• 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 cleaning a lens (8) of a camera (2) of a motor vehicle, adapted to take pictures along a longitudinal optical axis, comprises a cleaning head (4), arranged in a fixed position by relative to the camera (2) so that a portion of the head carrying cleaning means (20, 36) is disposed along the optical axis downstream of the lens. The invention is particularly applicable in the cleaning of rear view cameras, arranged at the rear of the vehicle and oriented to take views of a road scene extending to the rear of the vehicle.
    公开号:FR3027007A1
    申请号:FR1459715
    申请日:2014-10-10
    公开日:2016-04-15
    发明作者:Jean-Franois Rousseau
    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 in particular to cameras installed on certain vehicles. More particularly, the invention relates to a device for cleaning such a driving aid camera so that the quality of the 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. The present invention is in this context and its purpose is to provide a device for cleaning cameras that is particularly effective.
    [0002] For this purpose, the subject of the invention is a device for cleaning a camera lens of a motor vehicle adapted to take pictures along a longitudinal optical axis, and in which a head carrying cleaning means is provided. disposed at least partially around the camera and arranged so that a portion of the head is disposed along the optical axis downstream of the lens, in a fixed position relative to the camera, and preferably out of the field of view. the camera. By "downstream of the lens" is meant a position in which the part of the head downstream of the lens on the optical axis is arranged between the lens and the road scene whose lens participates in the shooting. Furthermore, it is understood by a position "out of camera field" of the cleaning device that the portion of the cleaning device disposed downstream of the lens does not interfere with the shooting by the camera of the scene element directly to the vehicle, so that the driver assistance information that is given to the driver is reliable and useful, especially since it is particularly clear thanks to the regular use of cleaning means according to the invention. The fact that the cleaning head is fixed relative to the camera simplifies the structure of the cleaning device which has no moving element.
    [0003] The size of the cleaning device is thus easy to take into account in the implementation of the device in a motor vehicle, and the simplicity of manufacture as well as the reliability over time of the device are improved compared to existing systems. According to features of a preferred embodiment of the invention, the lens is carried by a lens of circular section and the carrying head cleaning means has a generally annular shape complementary to the shape of the circular lens , so that it can be arranged around the lens. The carrying head of the cleaning means is arranged with respect to the objective of the camera so that the axis defining longitudinally the head is coincident with an axis of the camera, and in particular the optical axis defined by the lens. The head further comprises an inner annular wall carrying cleaning means and arranged so that said cleaning means are oriented towards the lens. It may also be provided that the carrying head of the cleaning means comprises at least two differentiable parts, among which a first annular portion, forming a base and having dimensions able to be arranged around the objective of the camera, and a second part forming a support of the cleaning means. The second part is arranged so that the cleaning means are arranged longitudinally downstream of the lens and directed towards it. According to a set of characteristics specific to a particular embodiment of the invention, taken alone or in combination, the cleaning means carried by the head consist of jet-type projection means capable of projecting a cleaning liquid onto the nozzle. lens. The inner annular wall of the head can then be provided with a plurality of projection nozzles 3027007 WFR2144 3 forming the nozzle-type means and through which a cleaning liquid is able to exit in the direction of the lens. In this case it may be provided that the cleaning head further comprises an internal liquid circulation duct arranged in the thickness of the head to serve each nozzle and connected to at least one water inlet pipe. A particular arrangement of the device in this first embodiment is such that the inner annular wall is parallel to the axis of the annular head, the nozzles being formed by a bore opening on the inner annular wall and extending from the inner conduit liquid flow, each bore being inclined with respect to the normal to the inner annular wall towards the portion of the head disposed around the lens to allow the ejection of liquid towards the lens arranged longitudinally upstream said nozzles. It may further be provided that the cleaning head comprises two diametrically opposed water inlets and that, in combination or not, the cleaning head 15 has a discharge slot extending radially from the inner wall towards the outside of the housing. the head, said slot being arranged vertically down the head in the fixed position of the head relative to the camera. According to a set of characteristics specific to a particular embodiment of the invention, taken alone or in combination, the cleaning means carried by the head consist of thawing means of the lens. In this case it is provided that the defrosting means may consist of a heating element disposed on the inner wall of the head, and that this heating element may consist of a ring disposed around the entire periphery of the inner wall. The heating element can be glued to the inner wall, or molded with the inner wall. It will be provided that the head may comprise an orifice adapted to receive a control cable for transmitting the control instructions of these defrosting means. Furthermore, the characteristics of the two embodiments can be combined so that the cleaning means carried by the head consist of projection nozzles and heating elements arranged distinctly on the inner annular wall of the head. More particularly, the 3027007 WFR2144 4 projection nozzles and the heating elements, welded or glued, are arranged alternately all around the annular wall of the head. The invention also relates to a motor vehicle comprising a device for cleaning a camera as just described above.
    [0004] In a preferred embodiment of the invention, the camera capable of being cleaned by said cleaning device is a rear view camera, disposed at the rear of the vehicle and oriented to take views of a road scene. extending to the rear of the vehicle. The invention thus finds a particularly advantageous, but not exclusive, application in the field of parking assistance for motor vehicles. It can be advantageously provided that the cleaning head is made fixed with respect to the structure of the motor vehicle, so as to be substantially flush with respect to the outer body of the vehicle, the camera being made movable between a passive position set back from the cleaning head and an active shooting position in which the lens disposed at the end of the camera is also flush with the outer body. Other features and advantages of the present invention will become more apparent from the description and the drawings, of which: FIG. 1 is a perspective view, three quarter front view, of a cleaning device according to a first embodiment of the invention, in an exploded representation of the cleaning head and the camera; FIG. 2 is a perspective view, three quarter front view, of the cleaning device of FIG. 1, this time in an assembled representation; FIG. 3 is a view in longitudinal section of the device of FIG. 2; - Figure 4 is a perspective view, from above, of a cleaning device according to a variant of the first embodiment; FIG. 5 is a perspective view, three quarter front view, of a cleaning device according to a second embodiment of the invention, in an assembled representation, the second embodiment differing in particular from the first embodiment. embodiment in that the cleaning means 5 carried by the head are here heating means rather than projection means; FIG. 6 is a view in longitudinal section of the device of FIG. 5. A cleaning device 1 according to the invention comprises in particular a camera 2 and a head 4 carrying cleaning means 6, these two elements being the camera. and the head being fixed relative to each other. The camera 2 forms means of shooting a road scene located indifferently around the vehicle, and advantageously behind the vehicle to give information to the driver when it recedes.
    [0005] The reversing camera 2 is fixed in a structural element of the vehicle, for example near the rear bumper. It comprises at a longitudinal end, here facing the rear of the vehicle, a lens 7 having the shape of a cylinder of circular section and which has at its free end a lens 8, which should be cleaned at a given periodicity , or before each use of the reversing camera. It is advantageous to provide that the camera and the cleaning head are located in the structure of the motor vehicle so that the end of the camera allowing the shooting is arranged as close as possible to the outer body of the vehicle in order to acquire images of the widest possible road scene.
    [0006] The head 4 carrying the cleaning means comprises at least a first annular portion 10, forming a base and whose internal diameter is substantially greater than the outer diameter of the lens 7, and a second portion 12 also annular, forming a support. cleaning means and here having a diameter slightly less than that of the base 10. When the head 30 is fixedly mounted around the lens, the first part is arranged around the lens and the second part is arranged longitudinally downstream of the lens. The cleaning means are oriented towards the lens. The second portion 12 of the head, forming a support cleaning means, is delimited longitudinally at one end by a distal end face 14 5 facing the outside of the vehicle. The distal end face 14 is here represented flat but it is understood that it may have a different shape, in particular to adapt to the bulk of the vehicle structure around the camera and to come flush with the outer bodywork of the vehicle. vehicle. The second portion 12 is delimited further, transversely, by an inner annular wall 16, directly adjacent the lens. In the various embodiments illustrated, it is observed that it is the inner annular wall 16 which carries the cleaning means of the lens, while the control means of these cleaning means are connected to the outside of the cleaning head.
    [0007] As previously described, the carrier head 4 of the cleaning means is made fixed with respect to the camera. Cooperating fixing means may be provided between the camera and the cleaning head, for example by a clamping screw 18 visible in FIG. 4. It will also be possible to fix the head 4 to a structural element of the vehicle, advantageously the same as that on which 20 is fixed the camera 2. It is understood that in the assembled position of the head and the camera, it is important on the one hand that the cleaning means are oriented towards the lens to have effect on it when they are controlled ignition, and it is important on the other hand that these cleaning means and the inner annular wall 16 which carries them are not in the field of the camera.
    [0008] It is possible to define a position of the head relative to the camera which is in accordance with the position desired by the invention with reference to FIG. 3 in particular. In a projection in a vertical and transverse plane, perpendicular to the optical axis, referenced "P" in Figure 3, the inner annular wall surrounds the lens, while longitudinally, the inner annular wall 3027007 WFR2144 7 is substantially flush with the lens, downstream from the latter, that is to say between the lens and the road scene filmed by the camera. According to various embodiments, of which two are shown by way of example hereinafter, the type of cleaning means and the inclination of the inner annular wall which carries them for the proper impact of the action of the cleaning means on the lens. In a first embodiment, illustrated in particular in FIGS. 1 to 4, the cleaning means carried by the internal annular wall 16 of the head consist of projection means 20, of the nozzle type, capable of projecting onto the lens a fluid which may be in particular cleaning liquid or air under pressure. The head 4 then comprises a collar 22 extending longitudinally astride the first and the second part and inside which is hollowed an internal conduit 24 for circulating the fluid which extends annularly in the thickness of 15 around the axis of the head. The duct is arranged so that on the one hand at least one external radial bore 26 on which a water inlet pipe 28 is connected, via a boss 29 projecting from the collar allowing the connection of the without the latter resting on the cleaning head, and on the other hand a plurality of internal radial bores 30 opening outwards on the inner annular wall and thus forming on this inner annular wall 16 of the head a plurality of nozzles 32 forming the nozzle-type projection means. The cleaning liquid, or air, is able to exit through these nozzles in the direction of the lens. The spray nozzles 32 are advantageously arranged all around the circumference of the head. Provision is made a regular arrangement of these nozzles, the number of nozzles and the spacing between each nozzle being left to the discretion of the manufacturer. The nozzles are disposed on the inner annular wall 16 in a circle around the axis of the cleaning head, and the nozzles 32 and the inner annular wall 16 are arranged such that the nozzles are oriented to eject the liquid 30 in a manner that transverse component towards the inside of the head, that is to say in the direction of the axis of the annular cleaning head, and in a longitudinal component towards the first part of the cleaning head forming a base. According to the illustrated embodiment, the inner annular wall is parallel to the axis of the annular head and the inner radial bores which form the nozzles are inclined normal to the inner annular wall towards the base of the annular wall. head disposed around the lens to allow ejection of liquid into the interior of the head and towards the first base portion of the head, so that the ejected liquid contacts the longitudinally arranged lens upstream of said nozzles.
    [0009] In a variant, illustrated in FIG. 4, it can be provided that the cleaning head comprises two cleaning liquid supply pipes connected to the inner pipe respectively by an external radial bore, the inlet pipes being here diametrically opposed. It is understood that without departing from the context of the invention, the number of cleaning fluid inlet pipes and their arrangement can be different, and that one can have both a single arrival pipe and a multitude . The cleaning liquid supply pipes are connected at their opposite end to a source of liquid pressurized by a pump-type device to allow the arrival of liquid with sufficient pressure to be projected by the spray nozzles. It will be understood that, alternatively, the pipes and the circulation duct inside the cleaning head could allow, in place of the circulation of a cleaning fluid, the circulation of air under pressure so that the projection nozzles allow the ejection of air whose breath allows to chase the dirt present on the lens. The cleaning head further includes a discharge slot 34 extending radially from the inner wall to the outside of the head. This slot is particularly useful for the gravity evacuation of dirt removed from the lens and the cleaning liquid when such liquid is sprayed by the cleaning means. For this purpose, the cleaning head should be arranged with respect to the vehicle structure so that the slot is arranged vertically under the head, as can be seen in FIGS. 1, 2 and 4.
    [0010] In a second embodiment, illustrated in FIGS. 5 and 6, the cleaning means carried by the head consist of thawing means 36 of the lens, and more particularly of a heating element disposed on the inner annular wall. 16 of the cleaning head.
    [0011] The heating element must be flexible to follow the curvature of the inner annular wall and it may be conventionally constituted by a high resistivity electric wire embedded in a flexible plate, the temperature rise of the wire being controlled by a control instruction. command generated by the control module associated with the cleaning device.
    [0012] It can be provided that this heating element takes the form of a ring disposed around the entire periphery of the inner wall, but it will be understood that, in a variant, and in particular in the case of a combination of the two embodiments such as they are shown separately in the description, the heating element may be arranged discontinuously on the periphery of the inner wall, piece by piece. In both cases, the heating element forming the defrosting means 36 may be glued to the inner annular wall 16 in a step of implementation subsequent to the manufacture of the cleaning head, or be incorporated in the inner annular wall. when molding the cleaning head. In this second embodiment, an inner duct is also formed in the thickness of the cleaning head, so as to allow the passage of cables from the outside of the device to the inner annular wall and the heating element. control 38 of said defrosting means, connected at their opposite end to actuators not shown here and controlled by the control module.
    [0013] We will now describe the operation of the cleaning device according to the invention, based in particular on Figures 1 to 4 illustrating the first embodiment. It will be understood that the general operating principle of the device does not differ according to whether one has a device corresponding to the first or second embodiment, since the camera and the cleaning head 30 remain fixed.
    [0014] The cleaning head 4 is fixed relative to the camera, and to the lens 8, so as not to be in the field of view of the camera. The head does not interfere with the quality of shooting and driver assistance. When a situation is detected in which the reversing camera will potentially be used, for example when the clutch is engaged, or when the previously defined cleaning period comes to term, a control module generates a cleaning instruction. here, a supply of cleaning liquid from the internal circuit of the cleaning head via one or more inlet pipes.
    [0015] The pressurized cleaning liquid in the inlet pipe extends into the internal circuit to lead to each of the cleaning nozzles. The orientation of the bore defining each of the nozzles ejects the liquid upstream of the cleaning head relative to the optical axis and centrally on this optical axis so as to sprinkle the lens abundantly. The cleaning liquid is then removed by gravity at the radially formed slot in the thickness of the cleaning head, and this liquid discharge is accompanied by the removal of dirt originally present on the lens. It is understood that features of the cleaning device according to the second embodiment could be taken in combination with features of the cleaning device according to the first embodiment. It would thus be possible for thawing means, in particular heating partial elements, to be glued between two projection nozzles, and for the control module associated with the cleaning device to be able to generate this or that control instruction, ie that is, a cleaning liquid injection instruction in the water supply pipes or an electrical control instruction for raising the temperature of the heating partial elements, according to the detected information such as the outside temperature for example. The control instructions can be generated simultaneously, to achieve at the same time a defrosting and a projection towards the lens, especially if the projected fluid is air and not liquid as described above, or they can be generated offset.
    [0016] It will be understood that such a combination may be advantageous in that the heating element attached to the inner wall between the spray nozzles can serve as a means of thawing the lens as described previously, but also means for heating the spray nozzles itself to avoid gel formation at the outlet of these nozzles. The foregoing description clearly explains how the invention makes it possible to achieve the objectives that it has set itself, and in particular to propose a cleaning device in which a head is able to clean a camera lens, notably a lens, without on the one hand require additional drive means 10 for moving said cleaning head to an active cleaning position of the lens and without the cleaning head being in the field of the camera and inconvenient the shooting. Of course, various modifications can be made by those skilled in the art to the structures of the cleaning device, since it is possible to ensure cleaning of the camera lens with a cleaning head which remains permanently in position. downstream of the lens relative to the optical axis, but without being in the field of the camera through dimensions to surround the lens. Such a combination of features makes it possible to ensure cleaning of the lens with a non-moving and therefore reliable mechanism, but whose permanent position is not detrimental to the shooting and driving assistance provided to the driver. Embodiments which have been described in detail above are not limiting of the invention. In any event, the invention can not be limited to the embodiments specifically described in this document, and extends in particular to all equivalent means and to any technically operating combination of these means.
    权利要求:
    Claims (19)
    [0001]
    REVENDICATIONS1. Device for cleaning (1) a lens (8) of a camera (2) of a motor vehicle adapted to take pictures along a longitudinal optical axis, characterized in that it comprises a cleaning head (4) disposed in a fixed position relative to the camera (2) so that a portion of the head carrying cleaning means (20, 36) is disposed along the optical axis downstream of the lens.
    [0002]
    2. Cleaning device according to claim 1, characterized in that the lens (8) is carried by a lens (7) of circular section and in that the cleaning head (4) has a generally annular shape, axis coincident with the axis of the objective and the lens, said cleaning head having an inner annular wall (16) carrying said cleaning means (20, 36), said annular wall being disposed along the optical axis downstream of the lens and arranged so that said cleaning means is oriented towards the lens.
    [0003]
    Cleaning device according to claim 2, characterized in that the cleaning head (4) comprises at least a first annular portion (10), forming a base and having dimensions adapted to be arranged around the objective (7). of the camera (2), and a second portion (12) forming a support of the cleaning means (20, 36), said second portion being arranged so that said cleaning means are arranged along the optical axis downstream of the lens (8) and oriented thereto.
    [0004]
    4. Cleaning device according to one of claims 2 to 3, characterized in that the cleaning means carried by the head (4) consist of projection means (20) of a fluid, in particular a cleaning fluid or pressurized air on the lens (7). 3027007 WFR2144 13
    [0005]
    5. Cleaning device according to claim 4, characterized in that the inner annular wall (16) of the head (4) is provided with a plurality of nozzles (32) forming the projection means (20) and through which a cleaning liquid 5 is able to exit in the direction of the lens (7), said cleaning head further comprising an internal liquid circulation duct (24) arranged in the thickness of the head to serve each nozzle and connected to least one water inlet pipe (28). 10
    [0006]
    6. Cleaning device according to claim 5, characterized in that said inner annular wall (16) is parallel to the axis of the head (4), the nozzles (32) being formed by a bore (30) opening on the inner annular wall and extending from the inner liquid flow conduit (24), each bore being inclined with respect to the normal to the inner annular wall towards the portion of the head disposed around the lens to allow the ejection of liquid towards the lens (7) arranged longitudinally upstream of said nozzles.
    [0007]
    7. Cleaning device according to one of claims 5 or 6, characterized in that the cleaning head (4) has two diametrically opposed water inlets.
    [0008]
    8. Cleaning device according to one of claims 4 to 7, characterized in that the cleaning head (4) has a discharge slot (34) extending radially from the inner annular wall (16) to the outside the head, said slot being arranged vertically down the head in the fixed position of the head relative to the camera (2).
    [0009]
    9. Cleaning device according to one of claims 2 or 3, characterized in that the cleaning means carried by the head (4) consist of defrosting means (36) of the lens. 3027007 WFR2144 14
    [0010]
    10. Cleaning device according to claim 9, characterized in that the defrosting means consist of a heating element disposed on the inner wall (16) of the head. 5
    [0011]
    11. Cleaning device according to one of claims 9 or 10, characterized in that said heating element consists of a ring disposed around the entire periphery of the inner wall (16). 10
    [0012]
    12. Cleaning device according to one of claims 9 to 11, characterized in that the heating element is bonded to the inner wall (16).
    [0013]
    13. Cleaning device according to one of claims 9 to 11, characterized in that the heating element is molded with the inner wall (16). 15
    [0014]
    14. Cleaning device according to one of claims 9 to 13, characterized in that the head comprises an orifice adapted to receive a control cable (38) of said defrosting means. 20
    [0015]
    15. Cleaning device according to one of claims 2 or 3, characterized in that the cleaning means carried by the head (4) consist of spray nozzles (32) and heating elements arranged distinctly on the annular wall internal (16) of the head. 25
    [0016]
    16. Cleaning device according to the preceding claim, characterized in that the spray nozzles (32) and the heating elements, welded or glued, are arranged alternately all around the inner annular wall (16) of the head (4). ). 3027007 WFR2144 15
    [0017]
    17. Motor vehicle comprising a cleaning device (1) of a camera (2) according to one of the preceding claims.
    [0018]
    18. Motor vehicle according to the preceding claim, characterized in that the camera (2) adapted to be cleaned by said cleaning device (1) is a rearview camera, disposed at the rear of the vehicle and oriented to take views a road scene extending to the rear of the vehicle.
    [0019]
    19. Motor vehicle according to one of claims 17 or 18, wherein the cleaning head (4) is made fixed relative to the structure of the motor vehicle, so as to be substantially flush with the outer body of the vehicle the camera (2) being movable between a passive position set back from the cleaning head and an active shooting position in which the lens (8) disposed at the end of the camera is also flush with compared to the outer bodywork.
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    同族专利:
    公开号 | 公开日
    RU2704076C2|2019-10-23|
    TR201815240T4|2018-11-21|
    CN105499183A|2016-04-20|
    JP6622547B2|2019-12-18|
    RU2015143154A3|2019-04-17|
    JP2016078841A|2016-05-16|
    ES2691988T3|2018-11-29|
    US9625714B2|2017-04-18|
    EP3006278A1|2016-04-13|
    US20160103316A1|2016-04-14|
    CN105499183B|2020-08-04|
    BR102015025849A2|2016-04-12|
    KR20160042783A|2016-04-20|
    FR3027007B1|2017-12-08|
    EP3006278B1|2018-08-01|
    RU2015143154A|2017-04-13|
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    法律状态:
    2015-11-02| PLFP| Fee payment|Year of fee payment: 2 |
    2016-04-15| PLSC| Publication of the preliminary search report|Effective date: 20160415 |
    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
    FR1459715A|FR3027007B1|2014-10-10|2014-10-10|DEVICE FOR CLEANING A DRIVING CAMERA FOR DRIVING A MOTOR VEHICLE|FR1459715A| FR3027007B1|2014-10-10|2014-10-10|DEVICE FOR CLEANING A DRIVING CAMERA FOR DRIVING A MOTOR VEHICLE|
    ES15186190.3T| ES2691988T3|2014-10-10|2015-09-22|Device for cleaning a camera for driving assistance of a motor vehicle|
    EP15186190.3A| EP3006278B1|2014-10-10|2015-09-22|Device for cleaning a driving assistance camera of a motor vehicle|
    TR2018/15240T| TR201815240T4|2014-10-10|2015-09-22|Cleaning device for a camera assisting the driving of a motor vehicle.|
    US14/877,148| US9625714B2|2014-10-10|2015-10-07|Device for cleaning a motor vehicle driving aid camera|
    KR1020150141298A| KR20160042783A|2014-10-10|2015-10-08|Device for cleaning a motor vehicle driving aid camera|
    RU2015143154A| RU2704076C2|2014-10-10|2015-10-09|Device for cleaning auxiliary car video camera|
    JP2015200810A| JP6622547B2|2014-10-10|2015-10-09|Cleaning device for car driving support camera|
    BR102015025849A| BR102015025849A2|2014-10-10|2015-10-09|device for cleaning an automotive vehicle steering aid camera|
    CN201510652150.5A| CN105499183B|2014-10-10|2015-10-10|Device for cleaning a motor vehicle driving assistance camera|
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