CN219039355U - Microwave detection device with adjustable excitation signal amplitude - Google Patents

Microwave detection device with adjustable excitation signal amplitude Download PDF

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Publication number
CN219039355U
CN219039355U CN202223096950.8U CN202223096950U CN219039355U CN 219039355 U CN219039355 U CN 219039355U CN 202223096950 U CN202223096950 U CN 202223096950U CN 219039355 U CN219039355 U CN 219039355U
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China
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unit
excitation signal
intermediate frequency
detection device
signal amplitude
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CN202223096950.8U
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Chinese (zh)
Inventor
邹高迪
邹明志
邹新
邹亮
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Shenzhen Merrytek Technology Co Ltd
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Shenzhen Merrytek Technology Co Ltd
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
    • G01S13/02—Systems using reflection of radio waves, e.g. primary radar systems; Analogous systems
    • G01S13/04—Systems determining presence of a target
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
    • G01S13/02—Systems using reflection of radio waves, e.g. primary radar systems; Analogous systems
    • G01S13/50—Systems of measurement based on relative movement of target
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
    • G01S13/88—Radar or analogous systems specially adapted for specific applications
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S17/00—Systems using the reflection or reradiation of electromagnetic waves other than radio waves, e.g. lidar systems
    • G01S17/02—Systems using the reflection of electromagnetic waves other than radio waves
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
    • G01S7/02—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
    • G01S7/02—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00
    • G01S7/03—Details of HF subsystems specially adapted therefor, e.g. common to transmitter and receiver
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
    • G01S7/02—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00
    • G01S7/35—Details of non-pulse systems

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  • Engineering & Computer Science (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Physics & Mathematics (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • General Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Radar Systems Or Details Thereof (AREA)
  • Circuits Of Receivers In General (AREA)
  • Burglar Alarm Systems (AREA)

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 a potentiometer, an MCU and a microwave chip, wherein the microwave chip is arranged to generate an excitation signal in a power-supplied 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 potentiometer is electrically connected with the MCU, the MCU selects the corresponding excitation signal amplitude grades according to the state of the potentiometer, and the effective amplitude of the excitation signal generated by the microwave chip is set according to the selected excitation signal amplitude grades, so that 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 an adjustable excitation signal amplitude, wherein the microwave detection device with the adjustable excitation signal amplitude comprises a potentiometer, wherein the potentiometer is electrically connected to an input end of the MCU, so as to form a voltage change of the input end of the MCU based on adjustment of the potentiometer, thereby enabling the MCU to select a corresponding excitation signal amplitude stage based on the voltage change of the input end thereof to set the excitation signal amplitude generated by the microwave chip, and thus to realize effective amplitude adjustment of the excitation signal.
An object of the present utility model is to provide a microwave detection device with adjustable excitation signal amplitude, wherein the MCU includes a voltage detection unit, a logic processing unit, and a first communication unit, wherein the potentiometer is disposed at an input end of the voltage detection unit, so as to set a voltage at the input end of the voltage detection unit based on a setting of the potentiometer, the voltage detection unit is configured to generate a corresponding digital signal based on the voltage at the input end of the voltage detection unit, wherein the logic processing unit is electrically connected to the voltage detection unit, and correspondingly selects a corresponding excitation signal amplitude stage based on the digital signal, and processes the selected excitation signal amplitude stage into a stage control signal that can be identified by the microwave chip, and the first communication unit is electrically connected to the logic processing unit, so as to set an effective amplitude of the excitation signal generated by the microwave chip based on the setting of the potentiometer, that is, the actual microwave detection device with adjustable excitation signal amplitude can be adjusted based on a state adjustment of the potentiometer, so that an actual microwave detection device with adjustable excitation signal amplitude can be adjusted easily.
An object of the present utility model is to provide a microwave detection device with adjustable excitation signal amplitude, wherein the voltage detection unit is configured to generate the corresponding digital signal based on the voltage at the input end thereof based on the voltage change of the input end formed by the corresponding adjustment of the potentiometer externally arranged to the MCU, so as to realize the selection of the corresponding excitation signal amplitude stage based on the adjustment of the potentiometer, and facilitate the adjustment of the actual detection space of the microwave detection device with adjustable excitation signal amplitude.
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 state of the potentiometer.
An object of the present utility model is to provide a microwave probe apparatus with adjustable excitation signal amplitude, wherein according to the selection of the state change of the potentiometer corresponding to the excitation signal amplitude classification, a corresponding relation between the adjustment of the actual probe space of the microwave probe apparatus with adjustable excitation signal amplitude is designed to form an adjustment reference table, so that a user can adjust the potentiometer according to a target probe space of the microwave probe apparatus with adjustable excitation signal amplitude against the adjustment reference table, so that the actual probe space of the microwave probe apparatus with adjustable excitation signal amplitude matches the target probe space against the target probe 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 the amplitude adjusting unit is fed 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, 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 when 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, so that the adjustment range of the actual detection space is limited and is bounded by the gradient boundary so as not to be stably adapted to the 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 microwave detection device with an adjustable excitation signal amplitude further comprises a sensitivity adjustment potentiometer, wherein the sensitivity adjustment potentiometer is arranged at an input of the voltage detection unit for setting a voltage at the input of the voltage detection unit based on a setting of the sensitivity adjustment potentiometer, wherein the voltage detection unit generates the corresponding digital signal based on a voltage at the input thereof, the digital signal reflects a selection of the state of the potentiometer for the corresponding excitation signal amplitude gradation and a selection of the corresponding sensitivity gradation, respectively, wherein the logic processing unit is electrically connected to the mixing unit for selectively setting the doppler intermediate frequency signal based on the digital signal gradation, thereby forming the adjustable excitation signal amplitude microwave detection device with an adjustable excitation signal.
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 is based on a combination arrangement of a plurality of potentiometers, and an effective amplitude of the excitation signal and a sensitivity of the microwave detection device with the adjustable excitation signal amplitude are respectively set, so that adjustment of an actual detection space of the microwave detection device with the adjustable excitation signal amplitude is facilitated and simplified.
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;
a potentiometer;
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 voltage detection unit, a logic processing unit and a first communication unit, wherein the potentiometer is arranged at the input end of the voltage detection unit to set the voltage of the input end of the voltage detection unit based on the setting of the potentiometer, the voltage detection unit is arranged to generate corresponding digital signals based on the voltage of the input end, the logic processing unit is electrically connected with the voltage detection unit and correspondingly selects corresponding excitation signal amplitude classification based on the digital signals and processes the selected excitation signal amplitude classification into a classification 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 in communication connection with the second communication unit, the digital logic control unit is configured to control the voltage-controlled oscillation unit and the amplitude adjustment unit according to the hierarchical control signal, wherein the voltage-controlled oscillation unit is controlled by the digital logic control unit to output an excitation signal, and the amplitude adjustment unit is electrically connected to the voltage-controlled oscillation unit and is controlled by the digital logic control unit to adjust the effective amplitude of the excitation signal output by the voltage-controlled oscillation unit 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 meets the state setting of the potentiometer;
A mixing unit, wherein 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 the 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 microwave detection device with adjustable excitation signal amplitude further comprises a sensitivity adjustment potentiometer, wherein the sensitivity adjustment potentiometer is arranged at the input end of the voltage detection unit, so as to set the voltage of the input end of the voltage detection unit based on the arrangement of the sensitivity adjustment potentiometer, wherein the logic processing unit correspondingly selects corresponding excitation signal amplitude grades and selects corresponding sensitivity grades based on the digital signal, 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 frequency mixing unit and the intermediate frequency amplification 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 the Doppler intermediate frequency signal is transmitted from the frequency mixing unit to the intermediate frequency amplification unit based on the selected sensitivity grades, so as to form the setting of the sensitivity of the microwave detection device with adjustable excitation signal amplitude.
In an embodiment of the utility model, the microwave detection device with adjustable excitation signal amplitude further comprises a sensitivity adjustment potentiometer, wherein the sensitivity adjustment potentiometer is arranged at the input end of the voltage detection unit, so as to set the voltage of the input end of the voltage detection unit based on the arrangement of the sensitivity adjustment potentiometer, wherein the logic processing unit correspondingly selects corresponding excitation signal amplitude grades and selects corresponding sensitivity grades based on the digital signal, 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 intermediate frequency amplification 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 Doppler intermediate frequency signal from the intermediate frequency amplification unit to the signal processing unit based on the selected sensitivity grades, so as to form the setting of the sensitivity of the microwave detection device with adjustable excitation signal amplitude.
In an embodiment of the utility model, the microwave detection device with adjustable excitation signal amplitude further comprises a sensitivity adjustment potentiometer, wherein the sensitivity adjustment potentiometer is arranged at the input end of the voltage detection unit to set the voltage of the input end of the voltage detection unit based on the setting of the sensitivity adjustment potentiometer, wherein the logic processing unit correspondingly selects a corresponding excitation signal amplitude grade and selects a corresponding sensitivity grade based on the digital signal, and further processes the selected sensitivity grade into the grading control signal, wherein the microwave detection device with adjustable excitation signal amplitude 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 according to the grading control signal, thereby forming the setting of the sensitivity of the microwave detection device with adjustable excitation signal amplitude.
In an embodiment of the utility model, the microwave detection device with adjustable excitation signal amplitude further includes a sensitivity adjustment potentiometer, wherein the sensitivity adjustment potentiometer is disposed at an input end of the voltage detection unit to set a voltage of the input end of the voltage detection unit based on a setting of the sensitivity adjustment potentiometer, wherein the logic processing unit correspondingly selects a corresponding excitation signal amplitude grade and selects a corresponding sensitivity grade based on the digital signal, and further processes the selected sensitivity grade into the grade control signal, wherein the digital logic control unit is further electrically connected to the intermediate frequency amplification unit and controls an amplification factor of the intermediate frequency amplification unit according to the grade 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 microwave detection device with adjustable excitation signal amplitude further comprises a sensitivity adjustment potentiometer, 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 potentiometer, so that 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 is formed based on the arrangement of the sensitivity adjustment potentiometer, and thereby setting of the sensitivity of the microwave detection device with adjustable excitation signal amplitude is formed.
In an embodiment of the utility model, the microwave detection device with adjustable excitation signal amplitude further comprises a sensitivity adjustment potentiometer, 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 intermediate frequency amplifying unit and the signal processing unit, and the intermediate frequency signal adjustment unit is electrically connected to the sensitivity adjustment potentiometer, so that control of the transmission efficiency of the intermediate frequency signal adjustment unit when the doppler intermediate frequency signal is transmitted from the intermediate frequency amplifying unit to the signal processing unit is formed based on the arrangement of the sensitivity adjustment potentiometer, and setting of the sensitivity of the microwave detection device with adjustable excitation signal amplitude is formed.
In an embodiment of the present utility model, the potentiometer includes a resistor and a movable member, wherein one end of the resistor is electrically coupled to the power source, the other end of the resistor is grounded, wherein one end of the movable member is movably contacted to the resistor, and the other end of the movable member is electrically coupled to the input end of the voltage detection unit, so as to change the contact position between the movable member and the resistor based on the movement of the movable member, thereby forming a voltage change of the input end of the voltage detection unit.
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 an equivalent schematic circuit diagram of an alternative embodiment of a potentiometer of the microwave detection device with adjustable excitation signal amplitude according to the above embodiment of the present utility model.
Fig. 3 is an equivalent schematic circuit diagram of an alternative embodiment of the potentiometer of the microwave detection device with adjustable excitation signal amplitude according to the above embodiment of the present utility model.
Fig. 4 is an equivalent schematic circuit diagram of an alternative embodiment of the potentiometer of the microwave detection device with adjustable excitation signal amplitude according to the above embodiment of the present 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 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 present utility model.
Fig. 6B 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. 7 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. 8A 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. 8B is a schematic diagram of a partial circuit structure of the microwave detection device with adjustable excitation signal amplitude according to fig. 8A.
Fig. 8C 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. 8D is a schematic diagram of a partial circuit structure of the microwave detection device with adjustable excitation signal amplitude according to fig. 8C.
Fig. 9A 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. 9B 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. 9C 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 present utility model.
Fig. 10 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. 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.
Fig. 12 is a schematic view showing a partial appearance of the microwave detection device with adjustable excitation signal amplitude according to the above embodiment of the utility model.
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, the microwave detection device with adjustable excitation signal amplitude comprises a potentiometer 10, an MCU 20, a microwave chip 30, a mixing unit 40 and an antenna unit 50, wherein the microwave chip 30 is configured to generate the excitation signal in a powered state, wherein the MCU 20 is communicatively connected to the microwave chip 30 and is configured 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 achieving effective amplitude adjustment of the excitation signal, in detail, wherein the MCU 20 comprises a voltage detection 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 potentiometer 10 is arranged at the input end of the voltage detection unit 21 to set the voltage of the input end of the voltage detection unit 21 based on the setting of the potentiometer 10, the voltage detection unit 21 is arranged to generate a corresponding digital signal based on the voltage of the input end thereof, i.e. the voltage detection unit 21 is arranged to divide the digital signal of the voltage classification into a corresponding classification control command by the ADC detection unit, wherein the logic processing unit 22 is electrically connected to the voltage detection unit 10 and correspondingly selects a corresponding excitation signal amplitude classification based on the digital signal and processes the selected excitation signal amplitude classification into a classification control signal identifiable by the digital logic control unit 32 of the microwave chip 30, the first communication unit 23 is electrically connected to the logic processing unit 22 and the second communication unit 31 which is communicatively connected to the microwave chip 30, so as to send the hierarchical control signal to the second communication unit 31 of the microwave chip 30, wherein the second communication unit 31 is 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, 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 detected signal output from the amplitude adjustment unit 34 processed by the amplitude adjustment unit 34 can be adjusted according to the current state of the voltage-controlled oscillation unit, and the detected signal can be adjusted according to the current state of the microwave signal, and the current state of the microwave device can be adjusted based on the current state of the microwave device.
Further, wherein the amplitude adjustment unit 34 is fed to the antenna unit 50 for outputting the excitation signal to the mixing unit 40 and feeding the antenna unit 50 with the excitation 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 microwave beam being reflected 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, wherein the mixing unit 40 outputs a doppler intermediate frequency signal corresponding to the frequency/phase difference between the excitation signal and the echo signal, wherein the excitation signal amplitude adjustable microwave detection device further comprises an intermediate frequency amplification unit 60, a signal processing unit 70 and a control unit 80, wherein the intermediate frequency amplification 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 intermediate frequency processing unit and the logic unit 22 is arranged for generating the doppler processing logic signal based on the frequency/phase difference between the excitation signal and the echo signal, wherein the logic processing unit 22 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, referring to fig. 2 to 4 of the drawings of the specification of the present utility model, the equivalent circuit principle structure of the alternative embodiment of the potentiometer 10 is schematically shown, corresponding to fig. 2, wherein the potentiometer 10 comprises a resistor 11 and a movable member 12, wherein one end of the resistor 11 is electrically coupled to a power source, the other end of the resistor 11 is grounded, wherein one end of the movable member 12 is movably contacted to the resistor 11, and the other end of the movable member is electrically coupled to the input end of the voltage detection unit 21, so as to change the contact positions of the movable member 12 and the resistor 11 based on the movement of the movable member 12, thereby forming a voltage change of the input end of the voltage detection unit 21, so as to select the corresponding excitation signal amplitude classification based on the movement of the movable member 12, thereby facilitating the adjustment of the actual detection space of the microwave detection device with adjustable excitation signal amplitude.
Further, corresponding to fig. 3, in the principle structure of the potentiometer 10 illustrated in fig. 2, the potentiometer 10 further includes an equivalent resistor 13, where the equivalent resistor 13 is disposed between a power source and the resistor 11, so as to expand the adjustment range of the voltage of the potentiometer 10 to the input terminal of the voltage detection unit 21 based on the setting of the equivalent resistor 13, it is understood that in some embodiments, the equivalent resistor 13 may be further connected in parallel to the resistor 11, or a plurality of equivalent resistors 13 may be connected in series and parallel to the resistor 11, which is not limited by the present utility model.
In particular, corresponding to fig. 4, the equivalent resistor 13 is integrated in the MCU 20 under the principle structure of the potentiometer 10 illustrated in fig. 3, so as to facilitate improving the circuit integration degree 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. 5 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. 6A and 6B of the drawings of the present specification, wherein the excitation signal amplitude adjustable microwave detection device comprises an intermediate frequency signal adjusting unit 90, wherein the intermediate frequency signal adjusting unit 90 is electrically connected to the MCU20, wherein the excitation signal amplitude adjustable microwave detection device further comprises a sensitivity adjustment potentiometer 10A, wherein the sensitivity adjustment potentiometer 10A is arranged at an input of the voltage detection unit 21 to set the voltage at the input of the voltage detection unit 21 based on the setting of the sensitivity adjustment potentiometer 10A, wherein the logic processing unit 22 of the MCU20 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 intermediate frequency signal in accordance with the gradation selection setting of the MCU20, thereby forming a setting of the sensitivity of the excitation signal amplitude adjustable microwave detection device.
It will be appreciated that the alternative embodiment of the sensitivity adjustment potentiometer 10A corresponds to the equivalent circuit principle structure of the alternative embodiment of the potentiometer 10 shown in fig. 2 to 4, in other words, the utility model realizes the effective amplitude adjustment of the excitation signal and the setting of the sensitivity by arranging at least two potentiometers respectively, so that the effective amplitude of the excitation signal and the sensitivity of the microwave detection device with adjustable excitation signal amplitude are respectively set based on the combined arrangement of a plurality of potentiometers, and the adjustment of the actual detection space of the microwave detection device with adjustable excitation signal amplitude is facilitated and simplified.
Corresponding to fig. 6A, 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 detecting device with adjustable excitation signal amplitude.
Corresponding to fig. 6B, 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. 6A or 6B, 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. 6A, 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. 6B, the intermediate frequency signal adjusting unit 90 may be integrated into the microwave chip 30.
With further reference to fig. 7, 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, referring to fig. 8A and 8B, the intermediate frequency signal adjusting unit 90 is directly controlled by the sensitivity adjusting potentiometer 10A, wherein the intermediate frequency signal adjusting unit 90 is disposed between the mixing unit 40 and the intermediate frequency amplifying unit 60, wherein the intermediate frequency signal adjusting unit 90 is electrically connected to the sensitivity adjusting potentiometer 10A, so as to form a control on the transmission efficiency of the intermediate frequency signal adjusting unit 90 when the doppler intermediate frequency signal is transmitted from the mixing unit 40 to the intermediate frequency amplifying unit 60 based on the setting of the sensitivity adjusting potentiometer 10A, thereby forming a setting on the sensitivity of the microwave detection device with adjustable excitation signal amplitude.
Also, referring to fig. 8C and 8D, 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 adjustment potentiometer 10A, and the intermediate frequency signal adjusting unit 90 is electrically connected to the sensitivity adjustment potentiometer 10A to form control of the conveying efficiency of the intermediate frequency signal adjusting unit 90 when conveying the doppler intermediate frequency signal from the intermediate frequency amplifying unit 60 to the signal processing unit 70 based on the setting of the sensitivity adjustment potentiometer 10A, thereby forming setting of the sensitivity of the excitation signal amplitude-adjustable microwave detection device.
With further reference to fig. 9A to 9C, 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. 9A, 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. 9B, wherein the antenna unit 50 is arranged in a transceiving separated form, wherein the adjustable amplifier 90A is arranged between the receiving feeding 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. 9C, 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.
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.
It will be appreciated that, on the premise of adjusting the effective amplitude of the excitation signal by the potentiometer 10, the sensitivity adjustment of the microwave detection device with adjustable excitation signal amplitude may be implemented in other manners, such as providing a mechanical switching device or a digital switching device, where the mechanical switching device includes a dial switch, a rotary multi-gear switch, a dial switch, a coding switch, etc., and the digital switching device includes a bluetooth, mesh, wiFi, zigbe, loRa, 868 radio frequency module, 915 radio frequency module, 433 radio frequency module, DALI, KNX, PLC of a wired communication module, CAN BUS, RS485, RS232, etc., an NFC module, etc., which is not limited in the present utility model.
Further, referring to fig. 10 to 12, according to the selection of the step of the excitation signal amplitude according to the state change of the potentiometer 10, that is, according to the selection of the step of the excitation signal amplitude according to the contact position change of the movable member 12 and the resistor 11 of the potentiometer 10, an adjustment reference table 100 is designed and formed corresponding to the adjustment of the actual detection space of the microwave detection device with adjustable excitation signal amplitude, so that a user can adjust the potentiometer 10 according to a target detection space of the microwave detection device with adjustable excitation signal amplitude against the adjustment reference table 100, so that the actual detection space of the microwave detection device with adjustable excitation signal amplitude matches the target detection space against the target detection space.
It should be noted that, the state change of the potentiometer 10 is creatively and directly corresponding to the actual detection space of the microwave detection device with adjustable excitation signal amplitude, so that the application scenario adapted to the microwave detection device with adjustable excitation signal amplitude under a certain state setting of the potentiometer 10 can be correspondingly recommended, and a user can directly adjust the potentiometer 10 against the adjustment reference table 100 based on the actual application scenario, thereby enabling the debugging of the microwave detection device with adjustable excitation signal amplitude to be simpler and faster.
It should be understood that the exemplary expression manner shown in the table of the present utility model is the adjustment reference table 100, and is not limited to the data shown in the drawing, which mainly shows the design concept of the adjustment reference table 100, that is, the effective amplitude adjustment of the excitation signal is implemented according to the connection relationship and the structural relationship between the MCU 20 and the microwave chip 30 disclosed in the present utility model, and the state change of the potentiometer 10 is directly corresponding to the actual detection space of the microwave detection device with adjustable excitation signal amplitude according to the extension concept of designing a reference table, and further the application scenario adapted to the microwave detection device with adjustable excitation signal amplitude under a certain state setting of the potentiometer 10 is creatively proposed in the present utility model.
Preferably, in practical application, the adjustment reference table 100 of the excitation signal amplitude adjustable microwave probe device is printed on a corresponding housing of the excitation signal amplitude adjustable microwave probe device, as illustrated in fig. 10, wherein the adjustment reference table 100 is printed adjacently near the potentiometer 10, wherein the adjustment reference table 100 directly corresponds to an applicable area of the excitation signal amplitude adjustable microwave probe device with a state change of the potentiometer 10, thereby facilitating a user to adjust the potentiometer 10 according to an actual target probe space of the excitation signal amplitude adjustable microwave probe device against the adjustment reference table 100, so that the actual probe space of the excitation signal amplitude adjustable microwave probe device matches with the target probe space against the target probe space, and facilitating an adjustment of the actual probe space of the excitation signal amplitude adjustable microwave probe device.
In particular, referring to fig. 11, the microwave detecting device with adjustable amplitude of the excitation signal has a sensitivity setting function, the microwave detecting device with adjustable amplitude of the excitation signal includes the potentiometer 10 and the sensitivity adjustment potentiometer 10A, and a corresponding sensitivity adjustment reference table is printed corresponding to the sensitivity adjustment of the microwave detecting device with adjustable amplitude of the excitation signal.
It should be noted that, referring to fig. 12, the potentiometer 10 is allowed to be externally arranged on the microwave detection device with adjustable amplitude of the excitation signal.
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 (10)

1. The microwave detection device with adjustable excitation signal amplitude is characterized by comprising:
an antenna unit;
a potentiometer;
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 voltage detection unit, a logic processing unit and a first communication unit, wherein the potentiometer is arranged at the input end of the voltage detection unit to set the voltage of the input end of the voltage detection unit based on the setting of the potentiometer, the voltage detection unit is arranged to generate corresponding digital signals based on the voltage of the input end, the logic processing unit is electrically connected with the voltage detection unit and correspondingly selects corresponding excitation signal amplitude classification based on the digital signals and processes the selected excitation signal amplitude classification into a classification 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 in communication connection with the second communication unit, the digital logic control unit is configured to control the voltage-controlled oscillation unit and the amplitude adjustment unit according to the hierarchical control signal, wherein the voltage-controlled oscillation unit is controlled by the digital logic control unit to output an excitation signal with a corresponding frequency, and the amplitude adjustment unit is electrically connected to the voltage-controlled oscillation unit and is controlled by the digital logic control unit to adjust the effective amplitude of the excitation signal output by the voltage-controlled oscillation unit 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 meets the state setting of the potentiometer;
A mixing unit, wherein 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 the 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 corresponding electrical equipment based on the effective characteristics of the Doppler intermediate frequency signal.
2. The excitation signal amplitude adjustable microwave detection device of claim 1, wherein the excitation signal amplitude adjustable microwave detection device further comprises a sensitivity adjustment potentiometer, wherein the sensitivity adjustment potentiometer is disposed at an input of the voltage detection unit to set a voltage at the input of the voltage detection unit based on a setting of the sensitivity adjustment potentiometer, 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 disposed between the mixing unit and the intermediate frequency amplification unit and is electrically connected to the logic processing unit under control of 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 mixing unit to the intermediate frequency amplification unit based on the selected sensitivity stage, thereby forming a sensitivity setting for the excitation signal amplitude adjustable microwave detection device.
3. The excitation signal amplitude adjustable microwave detection device of claim 1, wherein the excitation signal amplitude adjustable microwave detection device further comprises a sensitivity adjustment potentiometer, wherein the sensitivity adjustment potentiometer is disposed at an input of the voltage detection unit to set a voltage at the input of the voltage detection unit based on a setting of the sensitivity adjustment potentiometer, wherein the logic processing unit correspondingly selects a corresponding excitation signal amplitude gradation based on the digital signal and selects a corresponding sensitivity gradation, 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 gradation, thereby forming a sensitivity setting for the excitation signal amplitude adjustable microwave detection device.
4. The excitation signal amplitude adjustable microwave detection device of claim 2, wherein the excitation signal amplitude adjustable microwave detection device further comprises a sensitivity adjustment potentiometer, wherein the sensitivity adjustment potentiometer is disposed at an input of the voltage detection unit to set a voltage at the input of the voltage detection unit based on a setting of the sensitivity adjustment potentiometer, wherein the logic processing unit correspondingly selects a corresponding excitation signal amplitude gradation based on the digital signal and selects a corresponding sensitivity gradation, and further processes the selected sensitivity gradation into the gradation 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 controllably electrically connected to the digital logic control unit, wherein the digital logic control unit controls a magnification of the echo signal by the adjustable amplifier in accordance with the gradation control signal, 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 according to claim 2, wherein the excitation signal amplitude adjustable microwave detection device further comprises a sensitivity adjustment potentiometer, wherein the sensitivity adjustment potentiometer is disposed at an input of the voltage detection unit to set a voltage at the input of the voltage detection unit based on a setting of the sensitivity adjustment potentiometer, wherein the logic processing unit correspondingly selects a corresponding excitation signal amplitude gradation based on the digital signal and selects a corresponding sensitivity gradation, and further processes the selected sensitivity gradation into the gradation control signal, wherein the digital logic control unit is further electrically connected to the intermediate frequency amplification unit and controls an amplification factor of the intermediate frequency amplification unit in accordance with the gradation control signal, thereby forming a setting of a sensitivity of the excitation signal amplitude adjustable microwave detection device.
6. The excitation signal amplitude adjustable microwave detection device of claim 1, wherein the excitation signal amplitude adjustable microwave detection device further comprises a sensitivity adjustment potentiometer, 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 mixing unit and the intermediate frequency amplification unit, wherein the intermediate frequency signal adjustment unit is electrically connected to the sensitivity adjustment potentiometer to form a control of a transfer efficiency of the intermediate frequency signal adjustment unit when transferring the doppler intermediate frequency signal from the mixing unit to the intermediate frequency amplification unit based on a setting of the sensitivity adjustment potentiometer, thereby forming a setting of a sensitivity of the excitation signal amplitude adjustable microwave detection device.
7. The excitation signal amplitude adjustable microwave detection device of claim 1, wherein the excitation signal amplitude adjustable microwave detection device further comprises a sensitivity adjustment potentiometer, 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, the intermediate frequency signal adjustment unit being electrically connected to the sensitivity adjustment potentiometer to form a control of 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 a setting of the sensitivity adjustment potentiometer, thereby forming a setting of a sensitivity of the excitation signal amplitude adjustable microwave detection device.
8. The microwave detection device according to any one of claims 1 to 7, wherein the potentiometer comprises a resistor and a movable member, wherein one end of the resistor is electrically coupled to a power source, the other end of the resistor is grounded, wherein one end of the movable member is movably contacted with the resistor, and the other end of the movable member is electrically coupled to an input end of the voltage detection unit, so as to change a contact position between the movable member and the resistor based on the movement of the movable member, thereby forming a voltage change of the input end of the voltage detection unit.
9. The excitation signal amplitude adjustable microwave detection device of claim 8, wherein the signal processing unit is integrated with the MCU.
10. The excitation signal amplitude adjustable microwave detection device according to claim 8, wherein the mixing unit and/or the intermediate frequency amplifying unit is integrated in the microwave chip.
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