Optical surface cleaning system

Abstract

System for cleaning an optical surface The invention relates to a system (1) for cleaning an optical surface (3) of an optical sensor, in particular of a vehicle, comprising: at least two wiper blades (10) configured to clean at least one wiping zone (9) of a glazed surface (4), in particular of a windshield of a vehicle, each wiper blade (10) comprising at least one nozzle (11) configured to spray a cleaning fluid, in particular at one of its ends; anda control module configured to control the wiper blades (10) so that, when the wiper blades (10) are located opposite the optical surface (3) of the optical sensor, which optical surface (3) is arranged outside the scanning zone of the glass surface, the nozzles (11) of the wiper blades (10) project their cleaning fluids according to jets having different main projection axes (D1, D2). Figure for the abstract: Figure 3

Description

Title of the invention: System for cleaning an optical surface

[0001] The present invention relates to a system for cleaning an optical surface of an optical device, which optical device is assembled with a vehicle window, in particular a windshield.

[0002] The vehicle can be land, sea or air.

[0003] In certain vehicles, a sensor is provided, such as a camera, for example of the infrared type, which is located outside the sweeping plane of the wiper blade(s), for example behind the windshield, or mounted on the windshield or close to the windshield. In this case, it is recommended to have specific washing systems for the optical surface of the sensor, for example the sensor window or a protective window for the sensor, in particular to remove pollution (mud, insect(s), salt, etc.) or to remove drops, in particular when it rains.

[0004] The invention aims in particular to improve the cleaning of such optical surfaces.

[0005] The invention thus relates to a system for cleaning an optical surface of an optical sensor, in particular of a vehicle, comprising: - at least two wiper blades configured to clean at least one sweeping zone of a glass surface, in particular a windshield of a vehicle, each wiper blade comprising at least one nozzle configured to spray a cleaning fluid, in particular at one of its ends; and - a control module configured to control the wiper blades so that, when the wiper blades are located opposite the optical surface of the optical sensor, which optical surface is arranged outside the sweeping zone of the glass surface, the nozzles of the wiper blades spray their cleaning fluids according to jets having different main projection axes (D1, D2).

[0006] It is understood that the optical surface may be located on the windshield, or outside the windshield. For example, the optical surface is located near the windshield. For example, the optical surface is located near a side edge of the windshield. For example, the optical surface is located near an upper edge of the windshield, in other words, the edge of the windshield opposite the edge of the windshield near which a wiping system is mounted.

[0007] Thanks to these arrangements, the cleaning of the optical surface can thus be carried out by jets having different main projection axes, making it possible to obtain effective cleaning of the optical surface. The fact that the optical surface receives the cleaning fluid in two different orientations makes it possible, for example, to better spread the cleaning fluid on the optical surface and thus more effectively remove pollution (mud, insect(s), plant residue, salt, etc.) from the optical surface.

[0008] According to one aspect of the invention, one of the wiper blades is configured to be placed on the vehicle on the driver's side while the other of the wiper blades is configured to be placed on the passenger's side.

[0009] The two wiper blades are configured to wipe the same glass surface. The wiping zone within the meaning of the invention corresponds to the juxtaposition of the individual wiping zones of each of the blades.

[0010] According to one aspect of the invention, the control module is configured to trigger the projection of the cleaning fluid by the respective nozzles of the wiper blades in a staggered manner, in particular following a cleaning sequence which first comprises the projection of the cleaning fluid from one of the wiper blades and then the projection of the cleaning fluid from the other of the wiper blades.

[0011] Cleaning the optical surface can thus be carried out in two stages, making it possible to obtain effective cleaning of the optical surface.

[0012] In other words, in this exemplary embodiment of the invention, the two cleaning fluids coming from the wiper blades are not sprayed simultaneously but one after the other.

[0013] For example, the first fluid projected may be a washing fluid and the second fluid projected after the first cleaning fluid has been projected is air.

[0014] The invention thus makes it possible, for example, to clean the optical surface with a washing liquid then a jet of air (second cleaning fluid).

[0015] According to one aspect of the invention, the cleaning fluids may be the same from one brush to another, for example both being a washing liquid or both being air.

[0016] Thus, the invention makes it possible to effectively clean the optical surface by projecting this cleaning fluid along the two different main projection axes.

[0017] Alternatively, the cleaning fluids are different from one wiper blade to another. For example, one of the cleaning fluids on one of the wipers may be a washing liquid and the cleaning fluid on the other wiper blade may be air, especially air in the form of a jet.

[0018] According to one aspect of the invention, at least one of the wiper blades comprises at least two nozzles configured to spray the same cleaning fluid, or to spray two different cleaning fluids respectively.

[0019] In the case of two different cleaning fluids, on the same wiper blade, one of the nozzles is, for example, configured to spray a washing liquid and the other of the nozzles is configured to spray air to expel the washing liquid previously deposited by the other nozzle on the optical surface.

[0020] By combining with the other of the brushes, it is for example possible to project a washing liquid along two different main projection axes using the two brushes, and the air nozzle on one of the brushes makes it possible to expel the washing liquid previously deposited on the optical surface by the two brushes.

[0021] Thus, different combinations are possible, taking into account that one of the brushes may comprise one or at least two nozzles (for the same cleaning fluid or different cleaning fluids) and the other of the brushes may also comprise one or at least two nozzles (for the same cleaning fluid or different cleaning fluids).

[0022] According to one aspect of the invention, the control module is configured to control the projection of cleaning fluid sequentially by the wiper blades.

[0023] Alternatively, the control module is configured to control the projection of cleaning fluid simultaneously by the wiper blades.

[0024] According to one aspect of the invention, the control module is configured to control a projection of cleaning fluid during an upward movement of the wiper blade and / or in a downward movement of the wiper blade.

[0025] For example, the control module is configured to control a projection of cleaning fluid on the driver's side during an upward movement of the wiper blade and / or in a downward movement of the wiper blade.

[0026] The projection of cleaning fluid can be triggered only during an upward movement of the wiper blade or during a downward movement of the wiper blade, or during both the upward movement and the downward movement.

[0027] According to one aspect of the invention, the control module is configured to control, for one of the wipers, a projection of cleaning fluid during an upward movement of the wiper blade, and, for the other of the wipers, a projection of cleaning fluid during a downward movement of the wiper blade.

[0028] Thus, for example, between the projection of a washing liquid by one of the brushes and the projection of air which will expel this washing liquid by the other of the brushes, a time elapses which allows the washing liquid to act on the optical surface.

[0029] According to one aspect of the invention, the control module is configured to implement a cleaning sequence using the two cleaning fluids of the two brushes, taking into account at least one of the following parameters: - the number of wiping cycles which can be 1, 2 or more; - the speed of the vehicle; - the outside temperature of the vehicle; - the viscosity of the cleaning fluid; - the rotation speed of the motor or motors which operate the wiper blade(s); - the activation pressure of the forced movement device.

[0030] For example, the nature of the cleaning fluid (washing liquid or air for example) and / or its dosage can be adjusted according to at least one of the above parameters. It is thus possible, for example, to spray more washing liquid when the vehicle is traveling faster.

[0031] Furthermore, the duration of projection of the washing fluid onto the optical surface can be adjusted according to at least one of the above parameters.

[0032] According to one aspect of the invention, the nozzle of at least one of the wipers is configured to deflect and accelerate air encountered by the moving wiper blade.

[0033] This air flow comes in particular from the headwind when the vehicle is moving.

[0034] In this case, the projection of the cleaning fluid (for example air) is done passively.

[0035] In the case where an air jet is obtained by a passive nozzle, that is to say with an aerodynamic shape to generate accelerated air, this air jet occurs continuously during the oscillating movement of the associated wiper blade. In this case, when the wiper blade passes opposite the optical surface, the air jet reaches the optical surface along the main projection axis associated with this wiper blade. There is no need, in this case, to speak of an angular window for the air jet because this air jet can be present throughout the oscillating movement of the blade.

[0036] Alternatively, the cleaning system comprises a device for forcibly moving the cleaning fluid of at least one of the wiper blades. This forced movement device is, for example, a compressor, in particular an electric compressor. The forced movement device may also be a pump.

[0037] According to one aspect of the invention, the main projection axes (D1, D2) are intersecting.

[0038] According to one aspect of the invention, the main projection axes (D1, D2) are parallel and in opposite directions.

[0039] According to one aspect of the invention, the main projection axes form an angle of at least 5° or 10° between them. It is taken as a reference that, if the two axes are coincident and in the same direction, the angle between the two axes is chosen to be equal to zero, and if the two axes are coincident and in opposite directions, the angle between the two axes is chosen to be equal to 180°.

[0040] According to one aspect of the invention, the main projection axes form a substantially right angle (90°) between them.

[0041] According to one aspect of the invention, the main projection axes form an angle between them of between 0 and 90°.

[0042] According to one aspect of the invention, the main projection axes form an angle between them of between 90° and 180°.

[0043] According to one aspect of the invention, for one of the wiper blades, the main projection axis corresponds to a longitudinal direction of the wiper blade when this wiper blade is facing the optical surface.

[0044] In other words, the jet of cleaning fluid coming from the wiper blade is substantially in the longitudinal extension of the wiper blade.

[0045] According to another exemplary embodiment of the invention, the main projection axis (imposed for example by the orientation of the nozzle) is chosen so that the main projection axis makes an angle with the longitudinal direction of the wiper blade.

[0046] According to one aspect of the invention, the control module is configured to control a projection of cleaning fluid in an angular window during the movement of the brush.

[0047] In other words, the cleaning fluid is not sprayed continuously during the oscillating movement of the wiper blade. The cleaning fluid is sprayed only in the angular window during the movement of the blade.

[0048] For example, the cleaning fluid is projected in an angular window of less than 2 or 3 or 5 or 10 degrees.

[0049] This avoids wasting cleaning fluid that would otherwise be sprayed onto areas that do not need to be cleaned.

[0050] In an exemplary embodiment of the invention, the control module is configured to immobilize the wiper blade during a projection of cleaning fluid.

[0051] This makes it possible to place the wiper blade opposite the optical surface to be cleaned, in an immobilized manner, and to project the cleaning fluid effectively.

[0052] The immobilization may correspond to a duration of 1, 2 or 3 seconds, in particular less than 5 or 10 seconds.

[0053] In an exemplary implementation of the invention, the control module is configured to project the cleaning fluid (for example a washing liquid) from one of the wiper blades by immobilizing this wiper blade while for the other wiper blade (for example configured to project a jet of air) the projection is done while the associated wiper blade is in motion.

[0054] According to one aspect of the invention, the cleaning fluid projection nozzle is produced on an end piece (also called an “endclip” in English) arranged at one of the ends of the wiper blade.

[0055] Alternatively, the nozzle for spraying the cleaning fluid may be made on a mount of the wiper blade, and not on the end piece.

[0056] The cleaning liquid may be a mixture of alcohol and water.

[0057] The cleaning fluid may be chosen to allow defrosting of the optical surface.

[0058] According to one aspect of the invention, the optical surface of the optical sensor is located on the glass surface, outside the scanning zone.

[0059] Alternatively, the optical surface of the optical sensor is outside the glass surface, being for example on a housing placed on the roof of the vehicle. Alternatively, the optical surface of the optical sensor may be on a pillar running along one side of the windshield.

[0060] According to one aspect of the invention, the optical sensor is a camera, in particular an infrared camera, arranged to detect the presence of water drops on the window, so as to trigger the operation of the wiper blade in the event of detection of water drops.

[0061] For example, the optical sensor is a LidaR sensor.

[0062] According to one aspect of the invention, the optical surface of the sensor is flush with the glass surface or protrudes from the glass surface or is recessed from the glass surface.

[0063] According to one aspect of the invention, the cleaning system comprises cleaning fluid reservoirs fluidically connected to the nozzles of the wiper blades.

[0064] The wiper blades may be of a parallel configuration or an opposing configuration.

[0065] In the parallel configuration, the brushes are set in motion so that the brushes oscillate in the same direction.

[0066] In the opposing configuration, the brushes are set in motion so that the brushes oscillate in opposite directions.

[0067] The invention also relates to a method for cleaning an optical surface of an optical sensor, in particular of a vehicle, comprising the following steps: - provide at least two wiper blades configured to clean at least one wiping area of a glass surface, in particular a windshield of a vehicle, each wiper blade comprising at least one nozzle configured to spray a cleaning fluid, in particular at one of its ends; - controlling the wiper blades so that, when the wiper blades are opposite the optical surface of the optical sensor, which optical surface is arranged outside the scanning zone of the glass surface, the nozzles of the wiper blades project their cleaning fluids according to jets having different main projection axes (D1, D2).

[0068] Other characteristics and advantages of the invention will appear more clearly on reading the following description, given as illustrative and non-limiting examples, and the appended drawings among which:

[0069] - [Fig.l] illustrates, schematically and partially, a cleaning system according to an example of implementation of the invention;

[0070] - [Fig.2] illustrates, schematically and partially, one of the wiper blades of the cleaning system of [Fig.l];

[0071] - [Fig.3] illustrates, schematically and partially, an operating step in cleaning the system of [Fig.l];

[0072] - [Fig.4] illustrates, schematically and partially, another step of cleaning operation of the system of [Fig.l];

[0073] - [Fig.5] illustrates, schematically and partially, a cleaning system according to another example of implementation of the invention;

[0074] - [Fig.6] illustrates, schematically and partially, an operating step in cleaning the system of [Fig.5];

[0075] - [Fig.7] illustrates, schematically and partially, another step of operation in cleaning of the system of [Fig.5].

[0076] [Fig.l] shows a cleaning system 1 for an optical surface 3 of an optical sensor 2, which optical sensor 2 is assembled with a vehicle windshield 4.

[0077] The optical device 2 is assembled with the windshield 4, being projecting from this windshield 4. Alternatively, the optical device 2 is assembled with the windshield 4, being flush with this windshield 4.

[0078] The optical surface 3 is the surface through which the waves penetrate into the optical device 2, which in the example described forms an infrared sensor. The optical sensor 2 is arranged to detect the presence of water drops or at least one pollution on the window, so as to trigger the operation of the wiper blade in the event of detection of water drops or at least one pollution.

[0079] The cleaning system 1 comprises two wiper blades 10 configured to each clean an individual sweeping zone 6 of the windshield 4, using an associated testing blade which is in contact with the windshield 4. The sweeping zone 9 within the meaning of the invention corresponds to the juxtaposition of these individual sweeping zones 6 of each of the blades 10.

[0080] As illustrated for example in [Fig.2], each wiper blade 10 comprises at least one nozzle 11 configured to spray a cleaning fluid, in particular at one of its ends 14.

[0081] The projection nozzle 11 is arranged at the longitudinal end 14 of the wiper, among its two opposite longitudinal ends, which passes closest to the optical surface 3 during scanning.

[0082] The cleaning fluid projection nozzle 11 is produced on an end piece 13 (also called an “endclip” in English) arranged at the end 14 of the wiper blade 10.

[0083] Alternatively, the nozzle for spraying the cleaning fluid 11 can be produced on a mount of the wiper blade, and not on the end piece.

[0084] The projection nozzle 11 comprises for example an outlet orifice, in the form of a convergent to accelerate the fluid.

[0085] The projection nozzle 11 is configured so as to direct the projected fluid outside the wiping zone 6.

[0086] In other words, the fluid which is projected by this projection nozzle 11 is not used for cleaning the wiping zone 9.

[0087] The nozzle 11 is connected to a pipe 16 for supplying fluid to the nozzle 11.

[0088] This pipe 16 connects a forced movement device 22, such as an electric compressor 22 or a pump 22 to the projection nozzle 11.

[0089] The wiper blade 10 is attached to a wiper arm 18, and the pipe 16 which connects the movement device for 22 to the projection nozzle 11, runs along the wiper arm 18 for a certain length.

[0090] The movement device for 22 is arranged to bring the cleaning fluid towards the projection nozzle 11.

[0091] The wiper arm 18 is mechanically connected to an electric motor 19 arranged to put it into wiping movement.

[0092] The electric motor 19 is coupled to an angular position sensor 20 arranged to determine the angle that the sweeper arm 18 makes relative to a reference position. The electric motor, in particular when the electric motor is an electronized motor, can also already integrate a position sensor and hold the information of the angular position directly.

[0093] In the example described, the cleaning system 1 further comprises a cleaning fluid reservoir 22.

[0094] One of the wiper blades 10 is configured to be placed on the vehicle on the driver's side while the other of the wiper blades 10 is configured to be placed on the passenger's side.

[0095] In the example of [Fig.l], the wiper blades 10 operate in an opposing configuration, namely the blades 10 are set in wiping motion so that the blades 10 oscillate in opposite directions of rotation.

[0096] The cleaning system 1 comprises a control module 100 (for example of the electronic type) configured to control the wiper blades 10 so that, when the wiper blades 10 are located opposite the optical surface 3 of the optical sensor 2, which optical surface 3 is arranged outside the scanning zone 9, the nozzles 11 of the wiper blades 10 project their cleaning fluids according to jets symbolized by the arrows J1 and J2, having different main projection axes DI and D2, as can be seen in figures 3 and 4.

[0097] The control module 100 is configured to trigger the projection of the cleaning fluid by the respective nozzles 11 of the wiper blades 10 in a staggered manner, in particular following a cleaning sequence which first comprises the projection of the cleaning fluid from one of the wiper blades and then the projection of the cleaning fluid from the other of the wiper blades.

[0098] In other words, the two cleaning fluids coming from the wiper blades 10 are not sprayed simultaneously but one after the other.

[0099] The angular position sensor 20 or the electric motor 19 is connected to the control module 100 to know the angular position of the brushes, and to trigger the projection of cleaning fluid when the angular position corresponds to the angular position of each brush 10 which comes opposite the surface 3 to be cleaned.

[0100] In the example of Figures 3 and 4, the first projected fluid J1 (along the main projection direction DI in [Fig.3]) can be a washing liquid and the second projected fluid J2 (along the main projection direction D2 in [Fig.4]) after the first cleaning fluid has been projected, is air.

[0101] The invention thus makes it possible, for example, to clean the optical surface with a washing liquid then a jet of air (second cleaning fluid J2), which makes it possible to clean the optical surface with the washing liquid then to dry this optical surface with the jet of air.

[0102] In the sequence illustrated in Figures 3 and 4 (with opposing wipers 10), the driver's side wiper is used for cleaning before the passenger's side wiper. Other sequences are of course possible.

[0103] Cleaning can thus be carried out in two stages, making it possible to obtain effective cleaning of the optical surface 3.

[0104] In the example described, the cleaning fluids are different from one wiper blade to another. One of the cleaning fluids on one of the wipers may be a washing liquid and the cleaning fluid on the other wiper blade may be air, in particular air in the form of a jet.

[0105] The cleaning liquid may be a mixture of alcohol and water.

[0106] The cleaning fluid may be chosen to allow defrosting of the optical surface.

[0107] In a variant of the invention, the cleaning fluids are the same from one broom to another.

[0108] In the example described, the control module 100 is configured to control a projection of cleaning fluid during an upward movement of the wiper blades 10.

[0109] Of course, it would be possible to control a projection of cleaning fluid during a downward movement of the wiper blades 10, or both (namely during both the upward movement and the downward movement).

[0110] For example, the control module 100 is configured to control, for one of the wipers, a projection of cleaning fluid during an upward movement of the wiper blade, and, for the other of the wipers, a projection of cleaning fluid during a downward movement of the wiper blade.

[0111] The control module 100 is configured to implement a cleaning sequence using the two cleaning fluids of the two brushes 10, taking into account at least one of the following parameters: - the number of wiping cycles which can be 1, 2 or more; - the speed of the vehicle; - the outside temperature of the vehicle; - the viscosity of the cleaning fluid; - the rotation speed of the motor or motors which drive(s) the wiper blades; - the activation pressure of the forced movement device.

[0112] For example, the nature of the cleaning fluid (washing liquid or air for example) and / or its dosage can be adjusted according to at least one of the above parameters. It is thus possible, for example, to spray more washing liquid when the vehicle is traveling faster.

[0113] Furthermore, the duration of projection of the washing fluid onto the optical surface can be adjusted according to at least one of the above parameters.

[0114] The main projection axes DI and D2 are intersecting, and make an angle ANG of at least 5° or 10° between them. It is taken as a reference that, if the two axes DI and D2 are merged and in the same direction, the angle ANG between the two axes is chosen equal to zero, and if the two axes are merged and in opposite directions, the angle between the two axes is chosen equal to 180°.

[0115] For example, the main projection axes DI and D2 form a substantially right angle (90°) between them, or an angle ANG between 0 and 90°.

[0116] For the wiper blades 10, the main projection axis D1, D2 coincides with a longitudinal direction XI, X2 of the corresponding wiper blade 10 when this wiper blade is opposite the optical surface 3.

[0117] In other words, the jet of cleaning fluid coming from the wiper blade 10 is substantially in the longitudinal extension XI, X2 of the wiper blade.

[0118] The control module 100 is configured to control a projection of cleaning fluid in an angular window during the movement of the brush.

[0119] In other words, the cleaning fluid is not continuously sprayed during the oscillating movement of the wiper blade. The cleaning fluid is sprayed only in the angular window during the movement of the blade.

[0120] For example, the cleaning fluid is projected in an angular window of less than 2 or 3 or 5 or 10 degrees.

[0121] This avoids wasting cleaning fluid that would otherwise be sprayed onto areas that do not need to be cleaned.

[0122] If desired, the control module 100 is configured to immobilize the wiper blade 10 during a projection of cleaning fluid.

[0123] This makes it possible to place the wiper blade 10 opposite the optical surface 3 to be cleaned, in an immobilized manner, and to project the cleaning fluid effectively.

[0124] The immobilization may correspond to a duration of 1, 2 or 3 seconds, in particular less than 5 or 10 seconds.

[0125] In a variant of the invention illustrated in Figures 5 to 7, the wiper blades 10 are in a parallel configuration, namely the blades are set in motion so that the blades oscillate in the same direction of rotation.

[0126] In this parallel mode, the main projection axis D2 of the wiper blade 10 on the passenger side is chosen so that the main projection axis D2 makes an angle ANG2 (between 45° and 90°) with the longitudinal direction X2 of the wiper blade 10, as can be seen in [Fig.7].

[0127] The other brush 10 on the driver's side projects the fluid in the longitudinal axis of the brush as in the previous example.

[0128] In a variant of the invention, instead of a protective orifice, the nozzle of at least one of the wipers 10 is configured to deflect and accelerate air encountered by the moving wiper blade.

[0129] This air flow comes in particular from the headwind when the vehicle is moving.

[0130] In this case, the projection of the cleaning fluid (for example air) is done passively.

[0131] In the case where an air jet is obtained by a passive nozzle, that is to say with an aerodynamic shape to generate accelerated air, this air jet occurs permanently during the oscillating movement of the associated wiper blade. In this case, when the wiper blade passes opposite the optical surface, the air jet reaches the optical surface along the main projection axis associated with this wiper blade. There is no need, in this case, to speak of an angular window for the air jet because this air jet can be present during the entire oscillating movement of the blade. Of course, the invention is not limited to the embodiment(s) described above. for illustrative and non-limiting purposes, within the scope of the claims. The characteristics described relating to a method are also applicable to the system / devices described and vice versa.

Claims

Claims

1. Cleaning system (1) of an optical surface (3) of an optical sensor (2), in particular of a vehicle, comprising: - at least two wiper blades (10) configured to clean at least one wiping zone (9) of a glazed surface (4), in particular of a windshield of a vehicle, each wiper blade (10) comprising at least one nozzle (11) configured to spray a cleaning fluid, in particular at one of its ends; and - a control module (100) configured to control the wiper blades (10) so that, when the wiper blades (10) are located opposite the optical surface (3) of the optical sensor, which optical surface (3) is arranged outside the scanning zone of the glass surface, the nozzles (11) of the wiper blades (10) project their cleaning fluids according to jets having different main projection axes (D1, D2).

2. Cleaning system (1) according to the preceding claim, wherein the control module (100) is configured to trigger the projection of the cleaning fluid by the respective nozzles (11) of the wiper blades (10) in a staggered manner, in particular following a cleaning sequence which first comprises the projection of the cleaning fluid from one of the wiper blades and then the projection of the cleaning fluid from the other of the wiper blades.

3. Cleaning system (1) according to one of the preceding claims, wherein the cleaning fluids are the same from one brush (10) to another, for example both being a washing liquid or both being air.

4. Cleaning system (1) according to one of claims 1 and 2, wherein the cleaning fluids are different from one wiper blade (10) to another, for example one of the cleaning fluids on one of the wipers being a washing liquid and the cleaning fluid on the other wiper blade (10) being air, in particular air in the form of a jet.

5. Cleaning system (1) according to one of the preceding claims, wherein the control module (100) is configured to control a projection of cleaning fluid during an upward movement of the wiper blade and / or in a downward movement descending of the wiper blade (10), in particular the projection of cleaning fluid being able to be triggered only during an upward movement of the wiper blade or during a downward movement of the wiper blade, or both during the upward movement and the downward movement.

6. Cleaning system (1) according to one of the preceding claims, in which the cleaning system comprises a device for forced movement of the cleaning fluid of at least one of the wiper blades (10), this forced movement device being for example a compressor (22) or a pump.

7. Cleaning system (1) according to one of the preceding claims, in which the main projection axes (D1, D2) are intersecting, or the main projection axes (D1, D2) are parallel and in opposite directions.

8. Cleaning system (1) according to one of the preceding claims, wherein the control module (100) is configured to immobilize the wiper blade during a projection of cleaning fluid.

9. Cleaning system (1) according to one of the preceding claims, wherein the control module (100) is configured to move the wiper blades (10) in a parallel configuration or an opposing configuration.

10. A method for cleaning an optical surface (3) of an optical sensor, in particular of a vehicle, comprising the following steps: - providing at least two wiper blades (10) configured to clean at least one scanning zone of a glass surface, in particular of a windshield of a vehicle, each wiper blade (10) comprising at least one nozzle (11) configured to spray a cleaning fluid, in particular at one of its ends; - controlling the wiper blades (10) so that, when the wiper blades (10) are located opposite the optical surface (3) of the optical sensor, which optical surface (3) is arranged outside the scanning zone of the glass surface, the nozzles of the wiper blades (10) spray their cleaning fluids in jets presenting different principal projection axes (Dl, D2).

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