WO2023088451A1 - Dispositif de détection de micro-ondes doppler et son procédé d'ajustement adaptatif de limite de détection - Google Patents

Dispositif de détection de micro-ondes doppler et son procédé d'ajustement adaptatif de limite de détection Download PDF

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WO2023088451A1
WO2023088451A1 PCT/CN2022/133032 CN2022133032W WO2023088451A1 WO 2023088451 A1 WO2023088451 A1 WO 2023088451A1 CN 2022133032 W CN2022133032 W CN 2022133032W WO 2023088451 A1 WO2023088451 A1 WO 2023088451A1
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unit
amplitude
branch
adjustment
intermediate frequency
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PCT/CN2022/133032
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English (en)
Chinese (zh)
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邹高迪
邹明志
邹新
邹亮
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深圳迈睿智能科技有限公司
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Publication of WO2023088451A1 publication Critical patent/WO2023088451A1/fr

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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

Definitions

  • the invention relates to the field of Doppler microwave detection, in particular to a Doppler microwave detection device and a detection boundary adaptive adjustment method thereof.
  • the microwave detection technology based on the principle of Doppler effect, as an important link between people and things, and between things and things, has unique advantages in behavior detection and presence detection technology, which can By transmitting a microwave beam at a fixed frequency, and receiving a reflected echo formed by the microwave beam being reflected by the corresponding object, and subsequently generating a frequency difference corresponding to the microwave beam and the reflected echo by means of frequency mixing detection
  • a Doppler intermediate frequency signal the amplitude fluctuation of the Doppler intermediate frequency signal corresponds to the Doppler effect generated by the motion of the corresponding object, so that the motion of the corresponding object can be characterized based on the Doppler intermediate frequency signal, and in When applied to the detection of human activities, the intelligent interconnection between people and things can be realized by
  • a certain degree of gradient boundary is non-deterministic.
  • the means of shaping the gradient boundary of the corresponding microwave beam is mainly reflected in the lack of adjustment means for the beam angle of the microwave beam.
  • the actual detection space of the corresponding microwave detection module is fixed and difficult to control, corresponding to the situation that the actual detection space does not match the corresponding target detection space, so that the target detection space outside the actual detection space cannot be effectively detected, and / Or there is environmental interference in the actual detection space outside the target detection space, including motion interference, electromagnetic interference, and self-excited interference caused by the electromagnetic shielding environment, resulting in the accuracy of the existing microwave detection technology based on the principle of the Doppler effect.
  • the microwave detection module mainly by selecting the microwave detection module whose actual detection space is larger than the corresponding target detection space, and setting the corresponding threshold value on the amplitude of the Doppler intermediate frequency signal to reduce the
  • the sensitivity of the microwave detection module is based on the reduction of the sensitivity to eliminate the environmental interference and action interference in the actual detection space outside the target detection space.
  • the amplitude of the Doppler intermediate frequency signal is related to the energy of the reflected echo, it is also related to the area of the reflecting surface in the environment, the size and speed of the reflecting surface of the moving object, and the microwave detection
  • the distance between modules therefore, based on the reduction of the sensitivity of the microwave detection module, the environmental interference and action interference of the actual detection space outside the target detection space cannot be accurately excluded, so that the detection of the target detection space is not stable.
  • 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 On the one hand, the reduction in sensitivity will not reduce the power consumption of the microwave detection module, and will cause radiation loss outside the target detection space; on the other hand, it will easily form self-excited interference in the target detection space, especially in the The state of highly reflective objects in the target detection space and the state of a non-open small space in the target detection space, such as the state of a factory building or warehouse with a large number of metal structures in the target detection space.
  • the existing microwave detection modules whose actual detection space is larger than the corresponding target detection space are selected, and the environment of the actual detection space outside the target detection space is excluded by reducing the sensitivity of the microwave detection module.
  • the Doppler intermediate frequency signal generated by interference and action interference on the one hand, cannot accurately exclude the environmental interference and action interference in the actual detection space outside the target detection space, so that the detection of the target detection space is not stable and accurate;
  • the state of the non-open small space on the wall and the ground; and the corresponding reduction of the power consumption of the microwave detection module will not cause radiation loss outside the target detection space.
  • An object of the present invention is to provide a Doppler microwave detection device and its detection boundary adaptive adjustment method, wherein the amplitude of the excitation signal of the Doppler microwave detection device can be adjusted and set to The correlation between the amplitude and the energy density distribution of the microwave beam emitted by the Doppler microwave detection device, adjusting the gradient boundary of the microwave beam and adjusting the gradient boundary of the Doppler microwave detection device
  • the actual detection space corresponds to the adjustment of the detection range of the Doppler microwave detection device.
  • Another object of the present invention is to provide a Doppler microwave detection device and its detection boundary adaptive adjustment method, wherein the amplitude of the excitation signal of the Doppler microwave detection device can be adjusted to adjust the Doppler In the actual detection space bounded by the gradient boundary of the microwave detection device, the attenuation, reflectivity, and penetration of the microwave beam in the same medium layer tend to be constant, based on the
  • the adjustment of the actual detection space is based on the state that the adjustment of the amplitude of the excitation signal in the actual detection space is compatible with the target detection space bounded by walls, glass or metal plate layers, and the microwave beam is reduced
  • the field strength outside the target detection space is correspondingly beneficial to eliminate environmental interference and action interference outside the target detection space based on the adjustment of the amplitude of the excitation signal.
  • Another object of the present invention is to provide a Doppler microwave detection device and its detection boundary adaptive adjustment method, wherein the amplitude of the excitation signal of the Doppler microwave detection device can be adjusted to adjust the Doppler In the actual detection space bounded by the gradient boundary of the microwave detection device, the attenuation, reflectivity, and penetration of the microwave beam in the same medium layer tend to be constant, based on the
  • the adjustment of the actual detection space is based on the state that the adjustment of the amplitude of the excitation signal in the actual detection space is compatible with the target detection space bounded by walls, glass or metal plate layers, and the microwave beam is reduced
  • the field strength outside the target detection space is correspondingly beneficial to reduce the electromagnetic interference of the Doppler microwave detection device on the target detection space based on the adjustment of the amplitude of the excitation signal.
  • Another object of the present invention is to provide a Doppler microwave detection device and its detection boundary adaptive adjustment method, wherein based on the adjustment of the actual detection space, in the actual detection space based on the amplitude of the excitation signal Adjusting the state adapted to the target detection space, the intensity of the echo signal formed by the reflection of the microwave beam by the wall, glass or metal plate layer defining the target detection space can be reduced, so as to facilitate the The adjustment of the amplitude of the excitation signal, the state of highly reflective objects in the target detection space and the state of a non-open small space in the target detection space, reduce the Doppler microwave detection device based on multiple The probability of self-excited interference caused by path reflection.
  • Another object of the present invention is to provide a Doppler microwave detection device and its detection boundary adaptive adjustment method, wherein based on the adjustment of the amplitude of the excitation signal, compared with the independent sensitivity adjustment method, since it can adjust the
  • the actual detection space is beneficial to reduce the radiation loss outside the target detection space, which is also beneficial to reduce the radiation power consumption of the microwave detection device.
  • Another object of the present invention is to provide a Doppler microwave detection device and its detection boundary adaptive adjustment method, wherein based on the adjustment of the amplitude of the excitation signal, compared with the independent sensitivity adjustment method, since it can adjust the
  • the actual detection space has a relatively clear detection boundary, which is conducive to ensuring the stability and accuracy of the Doppler microwave detection device in practical detection applications.
  • Another object of the present invention is to provide a Doppler microwave detection device and its detection boundary adaptive adjustment method, wherein the Doppler microwave detection device includes a feed circuit and an adjustment input unit, wherein the feed circuit
  • the effective amplitude of the output excitation signal can be set in a preset amplitude range based on the selection of corresponding input information of the adjustment input unit.
  • Another object of the present invention is to provide a Doppler microwave detection device and its detection boundary adaptive adjustment method, wherein the selection of the input information of the adjustment input unit will not change the excitation output of the feed circuit The frequency of the signal will not affect the impedance matching between the feed circuit and the corresponding antenna unit, that is, the connection relationship between the adjustment input unit and the feed circuit can maintain the operating frequency of the feed circuit And the independence of impedance, so it is suitable for microwave detection based on the principle of Doppler effect.
  • Another object of the present invention is to provide a Doppler microwave detection device and its detection boundary adaptive adjustment method, wherein the adjustment of the connection relationship between the input unit and the feed circuit can maintain the operation of the feed circuit Independence of frequency and impedance, the selection of the corresponding input information of the adjustment input unit will not change the output efficiency of the feeding circuit to output the excitation signal, so that it can be based on the corresponding input of the adjustment input unit
  • the selection of information adjusts the radiation power consumption of the microwave detection device with the same output efficiency, so that the adjustment of the amplitude of the excitation signal in the actual detection space is adapted to the state of the target detection space, reducing the The overall power consumption of the microwave detection device.
  • Another object of the present invention is to provide a Doppler microwave detection device and its detection boundary self-adaptive adjustment method, wherein relative to the independent sensitivity adjustment method, by adjusting the amplitude of the excitation signal, the gradient
  • the actual detection space bounded by the boundary can be adjusted based on the change of the gradient boundary, then the adaptation relationship between the different levels of the adjustment control circuit and the target detection space under the corresponding scene or size can be based on the actual
  • the adaptability between the size of the detection space and the corresponding target detection space is shown intuitively, so as to facilitate the user to use the target detection space in different scenes or sizes according to the different levels of the adjustment control circuit and the corresponding scenes or
  • the adaptation relationship of the target detection space under the size makes it easy to select the appropriate grading of the adjustment control circuit, thus facilitating the popularization of the Doppler microwave detection device in a state where microwaves are invisible.
  • Another object of the present invention is to provide a Doppler microwave detection device and its detection boundary adaptive adjustment method, wherein the effective amplitude V n of the excitation signal fed to the antenna unit is a variable, based on the microwave beam
  • the effective amplitude V n of the excitation signal is adjusted or set in steps to select the gradient boundary of the actual detection space, wherein due to the energy density distribution of the microwave beam to the amplitude segment V I V II segment The responsivity of the change of the effective amplitude V n of the excitation signal tends to change linearly, and the energy efficiency of the microwave detection device can be guaranteed.
  • Another object of the present invention is to provide a Doppler microwave detection device and its detection boundary adaptive adjustment method, wherein under different effective amplitudes V n of the excitation signal, based on the same detected object and the Doppler Exploration of the correlation curve between the distance d between the microwave detection devices and the amplitude A of the Doppler intermediate frequency signal produced by the Doppler microwave detection devices, according to the sensitivity of the Doppler microwave detection devices to the The threshold value of the amplitude A of the Doppler intermediate frequency signal is limited, and the amplitude segment A n1 A in the correlation curve between the distance d and the amplitude A of the Doppler intermediate frequency signal ⁇ A/ ⁇ d meets a certain numerical requirement n2 section, the sensitivity of the Doppler microwave detection device is further adjusted or set in stages, then the sensitivity adjustment of the Doppler microwave detection device corresponds to the amplitude section A n1 A n2 section
  • Another object of the present invention is to provide a Doppler microwave detection device and its detection boundary adaptive adjustment method, wherein under the corresponding effective amplitude V n of the excitation signal, between the distance d and the Doppler In the correlation curve between the amplitude A of the intermediate frequency signal, ⁇ A/ ⁇ d meets the amplitude segment A n1 A n2 of a certain numerical requirement, and the sensitivity of the Doppler microwave detection device is adjusted or set in stages, so that the The boundary of the effective detection space is set correspondingly in the sensitivity adjustment space defined by the distance segment d n1 d n2 corresponding to the amplitude segment A n1 A n2 segment, corresponding to the excitation signal
  • the effective amplitude V n is related to the state of the actual detection space, and the adjustment of the effective amplitude V n of the excitation signal is combined with the stepless adjustment or step-by-step setting of the sensitivity of the Doppler microwave detection device , while ensuring the certainty of the boundary of the effective
  • Another object of the present invention is to provide a Doppler microwave detection device and its detection boundary adaptive adjustment method, wherein the adjustment combination of the effective amplitude V n of the excitation signal is adjusted to the Doppler microwave detection device.
  • the stepless adjustment or step-by-step setting of sensitivity can ensure the effective detection defined by the sensitivity setting of the Doppler microwave detection device while expanding the adjustable range of the boundary of the effective detection space.
  • the certainty of the boundary of the space avoids the defect that a definite detection boundary cannot be formed because the actual detection space is bounded by the gradient boundary when the amplitude of the excitation signal is adjusted separately.
  • Another object of the present invention is to provide a Doppler microwave detection device and its detection boundary adaptive adjustment method, wherein the adjustment combination of the effective amplitude V n of the excitation signal is adjusted to the Doppler microwave detection device.
  • the stepless adjustment or step-by-step setting of sensitivity can ensure the effective detection defined by the sensitivity setting of the Doppler microwave detection device while expanding the adjustable range of the boundary of the effective detection space.
  • Another object of the present invention is to provide a Doppler microwave detection device and its detection boundary adaptive adjustment method, wherein the Doppler microwave detection device is preset with a preset noise floor value, wherein based on the energy of the microwave beam
  • the density distribution has a relatively high correlation between the detection direction of the Doppler microwave detection device and the amplitude of the excitation signal.
  • the amplitude of the excitation signal V Section IV II adaptively adjusts the effective amplitude V n of the excitation signal from large to small, and reads the noise floor value of the Doppler intermediate frequency signal under the corresponding effective amplitude V n of the excitation signal , so that when the read noise floor value of the Doppler intermediate frequency signal is less than or equal to the preset noise floor value, the amplitude V H of the corresponding excitation signal is the excitation signal adapted to the current environment Therefore, when the effective amplitude V n of the excitation signal is adjusted based on the boundary setting of the target detection space, it is beneficial to ensure the adjustable range of the boundary of the target detection space and reduce the Radiation loss outside the target detection space.
  • Another object of the present invention is to provide a Doppler microwave detection device and its detection boundary adaptive adjustment method, wherein in the state of no one in the target detection area, in the amplitude section V I V II section of the excitation signal with V H is the maximum amplitude limit to adjust the effective amplitude V n of the excitation signal from large to small, and read the noise floor of the Doppler intermediate frequency signal under the corresponding effective amplitude V n of the excitation signal value, and with the background noise value of the read Doppler intermediate frequency signal as the environmental noise floor value, the corresponding information between the environmental noise floor value of the current environment and the effective amplitude V of the corresponding said excitation signal is established , for the purpose of adaptively setting the target detection space based on the position of the moving object (such as a waving hand or a walking human body) as the boundary of the target detection space, there is a moving object in the target detection area state, adjust the effective amplitude V n of the excitation signal from small to large , and read the corresponding ex
  • Another object of the present invention is to provide a Doppler microwave detection device and its detection boundary adaptive adjustment method, wherein the effective amplitude V n of the amplitude segment V L V H segment of the excitation signal and the corresponding amplitude threshold In the corresponding information between, further based on the corresponding effective amplitude V n of the amplitude segment V L V H segment of the excitation signal, whether the amplitude A of the Doppler intermediate frequency signal in the spectrum energy or amplitude falls below Enter the corresponding amplitude segment A n1 A n2 segment to screen the combination of the effective amplitude V n of different excitation signals and the sensitivity of the Doppler microwave detection device, so that the location of the moving object
  • the adaptive setting of the effective detection space for the boundary can guarantee the certainty of the effective detection boundary.
  • the present invention provides a Doppler microwave detection device, and the Doppler microwave detection device includes:
  • a feeding circuit wherein the feeding circuit is set in the form of an integrated circuit and includes a digital logic processing unit, a voltage-controlled oscillation unit and an excitation signal amplitude adjustment unit, wherein the voltage-controlled oscillation unit is simultaneously electrically Connected to the digital logic processing unit and the excitation signal amplitude adjustment unit, so as to be controlled by the digital logic processing unit to output the excitation signal of the corresponding frequency to the excitation signal amplitude adjustment unit, wherein the excitation
  • the signal amplitude adjustment unit is electrically connected to the antenna unit and is electrically connected to the digital logic processing unit under the control of the digital logic processing unit, so as to be controlled by the digital logic processing unit from the The effective amplitude of the excitation signal accessed by the voltage-controlled oscillation unit is adjusted and fed to the antenna unit, wherein the digital logic processing unit is configured to control the excitation signal according to the input information of the adjustment input unit The effective amplitude of the excitation signal output by the amplitude adjustment unit;
  • a frequency mixing unit wherein the antenna unit is electrically connected to the frequency mixing unit, to emit a signal corresponding to the excitation signal in a state of being fed by the excitation signal output by the excitation signal amplitude adjustment unit A microwave beam of a frequency to form an actual detection space, and receive a reflected echo formed by the microwave beam being reflected by a corresponding object in the actual detection space, and transmit an echo signal corresponding to the reflected echo to the actual detection space
  • the frequency mixing unit wherein the frequency mixing unit is further electrically connected to the voltage-controlled oscillation unit to access the excitation signal output from the voltage-controlled oscillation unit and output the signal corresponding to the A Doppler intermediate frequency signal of the frequency/phase difference between the excitation signal and the echo signal.
  • the feed circuit further includes an input identification unit, wherein the input identification unit is electrically connected to the adjustment input unit and the digital logic processing unit to identify the adjustment input unit input information and transmit digital information corresponding to the input information to the digital logic processing unit, and the digital logic processing unit controls the effective amplitude of the excitation signal output by the excitation signal amplitude adjustment unit based on the digital information.
  • the Doppler microwave detection device further includes an intermediate frequency amplifying unit and a signal processing unit, wherein the intermediate frequency amplifying unit is electrically connected to the frequency mixing unit, to automatically The unit receives the Doppler intermediate frequency signal and amplifies the received Doppler intermediate frequency signal, wherein the signal processing unit is electrically connected to the intermediate frequency amplification unit to extract the The effective characteristics of the Doppler intermediate frequency signal, wherein the digital logic processing unit is electrically connected to the signal processing unit to output corresponding control information according to the effective characteristics of the Doppler intermediate frequency signal extracted by the signal processing unit .
  • the intermediate frequency amplifying unit is electrically connected to the frequency mixing unit, to automatically The unit receives the Doppler intermediate frequency signal and amplifies the received Doppler intermediate frequency signal
  • the signal processing unit is electrically connected to the intermediate frequency amplification unit to extract the The effective characteristics of the Doppler intermediate frequency signal
  • the digital logic processing unit is electrically connected to the signal processing unit to output corresponding control information according to the effective characteristics of the Doppler intermediate frequency
  • the Doppler microwave detection device further includes a control unit, wherein the control unit is electrically connected to the digital logic processing unit to access the control information output by the digital logic processing unit , and output corresponding control signals to corresponding electrical equipment or execute corresponding control actions to control the working status of corresponding electrical equipment in the state of accessing corresponding control information.
  • the digital logic processing unit is further configured to adjust the threshold setting in the signal processing unit according to the digital information output by the input identification unit based on the electrical connection relationship with the signal processing unit , to transform and form the sensitivity setting for the Doppler microwave detection device based on the corresponding input information of the adjustment input unit.
  • the Doppler microwave detection device further includes an adjustment control circuit, wherein the adjustment control circuit includes an input identification unit, a logic processing unit and a communication interface unit, wherein the feed circuit It further includes a communication interface module, wherein the adjustment input unit is electrically connected to the input identification unit of the adjustment control circuit, wherein the input identification unit is electrically connected to the logic processing unit to identify the adjusting the input information of the input unit and transmitting digital information corresponding to the input information to the logic processing unit, wherein the logic processing unit is preset with corresponding hierarchical control instructions that can be recognized by the digital logic processing unit and is electrically connected In the communication interface unit, according to the digital information received from the input recognition unit, the corresponding hierarchical control instructions are transferred to the communication interface unit, wherein the communication interface module is electrically connected to the adjustment control circuit The communication interface unit is used to receive the hierarchical control instructions from the communication interface unit, wherein the digital logic processing unit is electrically connected to the communication interface module to receive the corresponding hierarchical control instructions from the communication interface module.
  • the Doppler microwave detection device further includes an intermediate frequency amplifying unit and a signal processing unit, wherein the intermediate frequency amplifying unit is electrically connected to the frequency mixing unit, to automatically The unit receives the Doppler intermediate frequency signal and amplifies the received Doppler intermediate frequency signal, wherein the signal processing unit is electrically connected to the intermediate frequency amplification unit to extract the Effective features of the Doppler intermediate frequency signal, wherein the logic processing unit is electrically connected to the signal processing unit to output corresponding control information according to the effective feature of the Doppler intermediate frequency signal extracted by the signal processing unit.
  • the intermediate frequency amplifying unit is electrically connected to the frequency mixing unit, to automatically The unit receives the Doppler intermediate frequency signal and amplifies the received Doppler intermediate frequency signal
  • the signal processing unit is electrically connected to the intermediate frequency amplification unit to extract the Effective features of the Doppler intermediate frequency signal
  • the logic processing unit is electrically connected to the signal processing unit to output corresponding control information according to the effective feature of the Doppler intermediate frequency signal extracted by the signal
  • the Doppler microwave detection device further includes a control unit, wherein the control unit is electrically connected to the logic processing unit to access the control information output by the logic processing unit, and In the state of accessing the corresponding control information, the corresponding control signal is output to the corresponding electrical equipment or the corresponding control action is executed to control the working state of the corresponding electrical equipment.
  • the logic processing unit of the adjustment control circuit is further configured to adjust the signal processing unit according to the hierarchical control instruction called based on the electrical connection relationship with the signal processing unit
  • the threshold setting in the adjustment input unit is used to transform and form the sensitivity setting for the Doppler microwave detection device based on the corresponding input information of the adjustment input unit.
  • the digital logic processing unit is further electrically connected to the intermediate frequency amplifying unit, so as to control the amplification factor of the intermediate frequency amplifying unit and transform the corresponding input information based on the adjustment input unit to form a pair of the intermediate frequency amplifying unit.
  • the equivalent adjustment of the threshold setting in the signal processing unit forms the sensitivity setting of the Doppler microwave detection device.
  • the intermediate frequency amplifying unit includes an amplifier, an input resistor, a feedback resistor, a DC blocking capacitor, at least one branch input circuit connected in parallel to the input resistor, and at least one branch input circuit connected in parallel to the feedback resistor A branch feedback circuit, wherein one end of the input resistor is electrically connected to the negative input end of the amplifier, and the other end of the input resistor is grounded through the DC blocking capacitor, wherein one end of the feedback resistor is electrically connected to the negative input end of the amplifier.
  • each of the branch input circuits includes a branch input switch tube and is connected in series with the branch input switch tube
  • a branch input resistor wherein each of the branch feedback circuits includes a branch feedback switch and a branch feedback resistor connected in series with the branch feedback switch, wherein the branch input switch and the branch feedback switch are controlled by the branch feedback switch
  • the digital logic processing unit is electrically connected to the digital logic processing unit, wherein the intermediate frequency amplifying unit is electrically connected to the frequency mixing unit at the positive input end of the amplifier and is connected to the output end of the amplifier.
  • the signal processing unit is electrically connected, so as to realize the turn-on and turn-off control of the corresponding branch input switch and/or the branch feedback switch based on the corresponding input information transformation of the adjustment input unit, and the corresponding adjustment
  • the resistance value of the input resistance of the amplifier and/or the resistance value of the feedback resistance form the adjustment control of the amplification factor of the intermediate frequency amplification unit.
  • the intermediate frequency amplifying unit includes an amplifier, an input resistor, a feedback resistor, a DC blocking capacitor, at least one branch input circuit connected in parallel to the input resistor, and at least one branch input circuit connected in parallel to the feedback resistor
  • a branch feedback circuit wherein one end of the input resistor is electrically connected to the negative input end of the amplifier, and the other end of the input resistor is electrically connected to the frequency mixing unit through the DC blocking capacitor, wherein One end of the feedback resistor is electrically connected to the output end of the amplifier, and the other end of the feedback resistor is electrically connected to the negative input end of the amplifier
  • each of the branch input circuits includes a branch input switch tube and a branch input resistor connected in series with the branch input switch
  • each of the branch feedback circuits includes a branch feedback switch and a branch feedback resistor connected in series with the branch feedback switch, wherein the branch input switch and The branch feedback switch tube is electrically connected to the digital logic processing unit under the control of the digital logic processing unit, wherein the intermediate
  • the output terminal of the amplifier is electrically connected to the signal processing unit, so as to realize the turn-on and turn-off of the corresponding branch input switch tube and/or the branch feedback switch tube based on the corresponding input information transformation of the adjustment input unit
  • the control is to adjust the resistance value of the input resistance of the amplifier and/or the resistance value of the feedback resistance to form the adjustment control of the amplification factor of the intermediate frequency amplification unit.
  • the Doppler microwave detection device further includes an intermediate frequency signal output adjustment unit for adjusting signal transmission efficiency, wherein the intermediate frequency signal output adjustment unit is arranged between the frequency mixing unit and the between the intermediate frequency amplifying units and is electrically connected to the logical processing unit under the control of the logical processing unit, corresponding to the frequency mixing unit being electrically connected to the intermediate frequency amplifying unit through the adjustment of the intermediate frequency signal output, so that the delivery efficiency of the Doppler intermediate frequency signal from the frequency mixing unit to the intermediate frequency amplifying unit can be controlled by the logic processing unit, wherein the logic processing unit is set based on the relationship with the intermediate frequency signal output adjustment unit The electrical connection relationship among them, adjust and control the transmission efficiency of the intermediate frequency signal output adjustment unit when transmitting the Doppler intermediate frequency signal from the frequency mixing unit to the intermediate frequency amplifying unit according to the hierarchical control instruction retrieved, based on The corresponding input information conversion of the adjustment input unit forms an equivalent adjustment to the threshold setting in the signal processing unit to form the sensitivity setting of the Doppler microwave detection
  • the Doppler microwave detection device further includes an intermediate frequency signal output adjustment unit for adjusting signal transmission efficiency, wherein the intermediate frequency signal output adjustment unit is arranged between the intermediate frequency amplification unit and the The signal processing units are electrically connected to the logic processing unit under the control of the logic processing unit, corresponding to the intermediate frequency amplifying unit being electrically connected to the signal processing unit through the adjustment of the intermediate frequency signal output, so that the transmission efficiency of the Doppler intermediate frequency signal from the intermediate frequency amplifying unit to the signal processing unit can be controlled by the logic processing unit, wherein the logic processing unit is set based on the relationship with the intermediate frequency signal output adjustment unit According to the obtained hierarchical control instruction, adjust and control the transmission efficiency of the intermediate frequency signal output adjustment unit to transmit the Doppler intermediate frequency signal from the intermediate frequency amplification unit to the signal processing unit, based on the The corresponding input information conversion of the adjustment input unit forms an equivalent adjustment to the threshold setting in the signal processing unit to form the sensitivity setting of the Doppler microwave detection device.
  • the intermediate frequency signal output adjustment unit has two transmission terminals and includes at least two branch current limiting circuits, wherein each branch current limiting circuit includes a branch MOS transistor and a branch resistor/inductor, wherein the same
  • the drains of the branch MOS transistors of the branch current limiting circuits are electrically connected to one end of the branch resistors/inductors, and the other ends of the branch resistors/inductors of each branch current limiting circuit are electrically connected to
  • the sources of the branch MOS transistors of each of the branch current limiting circuits are grounded, and the gates of the branch MOS transistors of each of the branch current limiting circuits are grounded.
  • the ground impedance between the two transmission ends of the output adjustment unit adjusts the transmission efficiency of the Doppler intermediate frequency signal by the intermediate frequency signal output adjustment unit correspondingly.
  • the Doppler microwave detection device further includes a radio frequency low noise adjustable amplifier, wherein the radio frequency low noise adjustable amplifier is arranged between the antenna unit and the frequency mixing unit, and is electrically connected to the digital logic processing unit under the control of the digital logic processing unit, wherein the digital logic processing unit is configured to control the radio frequency low noise adjustable amplifier according to the hierarchical control instruction received magnification, to adjust the intensity of the echo signal transmitted from the antenna unit to the frequency mixing unit, correspondingly based on the corresponding input information transformation of the adjustment input unit to form the threshold value setting in the signal processing unit Equivalent adjustment forms the sensitivity setting of the Doppler microwave detection device.
  • the excitation signal amplitude adjustment unit includes at least two branch adjustment circuits, wherein each of the branch adjustment circuits includes a first MOS transistor and a second MOS transistor, and the same branch adjustment circuit
  • the source of the first MOS transistor is electrically connected to the drain of the second MOS transistor, wherein the gates of the second MOS transistors of each of the branch regulation circuits are electrically connected to the voltage-controlled An oscillation unit, the sources of the second MOS transistors of each of the branch regulating circuits are grounded, wherein the drains of the first MOS transistors of each of the branch regulating circuits are respectively electrically connected to the antenna unit and connected to the positive pole of the power supply via a resistor/inductor, and the gates of the first MOS transistors of each of the branch regulation circuits are respectively electrically connected to the digital logic processing unit, so that based on the corresponding input information of the regulation input unit
  • the conversion realizes the on-off control of the first MOS transistor of the corresponding branch adjustment circuit, and realizes the effective amplitude adjustment
  • the excitation signal amplitude adjustment unit includes at least two branch adjustment circuits, wherein each of the branch adjustment circuits includes a first MOS transistor and a second MOS transistor, and the same branch adjustment circuit
  • the source of the first MOS transistor is electrically connected to the drain of the second MOS transistor, wherein the gates of the second MOS transistors of each of the branch regulation circuits are electrically connected to the voltage control An oscillation unit, the sources of the second MOS transistors of each of the branch regulating circuits are grounded, wherein the drains of the first MOS transistors of each of the branch regulating circuits are respectively electrically connected to the antenna unit and respectively connected to the positive pole of the power supply via a resistor/inductance, and the gates of the first MOS transistors of each of the branch regulating circuits are respectively electrically connected to the digital logic processing unit, wherein the gates of each of the branch regulating circuits
  • the second MOS transistor is equivalently arranged with at least two MOS transistors connected in parallel, so as to switch on and off the first MO
  • the excitation signal amplitude adjustment unit includes at least two branch adjustment circuits, wherein each of the branch adjustment circuits includes a first MOS transistor and a second MOS transistor, and the same branch adjustment circuit
  • the source of the first MOS transistor is electrically connected to the drain of the second MOS transistor, wherein the gates of the second MOS transistors of each of the branch regulation circuits are electrically connected to the voltage control An oscillation unit, the sources of the second MOS transistors of each of the branch regulation circuits are grounded, wherein the drains of the first MOS transistors of each of the branch regulation circuits are respectively connected to the positive pole of the power supply through a first inductor, wherein each of the first inductances is coupled to a second inductance, wherein the second inductance is connected in parallel to one of the two third inductances coupled to each other, wherein the two third inductances are connected in parallel to the second inductance
  • the third inductance is grounded, one end of the other third inductance is electrically connected to the antenna
  • the excitation signal amplitude adjustment unit includes at least two branch adjustment circuits, wherein each branch adjustment circuit includes a branch MOS transistor and a branch inductance/resistance, wherein all the branch adjustment circuits of the same One end of the branch inductance/resistor is electrically connected to the drain of the branch MOS transistor, wherein the other end of the branch inductance/resistance of each of the branch regulation circuits is electrically connected to the voltage-controlled oscillation unit and
  • the antenna unit is connected to the positive pole of the power supply through a resistance/inductance, the source of the branch MOS transistors of each of the branch regulation circuits is grounded, and the gates of the branch MOS transistors of each of the branch regulation circuits are respectively It is electrically connected to the digital logic processing unit, so as to realize the on-off control of the branch MOS transistors of the corresponding branch regulation circuits based on the corresponding input information conversion of the regulation input unit, so as to realize the control of the The effective amplitude adjustment of the excitation signal
  • the excitation signal amplitude adjustment unit includes at least two branch adjustment circuits, wherein each of the branch adjustment circuits includes a branch resistance/inductance, a first MOS transistor and a second MOS transistor, wherein the same
  • the source of the first MOS transistor of the branch regulating circuit is electrically connected to the drain of the second MOS transistor, and the drain of the first MOS transistor of the same branch regulating circuit passes through the branch resistance
  • the /inductance is connected to the positive pole of the power supply, wherein the gates of the second MOS transistors of each of the branch regulating circuits are electrically connected to the voltage-controlled oscillation unit, and the gates of the second MOS transistors of each of the branch regulating circuits
  • the source is electrically connected to the antenna unit and grounded through a resistor/inductor, and the gates of the first MOS transistors of each branch regulating circuit are respectively electrically connected to the digital logic processing unit, so as to Based on the corresponding input information conversion of the adjustment input unit, the on and off control of the first MO
  • the adjustment input unit is one selected from a combination of mechanical switch input devices consisting of a dial switch, a code switch, a multi-position switch and a toggle switch.
  • the adjustment input unit is configured as an adjustable potentiometer.
  • the adjustment input unit is configured as a digital signal access device.
  • the present invention also provides a detection boundary adaptive adjustment method of a Doppler microwave detection device, and the detection boundary adaptive adjustment method of the Doppler microwave detection device includes the following steps:
  • the noise floor value A k of a Doppler intermediate frequency signal in the frequency spectrum, energy spectrum, power spectrum or amplitude under the corresponding effective amplitude V n of the excitation signal and compare the read values
  • the noise floor value A k of the Doppler intermediate frequency signal and a preset noise floor value A 0 the read noise floor value A k of the Doppler intermediate frequency signal is less than or equal to the preset noise floor value A
  • the amplitude V H of the corresponding excitation signal as the maximum amplitude of the excitation signal adapted to the current environment
  • the amplitude of the excitation signal based on the setting of a preset amplitude segment A n1 A n2 segment corresponding to the effective amplitude V n of the excitation signal, the amplitude of the excitation signal
  • the value segment V L V H sets the effective amplitude V n of the excitation signal, and corresponds to the effective amplitude V n and belongs to the preset amplitude segment A n1 A corresponding to the effective amplitude V n
  • the amplitude threshold in section n2 is the threshold of the amplitude A of the Doppler intermediate frequency signal to set the sensitivity of the Doppler microwave detection device.
  • the detection boundary adaptive adjustment method of the Doppler microwave detection device further includes the steps of:
  • step S6 further comprising the steps of:
  • the amplitude A of the Doppler intermediate frequency signal in the frequency spectrum, energy spectrum, power spectrum or amplitude under the corresponding effective amplitude V n of the excitation signal, and compare the read The amplitude A of the Doppler intermediate frequency signal and the amplitude threshold corresponding to the effective amplitude Vn , based on the comparison result, the amplitude A of the Doppler intermediate frequency signal is greater than the amplitude corresponding to the effective amplitude Vn Threshold switching to the amplitude A of the Doppler intermediate frequency signal is smaller than the amplitude threshold corresponding to the effective amplitude V n , reducing the effective amplitude V n of the excitation signal, and with the reduced
  • the amplitude threshold corresponding to the effective amplitude V n is the threshold value of the Doppler intermediate frequency signal on the amplitude A to set the sensitivity of the Doppler microwave detection device to reduce the Doppler microwave detection The power consumption of the device in the armed state after the human body is removed.
  • step S6 further comprising the steps of:
  • amplitude A of the Doppler intermediate frequency signal in the frequency spectrum, energy spectrum, power spectrum or amplitude under the corresponding effective amplitude V n of the excitation signal, and compare the read
  • the amplitude A of the Doppler intermediate frequency signal and the amplitude threshold corresponding to the effective amplitude V n are switched from the amplitude A of the Doppler intermediate frequency signal smaller than the amplitude threshold corresponding to the effective amplitude V n based on the comparison result until the amplitude A of the Doppler intermediate frequency signal is greater than the amplitude threshold corresponding to the effective amplitude V n , increase the effective amplitude V n of the excitation signal, and with the increased effective amplitude V
  • the amplitude threshold corresponding to n is the threshold value of the amplitude A of the Doppler intermediate frequency signal to set the sensitivity of the Doppler microwave detection device to ensure that the Doppler microwave detection device is in the presence of human activities. detection accuracy in the environment.
  • FIG. 1A is a schematic structural block diagram of a Doppler microwave detection device according to an embodiment of the present invention when using an antenna unit combining transmitting and receiving.
  • Fig. 1B is a schematic structural block diagram of the Doppler microwave detection device according to the above-mentioned embodiment of the present invention when the antenna unit for transmitting and receiving is used.
  • FIG. 2A is a schematic structural block diagram of the Doppler microwave detection device for adjusting the amplitude of the excitation signal according to the above-mentioned embodiment of the present invention.
  • FIG. 2B is a schematic block diagram of another structural block diagram of the Doppler microwave detection device for adjusting the amplitude of the excitation signal according to the above-mentioned embodiment of the present invention.
  • Fig. 3 is a schematic structural block diagram of the Doppler microwave detection device according to another embodiment of the present invention.
  • FIG. 4A is a schematic structural block diagram of the Doppler microwave detection device implementing sensitivity adjustment according to the above-mentioned embodiment of the present invention.
  • FIG. 4B is a schematic diagram of another structural block diagram of the Doppler microwave detection device for implementing sensitivity adjustment according to the above-mentioned embodiment of the present invention.
  • FIG. 4C is a schematic diagram of another structural block diagram of the Doppler microwave detection device to realize sensitivity adjustment according to the above-mentioned embodiment of the present invention.
  • FIG. 4D is a schematic diagram of another structural block diagram of the Doppler microwave detection device for implementing sensitivity adjustment according to the above-mentioned embodiment of the present invention.
  • FIG. 4E is a schematic diagram of another structural block diagram of the Doppler microwave detection device for implementing sensitivity adjustment according to the above-mentioned embodiment of the present invention.
  • FIG. 4F is a schematic diagram of another structural block diagram of the Doppler microwave detection device for implementing sensitivity adjustment according to the above-mentioned embodiment of the present invention.
  • FIG. 5A is a schematic diagram of a circuit structure of the Doppler microwave detection device for adjusting the amplitude of the excitation signal according to the above-mentioned embodiment of the present invention.
  • FIG. 5B is a schematic diagram of a modified structure of the circuit structure for adjusting the amplitude of the excitation signal of the Doppler microwave detection device according to the above-mentioned embodiment of the present invention.
  • FIG. 5C is a schematic diagram of another modified structure of the circuit structure of the Doppler microwave detection device for adjusting the amplitude of the excitation signal according to the above-mentioned embodiment of the present invention.
  • FIG. 5D is a schematic diagram of another circuit structure of the Doppler microwave detection device for adjusting the amplitude of the excitation signal according to the above-mentioned embodiment of the present invention.
  • FIG. 5E is a schematic diagram of another circuit structure for adjusting the amplitude of the excitation signal by the Doppler microwave detection device according to the above-mentioned embodiment of the present invention.
  • Fig. 6 is a schematic diagram of a circuit structure for realizing sensitivity adjustment of the Doppler microwave detection device according to the above-mentioned embodiment of the present invention.
  • FIG. 7A is a schematic diagram of another circuit structure for implementing sensitivity adjustment of the Doppler microwave detection device according to the above-mentioned embodiment of the present invention.
  • FIG. 7B is a schematic diagram of another circuit structure for implementing sensitivity adjustment of the Doppler microwave detection device according to the above-mentioned embodiment of the present invention.
  • FIG. 8 is a schematic diagram of the response curve of the energy density distribution of the microwave beam emitted by the Doppler microwave detection device to the change of the effective amplitude V n of the excitation signal according to the above embodiment of the present invention.
  • FIG. 9 is a schematic diagram of the variation of the actual detection space of the Doppler microwave detection device with the effective amplitude Vn of the excitation signal according to the above embodiment of the present invention.
  • FIG. 10 is a schematic diagram of the actual detection area and the effective detection area in the vertical detection application scene of the Doppler microwave detection device according to the above-mentioned embodiment of the present invention.
  • the term "a” in the claims and the specification should be understood as “one or more”, that is, in one embodiment, the number of an element may be one, while in another embodiment, the number of the element Can be multiple. Unless it is clearly indicated in the disclosure of the present invention that there is only one element, the term “a” cannot be understood as unique or single, and the term “a” cannot be understood as a limitation on the number.
  • the Doppler microwave detection device includes an adjustment input Unit 10, a feeding circuit 30, a frequency mixing unit 40 and an antenna unit 100, wherein the feeding circuit 30 is set in the form of an integrated circuit and includes a digital logic processing unit 32, a voltage-controlled oscillation unit 33 and a An excitation signal amplitude adjustment unit 34, wherein the voltage-controlled oscillation unit 33 is electrically connected to the digital logic processing unit 32 and the excitation signal amplitude adjustment unit 34 at the same time, so as to be controlled by the digital logic processing unit 32 output the excitation signal of the corresponding frequency to the excitation signal amplitude adjustment unit 34, wherein the excitation signal amplitude adjustment unit 34 is electrically connected to the antenna unit 100 and controlled by the digital logic processing unit 32
  • the ground is electrically connected to the digital logic processing unit 32, so as to be controlled by the digital logic
  • An echo signal of the reflected echo is sent to the frequency mixing unit 40, wherein the frequency mixing unit 40 is further electrically connected to the voltage-controlled oscillation unit 33 to access the output from the voltage-controlled oscillation unit 33
  • the excitation signal is mixed and detected to output a Doppler intermediate frequency signal corresponding to the frequency/phase difference between the excitation signal and the echo signal.
  • the antenna unit 100 is exemplified in the form of transmitting and receiving, corresponding to the state that the antenna unit 100 is connected to the excitation signal amplitude adjustment unit 34 while being electrically connected to the
  • the frequency mixing unit 40 is in a state of being fed by the excitation signal amplitude adjustment unit 34 as a transmitting antenna to transmit the microwave beam, and at the same time as a receiving antenna receiving the microwave beam and being fed by the corresponding microwave beam in the actual detection space.
  • the reflected echo formed by the reflection of the object transmits the echo signal corresponding to the reflected echo to the frequency mixing unit 40 .
  • FIG. 1A the antenna unit 100 is exemplified in the form of transmitting and receiving, corresponding to the state that the antenna unit 100 is connected to the excitation signal amplitude adjustment unit 34 while being electrically connected to the
  • the frequency mixing unit 40 is in a state of being fed by the excitation signal amplitude adjustment unit 34 as a transmitting antenna to transmit the microwave beam, and at the same time as a receiving antenna receiving the
  • the antenna unit 100 is set in a form of separate transmission and reception, corresponding to the antenna unit 100 is also electrically connected to the frequency mixing unit 40 while being fed and connected to the feeding circuit 30 .
  • the antenna unit 100 which has a single feed point and is connected to the feed circuit 30 and electrically connected to the mixing unit 40 at the feed point.
  • the antenna unit 100 in the state that the antenna unit 100 is set in a separate form for transmitting and receiving, the antenna unit 100 has a transmitting feed point that is fed and connected to the feeding circuit 30 and is electrically connected to the mixing unit A receiving feed point 40, so as to be fed by the feeding circuit 30 at the transmitting feeding point, and transmit the echo signal corresponding to the reflected echo to the receiving feeding point at the receiving feeding point
  • the frequency mixing unit 40 is described above.
  • the antenna unit 100 can correspond to the antenna in the integrated form of transmitting and receiving in FIG. 1A , and can also correspond to the antenna in the form of separating transmitting and receiving in FIG. 1B. This is not limiting.
  • the digital logic processing unit 32 is realized by taking the example of the Doppler microwave detection device of the antenna unit 100 in the form of transmitting and receiving. Different structural block diagrams for controlling the effective amplitude of the excitation signal output by the excitation signal amplitude adjustment unit 34 according to the input information of the adjustment input unit 10 are shown respectively.
  • the feed circuit 30 further includes an input identification unit 21, wherein the input identification unit 21 is electrically connected to the adjustment input unit 10 and the digital logic processing unit 32 to identify the Adjust the input information of the input unit 10 and transmit the digital information corresponding to the input information to the digital logic processing unit 32, and the digital logic processing unit 32 controls the output of the excitation signal amplitude adjustment unit 34 based on the digital information.
  • the effective amplitude of the excitation signal corresponds to controlling the effective amplitude V n of the excitation signal output by the excitation signal amplitude adjustment unit 34 according to the input information of the adjustment input unit 10 .
  • the Doppler microwave detection device further includes an adjustment control circuit 20, wherein the adjustment control circuit 20 includes an input identification unit 21, a logic processing unit 22 and a communication interface unit 23, wherein the The feed circuit 30 further includes a communication interface module 31, wherein the adjustment input unit 10 is electrically connected to the input identification unit 21 of the adjustment control circuit 20, wherein the input identification unit 21 is electrically connected to
  • the logic processing unit 22 is used to identify the input information of the adjustment input unit 10 and transmit the digital information corresponding to the input information to the logic processing unit 22, wherein the logic processing unit 22 is preset to be able to be controlled by the digital logic
  • the corresponding hierarchical control instructions identified by the processing unit 32 are electrically connected to the communication interface unit 23, so as to transfer the corresponding hierarchical control instructions to the communication interface unit 23 according to the digital information received from the input identification unit 21.
  • the communication interface module 31 is electrically connected to the communication interface unit 23 of the adjustment control circuit 20 to receive corresponding hierarchical control instructions from the communication interface unit 23, wherein the digital logic processing unit 32 It is electrically connected to the communication interface module 31, so as to receive the corresponding hierarchical control instruction from the communication interface module 31 and control the excitation signal amplitude adjustment unit 34 to the The effective amplitude V n of the excitation signal is adjusted.
  • the switching of the corresponding input information of the adjustment input unit 10 realizes the high-frequency integrated circuit form.
  • the grading selection of the effective amplitude of the excitation signal output by the feed circuit 30 will neither change the frequency of the excitation signal output by the feed circuit 30 nor affect the connection between the feed circuit 30 and the
  • the impedance matching between the antenna units 100 that is, the above connection relationship between the adjustment input unit 10, the adjustment control circuit 20 and the feed circuit 30 can maintain the working frequency and impedance of the feed circuit 30.
  • it is suitable for microwave detection based on the principle of Doppler effect.
  • the above-mentioned structural form of the Doppler microwave detection device corresponding to FIG. 2A or FIG. 2B can maintain the independence of the operating frequency and impedance of the feeding circuit 30, and the corresponding adjustment input unit 10
  • the selection of input information will not change the output efficiency of the excitation signal output by the feeding circuit 30, so that the microwave detection device can be adjusted with the same output efficiency based on the selection of the corresponding input information of the adjustment input unit 10 Radiation power consumption, so that in the actual detection space, the adjustment of the amplitude of the excitation signal is adapted to the state of the target detection space, reducing the overall power consumption of the microwave detection device.
  • the adjustment input unit 10 can be configured as a mechanical switch input device, a digital signal input device, or an analog switch input device, as a human-computer interaction of the Doppler microwave detection device. window, by switching the input information of the adjustment input unit 10 to adjust the effective amplitude of the excitation signal output by the feed circuit 30 in the form of a high-frequency device, wherein the specific form of the adjustment input unit 10 It does not constitute a limitation to the present invention.
  • the mechanical switch input device includes a dial switch, a code switch (such as a BCD code switch), a multi-level switch, a toggle switch, etc.
  • a digital signal access device includes a wireless RF module, such as Infrared remote control module, 433MHz, 868MHz, 2.4GHz wifi, Bluetooth, zigbee, NFC, carrier communication, etc., also includes wired digital modules, such as DALI, KNX, CAN BUS, RS485, RS232 modules, etc., analog switch input device Includes adjustable potentiometer.
  • the Doppler microwave detection device also includes a Intermediate frequency amplifying unit 50 and a signal processing unit 60, wherein said intermediate frequency amplifying unit 50 is electrically connected to said mixing unit 40, to receive said Doppler intermediate frequency signal from said mixing unit 40 and to receive The Doppler intermediate frequency signal is amplified and processed, wherein the signal processing unit 60 is electrically connected to the intermediate frequency amplifying unit 50, so as to extract effective features of the Doppler intermediate frequency signal based on corresponding threshold settings, such as based on The corresponding threshold setting of the Doppler intermediate frequency signal on frequency, frequency change rate, phase, phase change rate, amplitude or amplitude change rate and/or the frequency spectrum, energy spectrum or power spectrum of the Doppler intermediate frequency signal The corresponding threshold value setting on the amplitude of extracting the effective features of the Doppler intermediate frequency signal, wherein the signal processing unit 60 is electrically connected to the
  • the structure of the Doppler microwave detection device is basically electrically connected to the digital logic processing unit 32, corresponding to the logic processing unit 22 or the digital logic processing unit 32 according to the signal processing based on corresponding logic rules
  • the effective features of the Doppler intermediate frequency signal extracted by the unit 60 output corresponding control information.
  • the Doppler microwave detection device further includes a control unit 70, wherein the control unit 70 is electrically connected to the logic processing unit 22 corresponding to FIG.
  • the structure of the Doppler microwave detection device illustrated in FIG. 2A is basically electrically connected to the digital logic processing unit 32 to access the control output of the logic processing unit 22 or the digital logic processing unit 32.
  • the control unit 70 is set to output the control of the corresponding electrical equipment output the corresponding control signal to control the electrical equipment, and when the control unit 70 is set as an electronic switch or a controllable voltage/current conversion device, it performs a switch operation or a voltage/current conversion operation to control the corresponding electrical equipment
  • the representation of the corresponding action of the human (object) body is realized to realize the intelligent response of the corresponding electrical equipment to the corresponding action.
  • the stepless adjustment or step-by-step setting of the sensitivity of the Doppler microwave detection device corresponds to the realization of the Doppler microwave detection device on the basis of the structure of the Doppler microwave detection device shown in Figure 3.
  • the control of the Doppler microwave detection device is realized.
  • the block diagram of the stepless adjustment of the sensitivity or the setting of the steps is shown respectively.
  • the logic processing unit 22 of the adjustment control circuit 20 is further configured based on the electrical connection relationship with the signal processing unit 60 according to the hierarchical control instruction retrieved. Correspondingly adjust the threshold setting in the signal processing unit 60, so as to realize the adjustment of the threshold setting in the signal processing unit 60 based on the switching of the corresponding input information of the adjustment input unit 10 to form the Doppler Stepless adjustment or step-by-step setting of the sensitivity of the microwave detection device.
  • the digital logic processing unit 32 of the feeding circuit 30 is further electrically connected to the intermediate frequency amplifying unit 50 to receive the corresponding classification from the communication interface module 31.
  • the control instruction and the intensity of the Doppler intermediate frequency signal output by the intermediate frequency amplification unit 50 to the signal processing unit 60 by controlling the amplification factor of the intermediate frequency amplification unit 50 according to the received hierarchical control instruction correspond to
  • the signal processing unit 60 extracts the effective features of the Doppler intermediate frequency signal based on the corresponding threshold setting
  • an equivalent adjustment to the threshold setting in the signal processing unit 60 is formed with the corresponding adjustment input unit 10
  • the switching of the input information realizes the stepless adjustment or step-by-step setting of the sensitivity of the Doppler microwave detection device.
  • the Doppler microwave detection device further includes an intermediate frequency signal output adjustment unit 80 for adjusting signal transmission efficiency, wherein the intermediate frequency signal output adjustment unit 80 is arranged in the mixer Between the frequency unit 40 and the intermediate frequency amplifying unit 50, and controlled by the logic processing unit 22 of the adjustment control circuit 20, it is electrically connected to the logic processing unit 22, corresponding to the frequency mixing unit 40 via The intermediate frequency signal output adjustment 80 is electrically connected to the intermediate frequency amplifying unit 50, so that the transmission efficiency of the Doppler intermediate frequency signal delivered from the mixing unit 40 to the intermediate frequency amplifying unit 50 can be processed by the logic The control unit 22, wherein the logic processing unit 22 is set based on the electrical connection relationship with the intermediate frequency signal output adjustment unit 80, adjusts and controls the intermediate frequency signal output adjustment unit 80 according to the hierarchical control instruction called The transmission efficiency when the Doppler intermediate frequency signal is delivered from the frequency mixing unit 40 to the intermediate frequency amplifying unit 50 corresponds to when the signal processing unit 60 extracts the effective features of the Doppler intermediate
  • the intermediate frequency signal output adjustment unit 80 can also be arranged between the intermediate frequency amplification unit 50 and the signal processing unit 60, and is subject to the adjustment
  • the logic processing unit 22 of the control circuit 20 is electrically connected to the logic processing unit 22 in a controlled manner, and the corresponding intermediate frequency amplifying unit 50 is electrically connected to the signal processing unit 60 through the intermediate frequency signal output adjustment 80 , so that the transmission efficiency of the Doppler intermediate frequency signal transmitted from the intermediate frequency amplifying unit 50 to the signal processing unit 60 can be controlled by the logic processing unit 22 .
  • the understanding of the transmission efficiency of the intermediate frequency signal output adjustment unit 80 from the mixing unit 40 to the intermediate frequency amplification unit 50 should include that the mixing unit 40 outputs the The output efficiency of the Doppler intermediate frequency signal and the transmission efficiency of the Doppler intermediate frequency signal being transmitted to the intermediate frequency amplifying unit 50 correspond to the intermediate frequency signal output adjustment unit 80 being arranged between the intermediate frequency amplifying unit 50 and the intermediate frequency amplifying unit 50.
  • the state between the signal processing unit 60, the understanding of the transmission efficiency of the Doppler intermediate frequency signal from the intermediate frequency amplifying unit 50 to the signal processing unit 60 should include that the intermediate frequency amplifying unit 50 outputs the Doppler The output efficiency of the IF signal and the transmission efficiency of the Doppler IF signal to the signal processing unit 60 .
  • any two or more sensitivity adjustment structures can be combined with each other to form a new sensitivity adjustment structure, the present invention There is no limit to this.
  • the combination form of the sensitivity adjustment structure shown in FIG. 4B and FIG. 4C is schematically shown, wherein the digital logic processing unit 32 of the feeding circuit 30 is further electrically connected to the The intermediate frequency amplifying unit 50 adjusts and controls the magnification of the intermediate frequency amplifying unit 50 by receiving the corresponding hierarchical control instruction from the communication interface module 31 and controlling the amplification factor of the intermediate frequency amplifying unit 50 according to the received hierarchical control instruction.
  • the transmission efficiency of the Doppler intermediate frequency signal to the intermediate frequency amplifying unit 50 corresponds to when the signal processing unit 60 extracts the effective features of the Doppler intermediate frequency signal based on the corresponding threshold setting, it can also form a signal processing
  • the equivalent adjustment of the threshold setting in the unit 60 realizes the stepless adjustment or step-by-step setting of the sensitivity of the Doppler microwave detection device by switching the corresponding input information of the adjustment input unit 10 .
  • the Doppler microwave detection device further includes a radio frequency low noise adjustable amplifier 90 corresponding to Fig. 4E and Fig. 4F, wherein the radio frequency low noise adjustable amplifier 90 is arranged between the antenna unit 100 and the Between the frequency mixing unit 40 and controlled by the digital logic processing unit 32, it is electrically connected to the digital logic processing unit 32, wherein the digital logic processing unit 32 is set according to the received hierarchical control instruction Control the magnification of the radio frequency low noise adjustable amplifier 90 to adjust the intensity of the echo signal transmitted from the antenna unit 100 to the mixing unit 40, corresponding to the corresponding input based on the adjustment input unit 10
  • the information conversion forms an equivalent adjustment of the threshold setting in the signal processing unit 60 to form the sensitivity setting of the Doppler microwave detection device.
  • At least one of the frequency mixing unit 40, the intermediate frequency amplifying unit 50, and the signal processing unit 60 is set in the form of an integrated circuit and connected to the feed circuit 30 is integrated into a microwave chip, and the antenna unit 100 is optionally integrated and packaged in the microwave chip.
  • the multiple levels preset in the adjustment control circuit 20 corresponding to the corresponding circuit parameters of the adjustment control circuit 20 can be a limited number of levels, or tend to be continuous grading, to select the corresponding grading of the adjustment control circuit 20 based on the adjustment of the corresponding input information of the adjustment input unit 10, and set the grading or stepless setting of the preset amplitude segment V I V II segment The effective amplitude V n of the excitation signal output by the feeding circuit 30 .
  • the excitation signal amplitude adjustment unit 34 includes at least two branch adjustment circuits 341, wherein each of the branch adjustment circuits 341 includes a first MOS transistor 3411 and a second MOS transistor 3412, wherein the same
  • the source of the first MOS transistor 3411 of the branch regulation circuit 341 is electrically connected to the drain of the second MOS transistor 3412, wherein the gate of the second MOS transistor 3412 of each branch regulation circuit 341 is electrically connected to the voltage-controlled oscillation unit 33, and the source of the second MOS transistor 3412 of each of the branch regulation circuits 341 is grounded, wherein the first MOS transistor 3411 of each of the branch regulation circuits 341
  • the drains of the drains are respectively electrically connected to the antenna unit 100 and connected to the positive pole of the power supply through
  • the switch of the corresponding input information of the adjustment input unit 10 realizes the on and off control of the first MOS transistor 3411 of the corresponding branch regulation circuit 341, thereby realizing the control of the high Grading selection of the effective amplitude of the excitation signal output by the feed circuit 30 in the form of a frequency integrated circuit.
  • the excitation signal amplitude adjustment unit 34 includes at least two branch adjustment circuits 341, each of which
  • the branch regulation circuit 341 includes a first MOS transistor 3411 and a second MOS transistor 3412, wherein the source of the first MOS transistor 3411 of the same branch regulation circuit 341 is electrically connected to the second MOS transistor.
  • the drain of the transistor 3412 wherein the gate of the second MOS transistor 3412 of each of the branch regulation circuits 341 is electrically connected to the voltage-controlled oscillation unit 33, the second of each of the branch regulation circuits 341
  • the sources of the MOS transistors 3412 are grounded, and the drains of the first MOS transistors 3411 of each of the branch regulation circuits 341 are respectively electrically connected to the antenna unit 100 and respectively connected to a power supply via a resistor/inductor 344 Positive electrode, the gates of the first MOS transistors 3411 of each of the branch regulation circuits 341 are respectively electrically connected to the digital logic processing unit 32, so that in the aforementioned structural form of the Doppler microwave detection device, Based on the above circuit structure of the excitation signal amplitude adjustment unit 34, in the state of maintaining the independence of the operating frequency and impedance of the feeding circuit 30, the switching of the corresponding input information of the adjustment input unit 10 realizes the corresponding The turn-on and turn-off control of the first MOS transistor 3411 of the branch regulation
  • the second MOS transistors 3412 of each of the branch regulation circuits 341 are equivalently arranged as at least two MOS transistors connected in parallel.
  • FIG. 5C another modified structure of the circuit structure of the excitation signal amplitude adjustment unit 34 shown in FIG. 5A is illustrated, wherein the excitation signal amplitude adjustment unit 34 includes at least two branch adjustment circuits 341, wherein Each of the branch regulation circuits 341 includes a first MOS transistor 3411 and a second MOS transistor 3412, wherein the source of the first MOS transistor 3411 of the same branch regulation circuit 341 is electrically connected to the second MOS transistor 3412.
  • the drains of the MOS transistors 3412 wherein the gates of the second MOS transistors 3412 of each of the branch regulation circuits 341 are electrically connected to the voltage-controlled oscillation unit 33, and the first gates of each of the branch regulation circuits 341 are electrically connected to the voltage-controlled oscillation unit 33.
  • the sources of the two MOS transistors 3412 are grounded, wherein the drains of the first MOS transistors 3411 of each of the branch regulation circuits 341 are respectively connected to the positive pole of the power supply via a first inductor 344, wherein each of the first inductors 344 is connected to the positive pole of the power supply.
  • the third inductance 346 is grounded, one end of the other third inductance 346 is electrically connected to the antenna unit 100, and the other end is grounded to form the first MOS transistor 3411 of each branch regulation circuit 341
  • the mutual coupling electrical connection relationship between the drain of the antenna unit 100 and the antenna unit 100, wherein the gates of the first MOS transistors 3411 of each of the branch regulation circuits 341 are respectively electrically connected to the digital logic processing Unit 32, in this way, in the aforementioned structural form of the Doppler microwave detection device, based on the above-mentioned circuit structure of the excitation signal amplitude adjustment unit 34, the independence of the operating frequency and impedance of the feeding circuit 30 is maintained state, the switch of the corresponding input information of the adjustment
  • the two third inductances 346 coupled to each other are implemented as a transformer with a center tap.
  • the excitation signal amplitude adjustment unit 34 includes at least two branch adjustment circuits 341, wherein each of the branch adjustment circuits 341 includes a branch inductance/resistor 3411 and a branch MOS transistor 3412, wherein the same branch adjustment One end of the branch inductance/resistor 3411 of the circuit 341 is electrically connected to the drain of the branch MOS transistor 3412, wherein the other end of the branch inductance/resistor 3411 of each branch regulation circuit 341 is electrically connected
  • the voltage-controlled oscillation unit 33 and the antenna unit 100 are connected to the positive pole of the power supply through a resistor/inductor 344, and the sources of the branch MOS transistors 3412 of each of the branch regulation circuits 341 are grounded, and each of the The gates of the branch MOS transistors 3412 of the branch regulation circuit 341 are respectively electrically connected to the digital logic processing unit 32, so that in the aforementioned structural form of the Doppler microwave detection device, based on the excitation signal
  • the excitation signal amplitude adjustment unit 34 includes at least two branch adjustment circuits 341, wherein each of the branch adjustment circuits 341 includes a branch resistance/inductance 3411, a first MOS transistor 3412 and a second MOS transistor 3413, wherein the source of the first MOS transistor 3412 of the same branch regulation circuit 341 is electrically connected to the drain of the second MOS transistor 3413, the same branch
  • the drain of the first MOS transistor 3412 of the regulating circuit 341 is connected to the positive pole of the power supply through the branch resistor/inductor 3411, wherein the gates of the second MOS transistor 3413 of each branch regulating circuit 341 are electrically connected
  • the sources of the second MOS transistors 3413 of each of the branch regulation circuits 341 are electrically connected to the antenna unit 100 and grounded via a resistor/inductor 344, each of the The gates of the first MOS transistors 3412 of the branch regulation circuit 341 are respectively
  • any of the MOS transistors can be equivalently replaced with triodes, which is not limited in the present invention.
  • the intermediate frequency signal output adjustment unit 80 has two transmission ends 801 and includes at least two branch current limiting circuits 82, wherein each branch current limiting circuit 82 includes a branch resistance/inductance 821 and a branch MOS transistor 822 , wherein the drains of the branch MOS transistors 822 of the same branch current limiting circuit 82 are electrically connected to one end of the branch resistance/inductance 821, and the branch resistance/inductance of each branch current limiting circuit 82
  • the other end of 821 is electrically connected to the two transmission ends 801 of the intermediate frequency signal output adjustment unit 80, the source of the branch MOS transistor 822 of each branch current limiting circuit 82 is grounded, and each branch The gates of the branch MOS transistors of the current limiting circuit 82 are electrically connected
  • the on-off control of the branch MOS transistor 822 of the branch current limiting circuit 82 adjusts the impedance to ground between the two transmission ends 801 of the intermediate frequency signal output adjustment unit 80, corresponding to the intermediate frequency signal
  • the output adjustment unit 80 is electrically connected to the frequency mixing unit 40 at one of the transmission ends 801, and is electrically connected to the intermediate frequency amplifying unit 50 at the other transmission end 801 to form the intermediate frequency signal output adjustment
  • the unit 80 is set between the mixing unit 40 and the intermediate frequency amplifying unit 50, or the intermediate frequency signal output adjustment unit 80 is electrically connected to the intermediate frequency amplifying unit 50 at one of the transmission terminals 801, and the other transmission end 801 is electrically connected to the signal processing unit 60 to form a state in which the intermediate frequency signal output adjustment unit 80 is arranged between the intermediate frequency amplification unit 50 and the signal processing unit 60, Based on the switching of the corresponding input information of the adjustment input unit 10, the transmission efficiency of the Doppler intermediate frequency signal delivered from the frequency mixing unit 40 to the intermediate frequency amplification unit
  • the transmission efficiency of the Doppler intermediate frequency signal to the signal processing unit 60 so that when the signal processing unit 60 extracts the effective features of the Doppler intermediate frequency signal based on the corresponding threshold value setting, the The equivalent adjustment of the threshold value setting of the adjustment input unit 10 realizes the stepless adjustment or step-by-step setting of the sensitivity of the Doppler microwave detection device by switching the corresponding input information of the adjustment input unit 10.
  • the intermediate frequency signal output adjustment unit 80 further includes a current limiting resistor/inductor 81 connected between the two transmission ends 801, wherein each of the branch resistors/inductors 821 is electrically connected to the two One end of the transmission end 801 is optionally electrically connected to the two transmission ends 801 in the state of being electrically connected to the same end of the current limiting resistor/inductor 81 .
  • any of the MOS transistors in the intermediate frequency signal output adjustment unit 80 can An equivalent replacement is a triode, which is not limited in the present invention.
  • the intermediate frequency amplifying unit 50 includes an amplifier 51, an input resistor 52, a feedback resistor 53, a DC blocking capacitor 54, at least one branch input circuit 55 connected in parallel to the input resistor 52 and connected in parallel to the At least one branch feedback circuit 56 of the feedback resistor 53, wherein one end of the input resistor 52 is electrically connected to the negative input end of the amplifier 51, and the other end of the input resistor 52 is grounded through the DC blocking capacitor 56 , wherein one end of the feedback resistor 53 is electrically connected to the output end of the amplifier 51, and the other end of the feedback resistor 53 is electrically connected to the negative input end of the amplifier 51, wherein each of the branch input circuits 55 includes a branch input switch tube 551 and a branch input resistor 552 connected in series with the branch input switch tube 551, wherein each branch feedback circuit 56 includes a branch feedback switch tube 561 and a branch feedback switch tube 561 connected in series A branch feedback resistor 562, wherein the branch input switch 551 and the branch feedback
  • the intermediate frequency amplifying unit 50 includes an amplifier 51, an input resistor 52, a feedback resistor 53, a DC blocking capacitor 54, at least one branch input circuit 55 connected in parallel to the input resistor 52 and connected in parallel to the At least one branch feedback circuit 56 of the feedback resistor 53, wherein one end of the input resistor 52 is electrically connected to the negative input end of the amplifier 51, and the other end of the input resistor 52 is connected to the DC blocking capacitor 56 Electrically connected to the mixing unit 40, wherein one end of the feedback resistor 53 is electrically connected to the output end of the amplifier 51, and the other end of the feedback resistor 53 is electrically connected to the negative pole of the amplifier 51 Input terminal, wherein each branch input circuit 55 includes a branch input switch tube 551 and a branch input resistor 552 connected in series with the branch input switch tube 551, wherein each branch feedback circuit 56 includes a branch feedback switch tube 561 and A branch feedback resistor 562 connected in series with the branch feedback switch 561, wherein the branch input switch 5
  • branch input switch tube 551 and/or the branch feedback switch tube 561 of the intermediate frequency amplifying unit 50 may be implemented as a MOS tube or a triode, which is not limited in the present invention.
  • the excitation signal fed to the antenna unit 100 The effective amplitude V n is a variable, based on the corresponding relationship between the energy density distribution of the microwave beam and the noise floor value of the corresponding Doppler intermediate frequency signal, the energy density distribution of the microwave beam and the excitation signal Correlation curves between effective amplitudes V n and the correspondingly formed actual detection space are shown respectively.
  • the correlation curve has a segment that tends to change linearly, corresponding to the excitation
  • the amplitude section V I V II section of the signal when the effective amplitude V n of the excitation signal is adjusted or set in steps in the amplitude section V I V II section, due to the microwave beam
  • the responsivity of the energy density distribution of the amplitude segment V I V II to the change of the effective amplitude V n of the excitation signal tends to change linearly, and the energy efficiency of the microwave detection device can be guaranteed.
  • the actual detection space formed based on the energy density distribution of the microwave beam emitted by the antenna unit 100 is a space bounded by a gradient boundary, wherein the gradient boundary is the energy density distribution of the corresponding microwave beam Attenuation to a certain degree of space has non-determinism, corresponding to FIG. 8, it can be seen that the change of the effective amplitude V n of the excitation signal will change the energy density distribution of the microwave beam, but because the beam of the antenna unit 100 The angle is constant, that is, the outer boundary corresponding to the dashed line in Fig.
  • the energy density of the microwave beam formed by the change of the effective amplitude V of the excitation signal The distribution change is mainly reflected in the adjustment of the inner boundary of the gradient boundary of the actual detection space.
  • the change of the gradient boundary is not obvious , correspondingly the energy efficiency of the microwave detection device is relatively low.
  • the excitation signal is a high-frequency microwave signal
  • its effective amplitude V n is difficult to be represented concretely.
  • the effective amplitude V n of the excitation signal as described in the product form
  • it may optionally be expressed in "dB" corresponding to Fig. 9 It expresses the relative changes among the effective amplitudes V n of the excitation signals corresponding to different gears.
  • the change of the effective amplitude V n of the excitation signal is represented as a change in the effective current and/or effective voltage output by the feed circuit 30 in the actual circuit, when characterizing or judging the effective amplitude of the excitation signal
  • the change of the effective amplitude V n of the excitation signal can optionally be characterized or judged by the change of the effective current and/or the effective voltage output by the feed circuit 30 .
  • the effective amplitude V n of the excitation signal of the Doppler microwave detection device can be adjusted, based on the effective amplitude V n of the excitation signal and the Doppler microwave detection device
  • the relevance of the energy density distribution of the emitted microwave beam, the actual detection space bounded by the gradient boundary can be adjusted, wherein the attenuation of the microwave beam in the same medium layer, the reflectivity,
  • the characteristic that the penetration rate tends to be constant, in the actual detection space, the adjustment based on the amplitude of the excitation signal is compatible with the target detection space bounded by walls, glass or metal plate layers, that is, the The state where the inner boundary of the gradient boundary is compatible with the target detection space, the field strength of the microwave beam outside the target detection space can be reduced, which is beneficial based on the effective amplitude of the excitation signal
  • the adjustment of Vn eliminates environmental interference and action interference outside the target detection space, and reduces the electromagnetic interference of the Doppler microwave detection device on the target detection space, and
  • the radiation loss of the microwave detection device is reduced to reduce the radiation power consumption.
  • the intensity of the echo signal formed by the reflection of the microwave beam by the wall, glass or metal plate layer defining the target detection space can also be reduced, so that there is a state of highly reflective objects in the target detection space and in the The target detection space is in the state of a small non-open space, which reduces the probability of self-excited interference generated by the Doppler microwave detection device based on multipath reflection.
  • the amplitude adjustment of the excitation signal has a relatively clear detection boundary because it can adjust the actual detection space, which is beneficial to ensure that the Doppler microwave detection device is in the actual Stability and accuracy in probing applications.
  • the correlation curve between the distance d and the amplitude A of the Doppler intermediate frequency signal has an amplitude segment A n1 A n2 in which ⁇ A/ ⁇ d meets certain numerical requirements, specifically in the amplitude of the excitation signal
  • V I it corresponds to the A I1 A I2 segment in the figure
  • V II when the amplitude of the excitation signal is V II , it corresponds to the A II1 A II2 segment in the figure, and in the A n1 A n2 segment with the amplitude segment
  • the amplitude A of the Doppler intermediate frequency signal tends to be gentle with the change of the distance d, that is, according to the sensitivity of the Do
  • the effective amplitude V n of the excitation signal of the Doppler microwave detection device is fixed at the When the amplitudes VI and VII of the preset amplitude segment V I V II , the corresponding sensitivity adjustment spaces correspond to d I1 d I2 and d II1 d II2 respectively, corresponding to the guarantee based on the Doppler microwave detection.
  • the deterministic state of the boundary of the effective detection space defined by the sensitivity setting of the device, the position of the sensitivity adjustment space is fixed and the range is narrow so that the adjustable range of the boundary of the effective detection space is narrow and cannot be adapted to different Defects in the target detection space.
  • the sensitivity of the Doppler microwave detection device is adjusted or set in steps, so that in the distance section d n1 d n2 corresponding to the amplitude section A n1 A n2 section
  • the boundary of the effective detection space is set correspondingly in the sensitivity adjustment space defined by the paragraph, corresponding to the state in which the effective amplitude V n of the excitation signal is associated with the actual detection space, so as to control the excitation
  • the adjustment combination of the effective amplitude V n of the signal is to the stepless adjustment or the setting of the steps of the sensitivity of the Doppler microwave detection device, in the guarantee based on the sensitivity setting defined by the Doppler microwave detection device.
  • the adjustable range of the boundary of the effective detection space is expanded, that is, when the sensitivity adjustment method is used alone, the range of the distance segment d n1 d n2 is avoided. It is defined that in the state of ensuring the certainty of the boundary of the effective detection space, the position of the sensitivity adjustment space is fixed and the range is narrow so that the adjustable range of the boundary of the effective detection space is narrow and cannot be adapted to different target detection spaces. defect.
  • the adjustment of the effective amplitude V n of the excitation signal is combined with the stepless adjustment or step-by-step setting of the sensitivity of the Doppler microwave detection device, wherein the energy density of the microwave beam is distributed between Under the limitation that there is a relatively low correlation between the detection direction of the vertical Doppler microwave detection device and the amplitude of the excitation signal, on the basis of adjusting the amplitude of the excitation signal, the The stepless adjustment or step-by-step setting of the sensitivity of the Doppler microwave detection device can ensure the adjustable range of the boundary of the effective detection space in the direction perpendicular to the detection direction of the Doppler microwave detection device.
  • the adjustment of the effective amplitude V n of the excitation signal is combined with the stepless adjustment or step-by-step setting of the sensitivity of the Doppler microwave detection device, wherein the energy density of the microwave beam is distributed in the vertical
  • the stepless adjustment or step setting of the sensitivity of the Doppler microwave detection device can guarantee the adjustable range of the boundary of the effective detection space in the detection direction perpendicular to the Doppler microwave detection device.
  • the adjustment of the effective amplitude V n of the excitation signal is combined with the stepless adjustment or step-by-step setting of the sensitivity of the Doppler microwave detection device, expanding the boundary of the effective detection space While the range can be adjusted, the certainty of the boundary of the effective detection space defined based on the sensitivity setting of the Doppler microwave detection device can be guaranteed, wherein the effective detection space of the same or similar spatial range can be based on
  • the combination of different sensitivity levels and amplitude levels of the excitation signal is realized, so as to allow biased selection based on high precision (high amplitude and low sensitivity) or low power consumption (low amplitude and high sensitivity) in actual use, switching
  • the combination of the corresponding sensitivity level and the amplitude level of the excitation signal is conducive to improving the applicability of the Doppler microwave detection device to different application environments and application requirements.
  • the present invention further provides a detection boundary adaptive adjustment method of a Doppler microwave detection device, wherein the adjustment control circuit 20 is provided with an adaptive classification, wherein the signal processing unit 60 is preset with a preset Assuming a noise floor value A 0 , where the adjustment control circuit 20 is adjusted to the state of the adaptive classification based on the selection of the corresponding input information of the adjustment input unit 10, the adjustment control circuit 20 controls the feed
  • the amplitude of the excitation signal generated by the circuit 30 is at the initial value of VII , based on the energy density distribution of the microwave beam between the detection direction of the Doppler microwave detection device and the amplitude of the excitation signal Relatively high correlation, in the state of no one in the target detection area, the adjustment control circuit 20 adaptively adjusts the feed from large to small in the preset amplitude range V I V II of the excitation signal
  • the effective amplitude V n of the excitation signal generated by the circuit 30, the signal processing unit 60 reads the frequency spectrum and energy spectrum of the Dopp
  • the target detection space is in the state of a small space (narrow space) or a high reflection coefficient space, so as to avoid that the actual detection space corresponding to the effective amplitude V n of the excitation signal is much larger than the target detection space and thus generate a natural Exciting interference, and the state of action interference such as curtain fluttering outside the target detection space, avoiding the actual detection space corresponding to the effective amplitude V n of the excitation signal from covering to the target detection space External interference caused by malfunction.
  • the determination that the noise floor value Ak of the Doppler intermediate frequency signal is less than or equal to the preset noise floor value A0 It is allowed to determine the difference range based on the noise floor value A k of the Doppler intermediate frequency signal and the preset noise floor value A 0 , as in the noise floor value A k of the Doppler intermediate frequency signal and the When the difference of the preset noise floor value A 0 is less than a preset difference value, it is determined that the noise floor value A k of the Doppler intermediate frequency signal is less than or equal to the preset noise floor value A 0 , which is not limited in the present invention.
  • the adjustment control circuit 20 continues to adjust the effective amplitude V of the excitation signal from large to small in the preset amplitude range VI V II of the excitation signal with V H as the maximum amplitude limit.
  • the signal processing unit 60 reads the noise floor value A k of the Doppler intermediate frequency signal corresponding to the effective amplitude V n of the excitation signal, and the read Doppler intermediate frequency
  • the noise floor value A k of the signal is the noise floor value of the environment, and the corresponding information between the environment noise floor value of the current environment and the effective amplitude V of the corresponding said excitation signal is established, so as to be based on moving objects (such as waving hands or The position of the walking human body) is the boundary of the target detection space for the purpose of adaptively setting the target detection space, and there is a state of moving objects in the target detection area, and the adjustment control circuit 20 is in the The amplitude segment V I V II of the excitation signal takes V H as the maximum amplitude limit to adjust the effective amplitude V
  • the detection boundary adaptive adjustment method of the Doppler microwave detection device includes the steps of:
  • the noise floor value A k of the Doppler intermediate frequency signal in the frequency spectrum, energy spectrum, power spectrum or amplitude under the corresponding effective amplitude V n of the excitation signal, and compare the read The noise floor value A k of the Doppler intermediate frequency signal and the preset noise floor value A 0 , the read noise floor value A k of the Doppler intermediate frequency signal is less than or equal to the preset noise floor
  • the value A is 0
  • the maximum amplitude of the excitation signal adapted to the current environment is taken as the amplitude V H of the corresponding excitation signal
  • the noise floor value A k of the Doppler intermediate frequency signal read is
  • the amplitude threshold is the threshold value of the amplitude A of the Doppler intermediate frequency signal to set the sensitivity of the Doppler microwave detection device, so that the effective detection space bounded by the position of the moving object
  • the adaptive setting of can guarantee the certainty of the effective detection boundary.
  • the expression of the state of no one in the target detection area in the step S1 and the expression of the state of the presence of moving objects in the target detection area in the step S3 are the execution of the step S1 and the step S2
  • the rationality of the detection boundary adaptive adjustment method of the device does not constitute a restriction on whether there is a human body/moving object in the use environment of the Doppler microwave detection device, nor does it constitute the detection boundary of the Doppler microwave detection device.
  • the adaptive adjustment method includes the limitation of the step of judging whether there is a human body/moving object in the target detection area.
  • the state of no one in the target detection area in the step S1 and the state of moving objects in the target detection area in the step S3 correspond to the reception of corresponding instructions by the Doppler microwave detection device, as described
  • the Doppler microwave detection device executes the step S1 based on receiving a first instruction sent by the user, and executes the step S3 based on receiving a second instruction sent by the user, wherein the target detection area in the step S1
  • the expression of the state of no one and the expression of the state of moving objects in the target detection area in the step S3 are reasonable expressions of the timing for the user to send the first instruction and the second instruction.
  • the setting of the sensitivity of the Doppler microwave detection device corresponds to the setting of the sensitivity of the signal processing unit 60 Threshold value adjustment of the frequency spectrum, energy spectrum, power spectrum or amplitude A of the Doppler intermediate frequency signal.
  • setting the sensitivity of the Doppler microwave detection device corresponds to adjusting the magnification of the intermediate frequency amplifying unit 50 .
  • the setting of the sensitivity of the Doppler microwave detection device corresponds to the setting of the ground impedance of the adjustment unit 80 for the intermediate frequency signal output adjust.
  • the effective detection space based on the same or similar spatial range can be realized based on different combinations of sensitivity levels and amplitude levels of the excitation signal, thus allowing high-precision (high-amplitude low sensitivity) or low power consumption (low amplitude and high sensitivity), or switch the combination of the corresponding sensitivity gear and the amplitude gear of the excitation signal to improve the performance of the Doppler microwave detection device in different application environments and applications
  • the detection boundary adaptive adjustment method of the Doppler microwave detection device further includes the steps of:
  • step S6 further comprising steps:
  • amplitude A of the Doppler intermediate frequency signal in the frequency spectrum, energy spectrum, power spectrum or amplitude under the corresponding effective amplitude V n of the excitation signal, and compare the read
  • the amplitude A of the Doppler intermediate frequency signal and the amplitude threshold corresponding to the effective amplitude V n are switched from the amplitude A of the Doppler intermediate frequency signal greater than the amplitude threshold corresponding to the effective amplitude V n based on the comparison result until the amplitude A of the Doppler intermediate frequency signal is smaller than the amplitude threshold corresponding to the effective amplitude V n , reduce the effective amplitude V n of the excitation signal, and with the reduced effective amplitude V
  • the amplitude threshold corresponding to n is the threshold value of the amplitude A of the Doppler intermediate frequency signal to set the sensitivity of the Doppler microwave detection device to reduce the sensitivity of the Doppler microwave detection device after the human body leaves. power consumption in the alert state; and
  • amplitude A of the Doppler intermediate frequency signal in the frequency spectrum, energy spectrum, power spectrum or amplitude under the corresponding effective amplitude V n of the excitation signal, and compare the read
  • the amplitude A of the Doppler intermediate frequency signal and the amplitude threshold corresponding to the effective amplitude V n are switched from the amplitude A of the Doppler intermediate frequency signal smaller than the amplitude threshold corresponding to the effective amplitude V n based on the comparison result until the amplitude A of the Doppler intermediate frequency signal is greater than the amplitude threshold corresponding to the effective amplitude V n , increase the effective amplitude V n of the excitation signal, and with the increased effective amplitude V
  • the amplitude threshold corresponding to n is the threshold value of the amplitude A of the Doppler intermediate frequency signal to set the sensitivity of the Doppler microwave detection device to ensure that the Doppler microwave detection device is in the presence of human activities. detection accuracy in the environment.
  • the adjustment of the effective amplitude V n of the excitation signal is combined with the stepless adjustment or step-by-step setting of the sensitivity of the Doppler microwave detection device In this way, the actual detection space bounded by the gradient boundary can be adjusted based on the change of the gradient boundary, and at the same time, the effective detection defined by the sensitivity setting of the Doppler microwave detection device can be guaranteed.
  • the certainty of the boundary of the space and the expansion of the adjustable range of the boundary of the effective detection space, the input information of the adjustment input unit 10 corresponding to the different levels of the adjustment control circuit 20 and the corresponding scene or size The adaptation relationship of the target detection space can be intuitively shown based on the adaptability of the size of the actual detection space/the effective detection space and the corresponding target detection space, so as to facilitate the user to target different scenarios or sizes.
  • the target detection space according to the adaptation relationship between the input information of the adjustment input unit 10 and the target detection space under the corresponding scene or size, it is easy to select the appropriate classification of the adjustment control circuit 20, which is beneficial in The microwave invisible state pervades the Doppler microwave detection device.

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Abstract

L'invention concerne un dispositif de détection de micro-ondes Doppler et un procédé d'ajustement adaptatif de limite de détection associé. Le dispositif de détection de micro-ondes Doppler comprend une unité d'entrée d'ajustement (10), un circuit d'alimentation (30), une unité de mélange de fréquences (40) et une unité d'antenne (100). Le circuit d'alimentation (30) est électriquement connecté à l'unité de mélange de fréquences ( 40) et alimente et est connecté à l'unité d'antenne (100), pour transmettre un signal d'excitation à l'unité de mélange de fréquences (40) et pour alimenter l'unité d'antenne (100) à l'aide du signal d'excitation. L'unité d'entrée d'ajustement (10) est connectée électriquement au circuit d'alimentation (30) et utilisée en tant que fenêtre d'interaction homme-ordinateur du dispositif de détection de micro-ondes Doppler. Dans l'état de maintien de l'indépendance de la fréquence de fonctionnement et de l'impédance du circuit d'alimentation (30), sur la base de la sélection d'informations d'entrée correspondantes de l'unité d'entrée d'ajustement (10), l'amplitude effective du signal d'excitation est ajustée et la sensibilité du dispositif de détection de micro-ondes Doppler est réglée.
PCT/CN2022/133032 2021-11-19 2022-11-19 Dispositif de détection de micro-ondes doppler et son procédé d'ajustement adaptatif de limite de détection WO2023088451A1 (fr)

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EP1610147A1 (fr) * 2004-06-22 2005-12-28 Robert Bosch Gmbh Radar monopuce pour véhicule automobile
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