• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    System (1) for detecting the passenger compartment of a vehicle equipped with a seat comprising a control module (2) and at least one detection module (3). The control module (2) uses the data measured by the detection module (3), which comprises at least one laser rangefinder (4).
    公开号:FR3052721A1
    申请号:FR1755544
    申请日:2017-06-19
    公开日:2017-12-22
    发明作者:Christian Ohl；Dominik Neeser；Philipp Troebner；Thomas Kiess
    申请人:Robert Bosch GmbH；
    IPC主号:
    专利说明:

    Field of the invention
    The present invention relates to a system for detecting the passenger compartment of a vehicle equipped with a seat, comprising a control module and at least one detection module, the control module using the data measured by the detection module . The invention also applies to a method for detecting the passenger compartment of a vehicle.
    State of the art
    Such systems and methods are generally known. For example, it is known to detect a passenger using pressure-sensitive sheets, integrated into the vehicle seats. The disadvantage of this solution is to detect only a mass (or pressure) so that the occupation of the seat with an object will be interpreted erroneously as corresponding to the presence of a passenger.
    In addition, cabin detection systems using a camera are known. These systems have the disadvantage of having a large footprint and rely heavily on ambient lighting. These systems are not reliable at night or in poor lighting conditions. In addition, at least two cameras are required to obtain reliable information about distance and size conditions.
    Finally, there are known systems using for detection flight time measurements, that is to say cameras with travel time measurements for measuring distances. Travel time measurements are, however, especially suitable for long distances. In the case of reduced distances such as those in a vehicle, such travel time measurements have insufficient resolution.
    In addition, the known systems do not reliably detect the state of the volumes receiving loads such as for example, the rear window of a vehicle or objects placed on the seats such as, for example, seats for children and in particular to check safely if these seats are used.
    Purpose of the invention
    The present invention aims to develop a system and a method of detecting the passenger that is insensitive to external disturbances and can quickly detect passengers and objects in the cabin and classify them.
    DESCRIPTION AND ADVANTAGES OF THE INVENTION For this purpose, the subject of the invention is a system of the type defined above, characterized in that the detection module comprises at least one laser rangefinder. The invention also relates to a method for detecting the passenger compartment of a vehicle comprising a process system according to which, in a first step, the detection module measures data, in a second step, the detection module transmits the data. measured data to the control module, in a third step, the control module determines from the measured data, the information concerning the presence and / or the position of a passenger, including information concerning the difference between the position and a predetermined setpoint position and / or an object.
    The system and method of the invention have the advantage, vis-à-vis the state of the art, to allow, by the laser range finder, to achieve with a laser range finder rapid detection and compact of the passenger compartment, regardless of external conditions such as lighting conditions. As there is no exploitation of the image, for example in case of failure, the release of the airbags can be done very quickly. In addition, thanks to its small size, the system according to the invention can be installed without difficulty in old vehicles.
    Preferably, the vehicle is a motor vehicle, including a passenger vehicle or a commercial vehicle. In a particularly preferred manner, the vehicle has several seats, including front seats and rear seats. Preferably, the control module comprises at least one microcontroller. The control module is connected by the vehicle electronics to at least one detection module and in a very preferential manner, the control module is connected without a cable to the detection module. The control module comprises a data exploitation unit transmitted by the detection module.
    According to a preferred development, the laser telemeter is a laser operating according to the automatic mixing method, in particular a surface emitter with integrated photodiodes (integrated cavity photodiode vertical cavity laser, VCSE-LiP). The method of measuring self-mixing (interference by SMI automix) is a known method and is based on the fact that an emitted laser beam is reflected by an object; the reflected laser beam interferes with the emitted laser beam, so that the laser interference modifies the optical and / or electronic properties of the laser beam. These variations are analyzed to determine the distance of the reflective object.
    Thus, the invention advantageously makes it possible to produce a very compact rangefinder for precise and rapid measurements. This allows in particular distance measurements with a resolution of the order of one millimeter mm for a time up to gs. The very high spatial and temporal resolution also makes it possible, advantageously, to use distance measurements made at the same place at different times to make a classification, in particular to determine a deviation from a setpoint position. For example, it can detect a toddler who has slipped into his child seat and thus trigger an alarm or detect a passenger who moves on his seat, which can conclude to the presence of a person within the limits of an object.
    According to a preferential development, the laser rangefinder makes a point, linear and / or surface telemetry. In a particularly preferred manner, the laser rangefinder comprises a mirror device and, in a very preferential manner, a micromirror device, in particular a network of micro-mirrors. The mirror device thus directs the laser beam to move along a line or surface and detect a zone in linear or surface mode.
    Preferably, the laser range finder is configured so that the laser beam performs an X-shaped detection thus achieving a compromise between a linear detection and a surface detection. The invention advantageously makes it possible to flexibly detect the passenger compartment using the laser telemeter. Thus, depending on the selected detection and the laser telemeter arrangement, any distance profile can be established.
    According to a preferred development, the detection module further comprises a pressure and / or weight sensor and / or an image sensor, in particular a camera-type sensor. In a particularly preferred manner, the detection module has a pressure-sensitive layer integrated in the seat. In a very preferential manner, the detection module comprises a system of stereoscopic cameras.
    Thus, the invention advantageously makes it possible to combine the precise telemetry of the laser rangefinder with known techniques to arrive at a complete and as precise detection as possible of the passenger compartment. In particular, the redundant information provided by different sensors avoids defects and improves the accuracy of the system. Thus, for example, a pressure sensor in the form of a pressure-sensitive sheet integrated in the driver's seat to detect the occupation of the driver's seat and then the laser range finder is provided. to determine a profile of depth and / or relief. This makes it possible to avoid classification errors, that is to say, for example, to interpret an object as a passenger. Alternatively or in addition, it will be possible to pre-classify the occupancy or not of a vehicle seat by a camera sensor then by precise measurements concerning the dimensions and the distance with the laser range finder, to grasp, by example, more precisely a position.
    According to a preferred development, a detection module is associated with each seat of the vehicle. Alternatively or additionally, a detection module is associated with each seat device and in particular a detection module is associated with the front seat and a detection module is associated with the rear seats.
    Thus, the invention allows precise detection and in particular it will avoid defects caused by the overlap in the area to be detected.
    According to a preferred development, the detection module is at least partly above, below, in front of and / or behind the seat. In a particularly preferred manner, a first laser rangefinder is installed above the seat and a second laser rangefinder is installed in front of the seat, the detection directions of the two range finders being in particular perpendicular to each other. In a particularly preferred manner, a laser rangefinder is installed in the middle, above the vehicle seat.
    According to the invention, it is thus possible advantageously by the combination of different sensors, to obtain a complete spatial image of the interior volume. Specifically, in the case of several laser rangefinders, it is advantageously possible to obtain a spatial profile of the passenger compartment using the advantages of laser rangefinders, in particular the very high resolution both in space and in time.
    According to a preferred development, at least the detection module monitors the state of charge of the vehicle. In a particularly preferred manner, at least one detection module monitors the load volume, in particular the volume of the boot and / or the rear window. The invention advantageously avoids the risk of defective attachment or the absence of fixation of an object. In particular, in the case of delivery vehicles, secure securing of the load is very important and in particular passengers can be seriously injured by loose or unsecured objects, for example, in the case of sudden braking or a change of direction. The permanent detection of the space occupied by the loads makes it possible in this case, advantageously, to detect a load that has slipped and / or which has fallen and to warn or inform the driver if necessary by means of display.
    According to a preferred development, the control module is connected to a security module and the control module is configured to process the data to the security module. The data comprising information concerning the presence and / or position of a passage, in particular information concerning the difference between the position relative to a predefined target position and / or an object.
    According to the invention, it is advantageous to adapt the safety functions of the vehicle according to the detected state of the passenger compartment. This allows in particular to detect an offset position. If, for example, a passenger in the front passenger seat puts his / her feet on the dashboard, in the event of an accident and due to the triggering of the passenger airbag, he / she may suffer serious damage. The system according to the invention advantageously allows the detection module to detect this positional deviation of the passenger; the control module recognizes this deviation and transmits it to the security module so that the latter preferably emits an alarm message and / or temporarily cancels the airbag. It is also possible, as described above, to detect an unwanted change of position of a small child in his seat and to inform the driver.
    According to a preferred development, in particular of the method of the invention, in a fourth step, the control module transmits the information to the security module.
    Thus, the invention advantageously makes it possible to achieve the advantages mentioned above, in particular to warn the driver and / or the passenger or to activate vehicle safety functions, in a targeted manner or else to neutralize them and / or to modify them. The security module controls the triggering of at least one air cushion and / or the passenger restraint systems in the event of an accident. For example and in addition, it detects the possibility of an automatic cut-off of the airbag if using a child seat. drawings
    The present invention will be described hereinafter in more detail with the aid of examples of systems for detecting the vehicle passenger compartment and methods for implementing such systems shown in the accompanying drawings in which: FIGS. 1a and 1b show an embodiment of a system according to the invention in a schematic presentation; FIGS. 2-7 show another embodiment of the invention of the system with a schematic view.
    In the different figures, the same references will be used for the same elements, the description of which will not be systematically repeated.
    Description of Embodiments of the Invention
    Figure la shows a schematic representation of a system 1 according to one embodiment of the invention. The left side of the image shows a vehicle seat with a seat-mounted passenger. The cabin detection system 1 comprises a detection module 3 with a first laser rangefinder 4 installed above the seat and a second laser rangefinder 4 'installed in front of the seat. The two laser rangefinders 4, 4 'are preferably lasers operating according to the principle of interferences by the automatic mixing which measures distances along a line; they are controlled by a device of mirrors by establishing in this manner profiles of removal. Thus, for example, the laser rangefinder 4 which is above the seat measures in the direction of flow, from back to front and / or reciprocally to generate a depth profile; the laser range finder 4 'installed in front of the driver's seat is measured from the bottom upwards and / or vice versa, the expression "at the bottom" relating to the floor of the vehicle and the expression "upwards" relating to the roof of the vehicle. In this way, a height profile is established.
    The measurement data are transmitted by the detection module 3 to a control module 2 which exploits the data and which, in this case, recognizes the passengers and also determines their position. This data is also transmitted by the control module 2 to a security module 7 which, according to the data transmitted by the control module 2, activates the security functions of the vehicle, for example, the passenger restraint system and / or the air bag system.
    In the context of the system according to the invention or the method according to the invention, it is possible for the control module 2 to detect a change of position of the passengers of the vehicle meaning that it is a fall asleep or a risky position for safety; the security module 7 is thus informed and then warns, for example, the passengers by an acoustic display means and / or optical.
    FIG. 1b shows, in its right part, the distance profiles as provided by the detection module 3. It appears directly that the combination of the depth profile determined by the laser telemetry apparatus 4 and the second laser rangefinder 4 'allows, by the height profile, to conclude the presence of passengers. Preferably, the control module 2 comprises an operating unit which, in particular by applying pattern recognition algorithms, is associated with the distance profiles (combined profiles) of the passengers or objects and / or positions.
    Figure 2 shows a system 1 according to another embodiment of the invention shown schematically. The embodiment is substantially the same as the other embodiments. The detection module 3 comprises here, in addition, known laser rangefinders 4, 4 'corresponding to Figures la and Ib, a first sensor 6 applying the laser principle and a second camera sensor 6'. These two sensors are located on the side of the vehicle seat and thus allow to combine the laser rangefinders 4, 4 'to a complete spatial detection of the passenger compartment.
    Preferably, the control module 2 comprises an image recognition system, for example, with camera sensors 6, 6 'to make a preliminary classification completed by precise distance data provided by laser rangefinders 4, 4 . As the camera sensors are only used for the preliminary classification, that is to say in particular to check whether a seat of the vehicle is occupied or not, it advantageously avoids complicated image analysis processes.
    Figure 3 shows a system 1 according to another embodiment of the invention in a schematic representation; the embodiment is substantially the same as the other embodiments. The figure schematically shows a front view. In the case presented, the vehicle has two front seats, for example, the driver's seat and the passenger seat. Each of the seats is associated with a detection module 3, 3 '. The two detection modules 3, 3' have camera sensors 6, 6 'and, as in the embodiments described above, each detection module 3, 3 'has a laser rangefinder 4, 4' above the respective seat of the vehicle and a laser range finder 4 ", 4 '" upstream of the seat. This makes it possible to determine separately and exactly the position of each passenger.
    Figure 4 shows a system 1 according to another embodiment of the invention with a schematic representation; the embodiment is substantially identical to the other embodiments. However, the two seats are associated with a detection module 3 which comprises a laser rangefinder 4 and two laser sensors 6, 6 '.
    Figure 5 shows a system 1 of another embodiment of the invention in a schematic representation. The embodiment is practically identical to that of the other embodiments, in particular the embodiment described with reference to FIG. 4. Unlike the embodiment of FIG. 4, here, however, the laser range finder 4 is in front of the vehicle seats, for example on the dashboard. Preferably, the laser range finder 4 detects the cabin by surface detection, but in case of appropriate orientation, it can also make a linear detection. For example, it may be sufficient to determine a width profile substantially at the height of the bust of a passenger to conclude with certainty to the presence and / or position of the passenger.
    Figures 6a-6f show systems 1 corresponding to other embodiments of the invention in a schematic representation; the embodiments are substantially the same as the other embodiments. The embodiments of Figures 6a-6f have in common to remove the sensors 6, camera side and to represent the different possibilities of arrangement laser rangefinders 4, 4 'for the detection of the passenger compartment. Under the respective detections is shown, by way of example, the distance profiles as already entered by the device shown.
    Thus, in principle, it is possible for the detection module 3 in the different embodiments to have no pressure sensors (not shown) in the driver's seats, in particular to allow a rough detection of the occupation of the driver. 'a vehicle seat.
    Figure 6a shows a laser rangefinder 4 above a seat, installed to detect a linear depth profile. In FIG. 6b, in a variant or in addition, there is shown a laser rangefinder 4 which is also above a seat, for example, fixed to the roof of the vehicle to take a linear profile of height, that is, ie a distance profile in the transverse direction of the vehicle.
    The embodiment according to FIG. 6c, on the other hand, comprises a first laser rangefinder 4 installed in front of the driver's seat and which establishes a width profile substantially at the passenger's chest height, renewing perpendicularly to the direction of travel while a Another 4 'laser-based telemetry device is located in the area of the vehicle seat bottom in front of it and here the profile of the passengers' legs. This allows, for example, to distinguish a passenger from an object that is on the seat next door because this object has no legs.
    The embodiment of FIG. 6d again includes only a laser range finder 4 which is also above the driver's seat but is combined to establish a linear height profile. It is thus also possible to adapt the vehicle functions to the height profile of the driver, for example, the seat belt system, in particular in the driver's seat belt, or an outside rearview mirror and / or an interior rearview mirror corresponding to the module. 2 not detailed here to determine the height of the passenger from the height of the head obtained in the height profile.
    The system 1 according to Figure 6e shows an embodiment with a laser rangefinder 4 installed in front of the driver's seat with, however, a detection profile X. This allows. This makes it possible to simply establish a profile of height and width and to conclude with the position of the occupants.
    FIG. 6f shows an embodiment which corresponds, for the most part, to that of FIG. 6e and that is why reference will be made to the explanations already given; the laser rangefinder 4 is here in the middle above the driver's seat.
    Figures 7a and 7b show a system 1 corresponding to another embodiment of the invention in a schematic representation. The embodiment is substantially identical to the other embodiments. In particular, the embodiment is that of a method according to the invention for detecting the passenger compartment. We see here a child seat installed on a seat in the opposite direction to the direction of circulation. In Figure 7a the child seat is empty. The laser rangefinder 4 installed above the driver's seat provides a distance profile and the depth profile of the empty child seat, which is only shown schematically in FIG. 7b, schematically shows a child installed on the seat as well as the corresponding depth profiles. The difference of the two depth profiles appears immediately. The operating unit of the control module 2 can recognize this difference and automatically neutralize the airbag in case of an accident, to avoid injuring the child.
    NOMENCLATURE OF THE MAIN ELEMENTS 1 Vehicle interior detection system la, Ib Laser rangefinder 2 Control module 3 Sensor module 4, 4 'Camera sensor 6, 6' Camera sensor 7 Security module
    权利要求:
    Claims (10)
    [1" id="c-fr-0001]
    CLAIMS 1 °) System (1) for detecting the passenger compartment of a vehicle equipped with a seat comprising a control module (2) and at least one detection module (3), the control module (2) operating the data measured by the detection module (3), characterized in that the detection module (3) comprises at least one laser rangefinder (4).
    [0002]
    2) System (1) according to claim 1, characterized in that the laser rangefinder (4) is a laser applying the method of interference by automatic mixing, including a surface emitter with integrated photodiodes.
    [0003]
    3) System (1) according to one of claims 1 and 2, characterized in that the laser rangefinder (4) is configured for point, linear and / or surface telemetry.
    [0004]
    4 °) System (1) according to one of claims 1 to 3, characterized in that the detection module (3) further comprises a pressure sensor and / or weight (5) and / or a sensor of images (6), especially a camera sensor.
    [0005]
    5 °) System (1) according to one of claims 1 to 4, characterized in that a detection module (3) is associated with each seat of the vehicle.
    [0006]
    6 °) System (1) according to one of claims 1 to 5, characterized in that the detection module (3) is at least partially above, below, in front and / or behind the seat.
    [0007]
    7 °) System (1) according to one of claims 1 to 6, characterized in that the detection module (3) monitors the state of charge of the vehicle.
    [0008]
    8 °) System (1) according to one of claims 1 to 7, characterized in that the control module (2) is connected to a security module (7), the control module (2) transmits the data to security module (7), and the data includes information of presence and / or position of a passenger, including information concerning the difference between the position and a predefined target position and / or an object.
    [0009]
    9 °) method for detecting the passenger compartment of a vehicle comprising a system (1) according to any one of claims 1 to 8, the method according to which, in a first step, the detection module (3) measures data, in a second step, the detection module (3) transmits the measured data to the control module (2), in a third step, from the measured data, the control module (2) determines the information concerning the presence and / or the position of a passenger, including information concerning the difference between the position and a predetermined target position and / or an object.
    [0010]
    Method according to claim 9, characterized in that in a fourth step the control module (2) transmits the determined information to a security module (7).
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    法律状态:
    2018-06-25| PLFP| Fee payment|Year of fee payment: 2 |
    2019-10-18| PLSC| Search report ready|Effective date: 20191018 |
    2020-03-13| ST| Notification of lapse|Effective date: 20200206 |
    优先权:
    申请号 | 申请日 | 专利标题
    DE102016210925.1A|DE102016210925A1|2016-06-20|2016-06-20|System and method for interior sensing in a vehicle|
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