WO2020042444A1 - 人体存在探测器及其人体存在探测方法 - Google Patents

人体存在探测器及其人体存在探测方法 Download PDF

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Publication number
WO2020042444A1
WO2020042444A1 PCT/CN2018/121475 CN2018121475W WO2020042444A1 WO 2020042444 A1 WO2020042444 A1 WO 2020042444A1 CN 2018121475 W CN2018121475 W CN 2018121475W WO 2020042444 A1 WO2020042444 A1 WO 2020042444A1
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Prior art keywords
detection
signal
microwave
human
human body
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PCT/CN2018/121475
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English (en)
French (fr)
Chinese (zh)
Inventor
邹高迪
邹明志
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Shenzhen Merrytek Technology Co Ltd
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Shenzhen Merrytek Technology Co Ltd
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Priority to CN201880002488.8A priority Critical patent/CN110088643B/zh
Priority to EP19194472.7A priority patent/EP3617741A1/en
Publication of WO2020042444A1 publication Critical patent/WO2020042444A1/zh
Anticipated expiration legal-status Critical
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    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
    • G06V40/00—Recognition of biometric, human-related or animal-related patterns in image or video data
    • G06V40/10—Human or animal bodies, e.g. vehicle occupants or pedestrians; Body parts, e.g. hands
    • G06V40/103—Static body considered as a whole, e.g. static pedestrian or occupant recognition
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/02—Detecting, measuring or recording for evaluating the cardiovascular system, e.g. pulse, heart rate, blood pressure or blood flow
    • A61B5/024—Measuring pulse rate or heart rate
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/05—Detecting, measuring or recording for diagnosis by means of electric currents or magnetic fields; Measuring using microwaves or radio waves
    • A61B5/0507—Detecting, measuring or recording for diagnosis by means of electric currents or magnetic fields; Measuring using microwaves or radio waves using microwaves or terahertz waves
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/103—Measuring devices for testing the shape, pattern, colour, size or movement of the body or parts thereof, for diagnostic purposes
    • A61B5/11—Measuring movement of the entire body or parts thereof, e.g. head or hand tremor or mobility of a limb
    • A61B5/1102—Ballistocardiography
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/103—Measuring devices for testing the shape, pattern, colour, size or movement of the body or parts thereof, for diagnostic purposes
    • A61B5/11—Measuring movement of the entire body or parts thereof, e.g. head or hand tremor or mobility of a limb
    • A61B5/1113—Local tracking of patients, e.g. in a hospital or private home
    • A61B5/1114—Tracking parts of the body
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/103—Measuring devices for testing the shape, pattern, colour, size or movement of the body or parts thereof, for diagnostic purposes
    • A61B5/11—Measuring movement of the entire body or parts thereof, e.g. head or hand tremor or mobility of a limb
    • A61B5/113—Measuring movement of the entire body or parts thereof, e.g. head or hand tremor or mobility of a limb occurring during breathing
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/103—Measuring devices for testing the shape, pattern, colour, size or movement of the body or parts thereof, for diagnostic purposes
    • A61B5/11—Measuring movement of the entire body or parts thereof, e.g. head or hand tremor or mobility of a limb
    • A61B5/113—Measuring movement of the entire body or parts thereof, e.g. head or hand tremor or mobility of a limb occurring during breathing
    • A61B5/1135—Measuring movement of the entire body or parts thereof, e.g. head or hand tremor or mobility of a limb occurring during breathing by monitoring thoracic expansion
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/72—Signal processing specially adapted for physiological signals or for diagnostic purposes
    • A61B5/7225—Details of analogue processing, e.g. isolation amplifier, gain or sensitivity adjustment, filtering, baseline or drift compensation
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J5/00—Radiation pyrometry, e.g. infrared or optical thermometry
    • G01J5/0022—Radiation pyrometry, e.g. infrared or optical thermometry for sensing the radiation of moving bodies
    • G01J5/0025—Living bodies
    • 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
    • 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
    • G01S13/52—Discriminating between fixed and moving objects or between objects moving at different speeds
    • G01S13/56—Discriminating between fixed and moving objects or between objects moving at different speeds for presence detection
    • 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
    • G01S13/58—Velocity or trajectory determination systems; Sense-of-movement determination systems
    • G01S13/581—Velocity or trajectory determination systems; Sense-of-movement determination systems using transmission of interrupted pulse modulated waves and based upon the Doppler effect resulting from movement of targets
    • 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
    • G01S7/41—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00 using analysis of echo signal for target characterisation; Target signature; Target cross-section
    • G01S7/415—Identification of targets based on measurements of movement associated with the target
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B2562/00—Details of sensors; Constructional details of sensor housings or probes; Accessories for sensors
    • A61B2562/02—Details of sensors specially adapted for in-vivo measurements
    • A61B2562/0228—Microwave sensors
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/02—Detecting, measuring or recording for evaluating the cardiovascular system, e.g. pulse, heart rate, blood pressure or blood flow
    • A61B5/0205—Simultaneously evaluating both cardiovascular conditions and different types of body conditions, e.g. heart and respiratory condition
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2120/00—Control inputs relating to users or occupants
    • F24F2120/10—Occupancy

Definitions

  • the invention relates to the field of sensing and detection, in particular to a human presence detector and a detection method for detecting whether a human body exists in a detection space by using a microwave Doppler effect principle.
  • Video-based image recognition technology mainly uses image processing techniques, such as image processing methods such as frame difference method, background subtraction method, or optical flow method.
  • image processing methods such as frame difference method, background subtraction method, or optical flow method.
  • the human body is recognized in the video image using the color and contour of the human body, and the movement of the recognized human body is detected .
  • Visible light-based video recognition technology is widely used in photographing, autonomous driving, robotics, medicine, and security.
  • video recognition technology based on visible light has great limitations.
  • the recognition technology based on video images is greatly affected by light. When the ambient light intensity is insufficient, it is difficult to realize human body recognition and detection.
  • the influence or interference of natural light on the imaging also needs to be considered.
  • visible light-based video recognition technology is difficult to implement fine motion detection and monitoring of the recognized human body.
  • video recognition technology cannot detect and monitor dynamic physiological signals such as human breathing and heartbeat.
  • infrared imaging and detection technology has good penetrability, strong anti-interference ability and strong camouflage target recognition ability.
  • thermal infrared-based infrared imaging and detection technology also cannot implement small movements on the identified human body, such as the detection and monitoring of dynamic physiological signals such as human breathing and heartbeat.
  • living organisms all generate infrared radiation
  • infrared imaging and detection technology based on thermal infrared also needs to consider the interference of other organisms.
  • heat sources generated by various man-made equipment may also affect or cause interference with the detection results.
  • the current detection technology for human presence is mainly based on the recognition of human movement and / or image data, and is easily interfered by various environmental factors to affect the detection result.
  • One of the main advantages of the present invention is to provide a human presence detector and a human presence detection method, which can directly obtain data for human presence, reduce the complicated steps required for subsequent analysis, and improve the efficiency of using human presence data.
  • Another advantage of the present invention is to provide a human presence detector and a method for detecting human presence, which exclude the data of human (live) body being excluded, and sense it for a real user or an experience party.
  • Another advantage of the present invention is to provide a human presence detector and a human presence detection method, which can obtain data on the existence of a human (living) body between objects without complicated processing, thereby obtaining a judgment of the human body or the living body.
  • Another advantage of the present invention is to provide a human presence detector and a human presence detection method, wherein the human presence detector of the present invention can detect whether a human (living) body exists in a detection space.
  • Another advantage of the present invention is to provide a human presence detector and a human presence detection method, wherein the human presence detector of the present invention uses the principle of microwave Doppler effect to judge in response to human movement and / or micro-motion. The existence of a human (living) body.
  • Another advantage of the present invention is to provide a human presence detector and a human presence detection method, wherein the human presence detector of the present invention includes a microwave generator and a microwave receiver, so that Detecting a space-borne detection microwave and receiving a corresponding echo of the detection microwave by the microwave receiver, wherein when there is a phase difference between the detection microwave emitted by the microwave generator and the corresponding echo received by the microwave receiver, The human presence detector determines the presence of a human (living) body.
  • Another advantage of the present invention is to provide a human presence detector and a human presence detection method, wherein the human presence detector of the present invention further includes a mixing detector, wherein the mixing detector is configured to be capable of detecting the microwave.
  • the detection microwave sent by the generator and the corresponding echo received by the microwave receiver are mixed and detected to output a corresponding primary detection signal.
  • the primary detection signal is a response to the action of the corresponding detection space.
  • the human presence detector determines that a human (living) body exists.
  • the human presence detector of the present invention further includes a signal processor, wherein the signal processor is configured to detect the mixed frequency.
  • the primary detection signal output from the monitor is selected and amplified to select the fluctuation signal of a specific frequency range in the primary detection signal to amplify and output a secondary detection signal, then the human presence detector operates on an operation frequency in the specific frequency range
  • the response is amplified to judge the existence of a human (living) body in response to actions in the specific frequency range.
  • Another advantage of the present invention is to provide a human presence detector and a human presence detection method, wherein the signal processor is configured to be able to select a fluctuation signal with a frequency within 3 Hz in the primary detection signal for amplification output, then the Fluctuation signals above 3 Hz in the secondary detection signal are filtered out, so that the secondary detection signal only responds to actions with an action frequency within 3 Hz (three times per second) in the detection space, and can avoid the action frequency in the detection space being Interference of motion above 3Hz (three times per second).
  • Another advantage of the present invention is to provide a human presence detector and a human presence detection method thereof, wherein the human presence detector of the present invention is configured to judge by a response to an action within a motion frequency of 3 Hz (three times per second).
  • the human presence detector of the present invention can reduce the interference of environmental actions in the detected environment, and therefore the detection result more precise.
  • Another advantage of the present invention is to provide a human presence detector and a human presence detection method, wherein the signal processor is configured to be able to select a fluctuation signal with a frequency in the primary detection signal within 3 Hz and output the amplified signal, When the electromagnetic interference signal in the natural environment is concentrated above 3 Hz, the signal processor is not easily interfered by the electromagnetic interference signal in the natural environment, so the output of the secondary detection signal is more stable.
  • Another advantage of the present invention is to provide a human presence detector and a human presence detection method, wherein the human presence detector of the present invention detects human (living) body characteristics and operates within 3 Hz (three times per second). The response of the human breathing action and / or heartbeat action determines the existence of a human (living) body, so as to reduce the interference of the environmental action on the detection result.
  • Another advantage of the present invention is to provide a human presence detector and a human presence detection method thereof, wherein the human presence detector of the present invention is based on the principle of the microwave Doppler effect and responds to the human breathing action and / or heartbeat action in real time to The response to the human breathing action and / or heartbeat action monitors the presence of a human (living) body while judging the breathing and / or heartbeat state of the detected human body.
  • Another advantage of the present invention is to provide a human presence detector and a human presence detection method, in which the detection is based on the difference in the amplitude interval and frequency interval of the fluctuation signal corresponding to different human (live) breathing and heartbeat actions.
  • the fluctuation signals corresponding to the breathing and heartbeat of different human (living) bodies in the space can be separated, so that the detection space simultaneously monitors the breathing and / or heartbeat actions of multiple detected human bodies while acquiring the number of detected human bodies.
  • Another advantage of the present invention is to provide a human presence detector and a human presence detection method thereof, wherein the secondary detection signal of the same person in the secondary detection signal is different according to the amplitude interval and frequency interval of the fluctuation signal corresponding to the action of breathing and heartbeat.
  • the fluctuation signals corresponding to the breathing and the heartbeat can be separated, so that the human presence detector can monitor the breathing and heartbeat states of the human body respectively according to the amplitude and frequency of the separated fluctuation signals.
  • Another advantage of the present invention is to provide a human presence detector and a human presence detection method thereof, wherein the human presence detector of the present invention can detect or monitor the breathing and / or heartbeat of the human body in real time, and in particular, the human presence detection The device can monitor the breathing movement of the detected human body in real time to judge the health status of the detected person (or human body).
  • Another advantage of the present invention is to provide a human presence detector and a human presence detection method thereof, in which the secondary detection signal can be processed with a delay so as to have a periodic wave signal corresponding to the action of human breathing and heartbeat.
  • This feature eliminates the interference of occasional movements with an operating frequency within 3 Hz on the waveform of the secondary detection signal, thereby improving the reliability of the human presence detector's detection of the human breathing and / or heartbeat state.
  • Another advantage of the present invention is to provide a human presence detector and a human presence detection method, wherein the human presence detection method of the present invention can detect whether a human body exists in a detection space.
  • Another advantage of the present invention is to provide a human presence detector and a human presence detection method, wherein the human presence detection method of the present invention uses a microwave Doppler effect principle to judge a person in response to human movement and / or micro-motion. (Living) body.
  • Another advantage of the present invention is to provide a human presence detector and a human presence detection method in which a detection microwave is propagated in a detection space and a corresponding echo of the detection microwave is received, wherein when the detection microwave is emitted and the received When there is a phase difference between the corresponding echoes, it is determined that a human (living) body exists.
  • Another advantage of the present invention is to provide a human presence detector and a method for detecting human presence, wherein by performing mixed frequency detection on the detected microwaves emitted and corresponding echoes received, and outputting corresponding primary detection signals, the primary The detection signal is a response to the action of the corresponding detection space.
  • the primary detection signal has a fluctuation signal with a set amplitude, it is determined that a human (living) body exists.
  • Another advantage of the present invention is to provide a human presence detector and a human presence detection method, in which a primary detection signal output is selected and amplified to select a fluctuation signal in a specific frequency range in the primary detection signal for amplification.
  • the secondary detection signal is output, the response to the action in the specific frequency range is amplified to determine the existence of a human (living) body in response to the action in the specific frequency range.
  • Another advantage of the present invention is to provide a human presence detector and a human presence detection method, in which the existence of a human (living) body is judged by a response to an action with an action frequency of 3 Hz (three times per second).
  • the frequency of environmental actions in the environment is concentrated at 3 Hz (three times per second), the human presence detection method of the present invention can reduce the interference of environmental actions in the detection environment, and therefore the detection result is more accurate.
  • Another advantage of the present invention is to provide a human presence detector and a human presence detection method thereof, in which the presence of a human (living) body is judged by a response to an action with an action frequency of 3 Hz (three times per second). Respiration and / or heartbeat have human (living) characteristics and are below 3 Hz (three times per second), then the human presence detection method of the present invention can reduce the interference of environmental actions in the detection environment and can respond to human breathing actions And / or heartbeat to detect the presence of a human body in a detection space.
  • Another advantage of the present invention is to provide a human presence detector and a human presence detection method, wherein the human presence detection method of the present invention is based on the principle of the microwave Doppler effect to respond to the human breathing action and / or heartbeat action in real time to The response to the human breathing action and / or heartbeat action monitors the presence of a human (living) body, and judges the breathing and / or heartbeat status of the detected human body.
  • Another advantage of the present invention is to provide a human presence detector and a human presence detection method, wherein the human presence detection method of the present invention can detect or monitor the breathing and / or heartbeat of the human body in real time to determine the detected person (or (Human body) breathing and / or heartbeat conditions, and an alarm can be issued when there is an abnormal breathing and / or heartbeat frequency of a human (living) body in the detected space.
  • Another advantage of the present invention is to provide a human presence detector and a human presence detection method, in which the data of the human body's breathing and / or heartbeat movement detected or monitored in real time can be used by other electrical appliances to intelligently provide services .
  • a human presence detector of the present invention capable of achieving the foregoing objects and other objects and advantages includes:
  • a microwave generator wherein the microwave generator is arranged to emit a detection microwave propagating in a detection space;
  • a microwave receiver wherein the microwave receiver is configured to receive a corresponding echo of the detection microwave
  • a mixing detector wherein the mixing detector is connected to the microwave generator and the microwave receiver, and is configured to perform detection of the microwave emitted by the microwave generator and a corresponding echo received by the microwave receiver. Mixing detection to output a corresponding primary detection signal, the primary detection signal is a response signal to the action of the corresponding detection space;
  • a signal processor wherein the signal processor is connected to the mixer detector and is configured to select and amplify the primary detection signal output by the mixer detector to select a specific frequency in the primary detection signal.
  • the fluctuation signal in the range is amplified and the secondary detection signal is output.
  • the response signal of the human presence detector to the action with the action frequency in the specific frequency range is amplified, so that the human (living) body can be judged in response to the action in the specific frequency range. The presence.
  • the signal processor is configured to be able to select a ripple signal with a frequency within 3 Hz in the primary detection signal to amplify and output, and filter out a ripple signal above 3 Hz to output a signal with a frequency less than If the secondary detection signal is equal to 3 Hz, the secondary detection signal is a signal that only responds to motions whose motion frequency is within 3 Hz, thereby avoiding interference with environmental motions whose motion frequency is greater than 3 Hz in the detection space.
  • the microwave generator and the microwave receiver are configured as a microwave sensor, so that the microwave sensor sends out the detection microwave and receives a corresponding echo.
  • the signal processor is integrated into the microwave sensor.
  • the present invention further provides a human presence detector, which includes:
  • a microwave sensor wherein the microwave sensor is configured to be capable of emitting a detection microwave propagating in a detection space, and receiving a corresponding echo of the detection microwave, and performing mixed frequency detection on the emitted detection microwave and the corresponding echo received, To output the corresponding primary detection signal;
  • a signal processor wherein the signal processor is connected to the microwave sensor, and is configured to select and amplify the primary detection signal output by the microwave sensor to select a fluctuation signal in a specific frequency range in the primary detection signal. Amplify and output a secondary detection signal, then the human presence detector ’s response signal to an operation whose operation frequency is in the specific frequency range is amplified, that is, the secondary detection signal is only in response to an operation whose operation frequency is in the specific frequency range. Signal, so that the presence of a human (living) body can be determined in response to an action in the specific frequency range.
  • the present invention further provides a human presence detection method, which includes the following steps:
  • the secondary detection signal is a signal that only responds to an operation whose operation frequency is within 3 Hz.
  • the method further comprises the steps:
  • the method further comprises the steps:
  • the present invention further provides a human presence detector, including:
  • a microwave sensor and a signal processor wherein the microwave emitted by the microwave sensor is reflected by the human body and analyzed by the signal processor, and according to the difference between the emitted microwave and the reflected microwave, the signal processor analyzes the The reflected microwaves can then detect the presence of the human body.
  • the microwave sensor includes at least one microwave generator, at least one microwave receiver, and a mixing detector, wherein the microwave generator is configured to emit or transmit detection microwaves that are transmitted in a detection space.
  • the microwave receiver is configured to receive a corresponding echo of the detection microwave, wherein the frequency mixing detector is connected to the microwave generator and the microwave receiver, and is configured to be capable of detecting the microwave.
  • the detection microwave sent by the generator and the corresponding echo received by the microwave receiver are mixed and detected to output corresponding detection data.
  • the microwave sensor includes a power supply module and a detection module, wherein the power supply module supplies external energy to the microwave sensor and the signal processor in the human presence detector, The detection module obtains detection data of the reflected microwave.
  • the signal processor further includes a central control unit and a signal processing module, wherein the signal processing module receives the detection data of the detection module and processes it into a detection result that can be judged, wherein The central control unit presets a program for obtaining detection results and processing detection data.
  • the detection module is a microwave Doppler detection module.
  • the signal processing module includes at least one signal amplification module and at least one filter.
  • the signal processing module includes at least a DC amplification module and at least one filter.
  • the signal processing module includes at least one AC amplifier module and at least one filter.
  • the signal processing module includes at least one analog filter and at least one digital filter.
  • the signal processing module includes at least one signal amplification module and at least one analog filter.
  • the signal processing module includes at least one signal amplification module and at least one digital filter.
  • the central control unit includes a signal sampling module, a digital filter module, a program center, and at least one input / output interface, wherein different target needs set in advance in the program center
  • the signal sampling module and the digital filter module process the detection data to obtain a detection result, wherein a judgment basis set in advance by the program center, and the input and output interface perform the detection result.
  • FIG. 1 is a schematic structural diagram of a human presence detector according to a preferred embodiment of the present invention.
  • FIG. 2 is a schematic diagram of detecting whether a human body exists in a detection space according to a preferred embodiment of the present invention.
  • FIG. 3 is a schematic structural diagram of an optional implementation of a human presence detector according to a preferred embodiment of the present invention.
  • FIG. 4 is a detection schematic diagram of detecting whether a human body exists in a detection space according to the optional implementation of the human presence detector according to a preferred embodiment of the present invention.
  • FIG. 5 is a schematic block diagram of a circuit of a human presence detector according to another preferred embodiment of the present invention.
  • FIG. 6 is a schematic flowchart of a human presence detector according to a preferred embodiment of the present invention.
  • FIG. 7 is a schematic circuit diagram of a signal processor of a human presence detector according to a preferred embodiment of the present invention.
  • FIG. 8 is a waveform diagram of detection and processing data of a human presence detector according to a preferred embodiment of the present invention.
  • FIG. 9 is a schematic diagram of using a human presence detector according to a preferred embodiment of the present invention.
  • Fig. 10 is a schematic diagram of another use of a human presence detector according to a preferred embodiment of the present invention.
  • FIG. 11 is a flowchart of a human body presence detection method according to a preferred embodiment of the present invention.
  • the human presence detector of the present invention includes at least one microwave generator 10, at least one microwave receiver 20, and a mixed frequency detection.
  • a microwave generator 10 and a signal processor 40 wherein the microwave generator 10 is configured to emit or transmit a detection microwave propagating in a detection space, and the microwave receiver 20 is configured to receive a corresponding echo of the detection microwave, wherein the mixing frequency
  • the detector 30 is connected to the microwave generator 10 and the microwave receiver 20, and is configured to be capable of performing mixed frequency detection on the detection microwave emitted by the microwave generator 10 and the corresponding echo received by the microwave receiver 20 to If a corresponding primary detection signal is output, the primary detection signal is a response signal to the action of the corresponding detection space.
  • the signal processor 40 is connected to the mixing detector 30 and is configured to be able to perform the mixing operation.
  • the primary detection signal output from the detector 30 is subjected to selection and amplification processing to select a fluctuation signal in a specific frequency range in the primary detection signal for amplification and
  • the secondary detection signal is output, the response signal of the human presence detector to the action in the specific frequency range is amplified, that is, the secondary detection signal is a signal that only responds to the action with the operation frequency in the specific frequency range, so that it can respond to the The presence of a human (living) body is judged operatively in the frequency range.
  • the specific frequency is not greater than 50 Hz.
  • the frequency of the secondary detection signal is not greater than 3 Hz.
  • the selection and amplification processing of the primary detection signal by the signal processor 40 can be implemented by selecting and amplifying the circuit, or by using a specific software program for the primary detection signal. It is realized by data processing, and can also be combined by two ways, that is, within the basic scope of the existing signal selection and amplification circuits and methods, the structure and signal selection of the signal processor 40 itself according to the present invention and There are no restrictions on the zoom method.
  • the signal processor 40 may be further configured to be capable of performing multi-level selection and / or amplification processing on the received primary detection signal to select
  • the primary detection signal is amplified by a fluctuation signal in a specific frequency range to output the secondary detection signal, that is, the number of the signal processors 40 may be multiple, or the signal processors 40 are set to be provided by a plurality of signal processors and
  • the present invention is not limited to the component composition of the amplification function.
  • the signal processor 40 of the human presence detector when the signal processor 40 of the human presence detector according to the preferred embodiment of the present invention is set to be able to select a primary signal to be fluctuated within a frequency of 3 Hz, the secondary signal is amplified. Fluctuation signals with a frequency above 3 Hz in the detection signal are filtered to select a fluctuation signal with a frequency less than or equal to 3 Hz in the primary detection signal to amplify and output the secondary detection signal, and the secondary detection signal only responds to the operating frequency at Signals of movements within 3 Hz (three times per second).
  • the movements detected by the human presence detector of the present invention are, to a great extent, physical movements caused by breathing and / or heartbeat of the human body (human living body).
  • the human presence detector of the present invention may also detect body movements that are triggered in response to the human heartbeat (generally no more than 3 times per second).
  • the secondary detection signal having a fluctuation signal within a frequency of 3 Hz is output.
  • the regular fluctuation signal within 3 Hz in the secondary detection signal output by the signal processor 40 of the human body presence detector of the present invention corresponds to a physical action caused by a human (living) body's breathing and heartbeat.
  • the human presence detector of the present invention mainly uses the characteristics of human dynamic physiological signals, such as human breathing frequency or heart rate, to detect whether a human body exists in a spatial range, and even monitors the detected human breathing through continuous detection. And / or whether the heartbeat is normal.
  • the respiration frequency of the human body detected by the human presence detector of the present invention is less than 12 times per minute (adult), or greater than 24 times per minute (adult)
  • the human presence detector of the present invention can issue a warning signal to remind the use Or even a doctor, the human body being detected or monitored may be in an abnormal physiological state.
  • the human presence detector of the present invention can be used to monitor whether a dynamic physiological signal of the human body is normal.
  • the human body presence detector of the present invention detects the presence of a human (living body), when the detected human body experiences breathing or cardiac arrest, the human body presence detector of the present invention can also issue a warning signal.
  • microwaves have the advantages of being less affected by dust, smoke and steam, low air propagation loss, easy reflection, fast propagation speed, high sensor response, and wide sensing range.
  • microwaves also have a Doppler effect.
  • the human presence detector of the present invention uses microwaves to detect the human body, and will have many advantages that human body detection (or detection) based on visible light and human body detection (or detection) based on thermal infrared do not have, such as the detection of small Action, less affected by the environment, and the detection structure is not easy to be interfered.
  • the microwave generator 10 of the human presence detector of the present invention can be set to receive corresponding echoes at the same time when the detection microwave is emitted, that is, a preferred implementation according to the present invention
  • the microwave generator 10 and the microwave receiver 20 of the human body presence detector may be integrated as a microwave sensor, so that the microwave sensor sends out the detection microwave and receives a corresponding echo.
  • the microwave generator 10 of a human presence detector includes a microwave oscillator 11 and a microwave transmitting antenna 12, wherein the microwave oscillator 11 generates a detection microwave signal. (Electrical signal), the microwave transmitting antenna 12 emits a detection microwave corresponding to the detection microwave signal.
  • the microwave receiver 20 includes at least one microwave receiving antenna 21, wherein the microwave receiving antenna 21 is configured to receive a corresponding echo of a detection microwave from the microwave generator 10.
  • the microwave receiving antenna 21 may be configured to receive an echo and convert it into a corresponding echo signal (electrical signal), wherein the frequency mixing detector 30 is communicatively connected to the microwave generator 10 and the microwave receiving The detector 20 performs mixed detection so as to be able to receive the detection microwave signal and the corresponding echo signal, and outputs the primary detection signal.
  • the frequency mixing detector 30 is communicatively connected to the microwave generator 10 and the microwave receiving The detector 20 performs mixed detection so as to be able to receive the detection microwave signal and the corresponding echo signal, and outputs the primary detection signal.
  • microwave refers to electromagnetic waves with a frequency of 300Mhz to 300GHz
  • the structures of the microwave generator 10 and the microwave receiver 20 applicable to microwaves of different frequency bands are not the same.
  • the present invention mainly selects the primary The signal fluctuation in a specific frequency range in the detection signal is amplified to output the secondary detection signal in a specific frequency range, so that the secondary detection signal is only responsive to an action whose operation frequency is in the specific frequency range, thereby being able to detect the specific frequency
  • the presence or absence of a range of action and the frequency of the action determine the existence and state of a human (living) body.
  • the structure of the microwave generator 10 and the microwave receiver 20 shown in the drawings of the description of the present invention is only for illustration. The structures of the microwave generator 10 and the microwave receiver 20 are not limited.
  • the frequency mixing detector 30 performs frequency mixing detection on the detection microwave signal and the corresponding echo signal to output the primary detection signal, and the fluctuation signal of the primary detection signal is The response to the motion of the probe space.
  • the mixer detector 30 is communicatively connected to the signal processor 40.
  • the signal processor 40 can receive the primary detection signal, and select and amplify the primary detection signal to select the primary detection signal.
  • the fluctuation signal in a specific frequency range is amplified to output the secondary detection signal.
  • the signal processor 40 is configured to filter the fluctuation signal whose frequency of the primary detection signal is greater than 3 Hz, the signal processor is set. In order to be able to select a fluctuation signal with a frequency less than or equal to 3 Hz for the primary detection signal for amplification output, the fluctuation signal above 3 Hz in the secondary detection signal is filtered out, that is, the primary detection signal responds to the action of the detection space.
  • Fluctuation signals generated by actions with a frequency greater than 3 Hz (three times per second) are filtered, and the secondary detection signal output by the signal processor 40 is a signal that only responds to actions with an action frequency within 3 Hz (three times per second). And a fluctuation signal generated in response to an operation frequency of the detection space that is less than or equal to 3 Hz (three times per second) is amplified.
  • the response of the human presence detector to a motion in a frequency range of 3 Hz (three times per second) is amplified, in which the motion caused by human breathing and / or heartbeat has human (living) characteristics and the motion frequency Below 3 Hz, when the secondary detection signal has a fluctuation signal with a certain amplitude, the probability of a human (living) body in the detection space is very large.
  • the fluctuation signal of the secondary detection signal corresponds to the action of the human body within 3 Hz (three times per second), and the secondary detection signal has a certain
  • the regular fluctuation signal corresponds to a large probability of body movements induced by human breathing and / or heartbeat, that is, the human presence detector of the present invention can monitor a person in response to human breathing and / or heartbeat movement ( At the same time as the living body exists, the breathing and / or heartbeat state of the detected human body is judged.
  • the human presence detector of the present invention uses the principle of the microwave Doppler effect, and its detection of the detection space is realized by invisible microwaves, which has a small radiation to the human body and is more convenient, especially for use in home environments. Monitoring for breathing and / or heartbeat is important.
  • the human presence detector includes at least one microwave sensor 100 and a signal processor 40,
  • the signal processor 40 is communicably connected to the microwave sensor 100.
  • the microwave sensor 100 is configured to emit a detection microwave propagating in a detection space, and receive a corresponding echo of the detection microwave.
  • the microwave and the corresponding echoes received are mixed and detected to output a corresponding primary detection signal
  • the signal processor 40 is configured to receive the primary detection signal, and select and amplify the primary detection signal to A fluctuation signal in a specific frequency range in the primary detection signal is selected to be amplified to output a corresponding secondary detection signal, wherein the specific frequency range is a frequency range not greater than 3 Hz.
  • the microwave sensor 100 can be set to simultaneously receive the corresponding echoes while outputting the detection microwave, and output the corresponding primary detection.
  • the signal processor 40 can select and amplify the primary detection signal output from the microwave sensor 100. It can be understood that the signal processor 40 is a programmed or computerized signal processor to select and amplify the primary detection signal output from the microwave sensor 100.
  • the signal processor 40 is configured to be integrated with the microwave sensor 100, which is not limited in the present invention.
  • the present invention further provides a human presence detection method, which includes the following steps:
  • the specific frequency range is a frequency range less than or equal to 3 Hz
  • the secondary detection signal is a signal that only responds to actions with an action frequency within 3 Hz, so as to respond to the human body. Breathing and / or heartbeat detect the presence or absence of the human body.
  • step (d) the method further includes the following steps:
  • step (e) it may further include a step:
  • the human presence detector includes at least one microwave sensor 100 and a signal processor 40.
  • the microwave sensor 100 is a sensor that emits microwaves and receives reflections from a target.
  • the microwave sensor 100 in this preferred embodiment preferably emits microwaves in the 24.125G frequency band.
  • the microwave sensor 100 includes at least one microwave generator 10, at least one microwave receiver 20, and a frequency mixing detector 30, wherein the microwave generator 10 is configured to emit or transmit detections that propagate in a detection space. microwave.
  • the microwave receiver 20 is configured to receive corresponding echoes of the detection microwaves
  • the frequency mixing detector 30 is connected to the microwave generator 10 and the microwave receiver 20, and is configured to The detection microwave sent by the microwave generator 10 and the corresponding echo received by the microwave receiver 20 are mixed and detected to output corresponding detection data.
  • the detection data obtained by the frequency mixing detector 30 is data that directly reflects the detection space. In other words, the human body will receive the reflected wave of the detection microwave in space. According to different requirements, the detection data is processed accordingly to obtain different detection results. According to different settings, different control operations are performed according to the detection results.
  • the frequency mixing detector 30 is a so-called primary detection signal
  • the primary detection signal is a response signal to the action of the corresponding detection space.
  • Another signal processor 40 is connected to the mixing detector 30 and is configured to be capable of selecting and amplifying the primary detection signal output from the mixing detector 30 to select the primary detection.
  • the fluctuation signal of a specific frequency range in the signal is amplified and a secondary detection signal is output, then the response signal of the human presence detector to the specific frequency range operation is amplified, that is, the secondary detection signal is only responding to the operation frequency
  • the signal of the action in the specific frequency range can determine the existence of a human (living) body in response to the action in the specific frequency range.
  • the microwave sensor 100 includes a power supply module 110 and a detection module 120.
  • the power supply module 110 supplies external energy to the microwave sensor 100 and the signal processor 40 in the human presence detector.
  • the detection module 120 obtains detection data. That is, in the preferred embodiment, the detection module 120 is equivalent to the microwave receiver 20 and the frequency mixing detector 30 in the above embodiment.
  • the signal processor 40 further processes as required, as in the preferred embodiment, the goal is to find a fluctuation signal of about 3 Hz to correspond to the presence of a human body.
  • the processing manner of the signal processor 40 can be controlledly set. It should be noted that this preferred embodiment is an extraction process for reflected microwaves, that is, received microwaves.
  • the processing object is emitted by the microwave sensor 100. Facing different detection requirements, the detection microwaves emitted by the microwave sensor 100 may be correlated with each other.
  • the signal processor 40 further includes a central control unit 400 and a signal processing module 410.
  • the central control unit 400 is preset to obtain a target detection result and process the detection data.
  • the signal processing module 410 receives the detection data and processes it into a detection result that can be judged, so that the central control unit 400 performs a control operation according to the processed detection result.
  • the human presence detector is connected to an execution module 500 to represent the detection result.
  • the power supply module 110 provides power to the detection module 120, the central control unit 400, and the signal processing module 120.
  • the detection module 120 is preferably a microwave Doppler detection module. Based on the principle of the microwave Doppler effect, a difference signal between a detection microwave and a corresponding echo is generated, and then is delivered to the signal processing module 410 for processing. It should be noted that the signal processing module 410 and the central control unit 400 cooperate with each other to analyze the detection microwave. According to a predetermined setting, the central control unit 400 determines to perform a control operation according to a detection result.
  • the signal processing module 410 is a difference signal, such as a phase difference, a frequency difference, and the like, which is detected based on the principle of the Doppler effect and is used to detect the detection microwave and receive the detection data of the echo.
  • Waveform data based on the difference between the detection data detected by the detection module 120, the signal processing module 410 obtains a human body existing in the detection space according to the data difference analysis.
  • the time characteristic of the detection signal can be used to characterize the change in motion in the detection space.
  • the signal processor 40 performs a controlled execution according to the existence or activity of the detection space. For example, the signal processor 40 obtains an increase in the number of people in the room and controls the light to be brightened. Similar operations are set in the central control unit 400 in advance.
  • the signal processing module 410 may be further configured to be capable of multi-level selection of the received primary detection signal. And / or amplifying processing to select a fluctuation signal of a specific frequency range in the primary detection signal to amplify and output the secondary detection signal, that is, the number of the signal processing module 410 may be multiple, or the signal processing module 410 It is configured to be composed of a plurality of components with signal selection and / or amplification functions, which is not limited in the present invention.
  • the signal processing module 410 includes at least one signal amplification module 4101 and at least one filter 4102 connected to the signal amplification module 4101 to detect the detection module 120 through the signal amplification module 4101.
  • the difference between the detected data (that is, the primary detection signal) is amplified, and the amplified difference signal is selectively filtered by the filter 4102 to output a detection result that can be judged by the central control unit 400.
  • An example A circuit diagram of a signal processing module 410 is shown in FIG. 7.
  • the signal processing module 410 is configured to include a first-stage DC amplification module, a first-stage AC amplification module, and an analog filter.
  • the signal processing module 410 is configured to include a two-stage DC amplifier module, a two-stage AC amplifier module, and an analog filter.
  • the signal amplifying module 4101 is configured to be selected from one and more than one level of DC amplifying modules, and one and more than one level of AC amplifying modules, and combinations thereof.
  • the filter 4102 is set to be selected from one or a combination of an analog filter and a digital filter, wherein the analog filter is selected from a low-pass filter and a high-pass filter composed of one or a combination of LC and RC. Filter, band-pass filter, band-rejection filter, dielectric filter, active filter, and passive filter, and the combination thereof.
  • the digital filter is performed by using a general-purpose computer with formulas and algorithms that require calculations. Program the general-purpose computer to perform digital filtering actions.
  • the digital filter is set to the necessary hardware such as MCU, DSP, and ARM that support the operation of the corresponding algorithm software.
  • the corresponding algorithms include but are not limited to Fourier (FFT / DFT) transformation, Butterworth filter and Kalman filter.
  • Specific signal processing is performed for the acquired detection data. For example, based on actions in the detection space, the detection module 120 obtains detection data of a plurality of fluctuation signals. Depending on the nature of the signal sent, the received probe data has some characteristics. For example, 1000 fluctuation signals occurred within 1 s.
  • the signal amplifying module 4101 can perform a wrap-around process. Schematically, if the 1000 wave peaks are connected to form a new waveform, an amplified waveform is formed.
  • the filter 4102 performs filtering on a signal that is repeatedly amplified multiple times.
  • the invalid signal filtering module excludes interference-like waveforms.
  • the circuit form adopted by the signal processing module 410 in this preferred embodiment is controlled by the central control unit 400.
  • the digital filter is preferably integrated into the central control unit 400, wherein the central control unit 400 further includes a signal sampling module, a program A center and at least one input-output interface. That is, the central control unit 400 processes the detection data according to different target needs to obtain detection results.
  • the judgment center preset by the program center is executed by the input / output interface.
  • the central control unit 400 outputs a control signal to the execution module 500 for control.
  • FIG. 8 A process for processing detection data into a detection result in this preferred embodiment is shown in FIG. 8.
  • the signal processing module 410 obtains detection data, and the data amount of the detection data is very huge.
  • the human presence detector in this preferred embodiment analyzes the detection data according to the needs of human detection.
  • the detection data is first passed through a two-stage DC amplification module, and then passed through a two-stage AC amplification module to perform data amplification screening. Finally, the required data is extracted through an analog filter circuit to obtain a detection result that can be judged. According to a predetermined program design, corresponding control is performed according to the detection result.
  • the analysis of the detection data can also be achieved by at least one of the signal amplification modules 4101 and at least one of the filters 4102, such as a DC amplification module or an AC amplification module, a digital filter or an analog filter.
  • the following description uses FIG. 9 as an example.
  • the microwave sensor 100 of the human presence detector is placed in the detection space, and the reflected microwave is received toward an indoor environment.
  • the detection microwave is also emitted by the microwave sensor 100.
  • the detection microwave is emitted by one or several other devices.
  • the detection module 120 obtains and transmits detection microwave data having a difference.
  • the signal processing module 410 analyzes the microwave data to obtain the detection result of the target required by the central control unit 400.
  • the detection module 120 obtains reflection data of three different human bodies.
  • the signal processing module 410 obtains a detection result on the existence of a human body according to an instruction of the central control module 400.
  • the central control module 400 obtains the result of the presence of three persons, and then adjusts the control signal of the execution module 500. For example, the brightness of the light is adjusted according to the detection result of the number of people, or the angle of the light is adjusted according to the position where the number of people is concentrated.
  • the human presence detector obtains information about the existence of the human body, and then obtains health information of the human body.
  • the microwave sensor 100 of the human presence detector is placed in the detection space of an example intensive care unit ICU, and the reflected microwave is received toward the indoor environment. It should be noted that because of the frequency band characteristics of the microwave, it will not cause interference with electrical appliances or other communication equipment.
  • the detection module 120 of the microwave sensor 100 obtains and transmits detection microwave data with a difference. In this application scenario, the detection module 120 obtains reflection data of a human body and the detection data has data reflecting heartbeats.
  • the signal processing module 410 of the microwave sensor 100 analyzes microwave data to obtain a detection result of a target required by the central control unit 400.
  • the signal processing module 410 obtains a detection result about human presence and human information according to an instruction of the central control module 400. That is to say, compared with the above application, this application further analyzes, according to the detection result of the existence of the human body obtained in the detection space, the central control module 400 obtains human heartbeat data, and then adjusts the control signal of the execution module 500 .
  • the data of the human heartbeat is displayed according to the detection result of the number of people. Based on the microwave data emitted by the human body, it can truly reflect the health status of the human body in real time, without the need for additional human monitoring equipment to intervene.
  • the human body detection method is shown in FIG. 11. It is explained in detail in conjunction with the application as shown in FIG. 10.
  • a detection microwave is first emitted to the detection space.
  • the frequency band for detecting microwaves does not interfere with communication, and normal communication has no effect.
  • the emitted microwave is received.
  • the detection data is obtained, that is, the primary detection signal.
  • the whole or part of the detection data is selected to be amplified and filtered, so that the target detection result is extracted, that is, a secondary detection signal is obtained.
  • some problems characterized in the detection space are obtained.
  • a detection result of the presence of a human body is obtained based on a fluctuation of about 3 Hz. And further analyze the characteristics in the detection results to separate the secondary detection signals. Finally, data on human presence and human breathing and / or heartbeat are obtained.
  • the secondary detection signals correspond to the different people (live) bodies in the detection space.
  • the fluctuation signals of breathing and heartbeat can be separated, so that the detection space simultaneously monitors the breathing and / or heartbeat movements of a plurality of detected human bodies while acquiring the number of detected human bodies.
  • the fluctuation signals corresponding to the breathing and heartbeat of the same person in the secondary detection signal can also be separated, so that the human body is detected.
  • the device can monitor the breathing and heartbeat status of the human body according to the amplitude and frequency of the separated wave signal, respectively.
  • the heart rate of a normal person will not be less than 60 times / minute, and not more than 180 times per minute, that is, 1 Hz or more and less than 3 Hz.
  • the parameters of the filter 4102 of the signal processing module 410 are set so that the filter 4102 can filter out fluctuation signals of 1 Hz and above, the fluctuation signal in the secondary detection signal corresponds to the detected signal.
  • the human presence detector separates the secondary detection signals from the fluctuation signals corresponding to the breathing and heartbeat signals of the human (living) body in the detection space, respectively.
  • the secondary detection signal corresponds to the breathing of different human (living) bodies in the detection space.
  • the fluctuation signals corresponding to the heartbeat can be separated, and the fluctuation signals corresponding to the breathing and the heartbeat of the same person in the secondary detection signal can also be separated.
  • the secondary detection signal can be processed with a time delay so as to have a periodic characteristic according to the fluctuation signal of the person's breathing and heartbeat action, and further separate the corresponding person's (live) breathing in the secondary detection signal. And / or the fluctuation signal of the heartbeat action, thereby eliminating the interference of the occasional action within 3Hz on the waveform of the secondary detection signal, thereby improving the detection of the human breathing and / or heartbeat state by the human presence detector. reliability.

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