of a code switch and a shift switch, the adjustment reference table 100 directly corresponds to the applicable area of the microwave detection device with adjustable excitation signal amplitude in terms of the state change of the code switch, and corresponds to the sensitivity of the microwave detection device with adjustable excitation signal amplitude in terms of the state change of the shift switch, so that the user can operate the mechanical switch unit 10 against the adjustment reference table 100.

Corresponding to fig. 21, wherein the mechanical switch unit 10 is configured as a rotary multi-stage switch, the adjustment reference table 100 directly corresponds to the applicable area of the microwave detection device with the adjustable amplitude of the excitation signal with the state change of the mechanical switch unit 10, thereby facilitating the user to operate the mechanical switch unit 10 against the adjustment reference table 100.

Corresponding to fig. 22, wherein the mechanical switch unit 10 is arranged in a combination of a rotary multi-stage switch and a dial switch, the adjustment reference table 100 directly corresponds to the applicable area of the microwave detection device with adjustable amplitude of the excitation signal in a state change of the rotary multi-stage switch, and corresponds to the sensitivity of the microwave detection device with adjustable amplitude of the excitation signal in a state change of the dial switch, so that a user can operate the mechanical switch unit 10 against the adjustment reference table 100.

It should be noted that, the present utility model creatively corresponds the state change of the mechanical switch unit 10 directly to a certain mode and/or applicable scene (height, area, etc.) of the microwave detection device with adjustable excitation signal amplitude, so that a user can directly adjust the state of the mechanical switch unit 10 against the adjustment reference table 100 based on an actual application scene, thereby enabling the debugging of the microwave detection device with adjustable excitation signal amplitude to be more simple and quick.

It should be understood that the exemplary representation of the adjustment reference table 100 is shown in the present utility model, and is not limited to the data of the actual representation of the adjustment reference table 100 as illustrated in the drawings of the present utility model, which mainly shows the design concept of the adjustment reference table 100, that is, the connection relationship and the structural relationship between the MCU 20 and the microwave chip 30 disclosed in the present utility model enables the effective amplitude adjustment of the excitation signal, and the design of a reference table is a reference table in contrast to the extension concept of the present utility model, so that the user can operate the mechanical switch unit 10 in contrast to the adjustment reference table 100 is creatively proposed in the present utility model.

Preferably, in practical applications, the adjustment reference table 100 is printed adjacent to the mechanical switch unit 10, so as to facilitate a user to operate the mechanical switch unit 10 according to an actual target detection space of the excitation signal amplitude-adjustable microwave detection device against the adjustment reference table 100, so that the actual detection space of the excitation signal amplitude-adjustable microwave detection device is matched with the target detection space against the target detection space, and the adjustment of the actual detection space of the excitation signal amplitude-adjustable microwave detection device is facilitated.

Those skilled in the art will appreciate that the embodiments of the utility model described above and shown in the drawings are by way of example only and not limiting. The objects of the present utility model have been fully and effectively achieved. The functional and structural principles of the present utility model have been shown and described in the examples and embodiments of the utility model may be modified or practiced without departing from the principles described.

Claims

1. The microwave detection device with adjustable excitation signal amplitude is characterized by comprising:

an antenna unit;

the signal processing unit is electrically connected to the intermediate frequency amplifying unit and the logic processing unit and is configured to extract the effective characteristics of the Doppler intermediate frequency signal, and the logic processing unit generates control instructions for corresponding electrical equipment based on the effective characteristics of the Doppler intermediate frequency signal.

2. The excitation signal amplitude adjustable microwave detection device according to claim 1, wherein the mechanical switching unit comprises at least one set of amplitude adjustment switches, wherein the set of amplitude adjustment switches comprises at least two amplitude adjustment switches to correspond to a voltage change at an input forming the switch state identification unit based on a state change of the amplitude adjustment switches, wherein the switch state identification unit is arranged to generate the corresponding digital signal based on a voltage at its input.

3. The excitation signal amplitude adjustable microwave detection device of claim 2, wherein the mechanical switching unit further comprises at least one set of sensitivity adjustment switches, wherein the set of sensitivity adjustment switches comprises at least two sensitivity adjustment switches, wherein the logic processing unit correspondingly selects a respective excitation signal amplitude stage and selects a respective sensitivity stage based on the digital signal, wherein the excitation signal amplitude adjustable microwave detection device further comprises an intermediate frequency signal adjustment unit, wherein the intermediate frequency signal adjustment unit is arranged between the mixing unit and the intermediate frequency amplifying unit and is controllably electrically connected to the logic processing unit by the logic processing unit, wherein the logic processing unit is arranged to control a conveying efficiency of the intermediate frequency signal adjustment unit when conveying the doppler intermediate frequency signal from the mixing unit to the intermediate frequency amplifying unit based on the selected sensitivity stage, thereby forming a setting of the sensitivity of the excitation signal amplitude adjustable microwave detection device.

4. The excitation signal amplitude adjustable microwave detection device of claim 2, wherein the mechanical switch unit further comprises at least one set of sensitivity adjustment switches, wherein the set of sensitivity adjustment switches comprises at least two sensitivity adjustment switches, wherein the logic processing unit correspondingly selects a respective excitation signal amplitude stage and selects a respective sensitivity stage based on the digital signal, wherein the excitation signal amplitude adjustable microwave detection device further comprises an intermediate frequency signal adjustment unit, wherein the intermediate frequency signal adjustment unit is disposed between the intermediate frequency amplification unit and the signal processing unit and is controllably electrically connected to the logic processing unit by the logic processing unit, wherein the logic processing unit is configured to control a conveying efficiency of the intermediate frequency signal adjustment unit when conveying the doppler intermediate frequency signal from the intermediate frequency amplification unit to the signal processing unit based on the selected sensitivity stage, thereby forming a setting of the sensitivity of the excitation signal amplitude adjustable microwave detection device.

5. The excitation signal amplitude adjustable microwave detection device of claim 2, wherein the mechanical switching unit further comprises at least one set of sensitivity adjustment switches, wherein the set of sensitivity adjustment switches comprises at least two sensitivity adjustment switches, wherein the logic processing unit correspondingly selects a respective excitation signal amplitude stage and selects a respective sensitivity stage based on the digital signal, and further processes the selected sensitivity stage into the stage control signal, wherein the excitation signal amplitude adjustable microwave detection device further comprises an adjustable amplifier, wherein the adjustable amplifier is disposed between the antenna unit and the mixing unit and is electrically connected to the digital logic control unit under control of the digital logic control unit, wherein the digital logic control unit controls the amplification of the echo signal by the adjustable amplifier in accordance with the stage control signal, thereby forming a setting of the sensitivity of the excitation signal amplitude adjustable microwave detection device.

6. The excitation signal amplitude adjustable microwave detection device of claim 2, wherein the mechanical switch unit further comprises at least one set of sensitivity adjustment switches, wherein the set of sensitivity adjustment switches comprises at least two sensitivity adjustment switches, wherein the logic processing unit correspondingly selects a corresponding excitation signal amplitude classification and selects a corresponding sensitivity classification based on the digital signal, and further processes the selected sensitivity classification into the classification control signal, wherein the digital logic control unit is further electrically connected to the intermediate frequency amplification unit, and controls the amplification of the intermediate frequency amplification unit in accordance with the classification control signal, thereby forming a setting of the sensitivity of the excitation signal amplitude adjustable microwave detection device.

7. The excitation signal amplitude adjustable microwave detection device of claim 2, wherein the mechanical switch unit further comprises at least one set of sensitivity adjustment switches, wherein the set of sensitivity adjustment switches comprises at least two sensitivity adjustment switches, wherein the excitation signal amplitude adjustable microwave detection device further comprises an intermediate frequency signal adjustment unit, wherein the intermediate frequency signal adjustment unit is arranged between the mixing unit and the intermediate frequency amplifying unit, wherein the intermediate frequency signal adjustment unit is electrically connected to the sensitivity adjustment switches, and the turning on and off of the sensitivity adjustment switches forms a control of a transmission efficiency of the intermediate frequency signal adjustment unit when transmitting the doppler intermediate frequency signal from the mixing unit to the intermediate frequency amplifying unit, thereby forming a setting of a sensitivity of the excitation signal amplitude adjustable microwave detection device.

8. The excitation signal amplitude adjustable microwave detection device of claim 2, wherein the mechanical switch unit further comprises at least one set of sensitivity adjustment switches, wherein the set of sensitivity adjustment switches comprises at least two sensitivity adjustment switches, wherein the excitation signal amplitude adjustable microwave detection device further comprises an intermediate frequency signal adjustment unit, wherein the intermediate frequency signal adjustment unit is arranged between the intermediate frequency amplification unit and the signal processing unit, the intermediate frequency signal adjustment unit is electrically connected to the sensitivity adjustment switches, and the turning on and off of the sensitivity adjustment switches forms a control of the transmission efficiency of the intermediate frequency signal adjustment unit when transmitting the doppler intermediate frequency signal from the intermediate frequency amplification unit to the signal processing unit, thereby forming a setting of the sensitivity of the excitation signal amplitude adjustable microwave detection device.

9. A microwave detection device according to any one of claims 3 to 8, wherein the amplitude adjustment switches in the same group are arranged in series and/or parallel, and the sensitivity adjustment switches in the same group are arranged in series and/or parallel.

10. The excitation signal amplitude adjustable microwave detection device according to any one of claims 1 to 8, wherein the mechanical switch unit is configured as a dial switch, a rotary multi-stage switch, a dial switch or a coded switch.

11. The excitation signal amplitude adjustable microwave detection device according to any one of claims 1 to 8, wherein the signal processing unit is integrated in the MCU.

12. The excitation signal amplitude adjustable microwave detection apparatus according to claim 3, 4, 7 or 8, wherein the mixing unit and/or the intermediate frequency signal conditioning unit and/or the intermediate frequency amplifying unit are integrated in the microwave chip.