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WO2008061997A1 - Dispositif et procédé pour faire la distinction, dans un véhicule automobile, entre des sièges pour enfants tournés vers l'arrière et des occupants adultes - Google Patents

Dispositif et procédé pour faire la distinction, dans un véhicule automobile, entre des sièges pour enfants tournés vers l'arrière et des occupants adultes Download PDF

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Publication number
WO2008061997A1
WO2008061997A1 PCT/EP2007/062599 EP2007062599W WO2008061997A1 WO 2008061997 A1 WO2008061997 A1 WO 2008061997A1 EP 2007062599 W EP2007062599 W EP 2007062599W WO 2008061997 A1 WO2008061997 A1 WO 2008061997A1
Authority
WO
WIPO (PCT)
Prior art keywords
seat
motor vehicle
distance
light beam
sensors
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/EP2007/062599
Other languages
German (de)
English (en)
Inventor
Holger Faisst
Gerald Schicker
Gerhard Wild
Holger Winkler
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.)
Continental Automotive GmbH
Original Assignee
Continental Automotive GmbH
Siemens VDO Automotive AG
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 Continental Automotive GmbH, Siemens VDO Automotive AG filed Critical Continental Automotive GmbH
Publication of WO2008061997A1 publication Critical patent/WO2008061997A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
    • B60R21/01—Electrical circuits for triggering passive safety arrangements, e.g. airbags, safety belt tighteners, in case of vehicle accidents or impending vehicle accidents
    • B60R21/015—Electrical circuits for triggering passive safety arrangements, e.g. airbags, safety belt tighteners, in case of vehicle accidents or impending vehicle accidents including means for detecting the presence or position of passengers, passenger seats or child seats, and the related safety parameters therefor, e.g. speed or timing of airbag inflation in relation to occupant position or seat belt use
    • B60R21/01512—Passenger detection systems
    • B60R21/0153—Passenger detection systems using field detection presence sensors
    • B60R21/01538—Passenger detection systems using field detection presence sensors for image processing, e.g. cameras or sensor arrays
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
    • B60R21/01—Electrical circuits for triggering passive safety arrangements, e.g. airbags, safety belt tighteners, in case of vehicle accidents or impending vehicle accidents
    • B60R21/015—Electrical circuits for triggering passive safety arrangements, e.g. airbags, safety belt tighteners, in case of vehicle accidents or impending vehicle accidents including means for detecting the presence or position of passengers, passenger seats or child seats, and the related safety parameters therefor, e.g. speed or timing of airbag inflation in relation to occupant position or seat belt use
    • B60R21/01512—Passenger detection systems
    • B60R21/0153—Passenger detection systems using field detection presence sensors
    • B60R21/01534—Passenger detection systems using field detection presence sensors using electromagneticwaves, e.g. infrared
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
    • B60R21/01—Electrical circuits for triggering passive safety arrangements, e.g. airbags, safety belt tighteners, in case of vehicle accidents or impending vehicle accidents
    • B60R21/015—Electrical circuits for triggering passive safety arrangements, e.g. airbags, safety belt tighteners, in case of vehicle accidents or impending vehicle accidents including means for detecting the presence or position of passengers, passenger seats or child seats, and the related safety parameters therefor, e.g. speed or timing of airbag inflation in relation to occupant position or seat belt use
    • B60R21/01556—Child-seat detection systems

Definitions

  • the invention relates to a device and a method for distinguishing between rear-facing child seats and adult occupants in a motor vehicle, according to the preambles of claims 1 and 15.
  • Modern airbag deployment devices provide to make a triggering of the airbag in an accident depending on whether a seat equipped with an airbag is occupied or free, or what type of occupancy is present, for example, whether with a person or with an object.
  • airbag deployment devices previously installed in motor vehicles provide weight sensors for the vehicle seats or sensor mats arranged in the seats of the vehicle seats. From a certain weight or a certain size of the surface is applied to the pressure takes place in an accident triggering the airbag.
  • Weight sensors have the disadvantage that they are only able to determine the force with which an object or a person presses on the seat surface. This force is dependent, for example, on the belt force of the safety belt.
  • weight sensors are unable to distinguish between persons and objects.
  • the sensor mats consisting of areally arranged, pressure-sensitive sensors, derive from the size and shape of the area, on which pressure is exerted on the seat surface, whether an adult is seated on the seat surface. A distinction between objects and persons is only possible to a limited extent.
  • capacitive sensors are also known that are capable of detecting occupants and objects based on the change in permeability caused by an occupant or an object. Again, this is a distinction between persons and objects only limited possible.
  • the known solutions are also very expensive in their production and integration in motor vehicles.
  • Another disadvantage of the known weight sensors and sensor mats is that they have to be made separately or platform-dependent for each vehicle model or for each vehicle seat.
  • smart airbags are also able to detect the position of an occupant or object, for example, in terms of whether the occupant bends forward, or assumes a reclined position to the airbag to the situation Accident events adapted to unfold.
  • the apparatus comprises a number of seated laser light sources that form a plurality of discrete spots to detect the contour of the seat in the form of light spots.
  • the device also comprises a sensor field which is arranged at a defined distance from the seat and on the individual receiving surfaces of which the individual luminous surfaces are imaged over the surface of the seat.
  • the device further comprises an evaluation unit, which is based on the geometric assignment of the on the surface of the seat mapped. Deten individual luminescent spots to the illuminated receiving surfaces of the sensor field determines the contour of the seat, the occupancy of the seat with a person with an object or an unoccupied seat is distinguishable.
  • the evaluation unit is also able to detect child seats. Between persons and objects is distinguished by the infrared radiation of the person. Within a certain temperature range, this makes it impossible to distinguish between persons and objects.
  • Another disadvantage of the known device is its high production costs due to the large number of laser light sources and the pre-input of recognizable contours, as well as their unreliability with respect to the detection of child seats and with respect to the distinction between persons and objects.
  • EP 1 031 477 B1 it is known to contactlessly detect the position of a person or an object in the interior of a motor vehicle by means of one or more beam curtains running parallel to the transverse axis of the motor vehicle.
  • the position of a person or an object is determined using the methods of transit time measurement or triangulation.
  • a distinction between a person and an object, in particular a reboard child seat is not provided.
  • From DE 199 08 214 B4 is also known to detect the position of a person or an object in the interior of a motor vehicle by one or more parallel to the transverse axis of the motor vehicle extending beam curtains contactless using the methods of transit time measurement or triangulation.
  • a device provided for this purpose also has means for detecting contamination of a protective cover from the radiation source and the sensor receiving reflected radiation in order to improve the reliability of such a device.
  • a distinction between a person and an object, in particular a Reboard child seat is not provided.
  • From DE 199 08 167 A1 it is known to use devices for detecting the position of a person or an object in the interior of a motor vehicle or parts of such a device also for other functions, in particular for comfort functions in a motor vehicle.
  • EP 1 114 756 A2 discloses a device for distinguishing occupants in a motor vehicle.
  • the device comprises at least one light source, which emits at least one fan-shaped light beam with a predetermined opening angle transversely to the longitudinal axis of the motor vehicle, whereby at least one light fan extending parallel to the longitudinal axis is clamped, which illuminates a predetermined area in front of the light source.
  • the device comprises a receiver which comprises a multi-sensor sensor array, each of which detects its own, limited angular range (10) within the opening angle of the area illuminated by the light beam, and within one within a predeterminable distance range and within For him observed angle range lying reflection point of an object generates an assignable to the distance of the reflection point output signal.
  • the device has an evaluation unit connected to the receiver, which generates a distance profile from the output signals of the individual sensors of the sensor field.
  • a device for detecting the occupancy of a vehicle seat wherein a stereo skopische image recording device with at least one optical sensor, the scene of the vehicle seat in a viewing direction from the front of the vehicle seat receives and derives therefrom a divided into several zones depth map indicating a distance from a reference point for each zone.
  • the at least one optical sensor which consists of the stereoscopic image pickup device, a the relationship between the incident light intensity and its electrical output signal descriptive, non-linear transducer characteristic whose slope decreases with increasing light intensity.
  • a device for detecting the occupancy of a vehicle seat in which a number of light emitters are imaged via an optical system on the seat and the light spots arising thereon via a further optical system on a photodetector array.
  • the contour is detected and thus determines the type of occupancy.
  • This information can be supported by passive IR detectors to detect the temperature difference.
  • the image sensor used is a sensor with high photosensitivity, which can be read out pixel-by-pixel and optionally, and has an adjustable integration time for each pixel. As a result, three-dimensional distance images can be recorded with high reliability.
  • a device for detecting the occupancy of a vehicle seat comprising at least two image pickup sections, which are arranged at a predetermined distance from each other, a measuring section for measuring a distance to an object on the basis of at least two images, the at least two image pickup sections, a reference data providing section for providing reference data regarding the distance from the image pickup sections to a seat in accordance with the position of the seat, and a
  • a detection section for detecting occupancy of the seat on the basis of the distance measured by the measuring section and the reference data.
  • An object of the invention is to provide a device which allows a more reliable distinction between adult occupants and rear-facing child seats in a motor vehicle and which can be easily and universally integrated into an interior of a motor vehicle.
  • a first object of the invention relates to a device for distinguishing between rear-facing child seats and occupants in a motor vehicle.
  • the device comprises at least one light source which emits at least one fan-shaped or cone-shaped light beam at a predetermined opening or solid angle over the seat back and seat surface of at least one seat of a motor vehicle transversely to the longitudinal axis of the motor vehicle, whereby from the viewpoint of the light source a parallel to A light cone with a diametrical extent extending for example along the longitudinal axis of the motor vehicle is clamped parallel to the longitudinal axis of the motor vehicle and illuminates a predetermined area with an extension in the direction of the longitudinal axis of the motor vehicle in front of the light source.
  • the device comprises a receiver comprising a sensor array consisting of a plurality of sensors, each of which detects its own, limited angular range within the opening or solid angle of the area illuminated by the light beam.
  • a sensor array consisting of a plurality of sensors, each of which detects its own, limited angular range within the opening or solid angle of the area illuminated by the light beam.
  • Each of the sensors generates at a lying within a predetermined distance range and within the angular range observed by him, the emitted light from the light source diffusely backscattering reflection point of an object an equivalent to the distance of the reflection point output signal.
  • the apparatus further comprises an evaluation unit connected to the receiver, which generates from the output signals of the individual sensors of the sensor field a Ab- profile in which the projecting into the light fan or cone seat back as a fixed reference point and in the field of light fan or Kegeis over the seat of reaching occupant or object occur as a relief-like survey and on the basis of an empty seat, for example, an adult inmate and a rear-facing child seat is distinguishable.
  • the device also provides that the light beam is emitted with changing wavelength.
  • laser triangulation sensors which convert a laser light source and a receiver designed as a photodiode with a strip-shaped light-sensitive surface. believe it. With them, the distance to a spot illuminated by the laser light source can be measured on the surface of an object such as an object or a person. The location is called a reflection point. The position of a point of impact of the laser light reflected at the reflection point and scattered back diffusely along the strip-shaped, light-sensitive surface changes depending on the distance of the reflection point to the laser triangulation sensor. Depending on the location of the impact point, the ratio between certain currents in the laser triangulation sensor changes.
  • the ratio of these electrical currents gives an analog output signal which is thus a measure of the distance of the reflection point from the laser triangulation sensor.
  • the receiver of the laser triangulation sensor described above is known as a PSD sensor derived from a Photo-Sensitive Device or Position Sensing Detector.
  • PSD sensor derived from a Photo-Sensitive Device or Position Sensing Detector.
  • the advantage of this type of receiver is an easy-to-implement measuring electronics and its high sampling rate of up to 10MHz.
  • An alternative receiver with a similar function principle is a CCD sensor derived from charge coupled device.
  • a light source which emits a fan-shaped or cone-shaped laser beam with a predetermined opening or solid angle.
  • the light source can be a low-cost LED, but also a laser.
  • an area predetermined by the opening angle or the solid angle is illuminated in front of the light source.
  • a receiver which comprises a multi-sensor sensor array, each of which is capable of determining a distance to a reflection point on an object within a given range of distances and within the range illuminated by the fan or conical light beam , Each sensor observes its own angular range within the opening or solid angle of the area illuminated by the light beam.
  • Each sensor generates at a within the predetermined distance range and in Direction of the angle range observed by him reflection point a the distance of the reflection point analog output signal.
  • An object lying within the area illuminated by the fan or conical light beam may be, for example, an occupant and / or an object, such as a seat back and / or a child seat, in particular a rear-facing child seat.
  • An evaluation unit connected to the receiver creates a distance profile from the distances determined by the individual sensors of the sensor field.
  • An unoccupied seat, a seat occupied by a, for example, adult, occupant and a seat occupied by a rearward-facing child seat each produce different spacing profiles.
  • the device according to the invention can distinguish between an empty seat, an occupant and a rear-facing child seat.
  • the individual sensors of the sensor field can be, for example, PSD sensors or CCD sensors. It is also conceivable to use a CMOS sensor. Such sensors have a much higher dynamic range and thus have a much higher brightness range within which they can be used. For example, CMOS sensors can see much better in the dark than other sensors.
  • the device according to the invention can be reliably operated in conjunction with suitable filtering of the light independently of the prevailing temperature and light conditions.
  • both the triangulation principle and the principle of transit time measurement are suitable as the measuring principle according to which the distances to the reflection points are determined.
  • the device according to the invention has the advantage over the prior art that it has manageable, inexpensive, as well as easy to integrate in a motor vehicle means is able to distinguish between a blank seat, an adult occupant and a rear-facing child seat.
  • An advantageous embodiment of the invention provides that the sensors of the sensor array are PSD sensors and / or CCD sensors and / or CMOS sensors. Such sensors are known and available on the market and thereby allow a cost-effective production of the device according to the invention.
  • Another advantageous embodiment of the invention provides that the light beam is emitted in a pulse-like manner from the light source. As a result, the radiation exposure of the occupants is kept low because the light beam is emitted not at continuous but at discrete times. Another advantage is a lower ambient light dependence, since short-term emitted pulses can be emitted brighter than the ambient light.
  • a particularly advantageous embodiment of the invention provides that the light source emits an infrared light beam. Infrared light is outside the wavelength range detectable by the human eye and thus does not distract the driver of the motor vehicle from the traffic.
  • the light source is a Lambert radiator. This ensures that the area which is limited by the opening or spatial angle and illuminated by the light beam is uniformly illuminated. This can ensure that the sensors in all angular ranges a sufficient diffuse backscatter is available for the detection.
  • the light source is a line laser.
  • the device is arranged laterally of a seat in the interior of a motor vehicle. An arrangement laterally of a seat allows a particularly reliable distinction between a, for example adult, occupants, a rear-facing child seat and free seat, as results from this observation direction a particularly easy interpretable distance profile.
  • the device according to the invention is arranged in the B-pillar. An arrangement in the A or B pillar allows a largely platform-independent configuration of the device according to the invention.
  • the device is disposed above a seat in the interior of a motor vehicle.
  • An arrangement above a seat allows for a simple integration into a motor vehicle and on the other hand a reliable distinction between adult occupant, rear-facing child seat and free seat, as results from this direction of observation also a particularly easy interpretable distance profile.
  • the device according to the invention is arranged in the headliner, for example in the area of the rearview mirror or in the area of the interior lighting or in the area of the overhead console with the actuating devices, for example for sunroof, interior lighting, on-board computer and the like.
  • An arrangement in the headliner allows a platform-independent configuration of the device according to the invention.
  • Both an arrangement of the device according to the invention laterally of a seat, as well as above a seat allows a reliable distinction between adult occupant, rear-facing child seat and free seat in all seat and backrest settings.
  • the predetermined distance range comprises 0 to 60 cm.
  • This Distance range is particularly advantageous in a lateral arrangement of the device according to the invention, since the center of the seat on which there is an object there, in particular a person or a child seat has its largest dimensions, not further away, for example, from the B-pillar.
  • the distance range also covers the case that an adult or an object covers the device according to the invention.
  • the predeterminable distance range encompasses 10 to 120 cm. This distance range is particularly advantageous in an arrangement of the device according to the invention above a seat, especially in the headliner, since the distance of an object, in particular a person or a child seat from the headliner is within this order of magnitude.
  • An additional advantageous embodiment of the invention provides that the opening or solid angle of the fan or conical light beam is 90 °. As a result, a particularly wide adjustment range of a seat can be observed with sufficient accuracy from only one point,
  • the receiver determines the distance to a reflection point by transit time measurement or by triangulation.
  • a second subject of the invention relates to a method for distinguishing between rear-mounted child seats and adult occupants in a motor vehicle.
  • the method according to the invention comprises the method steps:
  • the algorithm may include, for example, an integration of the area under a curve formed by the individual distance values, or a comparison with reference profiles or the like.
  • An advantageous embodiment of the method according to the invention provides that the predetermined range is illuminated by a light source arranged at a single point. As a result, a particularly low production cost is achieved, since only a single light source that illuminates a predefinable opening or solid angle range is required.
  • FIG. 2 is a detailed view of the receiver and the evaluation unit of FIG. 1 in an enlarged view
  • Fig. 3 is a schematic representation of an integration of a device according to the invention in the B-pillar of a motor vehicle.
  • An inventive device 1 shown in FIG. 1 for distinguishing between rear-facing child seats and adult occupants in a motor vehicle essentially comprises an infrared light source 2, a receiver 3 and an evaluation unit 4 connected to the receiver 3.
  • the infrared light source 2 transmits a fan-shaped or cone-shaped infrared light beam 5 with a predetermined ⁇ réellespp. Solid angle 6 off.
  • the receiver 3 comprises a sensor array 9 consisting of several sensors 8. Each sensor 8 observes its own, limited angular range 10 within the opening or solid angle 6 of the area 7 illuminated by the infrared light beam 5 (FIG. 2).
  • the sensors 8 are capable of detecting distances within a predefined distance range 11 within the angular range observed by them.
  • Each of the sensors 8 generates a reflection point 12 of an object 13, which can be both a person or an object, within the predeterminable distance range 11 and within the angular range 10 observed by it, diffusing the infrared light back diffusely backward to the distance of the reflection point 12 analogue output signal.
  • the evaluation unit 4 connected to the receiver 3 generates a distance profile from the output signals of the individual sensors 8 of the sensor field 9 and knowing the angular ranges 10 detected by the respective sensors 8 a blank seat, an adult occupant and a rear-facing child seat is distinguishable.
  • FIG. 1 shows a greatly simplified, schematic representation of the measurement principle with strongly distorted size ratios.
  • the receiver 3 and the laser light source 2 in the immediate vicinity, for example, directly above one another, as shown in Fig. 3 are arranged in a single housing, so that the illuminated area 7 and the from the individual angular regions 10 composing, covered by the sensors 8 of the sensor array 9 of the receiver 3 area cover.
  • an optic which directs the beam path of laser light reflected at different reflection points 12 on the object 13, depending on in which angle range 10 the respective reflection point 12 is observed by one of the sensors 8, to the respective sensor.
  • FIG. 3 An integration of the device 1 in the B-pillar 14 of a motor vehicle is shown in Fig. 3.
  • Light source 2 and receiver 3 are housed in a common housing in close proximity to each other.
  • the evaluation unit 4 can be arranged at any point in the motor vehicle, for example, in the same housing, such as the light source 2 and the receiver 3.
  • the device 1 sends a fan or conical light beam 5 with an ⁇ réellesl. Solid angle 6 of 90 ° about seat back 15 and seat 17 of a seat 18 across transverse to the longitudinal axis 19 of the motor vehicle.
  • a predetermined by the opening or solid angle 6 area 7 is illuminated with an extension parallel to the longitudinal axis 19 of the motor vehicle.
  • the sensors 8 of the sensor field 9 of the receiver 3 shown in FIG. 2 each observe different angular ranges 10 of the opening or solid angle 6 of the light beam 5. Is an object 13, such as a seat back 15 and / or an adult occupant 16 of the motor vehicle, within the area 7 illuminated by the light beam 5 and within the distance range 10 , so the individual sensors 8 do not observe the entire illuminated part of the object 13, but only within the respective angular regions 10 lying sections, the so-called reflection points 12.
  • Each of these reflection points 12 radiates a part of the light beam 5 emitted by the device 1 diffuse back, whereby the distances to the respective reflection points 12 can be determined by means of the sensors 8 of the sensor field 9 of the receiver 3 observing the corresponding angular ranges 11.
  • the evaluation unit 4 of the device 1 creates from the measured distances a distance profile in which the seat back 15 as a fixed reference point and an object 13, such as an occupant or an object, as a relief-like elevation occur, and based on the between an empty seat 18th , an adult occupant and a rear-facing child seat can be distinguished.
  • the distinction is made by means of a suitable algorithm, for example by integration of the area under a curve formed by the individual distance values, or by comparison with reference profiles or the like.
  • the information about the type of occupancy of a seat can now be used or made available for the decision on an airbag deployment.
  • the invention provides for distinguishing between a child safety seat and an adult occupant of a motor vehicle by infrared laser triangulation.
  • a so-called line laser with a predetermined opening angle as well as a suitable receiver is used which comprises a sensor field consisting of a plurality of sensors.
  • PSD sensors or CCD sensors or CMOS sensors are provided.
  • a line laser emits light in a narrow wavelength range rich, preferably monochromatic light.
  • a PSD sensor derived from the Photo-Sensitive Device or Position Sensing Detector, basically represents a photodiode with a strip-sensitive illumination-sensitive surface. Depending on the position of a light spot reflected by an object or a person on the illumination-sensitive surface, an analog signal is output.
  • the advantage of this type of receiver is an easy-to-implement measuring electronics and its high sampling rate of up to 10MHz.
  • the distance measurement is done by triangulation. In the case of a vacant, unoccupied seat or an unused Reboad child seat, only the seat back is within the detection range. This results in a limited area within which only small distances are measured. If the seat is occupied by an adult occupant, the area within which small distances are measured is much larger. This larger area results from the backrest and the width of the upper body of the occupant.
  • Preferred arrangements of the device according to the invention in the interior of a motor vehicle are on the one side of a seat and the other above a seat.
  • the distance measurement takes place from the side.
  • the infrared light emitting line laser and the associated sensor field of the receiver are arranged laterally of the seat, for example in the B-pillar of the motor vehicle.
  • the predetermined distance range covers preferably from 0 to 60 cm.
  • the distance measurement takes place from above.
  • the line laser emitting infrared light and the associated sensor field of the receiver are arranged above the seat, for example in the headliner.
  • the predetermined distance range covers preferably 10 to 60 cm.
  • the line laser has an opening or solid angle of preferably 90 °, or generates a fan or a cone with an opening or solid angle of preferably 90 °.
  • the procedure for the distinction according to the invention between adult occupants and rear-facing child seats is straightforward and makes use of existing sensor technologies in its implementation.
  • the integration concept in the headliner allows a general structure that can be used in different vehicle platforms.
  • the platform-independent design of the device according to the invention reduces development and manufacturing costs for both the components of the device, such as light source, receiver and evaluation unit, as well as for the integration of the device in a motor vehicle.
  • the device described above can also be applied to vehicle occupants in the driver's seat and in the rear seats.
  • Both the embodiment with arrangement of the device according to the invention laterally of the seat, as well as above the seat work reliably for all seat and backrest settings.
  • it is also conceivable to monitor all seats in the motor vehicle with regard to occupancy and type of occupancy with only one device according to the invention arranged in the interior of a motor vehicle.
  • the device according to the invention By a periodic modulation of the emitted infrared laser light in conjunction with a suitable, corresponding filtering of the infrared laser light, the device according to the invention, regardless of the brightness of the environment from direct sunlight to complete darkness for distance measurement and thus to distinguish between reboard child seats and adult vehicle occupants be used.
  • the device according to the invention is much more durable, fail-safe and low-maintenance than the known weight sensors or sensor mats.
  • the production cost of a device according to the invention for distinguishing between rear child seats and adult vehicle occupants is considerably lower than for similar devices operating by means of weight sensors or sensor mats.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Computer Vision & Pattern Recognition (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Air Bags (AREA)
  • Length Measuring Devices By Optical Means (AREA)

Abstract

L'invention concerne un dispositif (1) et un procédé pour faire la distinction, dans un véhicule automobile, entre des sièges pour enfants tournés vers l'arrière et des occupants adultes (16). Le dispositif (1) comprend : une source lumineuse (2) qui émet un rayon lumineux (5) en forme de cône ou d'éventail transversalement à l'axe longitudinal (19) d'un véhicule automobile, rayon qui éclaire une région prédéfinie (7) devant la source lumineuse (2) ; un récepteur (3) qui comprend un champ de capteurs (9) constitué de plusieurs capteurs (8), chaque capteur détectant une propre plage angulaire limitée (10) à l'intérieur de la région éclairée (7) et produisant, lorsqu'un point de réflexion (12) d'un objet (13) se trouve à l'intérieur d'une plage de distance prédéfinissable (11) et à l'intérieur de la plage angulaire (10) observée par ce capteur, un signal de sortie analogue à la distance du point de réflexion (12) ; et une unité d'interprétation (4) qui est reliée au récepteur (3) et qui établit, à partir des signaux de sortie du champ de capteurs (9), un profil de distance à l'aide duquel on peut faire la distinction entre un siège inoccupé, un occupant adulte (16) et un siège pour enfant tourné vers l'arrière.
PCT/EP2007/062599 2006-11-23 2007-11-20 Dispositif et procédé pour faire la distinction, dans un véhicule automobile, entre des sièges pour enfants tournés vers l'arrière et des occupants adultes Ceased WO2008061997A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE200610055343 DE102006055343B3 (de) 2006-11-23 2006-11-23 Vorrichtung und Verfahren zur Unterscheidung zwischen rückwärts angeordneten Kindersitzen und erwachsenen Insassen in einem Kraftfahrzeug
DE102006055343.8 2006-11-23

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WO2008061997A1 true WO2008061997A1 (fr) 2008-05-29

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PCT/EP2007/062599 Ceased WO2008061997A1 (fr) 2006-11-23 2007-11-20 Dispositif et procédé pour faire la distinction, dans un véhicule automobile, entre des sièges pour enfants tournés vers l'arrière et des occupants adultes

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WO (1) WO2008061997A1 (fr)

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DE102019121220B4 (de) * 2019-08-06 2025-05-22 Brose Fahrzeugteile SE & Co. Kommanditgesellschaft, Coburg Vorrichtung und Verfahren zum Detektieren des Zustandes eines Kraftfahrzeugteiles
DE102022110273A1 (de) 2022-04-27 2023-11-02 Bayerische Motoren Werke Aktiengesellschaft Vorrichtung und verfahren zur bestimmung einer belegung eines sitzes eines kraftfahrzeugs durch ein objekt

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DE19757595A1 (de) 1997-12-23 1999-07-01 Siemens Ag Verfahren und Vorrichtung zur Aufnahme eines dreidimensionalen Abstandsbildes
DE19945645A1 (de) 1998-09-25 2000-04-20 Honda Motor Co Ltd Vorrichtung zum Erfassen der Belegung eines Fahrzeugsitzes
DE19852653A1 (de) 1998-11-16 2000-05-18 Bosch Gmbh Robert Vorrichtung zum Erfassen der Belegung eines Fahrzeugsitzes
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DE19908214A1 (de) 1999-02-25 2000-09-21 Siemens Ag Strahlungsemittierende Vorrichtung und Verfahren zum Erfassen eines Objektes oder einer Person in Innenraum eines Fahrzeugs
DE19908167A1 (de) 1999-02-25 2000-08-03 Siemens Ag Insassenschutzsystem
EP1114756A2 (fr) 2000-01-04 2001-07-11 Siemens Aktiengesellschaft Dispositif de commande pour déclencher un dispositif de retenue, notamment pour des coussins gonflables
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