WO2023157445A1 - センサ装置、及び、乗員検知装置 - Google Patents

センサ装置、及び、乗員検知装置 Download PDF

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Publication number
WO2023157445A1
WO2023157445A1 PCT/JP2022/046267 JP2022046267W WO2023157445A1 WO 2023157445 A1 WO2023157445 A1 WO 2023157445A1 JP 2022046267 W JP2022046267 W JP 2022046267W WO 2023157445 A1 WO2023157445 A1 WO 2023157445A1
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WO
WIPO (PCT)
Prior art keywords
reflector
area
detection
sensor device
waves
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/JP2022/046267
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English (en)
French (fr)
Japanese (ja)
Inventor
寛之 ▲高▼岡
敦 村井
幸夫 大瀧
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Alps Alpine Co Ltd
Original Assignee
Alps Alpine Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Alps Alpine Co Ltd filed Critical Alps Alpine Co Ltd
Priority to DE112022006645.8T priority Critical patent/DE112022006645T5/de
Priority to JP2024500979A priority patent/JP7683119B2/ja
Publication of WO2023157445A1 publication Critical patent/WO2023157445A1/ja
Priority to US18/778,154 priority patent/US20240377520A1/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
    • G01S13/02—Systems using reflection of radio waves, e.g. primary radar systems; Analogous systems
    • G01S13/04—Systems determining presence of a target
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
    • G01S13/02—Systems using reflection of radio waves, e.g. primary radar systems; Analogous systems
    • G01S13/06—Systems determining position data of a target
    • G01S13/42—Simultaneous measurement of distance and other co-ordinates
    • 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
    • G01S13/87—Combinations of radar systems, e.g. primary radar and secondary radar
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
    • G01S13/88—Radar or analogous systems specially adapted for specific applications
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • 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
    • G01S7/027—Constructional details of housings, e.g. form, type, material or ruggedness
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60N—SEATS SPECIALLY ADAPTED FOR VEHICLES; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDED FOR
    • B60N2210/00—Sensor types, e.g. for passenger detection systems or for controlling seats
    • B60N2210/10—Field detection presence sensors
    • B60N2210/16—Electromagnetic waves
    • B60N2210/20—Radar

Definitions

  • the present disclosure relates to a sensor device and an occupant detection device.
  • occupant state detection systems installed in vehicles with multiple seats including front seats and rear seats.
  • a radio wave sensor attached above one of the plurality of seats, transmitting radio waves as transmission waves, receiving the radio waves reflected by an object as reflected waves, and generating sensor signals; and detecting based on the sensor signals.
  • a signal processing device that determines whether or not the object in the area is a person and outputs a determination result; and a notification unit for outputting an alarm if the signal processing device determines that the object in the detection area is a person when the seat absence detection unit detects the occurrence of the seat absence detection unit.
  • the detection area is an area that includes all of a plurality of rear seats, and the movement and state of people in a specific area such as an individual seat or a part of an individual seat is detected. Not for detection.
  • the object is to provide a sensor device that can detect the movement and state of people in a specific area, and an occupant detection device.
  • a sensor device transmits radio waves as transmission waves, and includes an antenna for receiving reflected waves, a first transmission wave of the transmission waves, and a first reflected wave of the reflection waves.
  • a reflector having a first reflecting portion for reflecting, a first detection region where a direct transmission wave of the transmission wave, which is directly transmitted without being reflected by the reflector, reaches; and the first reflection. and a second detection region reached by the first transmitted wave reflected by the portion.
  • FIG. 2 is a diagram showing a disassembled state of the sensor device 100; It is a figure which expands and shows the part enclosed with the broken line of FIG. 3 is a diagram showing an example of the configuration of radar 130.
  • FIG. 2 is a diagram showing the interior of the vehicle 1;
  • FIG. 2 is a diagram showing the interior of the vehicle 1;
  • FIG. FIG. 2 is a diagram for explaining a detection area when the vehicle 1 is parked;
  • FIG. 2 is a diagram for explaining transmission waves reaching a CPD area 1, a CPD area 2, and an IMS area;
  • FIG. 2 is a diagram for explaining a detection area and a non-detection area when the vehicle 1 is running;
  • FIG. 2 is a diagram illustrating transmitted waves reaching an SBR region and transmitted waves reflected to generate non-detection regions 1 and 2;
  • FIG. 1 is a diagram showing a sensor device 100 according to an embodiment.
  • FIG. 2 is a diagram showing a disassembled state of the sensor device 100.
  • FIG. 3 is an enlarged view of a portion surrounded by a broken line in FIG. 1.
  • the sensor device 100 is mounted on a vehicle, receives a signal as a reflected wave reflected by an occupant (person) or an object inside the vehicle, and determines the distance to the occupant or the object based on the round-trip time from transmission to reception. It is a device that detects distance.
  • the sensor device 100 has a plurality of detection areas and a plurality of non-detection areas in order to detect the occupant.
  • the plurality of detection areas are areas where occupants are detected, and the plurality of non-detection areas are areas where occupants are not detected.
  • the XYZ coordinate system will be defined and explained.
  • the ⁇ Z direction side is referred to as the lower side or the lower side
  • the +Z direction side is referred to as the upper side or the upper side, but this does not represent a universal vertical relationship.
  • viewing from the XY plane is referred to as planar viewing.
  • the Y direction is the traveling direction (front-rear direction) of the vehicle.
  • the sensor device 100 includes a bottom case 110, a substrate 120, a radar 130, a connector 140, a case 150 and a reflector 160.
  • Case 150 is an example of a housing. 1 and 2 show a panel 10 provided on the upper side of the sensor device 100.
  • FIG. The panel 10 is a resin cover that covers the sensor device 100 when the sensor device 100 is installed inside the vehicle.
  • FIG. 3 shows substrate 120, radar 130, case 150, and reflector 160, with case 150 shown transparently.
  • the bottom case 110 is a resin case that covers the lower side of the sensor device 100 .
  • the sensor device 100 is attached to the vehicle body via a bracket or the like attached to the lower side of the bottom case 110 .
  • the board 120 is a wiring board on which the radar 130 is arranged.
  • a radar 130 and a connector 140 are mounted on the upper surface of the substrate 120 .
  • the radar 130 and the connector 140 are connected by wiring on the board 120 .
  • the radar 130 has a substrate 130A, a transmitting antenna 131, and a receiving antenna 132 (see FIG. 3).
  • the transmitting antenna 131 and the receiving antenna 132 are examples of antennas that transmit radio waves as transmission waves and receive reflected waves.
  • the transmitting antenna 131 and the receiving antenna 132 are provided at the center of the upper surface of the substrate 130A. 130 A of board
  • the transmitting antenna 131 transmits radio waves as transmitting waves, and the receiving antenna 132 receives reflected waves reflected by objects or the like. Hereinafter, they may be referred to as a transmitted wave and a received wave of the radar 130, which means that the transmitting antenna 131 transmits the transmitting wave and the receiving antenna 132 receives the reflected wave.
  • the transmitting antenna 131 and the receiving antenna 132 are arranged adjacent to each other in the Y direction.
  • the Y direction is the traveling direction (front-rear direction) of the vehicle.
  • FIG. 3 shows normal n of radar 130 .
  • a normal n passes through the center between the transmitting antenna 131 and the receiving antenna 132 .
  • the front direction of the transmitting antenna 131 and the receiving antenna 132 is the direction along the normal line n toward the +Z direction.
  • the occupant detection device 200 is mounted in a vehicle, for example, and detects the distance to an occupant or an object based on the round trip time from transmission to reception of radio waves. can be used as an example.
  • a circuit configuration of the radar 130 will be described later with reference to FIG.
  • the arrangement of the sensor device 100 including the radar 130 will be described later with reference to FIGS. 5 and 6.
  • FIG. 1 A circuit configuration of the radar 130 will be described later with reference to FIG.
  • the arrangement of the sensor device 100 including the radar 130 will be described later with reference to FIGS. 5 and 6.
  • a connector 140 is provided to connect the radar 130 to an ECU outside the sensor device 100 .
  • the case 150 is a resin housing that covers the upper surface side (first surface side) of the substrate 120 .
  • a reflector 160 is attached to the upper surface of the case 150 .
  • the reflector 160 is made of metal, and has a first reflector 161, a second reflector 162, and a third reflector 163, as shown in FIG.
  • the first reflector 161, the second reflector 162, and the third reflector 163 are examples of the first reflector, the second reflector, and the third reflector, respectively.
  • Reflector 160 is attached to the upper surface of case 150 so as to be positioned near radar 130 in plan view.
  • the first reflecting plate 161 , the second reflecting plate 162 , and the third reflecting plate 163 reflect the transmitted wave of the radar 130 and reflect the reflected wave that is reflected back from an object or the like toward the radar 130 .
  • the first reflector 161 is a plate-shaped member formed by tilting a metal plate substantially parallel to the YZ plane on the upper surface of the case 150 so that its upper end (+Z direction end) approaches the transmitting antenna 131 and the receiving antenna 132 .
  • the second reflector 162 is a plate-like member formed by tilting a metal plate substantially parallel to the ZX plane on the upper surface of the case 150 so as to approach the transmitting antenna 131 and the receiving antenna 132 .
  • the first reflecting plate 161 and the second reflecting plate 162 are plate-like members that are bent adjacent to each other.
  • the third reflector 163 is a part of the -Y direction side of the upper end of the first reflector 161 that is bent so as to approach the transmitting antenna 131 and the receiving antenna 132 .
  • Such a reflector 160 can be easily manufactured by cutting and bending sheet metal or the like.
  • Some of the waves transmitted by the radar 130 reach the object directly without being reflected by the reflector 160, are reflected by the object, and return to the radar 130 as reflected waves.
  • Such radio waves are direct waves.
  • a direct wave of transmission waves transmitted by radar 130 is a direct transmission wave
  • a direct wave of reflection waves received by radar 130 is a direct reception wave.
  • the detection area where the transmitted wave directly reaches and where the passenger is detected is an example of the first detection area.
  • the remaining part of the transmitted wave of radar 130 is reflected by reflector 160 as described above and reaches the object, and the reflected wave reflected by the object is reflected again by reflector 160 and is transmitted to radar 130.
  • the transmitted waves and received waves reflected by the first reflector 161 are an example of the first transmitted waves and the first received waves.
  • the transmitted waves and received waves reflected by the second reflector 162 are examples of the second transmitted waves and second received waves.
  • the transmitted waves and received waves reflected by the reflector 160 are an example of the third transmitted waves and third received waves.
  • the detection area where the first transmission wave reaches and the occupant is detected is an example of the second detection area.
  • the detection area where the second transmission wave reaches and the passenger is detected is an example of the third detection area.
  • a region where the third transmission wave reflected by the third reflector 163 reaches and where the passenger is not detected is an example of a non-detection region.
  • the non-detection area is part of the area other than the first detection area, the second detection area, and the third detection area.
  • the third reflector 163 is a portion obtained by bending a portion of the upper end of the first reflector 161 . It may be a part Also, the third reflector 163 may be a reflector provided on the upper surface of the case 150 instead of a portion obtained by bending the upper end of the first reflector 161 or the second reflector 162 .
  • FIG. 4 is a diagram showing an example of the configuration of the radar 130 and the occupant detection device 200. As shown in FIG. FIG. 4 shows an ECU (electronic control unit) 50 in addition to the occupant detection device 200 . Occupant detection device 200 includes sensor device 100 and detection unit 170 . In FIG. 4, components of the sensor device 100 other than the radar 130 are omitted.
  • the radar 130 has a transmitting antenna 131 , a receiving antenna 132 , a PA (Power Amplifier) 133 , a switch 134 , a signal output section 135 , an LNA (Low Noise Amplifier) 136 and a mixer 137 .
  • a detector 170 is connected to the output side of the mixer 137 .
  • the occupant detection device 200 is provided inside the vehicle, transmits a radar transmission wave (electromagnetic wave) from a transmission antenna 131, and receives a signal as a reflected wave reflected by an occupant or an object inside the vehicle at a reception antenna 132. Then, based on the received signal, the presence or absence of an occupant inside the vehicle is detected. More specifically, the occupant detection device 200 detects the distance to the occupant or the object based on the round-trip time from transmission from the transmitting antenna 131 to reception of the reflected wave. Occupants and objects in the interior of a vehicle are examples of detectable objects.
  • the signal intensity of the reflected wave changes depending on the material of the object, the shape (orientation) of the reflecting surface, etc.
  • the intensity of the reflected wave changes as the object moves. Since it is the passenger who moves in the interior of the vehicle, the passenger can be detected.
  • the transmission antenna 131 is connected to the signal output section 135 via the PA 133 and the switch 134, and transmits the transmission wave that is output from the signal output section 135, passed through the switch 134, and amplified by the PA 133 into the interior of the vehicle.
  • the receiving antenna 132 is connected to the LNA 136 , receives signals as reflected waves output from the transmitting antenna 131 and reflected by passengers and objects inside the vehicle, and outputs the signals to the LNA 136 .
  • the PA 133 is provided between the switch 134 and the transmission antenna 131 , amplifies the transmission wave output from the signal output section 135 and input via the switch 134 , and outputs the amplified transmission wave to the transmission antenna 131 .
  • the LNA 136 is provided between the receiving antenna 132 and the mixer 137 , amplifies the signal received by the receiving antenna 132 in a low noise state, and outputs the amplified signal to the mixer 137 .
  • the switch 134 is provided between the signal output section 135 and the PA 133 , is turned on at a predetermined sampling period by being controlled by the detection section 170 , and outputs the transmission wave to the PA 133 .
  • a predetermined sampling frequency is 20 Hz as an example.
  • the signal output unit 135 outputs transmission waves used to detect passengers and objects inside the vehicle.
  • the signal output section 135 has two output terminals, which are connected to the switch 134 and the mixer 137, respectively.
  • the mixer 137 is connected to the output terminal of the LNA 136, the output terminal of the signal output section 135, and the input terminal of the detection section 170.
  • the mixer 137 mixes (down-converts) the signal input from the LNA 136 with a signal of the same frequency as the transmission wave input from the signal output unit 135, and converts it into a received signal representing the reflection level of the reflected wave, which is input to the detection unit 170. output to the terminal. Note that the reflection level becomes the noise floor when there is no reflection.
  • one detection is performed by turning on the switch 134 once, the detection is performed at the sampling period when the switch 134 is turned on.
  • transmission waves are transmitted from the transmitting antenna 131 and the receiving antenna 132 toward the seating surface of the seat arranged in the vehicle interior to determine whether or not there is an occupant in the seat.
  • One detection is defined as a space between the transmitting antenna 131 and the receiving antenna 132 and the seating surface of the seat arranged in the vehicle interior in the direction connecting the transmitting antenna 131 and the receiving antenna 132 and the seating surface of the seat. It refers to determining whether or not there is a passenger.
  • the detection unit 170 is implemented by a computer including a CPU (Central Processing Unit), RAM (Random Access Memory), ROM (Read Only Memory), an input/output interface, an internal bus, and the like.
  • CPU Central Processing Unit
  • RAM Random Access Memory
  • ROM Read Only Memory
  • the detection unit 170 sets a threshold for determining the presence or absence of an occupant, compares the intensity of the received signal with the threshold, and detects an occupant according to the comparison result. Since the round-trip time to a passenger or an object is different, it is possible to determine the presence or absence of a passenger.
  • the ECU 50 is one of vehicle control devices and is connected to the detection unit 170 .
  • the detection unit 170 notifies the ECU 50 of the determination result.
  • FIG. 5 is a diagram showing the interior of the vehicle 1. As shown in FIG. FIG. 5 shows a right front seat 5FR, a left front seat 5FL, a right rear seat 5RR, a central rear seat 5RC, and a left rear seat 5RL.
  • the sensor device 100 can be placed in the interior of the vehicle 1 above the left rear side window and near the room lamp 2RL on the ceiling.
  • the sensor device 100 may be attached to the ceiling above the right rear side window.
  • the right rear seat 5RR, the center rear seat 5RC, the left rear seat 5RL, and the occupants and objects around them can be detected.
  • the sensor device 100 is arranged inside or near the overhead console 3 on the ceiling above the center of the front seat in the room, and detects the occupants and objects in the right front seat 5FR, the left front seat 5FL, and their surroundings. can be done.
  • FIG. 6 is a diagram showing the interior of the vehicle 1.
  • FIG. FIG. 6 shows a right rear seat 5RR, a central rear seat 5RC, and a left rear seat 5RL.
  • the sensor device 100 shown in FIG. 6 incorporates three radars 130, and as shown in FIG.
  • the right rear seat 5RR, the center rear seat 5RC, the left rear seat 5RL, and the occupants and objects around them can be detected.
  • the sensor device 100 is installed on the ceiling of the vehicle 1 .
  • FIG. 7A is a diagram for explaining detection areas when the vehicle 1 is parked.
  • FIG. 7A shows CPD (Child Presence Detection) as a detection area of the sensor device 100 (left) arranged near the room lamp 2RL on the ceiling above the left rear side window in the interior of the vehicle 1.
  • detection) area 1 CPD area 2, and IMS (Intruder Monitoring System) area.
  • CPD area 1 is an example of a first detection area.
  • the CPD area 2 and the IMS area are examples of the second sensing area.
  • the CPD area 1, the CPD area 2, and the IMS area are areas where the distance from the sensor device 100 falls within a predetermined range. Since the sensor device 100 detects the distance to an occupant or an object based on the round-trip time of the transmitted wave and the reflected wave, the occupant detection device 200 detects the presence or absence of an occupant or an object in the CPD area 1, the CPD area 2, and the IMS area. to detect.
  • CPD area 1 and CPD area 2 are areas for detecting abandoned object prevention (CPD).
  • CPD abandoned object prevention
  • the CPD area 1 and the CPD area 2 are located in the area where the seating surfaces of the central rear seat 5RC and the left rear seat 5RL exist in plan view, and are several tens of centimeters from the seating surfaces of the central rear seat 5RC and the left rear seat 5RL in the height direction. (about 20 cm to about 50 cm).
  • the range in the height direction of the CPD area 1 and the CPD area 2 is set to several tens of centimeters from the seat surface of the center rear seat 5RC and the left rear seat 5RL. .
  • the right rear seat 5RR may be detected by the right sensor device 100 (right).
  • the IMS area is an area for detecting intruder detection (IMS) for crime prevention. This area is for detecting an intruder or the like who breaks the left rear side window and reaches into the interior of the vehicle to steal, such as breaking into the vehicle when the vehicle 1 is parked.
  • the IMS area is located inside the left rear side window in plan view, and is located in a range of 10 cm to 50 cm from the ceiling corresponding to the height of the side window in the height direction.
  • the right side may be detected by the sensor device 100 on the right side. Sensor device 100 detects an intruder in the same way as a passenger.
  • FIG. 7B is a diagram explaining transmission waves reaching the CPD area 1, the CPD area 2, and the IMS area.
  • a direct wave among the transmitted waves propagates toward the CPD region 1 .
  • the first reflected wave reflected by the first reflector 161 among the transmitted waves propagates toward the CPD area 2 and the IMS area. That is, the CPD region 1 is a region where direct waves reach. Also, the CPD area 2 and the IMS area are areas where the first reflected wave reaches.
  • FIG. 8A is a diagram for explaining detection areas and non-detection areas when the vehicle 1 is traveling.
  • FIG. 8A shows an SBR (seat belt reminder) area, which is an area detected by the sensor device 100 arranged near the room lamp 2RL above the left rear side window in the interior of the vehicle 1, and the sensor device 100. indicates a non-detection region 1 and a non-detection region 2 where detection is not performed.
  • the SBR area is an example of the second detection area.
  • the SBR area is an example of the third detection area.
  • the SBR area is an area where a seat belt reminder is given to the occupant while the vehicle 1 is running, and the SBR area shown in FIG. 8A is an area for the occupant of the left rear seat 5RL.
  • the SBR area of the left rear seat 5RL is set to a height for detecting the presence or absence of the head of the passenger on the left rear seat 5RL in order to detect the presence or absence of the passenger.
  • the SBR area is located in the area where the backrest of the left rear seat 5RL exists in plan view, and is located in the range of 10 cm to 40 cm from the ceiling in the height direction.
  • the SBR area is an area where the distance from the sensor device 100 is within a predetermined range. Since the sensor device 100 detects the distance to an occupant or an object based on the round-trip time of the transmitted wave and the reflected wave, the occupant detection device 200 detects the presence or absence of an occupant or an object in the SBR area.
  • the non-detection area 1 and the non-detection area 2 are areas in which an occupant that should not be detected exists when the left sensor device 100 detects the presence or absence of an occupant in the left rear seat 5RL while the vehicle 1 is running. It is the occupants of the center rear seat 5RC and the left front seat 5FL that need to be distinguished from the occupants of the left rear seat 5RL. Therefore, the non-detection area 1 and the non-detection area 2 are located in the areas where the backrests of the center rear seat 5RC and the left front seat 5FL are present in plan view, and are in the range of 10 cm to 40 cm from the ceiling in the height direction. is a region located in
  • FIG. 8B is a diagram illustrating transmitted waves reaching the SBR region and transmitted waves reflected to generate the non-detection regions 1 and 2.
  • FIG. A second reflected wave of the transmitted wave reflected by the second reflector 162 propagates toward the SBR region. That is, the SBR area is an area where the second reflected wave reaches. Also, part of the second reflected waves reflected by the second reflector 162 among the transmitted waves reaches areas other than the SBR area, CPD area 1, CPD area 2, and IMS area.
  • the non-detection area 2 is located within the area surrounding the SBR area, and is included in areas other than the SBR area, CPD area 1, CPD area 2, and IMS area.
  • the fact that the non-detection region 2 is located within the region surrounding the SBR region means that there is a possibility that a person sitting around the SBR region may be present in the detection of a passenger or an object in the interior of the vehicle 1 .
  • the area surrounding the SBR area includes areas located in the center rear seat 5RC on the right side of the SBR area and in the left front seat 5FL in front of the SBR area.
  • the non-detection area 2 is located in the left front seat 5FL in front of the SBR area. This is because if the area in front of the SBR area is included in the detection area, it cannot be determined whether the person is in the left rear seat 5RL or the left front seat 5FL.
  • the second reflector 162 has a shape that creates a non-detection area 2 on the back side of the second reflector 162 when viewed from the radar 130 and is arranged to create the non-detection area 2 .
  • the third transmission wave reflected by the third reflector 163 among the transmission waves propagates toward the area other than the non-detection area 1 located in the central rear seat 5RC. In this way, a non-detection area 1 is realized where no transmitted wave reaches.
  • the non-detection region 1 is located within the region surrounding the SBR region, and is included in regions other than the SBR region, CPD region 1, CPD region 2, and IMS region. When the non-detection region 1 is positioned within the region surrounding the SBR region, it is a region where there is a possibility that there is a person sitting around a person who may be in the SBR region when detecting an occupant or an object in the interior of the vehicle 1. Say something.
  • the area surrounding the SBR area includes areas located in the center rear seat 5RC on the right side of the SBR area and in the left front seat 5FL in front of the SBR area.
  • the non-detection area 1 is located in the central rear seat 5RC on the right side of the SBR area. This is because if the area to the right of the SBR area is included in the detection area, it is not possible to tell whether the person is in the left rear seat 5RL or the center rear seat 5RC.
  • the third reflector 163 has a shape that creates a non-detection area 1 on the back side of the third reflector 163 when viewed from the radar 130 and is arranged to create the non-detection area 1 .
  • the predetermined non-detection area generated on the back side of the first reflector 161 is not particularly used.
  • the output of the sensor device 100 does not distinguish between the CPD region 1, CPD region 2, and IMS region shown in FIG. 7A and the SBR region shown in FIG. 8B. Therefore, when an occupant is detected in any one of the CPD area 1, CPD area 2, IMS area, and SBR area, the output of the sensor device 100 becomes a signal indicating that the occupant has been detected. 1, CPD region 2, IMS region, and SBR region, the signal indicates that no occupant is detected.
  • non-detection region 1 and non-detection region 2 should not be included in the four detection regions of CPD region 1, CPD region 2, IMS region, and SBR region, and should not be included in the first detection region and the second detection region. and an area included in an area other than the third detection area.
  • the sensor device 100 includes the CPD area 1 where the direct transmission waves that are directly transmitted without being reflected by the reflector 160 of the transmission waves reach and the first area that is reflected by the first reflector 161 . It has a CPD area 2 and an IMS area where one transmission wave reaches. Therefore, it is possible to detect the movement and state of the occupant (person) in specific areas such as the CPD area 1, the CPD area 2, and the IMS area.
  • the sensor device 100 capable of detecting the movement and state of a person in a specific area.
  • the reflector 160 also has a second reflector 162 that reflects the second transmitted wave of the transmitted waves and the second reflected wave of the reflected waves. It further has an SBR region where two transmitted waves arrive. Therefore, it is possible to provide the sensor device 100 and the occupant detection device 200 that can detect the movement and state of people in a larger number of specific areas.
  • the reflector 160 further has a third reflector 163 that reflects the third transmission wave out of the transmission waves and propagates it through regions other than the CPD region 1, the CPD region 2, the IMS region, and the SBR region.
  • a third reflector 163 that reflects the third transmission wave out of the transmission waves and propagates it through regions other than the CPD region 1, the CPD region 2, the IMS region, and the SBR region.
  • the first reflecting plate 161 and the second reflecting plate 162 are plate-shaped members that are bent adjacent to each other, and are inclined with respect to the front direction of the radar 130 so as to approach the radar 130.
  • the third reflecting plate 163 is , and bent portions in which the tip of the first reflector 161 or the second reflector 162 is bent in a direction to approach the radar 130 . Therefore, the reflector 160 can be easily manufactured from sheet metal or the like.
  • the first reflecting plate 161 and the second reflecting plate 162 may be made of separate sheet metal or the like, and the third reflecting plate 163 may also be made of another sheet metal or the like.
  • the first reflecting plate 161, the second reflecting plate 162, and the third reflecting plate 163 are formed separately, and the third reflecting plate 163 is located at the tip of the first reflecting plate 161 or the second reflecting plate 162. It may be a part attached in a direction to approach the radar 130 .
  • the third reflector 163 has a shape that creates a predetermined non-detection area on the back side of the third reflector 163 when viewed from the radar 130, the predetermined non-detection area is reliably formed on the back side of the third reflector 163. can be generated in
  • the third reflector 163 since the third reflector 163 generates a non-detection region within the region surrounding at least one of the CPD region 1, the CPD region 2, the IMS region, and the SBR region, the CPD region 1, the CPD region 2, Passengers and objects can be reliably detected in the IMS area and the SBR area.
  • the second reflector 162 has a shape that generates an SBR area and a predetermined non-detection area on the back side of the second reflector 162 as viewed from the radar 130 .
  • a non-detection area can be reliably generated.
  • the second reflector 162 Since the second reflector 162 generates a non-detection area in the area surrounding at least one of the CPD area 1, the CPD area 2, the IMS area, and the SBR area, the CPD area 1, the CPD area 2, and the IMS area , and occupants and objects in the SBR region can be reliably detected.
  • it further includes a substrate 120 having a first surface on which the radar 130 is arranged, and a case 150 covering the first surface side of the substrate 120. Since the reflector 160 is provided on the case 150, the reflector for the radar 130 is provided. 160 can be reliably positioned, and direct and reflected waves can be generated as designed.
  • the radar 130 is installed on the ceiling of the vehicle 1, it is possible to easily detect passengers and objects in the detection area from above.
  • the occupant detection device 200 since the occupant detection device 200 includes the detection unit 170 that detects people (occupants) and objects in the interior of the vehicle 1 according to the detection result of the sensor device 100 mounted on the vehicle 1, it is possible to detect people in a specific area. It is possible to provide the occupant detection device 200 that can detect the movement and state of the vehicle.

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  • Engineering & Computer Science (AREA)
  • Remote Sensing (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Electromagnetism (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • Geology (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geophysics (AREA)
  • Geophysics And Detection Of Objects (AREA)
  • Radar Systems Or Details Thereof (AREA)
PCT/JP2022/046267 2022-02-15 2022-12-15 センサ装置、及び、乗員検知装置 Ceased WO2023157445A1 (ja)

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DE112022006645.8T DE112022006645T5 (de) 2022-02-15 2022-12-15 Sensorvorrichtung und Detektionsvorrichtung für Insassen
JP2024500979A JP7683119B2 (ja) 2022-02-15 2022-12-15 センサ装置、及び、乗員検知装置
US18/778,154 US20240377520A1 (en) 2022-02-15 2024-07-19 Sensor device and occupant detection device

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Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08136649A (ja) * 1994-11-08 1996-05-31 Yokogawa Denshi Kiki Kk 走査型電波信管
JP2001295547A (ja) * 2000-04-17 2001-10-26 Nabco Ltd ドア用センサ
JP2007232407A (ja) * 2006-02-27 2007-09-13 Toyota Motor Corp 電波ビームの指向性制御装置および電波式車内侵入検知装置
JP2016151519A (ja) * 2015-02-18 2016-08-22 シャープ株式会社 検知装置および移動体
JP2018151326A (ja) * 2017-03-14 2018-09-27 古河電気工業株式会社 レーダ装置
CN209342946U (zh) * 2018-12-29 2019-09-03 清华大学 毫米波/太赫兹波成像设备
JP2020148757A (ja) * 2019-03-11 2020-09-17 パナソニックＩｐマネジメント株式会社 レーダー装置および車両

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP7249573B2 (ja) 2018-12-20 2023-03-31 パナソニックＩｐマネジメント株式会社 乗員状態検知システム
JP2022021547A (ja) 2020-07-22 2022-02-03 株式会社ジェイテクト 伸縮軸

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08136649A (ja) * 1994-11-08 1996-05-31 Yokogawa Denshi Kiki Kk 走査型電波信管
JP2001295547A (ja) * 2000-04-17 2001-10-26 Nabco Ltd ドア用センサ
JP2007232407A (ja) * 2006-02-27 2007-09-13 Toyota Motor Corp 電波ビームの指向性制御装置および電波式車内侵入検知装置
JP2016151519A (ja) * 2015-02-18 2016-08-22 シャープ株式会社 検知装置および移動体
JP2018151326A (ja) * 2017-03-14 2018-09-27 古河電気工業株式会社 レーダ装置
CN209342946U (zh) * 2018-12-29 2019-09-03 清华大学 毫米波/太赫兹波成像设备
JP2020148757A (ja) * 2019-03-11 2020-09-17 パナソニックＩｐマネジメント株式会社 レーダー装置および車両

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JPWO2023157445A1 (https=) 2023-08-24
US20240377520A1 (en) 2024-11-14
DE112022006645T5 (de) 2025-01-23

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