• 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:
    A device for shooting (1) a road scene for a motor vehicle, comprises according to the invention at least one camera (2) defining an optical axis, a protection element (4) of the camera and means cleaning (8) of this screen. The protection element surrounds the camera and is rotatably mounted around said camera, having at least two distinct parts each capable of taking a shooting position (16; 116) facing the camera under the camera. effect of rotation. At least one of the distinct parts is a light-transparent screen (18; 118) for being disposed in the shooting position when the camera is in operation, and the cleaning means (8) is arranged on the passage of the camera. mobile protective element for cleaning the transparent screen.
    公开号:FR3027262A1
    申请号:FR1459924
    申请日:2014-10-16
    公开日:2016-04-22
    发明作者:Jean-Franois Rousseau；Vincent Izabel
    申请人:Valeo Systemes dEssuyage SAS；
    IPC主号:
    专利说明:

    [0001] TECHNICAL FIELD The invention relates to the field of driving assistance and especially to cameras installed on certain motor vehicles. BACKGROUND OF THE INVENTION More particularly, the invention relates to a device for shooting a road scene and the means implemented to ensure that the quality of the driver assistance information provided to the driver is optimal. Some motor vehicles are now equipped with shooting means, particularly camera, to help the driver including in his parking maneuvers and / or back. The information provided to the driver is all the more useful when the image acquired by the means of shooting is clear. Whatever the purpose of such a rear vision device, the video camera is usually and very logically implanted at the rear of the vehicle. Thus, it can be integrated directly into the bodywork or into any component making up the rear part of the vehicle, such as for example a bumper, a fin, a tailgate bar, etc. The video camera is also generally mounted in a fixed manner since its positioning, previously mentioned, is in perfect harmony with its function. The implantation of the video camera is commonly carried out so that the end of the lens or the protective screen extends substantially flush with respect to its support element. The proximity of the camera to the outside makes it particularly sensitive to the deposit of dirt, which can penalize the quality of the image acquired by the camera. The document WO 2005/021329 discloses a mobile protective flap in displacement between a closed position and an open position in which the flap is disposed respectively in front of and away from the objective of the camera. The movable protective flap is an insert, which can add to the size depending on the complexity of the drive mechanism, and the only function VVFR2149 2 is to create an opaque screen when the camera is not in operation. Such an arrangement makes it possible to protect the lens, and in particular dirt, when the camera does not have a shooting function. However, it may be noted that dirt can be deposited on the lens when the camera is active and the flap is in the open position. The present invention is in this context and its purpose is to provide a device for shooting a road scene that is particularly effective, that is to say that allows the acquisition of quality images easily used by the electronics on the vehicle to present them optimally to the driver. For this purpose, the invention relates to a camera which comprises at least one camera defining an optical axis, a protective element of the camera which surrounds it and cleaning means. The protective element is rotatably mounted around the camera and has at least two distinct parts each capable of taking a shooting position facing the camera under the effect of the rotation, at least one of the parts distinct being a light-transparent screen capable of being disposed in the shooting position when the camera is in operation. The cleaning means are arranged for cleaning the transparent part on the passage of the movable protection element.
    [0002] By "downstream of the lens" is meant a position in which the movable protective element downstream of the camera on the optical axis is disposed between the camera and the road scene whose camera allows the shooting. The fact of having a protective element surrounding the camera makes it possible to ensure that no dirt directly impacts the camera lens, the latter always being set back from the protection element. And this is advantageously coupled with a rotation of the protection element and an adequate arrangement of the cleaning means on the path of this protection element to ensure that the part of the movable protective element brought to be found next to the camera lens, when a shooting function is requested, is clean.
    [0003] VVFR2149 3 According to characteristics specific to different embodiments of the invention, the movable protection element may be formed by a cylinder made of a material completely transparent to light, possibly made of polycarbonate, or the element of mobile protection may include, in addition to the transparent screen, an opaque obturating zone. The protection element is advantageously rotatably mounted about an axis perpendicular to the optical axis. According to characteristics specific to different embodiments of the invention, provision may be made for the means for rotating the protection element to comprise a motor with a continuous direction of rotation, or for these drive means to comprise a motor with an alternating direction of rotation, driving the protection element in rotation in one direction and then in the other between two extreme positions among which one of the extreme positions corresponds to the shooting position facing the camera.
    [0004] The cleaning means are arranged in a fixed manner relative to the camera, on the passage of the protective element when it is in motion. According to different characteristics, taken alone or in combination, and specific to these cleaning means: they may comprise a nozzle element arranged to project cleaning liquid on the transparent screen in a cleaning zone and a scraper element of said transparent screen; the nozzle element is disposed upstream of the scraper element relative to the direction of rotation of the movable protective element; the cleaning means are carried by an additional casing; and the nozzle element consists of projection nozzles carried by an arm integral with the housing which extends parallel to the axis of rotation of the cylinder; the cleaning means further comprise at least one heating element disposed near the movable protective element; VVFR2149 4 the cleaning means are mounted on the inner face of a vehicle structural element; the scraper element is mounted on the part of the removable structural element and accessible from outside the vehicle.
    [0005] It may be provided that these cleaning means further comprise at least one heating element. The invention also relates to a method for shooting a road scene in a motor vehicle, in which on the one hand the rotation of a movable protective element arranged around a camera for shooting is controlled on the one hand. to bring, when it is desired to carry out a shooting function, a part of the protective element forming a transparent screen in a shooting zone facing the camera, and in which the control is also controlled triggering a cleaning function at the passage of the mobile protective element in a cleaning zone during said rotation of the protection element. According to different characteristics according to the embodiment of the invention, provision may be made for the triggering of a cleaning function to take place after the shooting, or else before it takes place. Other features and advantages of the present invention will appear more clearly with the aid of the description and the drawings, in which: FIG. 1 is a perspective view, seen from the outside of a vehicle, of a device for shot according to a first embodiment, retracted behind a bodywork element, comprising at least one camera surrounded by a protective element, the camera lens being made visible through an orifice of the bodywork; FIG. 2 is a perspective view, from the side, of elements of the camera of FIG. 1, among which is a camera, a movable protection element, and means for driving this object in rotation; mobile protection element; FIG. 3 is a perspective view, from above, of the camera as a whole, comprising the elements of FIG. 2 as well as a scraper element and a nozzle element which are fixed on a bodywork element; FIG. 4 is a perspective view, seen from inside the vehicle, of a detail of the bodywork element, able to receive in particular the scraper element illustrated in FIG. 3; - Figures 5 to 8 illustrate a second embodiment, different in particular from the first embodiment in that the movable protective element comprises an opaque zone (particularly visible in Figures 7 and 8). A shooting device 1 according to the invention, especially for its application on a motor vehicle, comprises, whatever the embodiment chosen, a camera 2 for shooting a road scene extending to proximity of the vehicle, a movable protective element 4 disposed directly in the vicinity of the camera, around it, and able to take at least two distinct positions under the effect of the action of driving means 6, and it further comprises cleaning means 8 whose cleaning action ensures the sharpness of each shot. The shooting device is implanted in a motor vehicle according to the driving assistance function in which the device participates, that is to say it can be implanted for example on the sides of the vehicle for a function. side impact detection, or at the front bumper for a pedestrian impact detection function. Advantageously, the camera is located at the rear of the vehicle to perform a backup camera function, useful in particular for maneuvers in reverse and parking assistance. It is this implantation which will be detailed later, and it will be understood that the orientation VVFR2149 6 different elements of the device with respect to each other depend on this implementation. In the case of implantation towards the front of the vehicle, the different elements would then be in a different orientation without departing from the context of the invention.
    [0006] First of all, a shooting device according to a first embodiment, illustrated in FIGS. 1 to 4, will be described. The camera is implanted in the structure of the vehicle set back from a bodywork element. , for example the rear bumper of the vehicle. An opening 12 is made in the bodywork element to leave the field of the camera free, and a removable area 14 is formed in the bodywork element around this opening, so that it can be removed from the outside. vehicle, with benefits that will be presented later. The camera 2 comprises an optical device, in particular a lens disposed at one end of an objective, for acquiring images of the road scene. The camera is fixedly mounted relative to the vehicle structure, set back from the bodywork element. It is ensured during the installation of the camera, by indexing means for example, that it is oriented correctly so that the lens is arranged opposite the opening 12 of the bodywork element, as shown in Figure 1.
    [0007] The movable protection element 4 has the shape of a cylinder of circular section and is arranged to surround the camera. The movable protective member is rotatably mounted about an axis of rotation perpendicular to the optical axis. The area facing the lens is defined as a shooting area 16, which remains fixed regardless of the angular position of the rotational protection element. This is completely transparent so that the protection screen can be defined as a series of transparent screens 18 able to come successively, under the effect of the rotation of the protection element, to take place in the shooting area to allow to place a screen of dirt protection in front of the camera which by transparency does not interfere with the acquisition of images by the camera. In this embodiment, when the device is mounted VVFR2149 7 on the vehicle, the axis of the cylinder forming the movable protection member extends substantially vertically and parallel to the bodywork element, and the cylinder has at least one opening on the underside to allow passage to the fixing means of the camera on the structural element. The movable protective element is entirely made of a material transparent to light, for example polycarbonate, particularly interesting here for its high transparency for the quality of shooting and its impact resistance for the protection of the camera. The movable protective member is rotatably mounted about the axis of the cylinder, so as to be driven by the drive means 6. For this purpose, the movable protective member comprises a ring gear 20 forming part gear means. The ring gear is here integrally with the movable protective element, when molding it. It is made on the upper end face of the circular wall of the movable protective element, turned towards the inside thereof. To guide the rotation of the movable protection element and support the weight of this element, it is expected to bring the cylinder on an annular guide, here not visible in the figures, formed in the structural element. The drive means 6 comprise a motor 22 and a set of pinions 24. The set of pinions comprises a first pinion and a second pinion integral in rotation, the first pinion being engaged with a rack disposed at the end of a shaft. the second gear is in engagement with the ring gear of the movable protection element, the profile of the teeth of the second gear being complementary to that of the teeth of the crown. The first pinion is rotated by the rack when the engine is controlled ignition and rotation thus generated the second pinion generates a corresponding rotation of the movable protection element. In the illustrated embodiment, the motor 22 is a continuous drive direction motor, i.e. it always rotates in the same direction. The corresponding rotational drive of the movable guard is always in the same direction of rotation.
    [0008] VVFR2149 8 The set of drive means is arranged in the vehicle structure in line with the movable protection element, that is to say in the vertical space of this protection element and the camera. It is understood that this may facilitate the integration of the device in the vehicle structure, but that to adapt to the structure of this or that vehicle, one could provide a different positioning of the drive means with respect to the element of the vehicle. mobile protection, for example by orienting the ring gear to the outside and arranging the drive means on the side. This could furthermore make it possible to provide a movable protection element having an upper transverse wall covering the cylinder to further protect the camera. The cleaning means 8 are mounted on the vehicle structure, here on the inner face of the body member 10, so as to be fixedly on the rotational displacement of the movable protective member. They comprise here a nozzle element 26 and a scraper element 28. The nozzle element 26 comprises a liquid ejection head 30 and a tip 32 for the supply of cleaning liquid. The nozzle element is arranged to be able to project, as the mobile protection element passes, water on a cleaning zone 34 defined upstream, with respect to the direction of rotation of the movable protection element, of the Shooting area 16. The fact that the cleaning area is upstream of the shooting area, relative to the direction of rotation of the movable protective element, means that for a given point on the cylinder of the mobile protective element, during the rotation thereof, said point passes first in the cleaning area and then in the shooting area. It is understood that the cleaning zone is fixed regardless of the position of the movable protective element, and therefore that is watered in this cleaning area different parts of the cylinder of the movable protective element as and when the passage of this element. The scraper element 28 is disposed between the cleaning area and the shooting area. It comprises a rubber blade whose lip is positioned on the generatrix of the cylinder forming the movable protective element, so as to be WFR2149 in contact with the circular wall of the cylinder throughout the rotation thereof. As just described, the scraper element is therefore positioned permanently downstream of the nozzle element, with respect to the direction of rotation of the movable protection element. We will now describe the operation of the device according to the first embodiment as just described, and it will depart from an initial state in which the device is in an active shooting position. The movable protective element has downstream of the lens on the optical axis, that is to say in the field of view, a transparent screen, the transparency 10 in the light of this screen allowing the taking of view without interference. The device remains in its entirety in position, both when shooting and when it is completed. For this purpose, the control module provides a timing instruction in the rotation of the movable protection element. The protection element is made mobile when a new shooting action is detected. It is then desired to carry out, prior to the image acquisition function, a cleaning function so that the portion of the movable element brought to be in the shooting zone after the rotation, that is to say say next to the lens, is clean and does not diminish the quality of acquired images. An operation with a 90 ° rotation of the protection element is arbitrarily chosen to switch from an initial shooting position to a next shooting position. To illustrate the purpose, reference is made in FIG. 3 to four parts regularly cutting off the movable protection element. The first portion 36a is in the figure in the shooting area and the second portion 36b, the third portion 36c and the fourth portion 36d succeed one another in the direction of rotation of the movable guard member. When moving to the next shooting position, the fourth portion 36d is taken up in the shooting area, beforehand through the cleaning zone located upstream relative to the direction of rotation. During this time, each part advances a quarter of a turn towards the shooting area, the first part 36a facing the lens in the initial position being left dirty until it returns to the cleaning. The cleaning function consists mainly of a water ejection instruction in the cleaning zone transmitted to the nozzle element. The portion of the sprinklered movable protection member continues to rotate until it takes a position opposite the lens in the shooting area. In passing, the movable protective member is wiped by contact of the scraper element against the wall of the cylinder, which removes from the circular wall both water and dirt. It is understood that here the triggering of a cleaning function is done before shooting, during the rotation of the movable protective element to bring a new transparent portion facing the lens. Part of the movable protection element retracted behind the bodywork element is rotated to take position in the shooting area. When this part passes beforehand in the cleaning zone, water is ejected by the nozzle and the scraper disposed downstream removes water and dirt. Automatic cleaning cycles or manual cleaning cycles can be provided, and it is possible to couple these two types of cycle. After a number of cleaning cycles, it is possible to remove from the outside of the vehicle the removable portion of the bodywork element and thus have access to the wiper element attached thereto. It can be replaced and ensure for the following cycles that the quality of cleaning remains optimal. A device according to a second embodiment, illustrated in FIGS. 5 to 8, will now be described, and in which, as has been mentioned previously, a camera 2, a movable protection element 4, means 6 and cleaning means 8. It will be understood that the following description of this second embodiment will use the same numerical references for the similar elements, by adding 100 to the reference given for the corresponding element in the first embodiment.
    [0009] WFR2149 11 Here, the camera differs from that previously described in particular structurally at the drive means, the movable protection element and the cleaning means, and it also differs functionally in that the Triggering the cleaning function is performed after shooting. The movable guard member also takes the form of a cylinder which in this embodiment has transverse end walls, one of which carries a shaft for direct drive between the motor 122 and the movable guard member. . The cylinder is here arranged so that the axis of the cylinder, in the assembled position of the device, extends substantially horizontally and parallel to the bodywork element. The circular wall of the cylinder is not entirely of transparent material, but it comprises two distinct parts, namely an opaque screen 38 and a transparent screen 118, arranged successively on the circular wall in the direction of rotation of the element. mobile protection. Thus, in the shooting zone 116 facing the lens, it is possible, depending on the displacement of the movable protection element, to find an opaque part, for aesthetic reasons when it is not desired to take a picture, or a transparent part if on the contrary a shooting of the road scene is requested.
    [0010] It is understood that the camera is protected from dirt both by the opaque portion that the transparent screen of the mobile protection screen. The cleaning means comprise a housing 40 for fixing the gicleig element 126 and the scraper element 128, respectively carried by an arm which extends parallel to the axis of rotation of the cylinder.
    [0011] The scraper element is unchanged, that is to say it consists of a squeegee whose lip is disposed on the generatrix of the cylinder. The nozzle element here consists of a plurality of projection nozzles arranged along the corresponding arm, parallel to the axis of rotation of the cylinder, the nozzles being oriented so that the liquid that they eject meets the VVFR2149 12 cylinder, in a cleaning area as described previously. It can be observed that according to this second embodiment, the cleaning zone is coincident with the shooting zone. Moreover, the cleaning means may comprise on-board defrosting means on one and / or the other of the arms. A heating element is mounted for this purpose near the movable protection element, and this heating element can be controlled by a lighting control module based on temperature information detected and analyzed by the module. The drive means here comprise only a motor in direct drive with the cylinder. They also differ from the first embodiment in that the motor is in the direction of alternating rotation, that is to say capable of passing from a first extreme position to a second extreme position in a given direction of rotation, and then return from the second extreme position to the first extreme position in the opposite direction of rotation.
    [0012] On reading the above structural differences, it can be understood that the operation of the camera according to the second embodiment differs from the operation described above in that the triggering of a cleaning function takes place after the shooting. view, in a cleaning area that is confused with the shooting area. The result, however, is a similar operating principle in that cleaning means arranged on the passage of a mobile protective element of a camera allow the cleaning of a transparent part of said movable protective element so that said cleaned transparent portion can be immediately or later, facing the camera without interfering with the shooting.
    [0013] Of course, various modifications can be made by those skilled in the art to the structures of the camera, since it is possible to ensure by a cleaning as just described, the invention s extending in particular all equivalent means and any technically operative combination of these means.
    权利要求:
    Claims (20)
    [0001]
    REVENDICATIONS1. Device for shooting (1) a road scene for a motor vehicle comprising at least one camera (2) defining an optical axis, characterized in that it also comprises a protection element (4) surrounding the camera, said protection element being rotatably mounted around said camera and having at least two distinct parts (18, 36a to 36d; 118) each capable of taking a shooting position (16; 116) facing the camera under the effect of the rotation, at least one of the distinct parts being a light-transparent screen (18; 118) adapted to be disposed in the shooting position when the camera is in operation, and the recording device view comprises cleaning means (8) of the transparent screen. 15
    [0002]
    2. Shooting device according to claim 1, characterized in that the movable protective element (4) is formed by a cylinder made integrally in a material transparent to light.
    [0003]
    3. Shooting device according to claim 2, characterized in that said cylinder of the movable protective element (4) is made of polycarbonate.
    [0004]
    4. Shooting device according to claim 1, characterized in that the movable protective element (4) comprises, in addition to the transparent screen (118), an opaque shutter area (38). 25
    [0005]
    5. Shooting device according to one of the preceding claims, characterized in that the protective element (4) is rotatably mounted about an axis perpendicular to the optical axis.
    [0006]
    6. Shooting device according to one of the preceding claims, characterized in that the drive means (6) in rotation of the protective element (4) comprise a motor (22) in the direction of continuous rotation.
    [0007]
    Shooting device according to one of Claims 1 to 6, characterized in that the driving means (6) for rotating the protection element (4) comprise a motor (122) in the direction of rotation. alternating, driving the protection element in rotation in one direction and then in the other between two extreme positions among which one of the extreme positions corresponds to the shooting position (116) facing the camera (2).
    [0008]
    Shooting device according to one of the preceding claims, characterized in that the cleaning means (8) are arranged in a fixed manner relative to the camera on the passage of the protective element (4) when he is on the move.
    [0009]
    9. A camera according to claim 8, characterized in that the cleaning means (8) comprise a nozzle element (26; 126) arranged to project cleaning liquid onto the transparent screen (18; passing through a cleaning zone (34) and a scraper element (28; 128) of said transparent screen at the outlet of said cleaning zone.
    [0010]
    10. Shooting device according to claim 9, characterized in that the nozzle element (26; 126) is disposed upstream of the scraper element (28; 128) relative to the direction of rotation of the element. mobile protection (4).
    [0011]
    11. Shooting device according to one of claims 9 or 10, characterized in that the cleaning means (8) are carried by a housing. additional (40) .WFR2149 15
    [0012]
    12. Shooting device according to claim 11, characterized in that the nozzle element (126) consists of projection nozzles carried by an arm integral with the housing (40) which extends parallel to the axis of rotation of the cylinder.
    [0013]
    13. Shooting device according to one of claims 9 or 10, characterized in that the cleaning means (8) are mounted on the inner face of a structural element (10) of the vehicle.
    [0014]
    14. A camera according to claim 13, characterized in that the scraper element (28) is mounted on a portion of the structural element forming a removable zone (14) accessible from outside the vehicle.
    [0015]
    Camera according to one of Claims 9 to 14, characterized in that the cleaning means (8) further comprise at least one heating element arranged close to the movable protective element (4). .
    [0016]
    16. Shooting device according to one of claims 9 to 15, characterized in that the cleaning area (34) is distinct from the shooting area (16) and in that it is arranged in upstream, with respect to the direction of rotation, to said shooting zone.
    [0017]
    17. Shooting device according to one of claims 9 to 15, characterized in that the cleaning area (34) and the shooting area (16) are combined.
    [0018]
    18. A method of shooting a road scene in a motor vehicle, in which on the one hand the rotation of the movable protective element disposed around a camera is controlled to bring into a shooting area facing the camera a part of the protective element forming a transparent screen when it is desired to perform a shooting function, and in which the control of the other hand triggers a function cleaning the passage of the movable protective element in a cleaning zone during said rotation of the protective element.
    [0019]
    19. A method of shooting according to claim 18, characterized in that the triggering of a cleaning function is performed after shooting.
    [0020]
    20. A method of shooting according to claim 18, characterized in that the triggering of a cleaning function is performed before shooting.
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    同族专利:
    公开号 | 公开日
    JP2017532248A|2017-11-02|
    FR3027262B1|2016-11-11|
    US20170244873A1|2017-08-24|
    WO2016058871A1|2016-04-21|
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    DE102020123972A1|2020-09-15|2022-03-17|Bayerische Motoren Werke Aktiengesellschaft|Cleaning device and method for cleaning an optical element with a cleaning device|
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    法律状态:
    2015-11-02| PLFP| Fee payment|Year of fee payment: 2 |
    2016-04-22| PLSC| Publication of the preliminary search report|Effective date: 20160422 |
    2016-10-28| PLFP| Fee payment|Year of fee payment: 3 |
    2017-10-31| PLFP| Fee payment|Year of fee payment: 4 |
    2018-10-30| PLFP| Fee payment|Year of fee payment: 5 |
    2019-10-31| PLFP| Fee payment|Year of fee payment: 6 |
    2021-07-09| ST| Notification of lapse|Effective date: 20210605 |
    优先权:
    申请号 | 申请日 | 专利标题
    FR1459924A|FR3027262B1|2014-10-16|2014-10-16|DEVICE FOR SELECTING A ROAD SCENE FOR A MOTOR VEHICLE|FR1459924A| FR3027262B1|2014-10-16|2014-10-16|DEVICE FOR SELECTING A ROAD SCENE FOR A MOTOR VEHICLE|
    EP15777675.8A| EP3206920B1|2014-10-16|2015-10-07|Device for recording images of a road scene for a motor vehicle|
    US15/517,750| US20170244873A1|2014-10-16|2015-10-07|Device for recording images of a road scene for a motor vehicle|
    PCT/EP2015/073081| WO2016058871A1|2014-10-16|2015-10-07|Device for recording images of a road scene for a motor vehicle|
    JP2017520489A| JP2017532248A|2014-10-16|2015-10-07|Device for recording road condition images for automobiles|
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