WO2024116256A1 - 乗員検出装置 - Google Patents

乗員検出装置 Download PDF

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Publication number
WO2024116256A1
WO2024116256A1 PCT/JP2022/043836 JP2022043836W WO2024116256A1 WO 2024116256 A1 WO2024116256 A1 WO 2024116256A1 JP 2022043836 W JP2022043836 W JP 2022043836W WO 2024116256 A1 WO2024116256 A1 WO 2024116256A1
Authority
WO
WIPO (PCT)
Prior art keywords
detection device
occupant detection
camera
vehicle
infrared
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/JP2022/043836
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English (en)
French (fr)
Japanese (ja)
Inventor
章仁 大西
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.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric Corp
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 Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP2024561001A priority Critical patent/JPWO2024116256A1/ja
Priority to PCT/JP2022/043836 priority patent/WO2024116256A1/ja
Publication of WO2024116256A1 publication Critical patent/WO2024116256A1/ja
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R11/00—Arrangements for holding or mounting articles, not otherwise provided for
    • B60R11/04—Mounting of cameras operative during drive; Arrangement of controls thereof relative to the vehicle

Definitions

  • This disclosure relates to an occupant detection device.
  • occupant detection devices have been provided that use cameras and various sensors to detect the status of occupants in a vehicle.
  • occupant detection devices for example, a structure that uses both a camera and a radio wave sensor is conceivable.
  • a lighting device is required to illuminate the camera.
  • Patent Document 1 discloses a room lamp structure that integrates a radar module that detects occupants and a lighting module that shines light into the vehicle interior.
  • the number of illuminators when the angle of view of the camera is widened in order to expand the camera's imaging range, the number of illuminators must be increased in accordance with the expanded angle of view in order to obtain appropriate illuminance. Also, in the above passenger detection device, when properly illuminating a subject that is located far away from the camera, the number of illuminators must be increased.
  • the camera and illuminators are provided together as a camera unit.
  • the number of illuminators in the camera unit increases, leading to an increase in the size of the camera unit.
  • the room lamp structure disclosed in Patent Document 1 is an integrated structure that combines a radar module for detecting occupants and a lighting module for shining light into the vehicle interior. This room lamp structure does not combine a radar module with a camera illuminator.
  • the present disclosure has been made to solve the problems described above, and aims to provide an occupant detection device that can ensure appropriate illumination for occupants while preventing the camera unit from becoming too large.
  • the occupant detection device disclosed herein includes a camera unit having a camera that captures an image of the interior of the vehicle cabin and a first illuminator that irradiates light toward the imaging range of the camera, a second illuminator that irradiates light toward the imaging range of the camera, and a radio wave sensor that is integral with the second illuminator and detects occupants in the cabin.
  • FIG. 1 is a side view of a vehicle equipped with an occupant detection device according to a first embodiment.
  • 1 is a plan view of a vehicle equipped with an occupant detection device according to a first embodiment;
  • 2 is a front view of a camera unit in the occupant detection device according to the first embodiment.
  • FIG. 11 is a side view of a vehicle equipped with an occupant detection device according to a second embodiment.
  • FIG. 11 is a plan view of a vehicle equipped with an occupant detection device according to a second embodiment.
  • FIG. FIG. 1 is a side view of a vehicle equipped with a conventional occupant detection device.
  • FIG. 11 is a front view of a camera unit in a conventional occupant detection device.
  • FIG. 11 is a side view of a vehicle equipped with another conventional occupant detection device.
  • FIG. 13 is a front view of a camera unit in another conventional occupant detection device.
  • Embodiment 1 An occupant detection device 10 according to a first embodiment will be described with reference to FIGS. 1 to 3.
  • FIG. 1 An occupant detection device 10 according to a first embodiment will be described with reference to FIGS. 1 to 3.
  • FIG. 1 An occupant detection device 10 according to a first embodiment will be described with reference to FIGS. 1 to 3.
  • FIG. 1 An occupant detection device 10 according to a first embodiment will be described with reference to FIGS. 1 to 3.
  • FIG. 1 is a side view of a vehicle 50 equipped with an occupant detection device 10 according to embodiment 1.
  • FIG. 2 is a plan view of a vehicle 50 equipped with an occupant detection device 10 according to embodiment 1.
  • FIG. 3 is a front view of a camera unit 11 in an occupant detection device 10 according to embodiment 1. Note that FIG. 2 shows a state in which the roof (ceiling 53) has been removed from the vehicle 50.
  • the vehicle 50 shown in FIG. 1 is equipped with a DMS (Driver Monitoring System) or OMS (Occupant Monitoring System) that monitors the status of an occupant P aboard the vehicle 50 using, for example, a camera and various sensors.
  • the vehicle 50 also has an occupant detection device 10 that constitutes the DMS or OMS.
  • the occupant detection device 10 detects an occupant P aboard the vehicle 50, and the DMS or OMS uses the detection results of the occupant detection device 10.
  • the occupant detection device 10 has a camera unit 11, infrared illuminators 12, 13, and a radio wave sensor 14.
  • the occupant detection device 10 expands the imaging range of the camera unit 11 to the entire interior 51 of the vehicle 50, and complements the blind spots of the imaging range of the camera unit 11 with detection by the radio wave sensor 14.
  • the occupant detection device 10 minimizes the number of infrared illuminators 12, 13 by devising an arrangement of the infrared illuminators 12, 13.
  • the infrared illuminator 12 constitutes the first illuminator
  • the infrared illuminator 13 constitutes the second illuminator.
  • the vehicle 50 has, for example, three rows of seats in the passenger compartment 51. Inside the passenger compartment 51, there are a driver's seat 52a and a passenger seat 52b which form the first row of seats, three rear seats 52c which form the second row of seats, and the two rearmost seats 52d which form the third row of seats. A passenger P who is the subject of the photograph can be seated in the driver's seat 52a, the passenger seat 52b, the rear seats 52c, and the rearmost seats 52d. A ceiling 53 is formed above the passenger compartment 51.
  • the camera unit 11 is provided, for example, at the center in the vehicle width direction at the front edge of the ceiling 53.
  • the camera unit 11 may also be provided on the dashboard, the rearview mirror, the overhead console, the A-pillar, etc.
  • the camera unit 11 has one housing 11a, one infrared camera 11b, and one or more infrared illuminators 12.
  • the housing 11a is supported at the center of the vehicle width direction at the front edge of the ceiling 53 via a mounting plate (not shown) or the like.
  • the housing 11a is rectangular when viewed from the front (when viewed from inside the vehicle compartment 51).
  • the infrared camera 11b captures images of the interior of the vehicle compartment 51.
  • This infrared camera 11b is provided on the front side of the housing 11a, approximately in the center in the vehicle width direction. In this case, the infrared camera 11b is fixed so that it faces the rear side of the vehicle body. Note that the front side of the housing 11a is the surface that faces the inside of the vehicle compartment 51. In this way, by capturing images of the interior of the vehicle compartment 51, the infrared camera 11b is able to capture images of the conditions of the occupants P seated in the driver's seat 52a, passenger seat 52b, rear seat 52c, and rearmost seat 52d.
  • the infrared camera 11b has an image sensor 11c and a camera lens 11d.
  • the camera lens 11d is arranged to cover the image sensor 11c from the front.
  • the infrared camera 11b has an imaging range that includes the driver's seat 52a, the passenger seat 52b, the rear seat 52c, and the rearmost seat 52d.
  • the angle of view of the infrared camera 11b is, for example, in the range of 100 degrees to 170 degrees.
  • the infrared illuminators 12 are used to illuminate the infrared camera 11b.
  • the infrared illuminators 12 are provided on the front side of the housing 11a.
  • two infrared illuminators 12 are arranged on each side of the infrared camera 11b in the vehicle width direction.
  • the illumination range 12a produced by the irradiation of these two infrared illuminators 12 is set to include the entire imaging range of the infrared camera 11b.
  • the length of the illumination range 12a of the infrared illuminator 12 in the vehicle's fore-and-aft direction ranges from the driver's seat 52a and passenger seat 52b to the rear seat 52c.
  • the illumination range 12a in the vehicle width direction of the infrared illuminator 12 includes the entire width of the passenger compartment 51.
  • the radio wave sensor 14 detects the state of the occupant P present in the vehicle compartment 51.
  • This radio wave sensor 14 is, for example, a millimeter wave radar.
  • One radio wave sensor 14 and one or more infrared illuminators 13 are fixed together via a fixing member (not shown) or the like. These are fixed together and provided near the camera unit 11 on the ceiling 53.
  • the infrared illuminators 13 and radio wave sensors 14 are disposed, for example, on the rear side of the vehicle body relative to the camera unit 11.
  • the infrared illuminator 13 is used to illuminate the infrared camera 11b.
  • This infrared illuminator 13 and the infrared illuminator 12 provided in the camera unit 11 have the same configuration and function.
  • the infrared illuminators 12, 13 are, for example, LEDs (Light Emitting Diodes) and laser light sources.
  • the infrared illuminators 13 are arranged, for example, one on each side of the radio wave sensor 14 in the vehicle width direction.
  • the illumination range 13a produced by the irradiation of these two infrared illuminators 13 is set to include the entire imaging range or a portion of the imaging range of the infrared camera 11b.
  • FIG. 6 is a side view of a vehicle 50 equipped with a conventional occupant detection device.
  • FIG. 7 is a front view of a camera unit 11A in a conventional occupant detection device.
  • FIG. 8 is a side view of a vehicle 50 equipped with another conventional occupant detection device.
  • FIG. 9 is a front view of a camera unit 11B in another conventional occupant detection device.
  • the conventional occupant detection device shown in FIG. 6 detects only the state of an occupant (driver) P seated in the driver's seat 52a.
  • the conventional occupant detection device includes a camera unit 11A.
  • This camera unit 11A includes a housing 11a, an infrared camera 11b, and two infrared illuminators 12.
  • the angle of view of the infrared camera 11b is set, for example, in the range of 40 degrees to 60 degrees.
  • the irradiation angle of the infrared illuminator 12 is set to approximately the same angle as the above-mentioned angle of view.
  • the irradiation distance of the infrared illuminator 12 is set to a short distance corresponding to the distance from the camera unit 11A to the driver's seat 52a.
  • the camera unit 11A can easily obtain the necessary illuminance for the imaging range 11e of the infrared camera 11b, which includes the driver's seat 52a. For this reason, in the camera unit 11A, it is sufficient that the infrared illuminator 12 is simply provided in close proximity to the infrared camera 11b.
  • the conventional occupant detection device shown in FIG. 8 has an imaging range 11e that is larger than the imaging range 11e of the conventional occupant detection device shown in FIG. 6.
  • the conventional occupant detection device shown in FIG. 8 detects, as subjects, the states of occupants P seated in, for example, the driver's seat 52a, the passenger seat 52b, and the rear seat 52c.
  • the conventional occupant detection device includes a camera unit 11B.
  • This camera unit 11B includes a housing 11a, an infrared camera 11b, and six infrared illuminators 12.
  • the number of infrared illuminators 12 needs to be increased as the imaging range 11e of the infrared camera 11b expands. This makes the size of camera unit 11B larger than the size of camera unit 11A. As a result, the conventional occupant detection device shown in FIG. 8 results in an increase in the size of camera unit 11B.
  • the occupant detection device 10 when the number of infrared illuminators 12 is increased in order to expand the imaging range 11e of the infrared camera 11b, the occupant detection device 10 disperses the infrared illuminators 12, 13 between the camera unit 11 and the radio wave sensor 14. As a result, the occupant detection device 10 can make the size of the camera unit 11 smaller than the size of the camera unit 11B.
  • the occupant detection device 10 includes a camera unit 11 having an infrared camera 11b that captures an image of the interior of the vehicle cabin 51 of the vehicle 50 and an infrared illuminator 12 that irradiates light toward the imaging range of the infrared camera 11b, an infrared illuminator 13 that irradiates light toward the imaging range of the infrared camera 11b, and a radio wave sensor 14 that is integral with the infrared illuminator 13 and detects an occupant P in the vehicle cabin 51.
  • the occupant detection device 10 can ensure appropriate illuminance for the occupant P while preventing the camera unit 11 from becoming too large.
  • Embodiment 2 The occupant detection device 20 according to the second embodiment will be described with reference to Fig. 4 and Fig. 5.
  • Fig. 4 is a side view of a vehicle 50 equipped with the occupant detection device 20 according to the second embodiment.
  • Fig. 5 is a plan view of the vehicle 50 equipped with the occupant detection device 20 according to the second embodiment. Note that components having the same functions as those described in the first embodiment are denoted by the same reference numerals, and description thereof will be omitted.
  • the occupant detection device 20 according to the second embodiment has a structure in which the integrated infrared illuminator 13 and radio wave sensor 14 are moved toward the rear of the vehicle body compared to the structure of the occupant detection device 10 according to the first embodiment.
  • the integrated infrared illuminator 13 and radio wave sensor 14 are positioned in the center of the vehicle width direction, rearward of the driver's seat 52a and passenger seat 52b on the ceiling 53.
  • Figures 5 and 6 show an example in which the integrated infrared illuminator 13 and radio wave sensor 14 are positioned directly above the rear seat 52c on the ceiling 53.
  • the integrated infrared illuminator 13 and radio wave sensor 14 may also be positioned directly above the rearmost seat 52d on the ceiling 53.
  • the occupant detection device 20 positions the integrated infrared illuminator 13 and radio wave sensor 14 toward the rear of the vehicle body, so that the area where illumination is insufficient due to the infrared illuminator 12 can be supplemented by illumination from the infrared illuminator 13.
  • the infrared illuminator 13 and the radio wave sensor 14 are integrally arranged and positioned directly above the rear seat 52c or the rearmost seat 52d, which is located rearward of the driver's seat 52a. Therefore, the occupant detection device 20 can supplement the areas of the illumination range 12a of the infrared illuminator 12 that are insufficiently illuminable by illumination from the infrared illuminator 13.
  • the occupant detection device according to the present disclosure is suitable for use in occupant detection devices, etc., because the second illuminator, which is different from the first illuminator, and the radio wave sensor 14 are integrally provided, making it possible to prevent the camera unit from becoming too large.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Fittings On The Vehicle Exterior For Carrying Loads, And Devices For Holding Or Mounting Articles (AREA)
PCT/JP2022/043836 2022-11-29 2022-11-29 乗員検出装置 Ceased WO2024116256A1 (ja)

Priority Applications (2)

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JP2024561001A JPWO2024116256A1 (https=) 2022-11-29 2022-11-29
PCT/JP2022/043836 WO2024116256A1 (ja) 2022-11-29 2022-11-29 乗員検出装置

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2022/043836 WO2024116256A1 (ja) 2022-11-29 2022-11-29 乗員検出装置

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009205386A (ja) * 2008-02-27 2009-09-10 Nikon Corp 車載カメラシステムおよびその制御方法
JP2019123354A (ja) * 2018-01-16 2019-07-25 株式会社デンソー 乗員検知装置
JP2020136748A (ja) * 2019-02-14 2020-08-31 日本電産モビリティ株式会社 乗員監視装置
JP2021117202A (ja) * 2020-01-29 2021-08-10 ダイキョーニシカワ株式会社 生体検知装置の配設構造
JP7109707B2 (ja) * 2020-05-20 2022-07-29 三菱電機株式会社 車室内検知装置、および、車室内検知方法

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5400458B2 (ja) * 2009-04-21 2014-01-29 矢崎エナジーシステム株式会社 車載用撮影ユニット
JP2019217886A (ja) * 2018-06-19 2019-12-26 三菱電機株式会社 車載用ミラー装置
JP7433188B2 (ja) * 2020-10-15 2024-02-19 三菱電機株式会社 撮像装置、移動体用ディスプレイ、および、ドライバモニタリングシステム

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009205386A (ja) * 2008-02-27 2009-09-10 Nikon Corp 車載カメラシステムおよびその制御方法
JP2019123354A (ja) * 2018-01-16 2019-07-25 株式会社デンソー 乗員検知装置
JP2020136748A (ja) * 2019-02-14 2020-08-31 日本電産モビリティ株式会社 乗員監視装置
JP2021117202A (ja) * 2020-01-29 2021-08-10 ダイキョーニシカワ株式会社 生体検知装置の配設構造
JP7109707B2 (ja) * 2020-05-20 2022-07-29 三菱電機株式会社 車室内検知装置、および、車室内検知方法

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