• 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:
    The invention relates to an optical detection system (1) for a motor vehicle comprising: - an optical sensor module (3), - a cleaning system (5) of the optical sensor module (3) comprising at least one reservoir main (21) of a washing liquid and at least one projection nozzle (35) of a liquid connected to said main tank (21), characterized in that it comprises an additional reservoir (37) of a liquid of rinsing arranged in parallel with the main reservoir (21) and fluidly connected to said at least one spray nozzle (35).
    公开号:FR3040952A1
    申请号:FR1558566
    申请日:2015-09-14
    公开日:2017-03-17
    发明作者:Frederic Giraud；Giuseppe Grasso；Marcel Trebouet
    申请人:Valeo Systemes dEssuyage SAS；
    IPC主号:
    专利说明:

    Optical detection system for a motor vehicle and method for cleaning the optics of the optical detection system
    The present invention relates to an optical detection system for a motor vehicle and to a method of cleaning the optics of the optical detection system. An optical detection system is any system comprising optical sensors, such as cameras, laser sensors (commonly called LIDARS) or other sensors based on the emission and / or detection of light in the visible or invisible spectrum for humans , especially the infrared.
    Nowadays, especially rear vision cameras equip a large number of the current motor vehicles, and they are part of a parking assistance system that makes it easier to park in a location without turning and to detect the obstacles behind the vehicle.
    Cameras are known which are installed inside the cockpit against the rear window / bezel looking towards the rear from the rear window of the vehicle. These cameras are well protected from external climatic influences and can for example benefit from the defrosting and cleaning systems of the rear window, for example a heating wire integrated in the glass of the rear window.
    However, the angle of view is not optimal, especially for parking assistance and for this reason, it is preferred that the camera is arranged at the rear bumper or at the rear registration plate of the vehicle .
    In this case, the camera is highly exposed to the projections of dirt that can be deposited on its optics and thus reduce its effectiveness, or even make it inoperative.
    Especially in rainy weather, there are projections of rain and dirt that can greatly affect the operability of the optical detection system.
    To counteract the deposition of dirt on the camera, it is known to arrange a device for cleaning the optics of the camera, usually a nozzle of cleaning fluid, close to it, to remove the polluting elements that are deposited over time.
    Similarly, in cold weather, frost may settle on the optics of the camera, making it inoperative.
    A known state of the art is for example represented by the document FR2841488 in which a nozzle projects for example a washing liquid under pressure on a protective glass of the camera. The nozzle is also assisted by means of vibration to remove stubborn dirt from the protective glass of the camera, glass that can be heated to protect against the deposition of frost in cold weather.
    However, it has been found that the operation of this vision system can be optimized. Indeed, after the projection of a washing liquid on the optics of the camera, there may remain drops attached to the protective glass, which damages and deforms the image taken by the camera. The presence of the washing liquid drops results from the fact that the washing liquid does not slip easily on the surface of the optics of the camera. In addition, the evaporation of the drops on the protective glass leaves traces that can be seen on the image taken by the camera.
    Since the cameras used are smaller and smaller, the size of the hooked drops becomes large relative to the surface of the protective glass and can significantly alter the image captured by the camera.
    To solve this problem, the document DE10332939 proposes for example to project a jet of high pressure air on the optics to chase the last drops of water hooked. Nevertheless, this solution requires an additional high-pressure air compressor with a dedicated air filtering system which is complex and expensive. In addition, such a compressor generates noise which can be felt as unpleasant by the passengers of the vehicle.
    The present invention proposes to remedy at least partially one or more of the aforementioned disadvantages by presenting an alternative optical detection system for generally improving the cleaning of the camera subjected to various soils. For this purpose, the subject of the invention is an optical detection system for a motor vehicle comprising: an optical sensor module; a cleaning system for the optical sensor module comprising at least one main reservoir of a liquid washing and at least one liquid projection nozzle connected to said main reservoir, characterized in that it comprises an additional reservoir of a rinsing liquid arranged in parallel with the main reservoir and fluidly connected to said at least one spray nozzle .
    Thanks to the rinsing liquid, a more effective cleaning action of the optics of the optical detection system is obtained and any washing liquid can be evacuated effectively.
    In the case where the rinsing liquid is further heated, the evaporation can be accelerated and the optical detection system is more quickly operational after washing. Moreover, a temperature increase of the rinsing liquid modifies its physical properties and increases its fluidity and therefore its rinsing capacity.
    The optical detection system according to the invention may further comprise one or more of the following characteristics taken alone or in combination:
    The optical sensor module may include a housing, an optical sensor housed in the housing, and an optics disposed in front of the optical sensor and forming at least a wall portion of the housing.
    The rinsing liquid comprises, for example, surfactants or surfactants.
    In one aspect, the optical detection system further comprises an air compressor whose output is also connected via a conduit to said at least one projection nozzle.
    In another aspect, the optical detection system comprises at least one means for heating the rinsing liquid.
    The heating means may be disposed in said additional tank of the rinsing liquid.
    According to a variant, the optical detection system comprises an intermediate reservoir whose inlet is connected to an outlet of said additional tank and an outlet of which is connected to said at least one projection nozzle, the intermediate tank having a smaller size than the tank additional and the heating means is disposed in said additional tank.
    The heating means comprises for example an immersion heater.
    The heating means may be disposed in a fluid conduit connecting the additional reservoir to the at least one spray nozzle.
    The fluidic conduit connecting the additional reservoir to said at least one projection nozzle is for example made of an elastomeric material and comprises at least one resistive wire integrated at least in a longitudinal portion of the elastomeric material of the fluid line and forming the heating means of the liquid flowing in the fluid line. The invention also relates to a method for cleaning the optics of an optical detection system as described above, characterized in that it comprises the following steps: - a washing liquid is sprayed onto the optics of the optical sensor module, and - a rinsing liquid is projected onto the optics of the optical sensor module. Other advantages and characteristics will appear on reading the description of the invention, as well as the appended drawings in which: FIG. 1 shows a simplified diagram of an optical detection system according to a first embodiment; FIG. 2 shows a simplified diagram of an example of a camera module of FIG. 1; FIG. 3 shows a simplified diagram of an optical detection system according to a second embodiment.
    In these figures, the identical elements bear the same reference numbers.
    The following achievements are examples. Although the description refers to one or more embodiments, this does not necessarily mean that each reference relates to the same embodiment, or that the features apply only to a single embodiment. Simple features of different embodiments may also be combined to provide other embodiments.
    In the description, the terms "upstream" and "downstream" are used with respect to the flow direction of the fluids in the fluid lines. Thus, a first element is disposed upstream of a second element if the fluid first passes through the first element and then through the second element.
    FIG. 1 shows a first embodiment of an optical detection system 1 according to the invention for a motor vehicle.
    The optical detection system 1 is for example intended to be mounted at the rear of a motor vehicle, for example at a bumper or a license plate (not shown). It can also for example be mounted on the sides of the vehicle, for example to replace side mirrors.
    The optical detection system 1 comprises an optical sensor module 3, in particular a camera and a cleaning system 5 of the optics of the optical sensor module 3.
    As can be seen in FIG. 2, the optical sensor module 3, for example a camera module, comprises a housing 7, an optical sensor 9, in particular an image sensor, housed in the housing 7 and an optic 11, in particular a protective window 12, arranged in front of the sensor 9 and forming at least one wall portion of the housing 7.
    The housing 7 hermetically and sealingly encloses the optical sensor 9. To better illustrate the structure of the optical sensor module 3, only the protective glass 12 and the side walls 13 have been shown. The lower wall of the housing 7 has not been shown to better represent the inside of the module 3 with the optical sensor 9.
    The protective glass 11 may be made of glass or crystal polycarbonate.
    The optical sensor 9 is for example a CCD sensor (for "coupled coupled device" or a charge coupled device) or a CMOS sensor composed of a matrix of miniature photodiodes. According to another variant, it may be a LIDAR sensor. Optics 11 includes, for example, a convex lens 15 (convex) such as fish-eye optics.
    In general, the optic 11 comprises any optical element such as, for example, the protective glass 12 and the lens 15, placed in front of the sensor 9. Under certain conditions, there is no protective glass and this function is ensured. by the lens 15 sealingly attached to the housing 7.
    The optical sensor 9 is installed in the module 3 so as to aim through said protective window 12.
    As seen in FIG. 1, the cleaning system 5 comprises at least one main reservoir 21 of a washing liquid. By washing liquid is meant for example a mixture of solvents, surfactants, dyes and / or perfume
    The main tank 21 also has a washing pump 23 for discharging the washing liquid to an outlet which is connected to a pipe 27, for example a rubber tube, in which a non-return valve 29 is arranged.
    Preferably, the main reservoir 21 is the washing liquid reservoir which is also used for cleaning the windshield and the rear window of the vehicle. In this case, provision is made for the use of a controlled solenoid valve (not shown) which makes it possible to direct the washing liquid either towards the windshield, towards the rear window or towards the optical sensor module 3.
    Line 27 is connected to an input of a three-way connector 31 whose output is connected to a branch line 33 connected to the optical sensor module 3, and more specifically to at least one projection nozzle 35, in this case a ramp 36 comprising five spray nozzles 35.
    The cleaning system 5 further comprises an additional reservoir 37 of a rinsing liquid. The rinse liquid comprises surfactants or surfactants which decrease the adhesion force of the water on the glass surface. It allows the evacuation of drops of water without leaving traces.
    The additional reservoir 37 is arranged in parallel with the main reservoir 21 and connected via a pipe 39 in which a non-return valve 41 is arranged at an inlet of the three-way connector 31 and is therefore also connected to the projection nozzles 35. The additional reservoir 37 also has a pump 42 for spraying the rinsing liquid through the spray nozzles 35.
    Thus, by projecting, after the projection of a washing liquid, a rinsing liquid, the remains of the washing liquid, traces and drops are removed. The projection of the rinsing liquid ensures a clean surface of the protective glass 11 and make the optical sensor module 3 quickly operational.
    As can be seen in FIG. 1, optionally, the cleaning system 5 may further comprise an air compressor 43, the outlet of which is also connected via a pipe 45 in which a non-return valve 47 is disposed at a pressure input of the three-way connector 31 and is therefore also connected to the spray nozzles 35. In this case, the compressor 43 can be small or very small, which limits its cost and the noise it can generate. Indeed, its function is more to blow air on the glass to accelerate the evaporation of the rinsing liquid and not to drive drops on the protective glass 12.
    According to another optional variant, provision is made to equip the optical detection system 1 with at least one heating means 51 of the rinsing liquid.
    According to the embodiment of Figure 1, the heating means 51 is for example disposed in the fluid line 39 or at least in a section thereof.
    In this case, the fluidic conduit 39 is for example, as shown schematically in FIG. 1, made of an elastomeric material and comprises at least one resistive wire, integrated at least in a longitudinal portion of the elastomeric material of the fluidic conduit 39 and forming the heating means 51 of the rinsing liquid.
    Heating the rinsing liquid optimizes its chemical properties, especially its ability to slide on the glass and promote the evaporation of the rinsing liquid.
    According to an embodiment not shown, it is also possible to heat the rinsing liquid by placing an immersion heater as heating means directly in the additional tank 37.
    FIG. 3 shows yet another embodiment which differs from that of FIG. 1 by the heating means 51.
    Indeed, in this embodiment is provided an intermediate tank 53, an inlet is connected to an outlet of said additional tank 37 and an output of which is connected to the three-way connector 31 and therefore to the spray nozzles 35. The intermediate tank 53 has a smaller size than the additional tank 37 so that the amount of liquid to be heated is more limited and the heating means 51, for example an immersion heater or a heating ceramic is disposed in said additional tank 53. This reduces the consumption of 'electric energy.
    The optical detection system 1 is cleaned according to the following method: In a first step, a washing liquid is sprayed onto the optics of the optical sensor module 3 to remove all the dirt from the protective glass 12. Then, according to a second step, a rinsing liquid is sprayed onto the protective glass 12 to remove the remaining drops of the washing liquid. To optimize its action, the rinsing liquid may be heated for example at a temperature between 60 ° C and 80 ° C.
    Optionally, it is possible in a third step to blow air on the protective glass 12 to accelerate the evaporation of the rinsing liquid.
    权利要求:
    Claims (10)
    [1" id="c-fr-0001]
    An optical detection system (1) for a motor vehicle comprising: - an optical sensor module (3), - a cleaning system (5) of the optical sensor module (3) comprising at least one main reservoir (21). ) a washing liquid and at least one spray nozzle (35) of a liquid connected to said main tank (21), characterized in that it comprises an additional reservoir (37) of a rinsing liquid disposed in parallel to the main reservoir (21) and fluidly connected to the at least one projection nozzle (35).
    [2" id="c-fr-0002]
    2. Optical detection system according to claim 1, characterized in that the rinsing liquid comprises surfactants or surfactants.
    [3" id="c-fr-0003]
    3. optical detection system according to claim 1 or 2, characterized in that it further comprises an air compressor (43) whose output is also connected via a pipe (45) to said at least one projection nozzle (35).
    [4" id="c-fr-0004]
    4. optical detection system according to any one of claims 1 to 3, characterized in that it comprises at least one heating means (51) of the rinsing liquid.
    [5" id="c-fr-0005]
    5. optical detection system according to claim 4, characterized in that the heating means (51) is disposed in said additional tank (37) of the rinsing liquid.
    [6" id="c-fr-0006]
    6. An optical detection system according to claim 4, characterized in that it comprises an intermediate reservoir (53) having an inlet connected to an outlet of said additional reservoir (37) and an outlet of which is connected to said at least one nozzle projection device (35), the intermediate tank (53) having a smaller size than the additional tank (37) and in that the heating means (51) is disposed in said additional tank.
    [7" id="c-fr-0007]
    7. optical detection system according to any one of claims 4 to 6, characterized in that the heating means (51) comprises an immersion heater.
    [8" id="c-fr-0008]
    8. optical detection system according to claim 4, characterized in that the heating means (51) is disposed in a fluid line (39) connecting the additional reservoir (37) to said at least one spray nozzle (35).
    [9" id="c-fr-0009]
    Optical detection system according to claim 8, characterized in that the fluid line (39) connecting the additional reservoir (37) to the at least one spray nozzle (35) is made of an elastomeric material and comprises at least one resistive wire integrated at least in a longitudinal portion of the elastomeric material of the fluid line (39) and forming the heating means (51) of the liquid flowing in the fluid line (39).
    [10" id="c-fr-0010]
    10. A method of cleaning the optics of an optical detection system according to any one of claims 1 to 9, characterized in that it comprises the following steps: - one projects a washing liquid on the optics of the optical sensor module (3), and - a rinsing liquid is projected onto the optics of the optical sensor module (3).
    类似技术:
    公开号 | 公开日 | 专利标题
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    EP3404481B1|2021-07-21|Device for protecting an optical sensor and associated driving-assistance system
    WO2016116568A1|2016-07-28|Rear view system and method for operating the system
    EP3002169B1|2019-10-30|Windscreen-wiper blade, system and method for wiping a glass surface of a motor vehicle
    FR3066621A1|2018-11-23|OPTICAL SENSOR PROTECTION DEVICE, DRIVING ASSISTANCE SYSTEM AND CORRESPONDING ASSEMBLY METHOD
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    WO2020064881A1|2020-04-02|Motor vehicle driver assistance system
    FR3013288A1|2015-05-22|WIPER BLADE OF A GLASS OF A VEHICLE
    WO2016119974A1|2016-08-04|Fluid distribution valve for a vehicle washer fluid distribution system
    FR3016590A1|2015-07-24|LIQUID CONDUIT DEVICE MASK FOR WINDOW WASH
    WO2020126299A1|2020-06-25|Wiper system for a rear window, having a sprayer device
    FR3097061A1|2020-12-11|Lidar
    FR3048665A1|2017-09-15|DEVICE FOR CLEANING AN OPTICAL SENSOR AND OPTICAL SENSING SYSTEM FOR AN ASSOCIATED MOTOR VEHICLE
    FR3083762A1|2020-01-17|SYSTEM FOR CLEANING OPTICAL SURFACES OF A MOTOR VEHICLE
    同族专利:
    公开号 | 公开日
    JP2018528898A|2018-10-04|
    WO2017045832A1|2017-03-23|
    US20180272999A1|2018-09-27|
    EP3350032A1|2018-07-25|
    FR3040952B1|2017-09-08|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    EP0148716A2|1984-01-11|1985-07-17|François Hueber|Windscreen-washer with two liquid tanks|
    DE3803491A1|1988-02-05|1989-08-17|Ernst Heiberger|Method and device for cleaning the windscreen of motor vehicles|
    DE102007046121A1|2007-09-27|2009-04-02|GM Global Technology Operations, Inc., Detroit|Device for supplying different liquids to transparent parts of transport unit, particularly motor vehicle, has storage tank for liquid, pump and outlet|
    US20120117745A1|2009-09-29|2012-05-17|Denso Corporation|On-board optical sensor cover and on-board optical sensor apparatus|
    US20130048036A1|2011-08-29|2013-02-28|Raytheon Company|Aperture Cleaning System and Methods of Use|
    EP2873570A1|2012-07-11|2015-05-20|Nissan Motor Co., Ltd|Vehicle-mounted-camera cleaning device|
    FR2841488B1|2002-06-27|2004-09-10|Valeo Systemes Dessuyage|DETECTION DEVICE COMPRISING MEANS FOR CLEANING A TRANSPARENT WINDOW BY SPRAYING A LIQUID UNDER PRESSURE AND BY VIBRATION OF THE WINDOW|
    DE10332939B4|2003-07-19|2011-08-11|MAN Truck & Bus AG, 80995|Device for cleaning a front area in front of a distance sensor installed in a motor vehicle|US10350647B2|2011-03-10|2019-07-16|Dlhbowles, Inc.|Integrated automotive system, nozzle assembly and remote control method for cleaning an image sensor's exterior or objective lens surface|
    US10432827B2|2011-03-10|2019-10-01|Dlhbowles, Inc.|Integrated automotive system, nozzle assembly and remote control method for cleaning an image sensors exterior or objective lens surface|
    CA2982271C|2014-04-11|2021-08-24|Russell Hester|Integrated automotive system, compact, low-profile nozzle assembly and compact fluidic circuit for cleaning a wide-angle image sensor's exterior surface|
    US10525937B2|2014-04-16|2020-01-07|Dlhbowles, Inc.|Integrated multi image sensor and lens washing nozzle assembly and method for simultaneously cleaning a plurality of image sensors|
    US10773273B2|2018-01-31|2020-09-15|Ford Global Technologies, Llc|Sensor washer system with annular nozzle assembly|
    DE102018220783A1|2018-12-03|2020-06-04|Robert Bosch Gmbh|Assembly for cleaning a lens|
    DE102019111468A1|2019-05-03|2020-11-05|Wabco Gmbh|Cleaning device, compressed air system and cleaning method for applying a medium pulse to a surface as well as the corresponding control system and vehicle|
    DE102019111469A1|2019-05-03|2020-11-05|Wabco Gmbh|Cleaning device for applying a medium pulse to a surface according to the Venturi principle, compressed air system, cleaning process, control system and vehicle|
    US11247644B2|2019-08-30|2022-02-15|Ford Global Technologies, Llc|Vehicle sensor cleaning with additives|
    FR3100776B1|2019-09-16|2021-08-20|Valeo Systemes Dessuyage|CLEANING PROCEDURE FOR A GLASS SURFACE OF A VEHICLE|
    法律状态:
    2016-09-28| PLFP| Fee payment|Year of fee payment: 2 |
    2017-03-17| PLSC| Search report ready|Effective date: 20170317 |
    2017-09-29| PLFP| Fee payment|Year of fee payment: 3 |
    2018-09-28| PLFP| Fee payment|Year of fee payment: 4 |
    2019-09-30| PLFP| Fee payment|Year of fee payment: 5 |
    2021-06-11| ST| Notification of lapse|Effective date: 20210506 |
    优先权:
    申请号 | 申请日 | 专利标题
    FR1558566A|FR3040952B1|2015-09-14|2015-09-14|OPTICAL DETECTION SYSTEM FOR A MOTOR VEHICLE AND METHOD OF CLEANING THE OPTICAL OF THE OPTICAL DETECTION SYSTEM|FR1558566A| FR3040952B1|2015-09-14|2015-09-14|OPTICAL DETECTION SYSTEM FOR A MOTOR VEHICLE AND METHOD OF CLEANING THE OPTICAL OF THE OPTICAL DETECTION SYSTEM|
    PCT/EP2016/068364| WO2017045832A1|2015-09-14|2016-08-02|Optical detection system for motor vehicle and method for cleaning the lens of the optical detection system|
    EP16745746.4A| EP3350032A1|2015-09-14|2016-08-02|Optical detection system for motor vehicle and method for cleaning the lens of the optical detection system|
    US15/760,163| US20180272999A1|2015-09-14|2016-08-02|Optical detection system for motor vehicle and method for cleaning the lens of the optical detection system|
    JP2018513672A| JP2018528898A|2015-09-14|2016-08-02|Optical detection system for automobile and method for cleaning lens of optical detection system|
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