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WO2021003841A1 - Procédé et dispositif de détection de corps vivant, et enregistreur de conduite - Google Patents

Procédé et dispositif de détection de corps vivant, et enregistreur de conduite Download PDF

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Publication number
WO2021003841A1
WO2021003841A1 PCT/CN2019/105916 CN2019105916W WO2021003841A1 WO 2021003841 A1 WO2021003841 A1 WO 2021003841A1 CN 2019105916 W CN2019105916 W CN 2019105916W WO 2021003841 A1 WO2021003841 A1 WO 2021003841A1
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Prior art keywords
signal
detection
signals
target
reflected wave
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Ceased
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PCT/CN2019/105916
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English (en)
Chinese (zh)
Inventor
陈志勇
陈智
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Senseed Technologies Co Ltd
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Senseed Technologies Co Ltd
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Publication of WO2021003841A1 publication Critical patent/WO2021003841A1/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
    • G01S15/00—Systems using the reflection or reradiation of acoustic waves, e.g. sonar systems
    • G01S15/02—Systems using the reflection or reradiation of acoustic waves, e.g. sonar systems using reflection of acoustic waves
    • G01S15/06—Systems determining the position data 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
    • G01S19/00—Satellite radio beacon positioning systems; Determining position, velocity or attitude using signals transmitted by such systems
    • G01S19/38—Determining a navigation solution using signals transmitted by a satellite radio beacon positioning system
    • G01S19/39—Determining a navigation solution using signals transmitted by a satellite radio beacon positioning system the satellite radio beacon positioning system transmitting time-stamped messages, e.g. GPS [Global Positioning System], GLONASS [Global Orbiting Navigation Satellite System] or GALILEO
    • G01S19/42—Determining position
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
    • G01V1/00—Seismology; Seismic or acoustic prospecting or detecting
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
    • G01V3/00—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation
    • G01V3/12—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation operating with electromagnetic waves
    • G—PHYSICS
    • G07—CHECKING-DEVICES
    • G07C—TIME OR ATTENDANCE REGISTERS; REGISTERING OR INDICATING THE WORKING OF MACHINES; GENERATING RANDOM NUMBERS; VOTING OR LOTTERY APPARATUS; ARRANGEMENTS, SYSTEMS OR APPARATUS FOR CHECKING NOT PROVIDED FOR ELSEWHERE
    • G07C5/00—Registering or indicating the working of vehicles
    • G07C5/08—Registering or indicating performance data other than driving, working, idle, or waiting time, with or without registering driving, working, idle or waiting time
    • G07C5/0841—Registering performance data
    • G07C5/085—Registering performance data using electronic data carriers
    • G07C5/0866—Registering performance data using electronic data carriers the electronic data carrier being a digital video recorder in combination with video camera

Definitions

  • the invention relates to the technical field of life body detection, in particular to a life body detection method, equipment and driving recorder.
  • Infrared detection technology is greatly affected by temperature.
  • the temperature inside the car rises to a certain level and it is easy to misdetect.
  • Motion sensor technology is easily affected by the surrounding environment. Therefore, ultrasonic detection is more commonly used, but when ultrasonic detection is used, there will be a problem of missed detection.
  • the embodiments of the present invention provide a life body detection method, equipment, and driving recorder to solve the problem of missed detection when using a radio frequency transmitter to transmit radio wave detection and ultrasonic detection.
  • an embodiment of the present invention provides a life body detection method, which is applied to a life body detection device.
  • the life body detection device includes at least two signal transmitters and signal receivers corresponding to each signal transmitter.
  • the distribution of each signal transmitter in the life body detection equipment satisfies: the union of the sub-regions covered by the signal transmitted by each signal transmitter covers the area to be detected; the method includes:
  • the signal transmitter transmits the modulated detection wave signal
  • the signal receiver receives the reflected wave signal corresponding to each modulated detection wave signal
  • the life body detection method provided by the embodiment of the present invention modulates the generated detection wave signal to obtain at least two modulated detection wave signals, and transmits each modulated detection wave signal to the detector to be detected by setting signal transmitters with different positions The sub-areas of the area; where the distribution of the signal transmitters in the life body detection equipment meets: the union of the sub-areas covered by the signals transmitted by the signal transmitters covers the area to be detected; receiving and each modulated detection wave signal The corresponding reflected wave signal is decoded and demodulated separately for each reflected wave signal to obtain the target signal.
  • the method can realize synchronous detection of the entire coverage area of the area to be detected, and avoid the occurrence of missed detection.
  • the technical scheme of the present invention has the advantages of high detection accuracy, large coverage, and low missed detection rate.
  • modulating the detection wave signal to obtain at least two modulated detection wave signals includes:
  • the detection wave signal is modulated by using at least two address codes to obtain at least two modulation detection wave signals, wherein the address code corresponds to the modulation detection wave signal.
  • decoding the reflected wave signal includes:
  • the reflected wave signal is decoded using a reference address code, wherein the reference address code corresponds to an address code, and the address code is an address code for modulating the modulated detection wave signal corresponding to the reflected wave signal.
  • the demodulating the reflected wave signal to obtain the target signal includes:
  • detecting whether the target signal includes a vital sign signal includes:
  • the frequency of the vital sign signal is greater than the second threshold, it is determined that the target signal contains the vital sign signal.
  • the life body detection method further includes the following steps:
  • the two target signals/decoded reflected wave signals corresponding to the two target signals are correlated, the time difference between the same signals is calculated, and the life body is obtained according to the time difference The difference in the distance to the two signal receivers;
  • the angle between the position of the living body and the connection between the two signal receivers is calculated to obtain the living body The orientation.
  • embodiments of the present invention provide a life body detection device, a transmission waveform generation module, an encoder, a signal transmitter, a signal receiver, a decoder, and a signal processing module, wherein the encoder and the The number of signal transmitters, the signal receivers, and the decoders are the same, at least two, and the signal transmitters and the signal receivers are arranged correspondingly, and the encoders and decoders are arranged correspondingly, The distribution of each signal transmitter in the life body detection device satisfies: the union of each sub-region covered by the signal emitted by each signal transmitter covers the area to be detected;
  • the emission waveform generation module is used to generate a detection wave signal
  • the encoder is used to modulate the detection wave signal to obtain a modulated detection wave signal
  • the signal transmitter is used to transmit a modulated detection wave signal
  • the signal receiver is used to receive reflected wave signals
  • the decoders are respectively used to decode the reflected wave signals
  • the signal processing module is used to demodulate the decoded reflected wave signal to obtain the target signal; detect whether each target signal contains a vital sign signal, and determine if there is a vital sign signal in at least one target signal It is stated that there are living bodies in the area to be detected.
  • each signal transmitter in the life body detection device satisfies: each sub-region of the area to be detected has at least two signal transmitters emitting The detection wave signal can be covered.
  • the signal processing module is further configured to:
  • the two target signals/decoded reflected wave signals corresponding to the two target signals are correlated, the time difference between the same signals is calculated, and the life body is obtained according to the time difference The difference in the distance to the two signal receivers;
  • the angle between the position of the living body and the connection between the two signal receivers is calculated to obtain the living body The orientation.
  • an embodiment of the present invention also provides a driving recorder, including the second aspect and the life body detection device provided by any one of the second aspects.
  • FIG. 1 is a schematic flow chart of a method for detecting a living body in Embodiment 1 of the present invention
  • FIG. 2 is a schematic diagram of modulating the detection wave signal in Embodiment 1 of the present invention.
  • Embodiment 3 is a schematic diagram of demodulating reflected wave signals in Embodiment 1 of the present invention.
  • FIG. 4 is a schematic flowchart of a method for detecting a living body in Embodiment 2 of the present invention.
  • FIG. 5 is a schematic diagram of the orientation of living bodies in Embodiment 2 of the present invention.
  • FIG. 6 is a schematic structural diagram of a specific life body detection device in Embodiment 3 of the present invention.
  • FIG. 7 is a schematic diagram of the coverage area of each group of transceiver devices in a specific life body detection equipment in Embodiment 3 of the present invention.
  • FIG. 8 is a schematic flowchart of a method for reminding life bodies in a vehicle based on a driving recorder in Embodiment 4 of the present invention.
  • the most commonly used ultrasonic detection technology for life detection but there is a problem of missing detection. After analysis, it is mainly due to the small beam angle of the ultrasonic sensor, especially due to the detection distance and detection of the ultrasonic sensor. The contradiction of the angle caused some areas in the car to be undetected, leading to missed detection.
  • Embodiment 1 of the present invention provides a life body detection method, which is applied to a life body detection device.
  • the life body detection device includes at least two signal transmitters and signal receivers corresponding to each signal transmitter.
  • the distribution of the sensors in the life body detection equipment satisfies: the union of the sub-regions covered by the signals emitted by the signal transmitters covers the area to be detected.
  • the area to be detected may be a vehicle or a partial area of the vehicle.
  • Fig. 1 is a schematic flow chart of the life body detection method in Embodiment 1 of the present invention. As shown in Fig. 1, the process includes the following steps:
  • S101 Generate a detection wave signal, and modulate the detection wave signal to obtain at least two modulated detection wave signals.
  • a microcomputer may be used to control the emission waveform generation module to generate a detection wave signal, and the detection wave signal may be an ultrasonic signal or other types of detection wave signals.
  • modulating the detection wave signal to obtain at least two modulated detection wave signals includes: modulating the detection wave signal by using at least two address codes to obtain at least two modulated detection wave signals,
  • the address code corresponds to the modulated detection wave signal.
  • the address code 1 is used to modulate the detection wave signal to obtain the first modulation detection wave signal;
  • the address code 2 is used to modulate the detection wave signal to obtain the second modulation detection wave signal.
  • the code division multiplexing technology is a multiplexing method that distinguishes the original signals of each channel by different codes.
  • FIG. 2 is a schematic diagram of modulating the detection wave signal in Embodiment 1 of the present invention.
  • the carrier in Figure 2 is the detection wave signal generated by the transmit waveform generation module.
  • the commonly used address codes in the encoder include m sequence and walsh code.
  • the signal transmitter transmits the modulated detection wave signal.
  • a transmitting sensor may be used to transmit the modulated detection wave signal to a sub-area of the area to be detected.
  • the first emission sensor is used to transmit the first modulation detection wave signal to the first sub-area of the area to be detected
  • the second emission sensor is used to transmit the second modulation detection wave signal to the second sub-area of the area to be detected.
  • the signal receiver receives the reflected wave signal corresponding to each modulated detection wave signal.
  • the detection wave signal is emitted after contacting a living body or other objects, and the receiving sensor can be used to receive the reflected wave signal corresponding to each modulated detection wave signal.
  • the signal receiver and the signal transmitter are arranged correspondingly.
  • each receiving sensor may receive all the reflected signals.
  • S104 Respectively decode and demodulate the reflected wave signals to obtain target signals; detect whether each target signal contains a vital sign signal, and when there is a vital sign signal in at least one target signal, it is determined that there is a vital sign signal in the area to be detected Life form.
  • decoding the reflected wave signal includes: decoding the reflected wave signal using a reference address code, wherein the reference address code corresponds to an address code, and the address code corresponds to the reflected wave signal.
  • the address code for modulating the corresponding modulation detection wave signal. For example, use the reference address code 1 to decode the first reflected wave signal, where the first reflected wave signal is the reflected wave signal received by the first receiving sensor; use the reference address code 2 to decode the second reflected wave signal, where , The second reflected wave signal is the reflected wave signal received by the second receiving sensor.
  • FIG. 3 is a schematic diagram of decoding a reflected wave signal in Embodiment 1 of the present invention. In Figure 3, the received signal is the received reflected signal.
  • the reflected wave signal after decoding the reflected wave signal, it further includes amplifying and ADC sampling the decoded reflected wave signal.
  • demodulating the decoded reflected wave signal to obtain the target signal includes: multiplying the modulated detection wave signal corresponding to the reflected wave signal by the decoded reflected wave signal to obtain Product signal; low-pass filtering the product signal to obtain the target signal.
  • the first modulated detection wave signal is multiplied by the decoded first reflected wave signal to obtain the first product signal, and the first product signal is low-pass filtered to obtain the first target signal;
  • the second modulated detection wave The signal is multiplied by the decoded second reflected wave signal to obtain a second product signal, and the second product signal is low-pass filtered to obtain a second target signal.
  • one or two of the following methods can be used to detect whether the target signal contains a vital sign signal.
  • Method 1 Perform power spectrum analysis on the target signal to obtain the energy of the reflected wave signal; when the energy is less than the first threshold, it is determined that the target signal contains vital signs.
  • Method 2 Extract the change in frequency with time in the target signal through arctangent demodulation to obtain a frequency signal; perform data processing on the frequency signal to obtain a vital sign signal; when the frequency of the vital sign signal is greater than the first At the second threshold, it is determined that the target signal contains vital signs.
  • the generated detection wave signal is modulated to obtain at least two modulated detection wave signals, and each modulated detection wave signal is transmitted to the to-be-detected through signal transmitters with different positions.
  • the distribution of the signal transmitters in the life body detection equipment meets: the union of the sub-regions covered by the signals transmitted by the signal transmitters covers the area to be detected; receiving and modulating detection waves
  • the reflected wave signal corresponding to the signal is decoded and demodulated separately for each reflected wave signal to obtain the target signal.
  • the above method can realize synchronous detection of the entire coverage of the area to be detected, and avoid the occurrence of missed detection.
  • the technical solution of the present invention has the advantages of high detection accuracy, large coverage, and low missed detection rate.
  • Embodiment 2 of the present invention provides a life body detection method.
  • FIG. 4 is a schematic flowchart of the life body detection method in Embodiment 2 of the present invention. As shown in FIG. 4, steps S401 to S404 of Embodiment 2 of the present invention are the same as those of the present invention. Steps S101 to S104 of Embodiment 1 are the same, but the difference is that the following steps are further included after S404:
  • Calculating the time difference between the same signals is calculating the time difference between two target signals, or calculating the time difference between the decoded reflected wave signals corresponding to the two target signals.
  • the two target signals/decoded reflected wave signals corresponding to the two target signals are correlated, and the time difference between the same signals is calculated, According to the time difference, the distance difference between the living body and the two signal receivers is obtained.
  • the presence of the same vital sign signal in the two target signals can be understood based on the vital sign signals in the two target signals that can be judged to come from the same life body.
  • S407 Calculate the angle between the position of the living body and the connection line between the two signal receivers according to the distance between the two signal receivers and the distance difference between the living body and the two signal receivers to obtain the The orientation of the living body.
  • Fig. 5 is a schematic diagram of the orientation of living bodies in Embodiment 2 of the present invention.
  • ⁇ r represents the distance difference between the living body and the two signal receivers
  • d represents the distance between the two sensors
  • ⁇ represents the angle between the location of the living body and the connection between the two signal receivers.
  • cos ⁇ ⁇ r/d.
  • the life body detection method provided by the second embodiment of the present invention can not only realize the synchronous detection of the entire coverage area of the area to be detected, and avoid the occurrence of missed detection, but also can be based on two target signals or after decoding corresponding to the two target signals.
  • the reflected wave signal and the distance between the two signal receivers determine the orientation of the living body.
  • Embodiment 3 of the present invention provides a life body detection device, including: a transmission waveform generation module, an encoder, a signal transmitter, a signal receiver, a decoder, and a signal processing module, wherein the encoder and the signal transmitter
  • the number of the signal receiver, the signal receiver, and the decoder is the same, at least two, and the signal transmitter and the signal receiver are arranged correspondingly, and the encoder and the decoder are arranged correspondingly.
  • the distribution of transmitters in the life body detection equipment satisfies: the union of the sub-regions covered by the signals emitted by the signal transmitters is the area to be detected;
  • the emission waveform generation module is used to generate a detection wave signal
  • the encoder is used to modulate the detection wave signal to obtain a modulated detection wave signal
  • the signal transmitter is used to transmit a modulated detection wave signal
  • the signal receiver is used to receive reflected wave signals
  • the decoders are respectively used to decode the reflected wave signals
  • the signal processing module is used to demodulate the decoded reflected wave signal to obtain the target signal; detect whether each target signal contains a vital sign signal, and determine if there is a vital sign signal in at least one target signal It is stated that there are living bodies in the area to be detected.
  • the corresponding arrangement of the signal transmitter and the signal receiver can be understood as the same group of signal transmitters and signal receivers have the same setting angle.
  • the signal transmitter and the signal receiver can be integrated (that is, the same device can not only transmit the modulated detection wave signal, but also receive the reflected wave signal), or it can be set separately .
  • FIG. 6 is a schematic structural diagram of a specific life detection device in Embodiment 3 of the present invention, as shown in FIG.
  • the life body detection equipment includes 1 emission waveform generation module, 4 encoders, 4 signal transmitters, 4 signal receivers, 4 decoders and 1 signal processing module.
  • the signal transmitter adopts Transmitting sensor
  • signal receiver adopts receiving sensor; in addition, it also includes 4 power amplifiers and 4 ADC modules.
  • the working process of the specific life detection equipment of embodiment 3 of the present invention is as follows: the microcomputer controls the emission waveform generation module to generate a single frequency signal, and the encoder performs spread spectrum modulation on the single frequency signal according to each address code, and then passes through The sensor transmits a signal to the area to be detected. That is to say, the encoder 1 performs spread-spectrum modulation on the single-frequency signal according to the address code 1 to obtain the first modulation detection wave, and then transmits the first modulation detection wave to the area to be detected through the transmitting sensor 1, and the encoder 2 pairs according to the address code 2.
  • the single frequency signal is subjected to spread spectrum modulation to obtain the second modulation detection wave, and then the second modulation detection wave is transmitted to the area to be detected through the transmitting sensor 2, and so on.
  • the modulated detection wave will carry body sign information after being reflected by the human body.
  • the decoders are respectively set for demodulation according to the four modulation detection waves.
  • the receiving sensor 1 receives the reflected signal and then enters it into the decoder 1.
  • the decoder 1 uses the reference address code 1 to decode the reflected wave signal, where the address code 1 corresponds to the reference address code 1; after the receiving sensor 2 receives the reflected signal Input the decoder 2, and the decoder 2 uses the reference address code 2 to decode the reflected wave signal, where the address code 2 corresponds to the reference address code 2, and so on.
  • the signal After decoding the reflected wave signal, the signal is amplified, and then the amplified signal is sampled by ADC, and the sampled digital signal is input to the signal processing module.
  • the sampled digital signals are respectively demodulated to obtain the target signal; whether each target signal contains a vital sign signal, and when there is a vital sign signal in at least one target signal, it is determined that the to-be-detected There are life forms in the area of the organ.
  • demodulating the sampled digital signal to obtain the target signal includes: multiplying the modulated detection wave signal corresponding to the reflected wave signal with the sampled digital signal to obtain a product signal; Low-pass filter to get the target signal.
  • detecting whether the target signal includes a vital sign signal includes: performing power spectrum analysis on the target signal to obtain the energy of the reflected wave signal; when the energy is less than a first threshold, determining that the target signal includes the vital sign signal And/or, extract the change in frequency with time in the target signal through arctangent demodulation to obtain a frequency signal; perform data processing on the frequency signal to obtain a vital sign signal; when the frequency of the vital sign signal When it is greater than the second threshold, it is determined that the target signal contains vital signs.
  • Fig. 7 is a schematic diagram of the coverage area of each group of transceiving devices in a specific life body detection equipment in Embodiment 3 of the present invention.
  • Each group of transceiving devices includes a signal transmitter and a signal receiver.
  • the signal transmitter and the signal receiver are integrated, that is, a transceiver device can transmit modulated detection waves and receive reflected signals.
  • a transceiver device can transmit modulated detection waves and receive reflected signals.
  • the sector is the coverage of a group of transceiver devices.
  • the signal processing module is also used to: The signal/decoded reflected wave signal corresponding to the two target signals is correlated, the time difference between the same signal is calculated, and the distance difference between the living body and the two signal receivers is obtained according to the time difference; the calculation is The distance between the two signal receivers corresponding to the signal; calculate the location of the living body and the two signals according to the distance between the two signal receivers and the distance difference between the living body and the two signal receivers The angle of the connection between the receivers is used to obtain the orientation of the living body.
  • a specific life body detection device of Embodiment 3 of the present invention can realize synchronous detection of the entire coverage area of the area to be detected by adjusting the position of each transceiver device and using the method of multi-code partitioning, and at the same time, there are at least two The transceiver device can detect, and can also determine the orientation of the life body based on the two target signals or the decoded reflected wave signals corresponding to the two target signals, and the distance between the two signal receivers.
  • Embodiment 4 of the present invention provides a driving recorder, including the life body detection equipment described in Embodiment 3.
  • FIG. 8 is a schematic flowchart of a method for reminding life bodies in a vehicle based on a driving recorder in Embodiment 4 of the present invention. As shown in Figure 8, it specifically includes the following steps:
  • the vital body detection device If the vital body detection device detects that there is no person, the next test will be started. If no person is detected within five minutes, the vital body detection device will enter the sleep mode. After that, it will perform a five-minute test every hour, and after six tests The life body detection equipment completely stops working (to avoid long-term parking consumption). If someone is detected in the car, go to S83;
  • the vehicle interior environment detection module and the GPS module start to work to collect vehicle location GPS information and environmental data, such as vehicle interior temperature, CO2 concentration, and vehicle location GPS information.
  • S84 Send reminder information to preset personnel, and provide environmental data and GPS information.
  • the preset person is a person bound to the vehicle, such as the owner of the vehicle.
  • the owner judges whether he can rush back, whether he needs to turn on the air conditioner or lower the windows according to the environment and location information in the vehicle, and send corresponding control instructions to the vehicle receiving module.
  • S85 Determine whether a control instruction based on the reminder information feedback from the preset personnel is received.
  • the processor may determine whether a control instruction based on the reminder information feedback from the preset person is received after a period of time after sending the reminder information to the preset person, and if a control instruction based on the reminder information feedback from the preset person is received, execute S86 ; Otherwise, execute S88.
  • the processor After the processor has not received the control instruction from the preset personnel based on the reminder information feedback, when it determines that the detected environmental data exceeds the preset value, when the environmental data exceeds the preset value, execute S89; otherwise, it indicates the current environment in the vehicle If it does not cause discomfort to the living body, execute S83 to continue the detection of environmental data in the vehicle.
  • S89 Send an alarm signal or control a vehicle component to perform a preset action.
  • controlling vehicle components to perform preset actions includes alarming an alarm platform, flashing lights, honking a horn, and turning on an in-vehicle air conditioning system.
  • the storage medium may be a magnetic disk, an optical disc, a read-only memory (Read-Only Memory, ROM), a random access memory (RAM), a flash memory (Flash Memory), a hard disk (Hard Disk Drive, abbreviation: HDD) or solid-state drive (Solid-State Drive, SSD), etc.; the storage medium may also include a combination of the foregoing types of memories.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Remote Sensing (AREA)
  • Radar, Positioning & Navigation (AREA)
  • General Physics & Mathematics (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Environmental & Geological Engineering (AREA)
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  • General Life Sciences & Earth Sciences (AREA)
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  • Acoustics & Sound (AREA)
  • Electromagnetism (AREA)
  • Multimedia (AREA)
  • Geophysics And Detection Of Objects (AREA)
  • Measuring Pulse, Heart Rate, Blood Pressure Or Blood Flow (AREA)

Abstract

La présente invention concerne un procédé et un dispositif de détection de corps vivant, et un enregistreur de conduite. Le procédé est appliqué au dispositif de détection de corps vivant. Le dispositif de détection de corps vivant comprend au moins deux émetteurs de signaux et des récepteurs de signaux disposés en correspondance avec les émetteurs de signaux, et l'union de sous-zones couvertes par les signaux émis par les émetteurs de signaux couvre une zone à détecter. Le procédé consiste à : générer et moduler des signaux d'onde de détection pour obtenir au moins deux signaux d'onde de détection modulés (S101); émettre les signaux d'onde de détection modulés (S102); recevoir des signaux d'onde réfléchis correspondant aux signaux d'onde de détection modulés (S103)); décoder et démoduler les signaux d'onde réfléchis pour obtenir des signaux cibles, et détecter si chacun des signaux cibles comprend un signal de signe vital et, quand il y a un signal de signe vital dans le ou les signaux cibles, déterminer qu'il existe un corps vivant dans la zone à détecter (S104). Grâce au procédé, une détection synchrone dans toute la plage de couverture de la zone à détecter peut être réalisée, ce qui permet d'éviter de perdre une détection.
PCT/CN2019/105916 2019-07-09 2019-09-16 Procédé et dispositif de détection de corps vivant, et enregistreur de conduite Ceased WO2021003841A1 (fr)

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CN201910617282.2A CN110333541A (zh) 2019-07-09 2019-07-09 一种生命体检测方法、设备及行车记录仪
CN201910617282.2 2019-07-09

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Cited By (1)

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CN112904438A (zh) * 2021-03-11 2021-06-04 兴科迪科技（泰州）有限公司 一种基于点云的空间扫描生命体检测系统及方法

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