Vehicle optical detection system

Abstract

An optical detection system (100) for a vehicle (1) comprises at least one sensor (4) and a spraying device (5) for spraying a cleaning product onto the glazed surface (21) of this sensor. The sensor (4) is electrically connected to a power-supply and control network (11). According to the invention, the sensor (4) and the spraying device (5) are electrically connected to each other in the aim of controlling the spraying device (5).

Claims

1. An optical detection system for a vehicle comprising: at least one sensor; and a spraying device for spraying a cleaning product onto the glazed surface of the at least one sensor, the spraying device connected to a hydraulic distribution bus extending across the vehicle, the at least one sensor being electrically connected to a power-supply and a control network extending across the vehicle and transmitting control information for the spraying device, wherein the at least one sensor and the spraying device are electrically connected to each other in the aim of controlling the spraying device, and wherein the power-supply and control network and the hydraulic distribution bus are jointly and parallelly disposed in a single tube to form a single joint electrical and hydraulic bus for distributing spraying devices.

2. The optical detection system as claimed in claim 1, wherein the spraying device comprises an atomizer and an actuation device for actuating the atomizer.

3. The optical detection system as claimed in claim 2, wherein the actuation device and the sensor include electrical connection elements that cooperate to transmit at least one selected from a group consisting of a power supply and a control instruction from the power-supply and control network to the actuation device, by the sensor.

4. The optical detection system as claimed in claim 3, wherein the actuation device includes a control electronic module for ensuring control of same.

5. The optical detection system as claimed in claim 4, wherein the sensor comprises an electrical connection terminal and the actuation device comprises an electrical connection plug, the electrical connection plug of the actuation device being electrically connected to the power-supply and control network via the electrical connection terminal of the sensor.

6. The optical detection system as claimed in claim 4, wherein the electrical connection terminal of the sensor comprises two pins electrically connected to each other, a first pin being electrically connected to the power-supply and control network and the second pin being connected to the electrical connection plug of the actuation device, by a control and power-supply connection cable.

7. The optical detection system as claimed in claim 4, wherein the sensor includes a control electronic module configured to control the operation of the actuation device.

8. The optical detection system as claimed in claim 7, wherein the sensor comprises a first electrical connection terminal and a second electrical connection terminal separate from each other, and the actuation device comprises an electrical connection plug, the first electrical connection terminal of the sensor being connected to the power-supply and control network and the second electrical connection terminal of the sensor being connected to the electrical connection plug of the actuation device.

9. The optical detection system as claimed in claim 8, wherein only a single electrical connection terminal includes a pin dedicated to the transmission of data, this pin being connected to the control electronic module of the sensor and to the power-supply and control network.

10. The optical detection system as claimed in claim 9, wherein each electrical connection terminal includes two pins dedicated to supplying power, with one pin dedicated to a positive power supply terminal and one pin dedicated to earth, the two pins being electrically connected two by two, the two pins of the first electrical connection terminal being electrically connected to the power-supply and control network and the two pins of the second electrical connection being electrically connected to second and third pins of the electrical connection plug of the actuation device by means of a power supply connection cable.

11. The optical detection system as claimed in claim 1, wherein a casing accommodates the sensor and the spraying device.

12. The optical detection system as claimed in claim 1, further comprising: a plurality of sensors and associated devices for spraying a cleaning product, the plurality of sensors being electrically connected to a databus, forming the power-supply and control network, independently of each other.

13. The optical detection system as claimed in claim 1, wherein the single electrical and hydraulic distribution bus comprises a tube comprising, a central channel and a peripheral channel.

14. The optical detection system as claimed in claim 13, wherein the central channel is for circulating the cleaning product, and wherein strands for the power-supply and control circuits are disposed peripherally to the central channel, within the tube.

15. The optical detection system as claimed in claim 13, wherein the central channel is for strands for the power-supply and the control network, and wherein the cleaning product circulates peripherally to the central channel.

16. The optical detection system as claimed in claim 15, wherein the strands for the power supply and the control network are configured as resistance wires for heating the cleaning product.

Description

(1) Other characteristics, details and advantages of the invention will emerge more clearly on reading the description given below as an indication, in relation to the drawings, in which:

(2) FIG. 1 illustrates a schematic view of a motor vehicle equipped with an optical detection system according to the invention comprising a power-supply and control network and a hydraulic distribution bus coupled to each other and passing through the vehicle so as respectively to distribute power and control instructions, and a cleaning product, to spraying devices of the optical detection system assembled on the same vehicle,

(3) FIG. 2 illustrates a schematic view of a structural wall of the vehicle accommodating an hydraulic and electrical connector configured to connect two portions of the power-supply and control network and two portions of the hydraulic distribution bus, such as shown on FIG. 1,

(4) FIG. 3 illustrates a schematic view of a first embodiment of the invention in which an optical detection system is connected, on one hand, hydraulically to the hydraulic distribution bus and, on the other, electrically to a power-supply and control network, the optical detection system including a control electronic module fitted on the sensor and a control electronic module fitted on the spraying device,

(5) FIG. 4 illustrates a schematic view of a second embodiment of the invention in which an optical detection system is connected, on one hand, hydraulically to the hydraulic distribution bus and, on the other hand, electrically to a power-supply and control network, the optical detection system including a single control electronic module fitted on the sensor,

(6) and FIG. 5 illustrates a schematic view of two optical detection systems successively connected on one hand to a hydraulic distribution bus and on the other to a power-supply and control network in two zones separate from each other, the optical detection systems here conforming to that of the first embodiment illustrated on FIG. 3.

(7) FIG. 1 shows a motor vehicle 1 equipped with an optical detection system 100 according to the invention, which allows at least one glazed surface 21 of the vehicle 1 to be cleaned. Such a glazed surface can be for example an optical surface 21 of an optical sensor 4 equipping the vehicle 1.

(8) The optical detection system 100 thus comprises an optical sensor 4 and a spraying device 5 for spraying a cleaning product disposed in the vehicle 1 so as to be associated with cleaning a glazed surface 21 of this sensor 4, and it further includes a power-supply and control network 11 able to allow the supply of current and the transmission of control instruction to the optical detection system and more particularly to the device for spraying cleaning product. In the illustrated example, the vehicle is equipped with a plurality of spraying devices arranged in such a way as to be specifically dedicated to cleaning a single glazed surface, but it will be understood that several spraying devices could be dedicated to cleaning the same glazed surface, without departing from the context of the invention, and that the vehicle could be equipped with a single sensor and an associated spraying device, being understood that these variants would remain within the framework of the invention as long as the sensor or sensors are connected to a power-supply and control network 11 and as long as a sensor is connected to an associated cleaning device so as to transmit data aiming to control the operation of the spraying device.

(9) More particularly, according to the invention, each of the spraying devices 5 is electrically connected to the power-supply and control network 11 by means of the sensor 4.

(10) FIG. 5 illustrates an optical detection system 100, in which two assemblies, formed respectively by a sensor and a spraying device arranged in a casing 12 as will be described below, are connected to the same power-supply and control network 11 and to a common hydraulic distribution bus 3 independently of each other and in separate and successive zones 90, 92 (visible on FIG. 3) of the hydraulic distribution bus. In this non-limitative embodiment, it will be understood that a single power-supply and control network ensures the supply of power and control of all of the sensors and spraying devices of the detection system 100 arranged on this vehicle 1.

(11) The optical detection system 100 further comprises a pump 60 and a tank for storing cleaning product. The pump 60 is configured to retrieve the cleaning product in the storage tank and to supply the main hydraulic pipe continuously with cleaning product. More particularly, an outlet 61 of the pump 60 is connected to a first end 30 of the hydraulic distribution bus 3. The result is that the hydraulic distribution bus 3 extends along the vehicle from this first end 30 to a second end 31. In the illustrated example, the second end 31 of the hydraulic distribution bus 3, opposite the first end 30, is closed such that the hydraulic distribution bus 3 forms an open hydraulic circuit. Of course, the hydraulic distribution bus could be configured so as to form a closed hydraulic circuit and the second end 31 of the hydraulic distribution bus could in this context be connected to the storage tank.

(12) According to the invention, the power-supply and control network 11 is disposed in the vehicle to distribute current and control instructions to each assembly formed by a sensor and a spraying device, and for reasons of simplifying assembly and reducing costs, the power-supply and control network 11 advantageously runs along the hydraulic distribution bus 3, as is particularly visible on FIG. 2.

(13) The hydraulic distribution bus 3 and the power-supply and control network 11 here respectively have a first portion 32 arranged in the front part of the vehicle, and a second portion 33 arranged in the passenger compartment, each portion winding in the corresponding part of the vehicle so as to distribute all of the spraying devices present in this part of the vehicle. It is understood that hydraulic continuity is achieved here between these two portions 32, 33 since a single pump is provided on the hydraulic distribution bus.

(14) FIG. 2 shows a means of ensuring continuity between these portions 32, 33 when the bus and network 3, 11 have cause to pass through one or more walls 80 of the vehicle 1, this advantageously to optimize the routing of the bus and network in the vehicle 1 and thus to reduce the length required to implement same. In this case, the portions 32, 33 are connected to each other in pairs via a hydraulic and electrical connector 19. More particularly, a first portion 32 and a second portion 33 of the bus and network 3, 11 each support at their opposite end a hydraulic and electrical port for connecting them to the connector 19. It can be envisaged that two spraying devices 5 are connected to the same portion 32, 33 of the hydraulic distribution buses 3 and of the power-supply and control network 11 where each has a portion 32, 33 different from same.

(15) The power-supply and control network 11 and the hydraulic distribution bus 3 can be configured to form a single electrical and hydraulic bus 17 for distributing the spraying devices 5, with the power-supply and control network, which can be arranged in particular in a peripheral pipe of a central pipe accommodating the hydraulic distribution bus 3, the assembly being formed for example by an extruded pipe.

(16) With reference to FIGS. 3 to 5, a more detailed description will now be given of the sensors 4 and the spraying devices 5 of the optical detection system 100 and their cooperation with the power-supply and control network 11 common to at least two of these spraying devices, as they have been schematically shown on this FIG. 3. In what will follow, it is envisaged that the spraying devices all have the same shape so as to simplify the standardization of the optical detection system, but it is also obviously possible to adjust the shape and the size of the spraying device if necessary without departing from the context of the invention, as long as in accordance with what has been described previously, each spraying device is connected to the power-supply and control network by means of the sensor whose spraying device must clean the glazed surface.

(17) In the first embodiment illustrated on FIG. 3, the spraying device and the sensor of the same assembly each includes a control electronic module, among which it is possible to identify a first electronic module 120 arranged in the spraying device 5 and a second control electronic module 122 arranged in the sensor 4.

(18) More particularly, the second electronic module 122 is configured to control the operation of the sensor 4 and for example the triggering time and the duration of the detection, and to parameterize the exchange of data with a main electronic unit 200 on board the vehicle. And the first electronic module 120 is configured to control the operation of the spraying device 5 and for example the triggering time and the duration of spraying the cleaning product onto the associated glazed surface 21, and if need be, the specific zone of this glazed surface to clean.

(19) The spraying device 5 comprises an atomizer 8 and an actuation device 7. In what will follow, the actuation device will be represented by a solenoid valve 7, without for all that being limitative of the invention, any actuator allowing the implementation of the operation of the atomizer being able to be used equally. When the solenoid valve 7 is powered and actuated, that is to say when it has received a control instruction in this sense by means of the first electronic control unit 120, it authorizes the passage to the atomizer 8 of the cleaning product circulating in the hydraulic distribution bus 3. The cleaning product is then sprayed by the atomizer 8 onto a glazed surface 21 of the sensor 4 associated with the spraying device 5. The position of the atomizer 8 before spraying the cleaning product can be adjusted by means of movement instructions generated by the first control electronic module 120.

(20) The spraying device 5 comprises a hydraulic coupling component 9 for coupling the device to the hydraulic distribution bus 3. The hydraulic coupling component 9 has a shape susceptible on one hand of piercing the hydraulic distribution bus 3 and susceptible on the other of ensuring the passage of the cleaning product from this hydraulic distribution bus to the atomizer 8. To that effect, the coupling component can have the tubular and tapered shape of a syringe. When assembling the hydraulic coupling component 9 on the hydraulic distribution bus 3, a resin can be used to surround a contact zone between the hydraulic coupling component 9 and the hydraulic distribution bus 3, so as to ensure sealing of this contact zone.

(21) The spraying device 5 also comprises a mechanical holding component 10 allowing fastening to the hydraulic distribution bus 3. In the illustrated example, the mechanical holding component 10 takes the shape of a clamp at least partially surrounding the main hydraulic pipe contributing to form the hydraulic distribution bus 3. It is possible for example to envisage a holding component with elastic deformation, defining in its original position a neck of substantially smaller dimensions than that of the pipe defining the distribution bus, the operator then having to force the coupling component to be deformed so as to be able to grip the hydraulic distribution bus, and the spring-back of the coupling component ensuring holding in position on the bus.

(22) According to the invention, and whatever the way the spraying devices are hydraulically coupled, on a hydraulic distribution bus, common or not, and as visible for the assembly formed of a sensor and a spraying device shown as an example on FIG. 3 according to a first embodiment, or on FIG. 4 according to a second embodiment, each spraying device 5 is connected to the power-supply and control network 11 by means of the associated sensor 4, and on the same power supply and control network, independently of the electrical connection of the nearby spraying device. The assemblies formed by a spraying device and a sensor are electrically connected in connection zones separate from each other and spaced along the power-supply and control network.

(23) The power-supply and control network 11 is electrically connected to a main electronic unit 200 on board the vehicle and configured in particular to define control information and instructions and to encode them for transmission to the spraying devices targeted by these instructions. Any type of communication network can be implemented here, and for example a network operating with a communication protocol of the broadband over powerline (BPL) type, or with a communication protocol of the LIN or CAN type.

(24) The assembly formed by the spraying device 5 and the associated sensor 4 can be accommodated in a casing 12, as schematically illustrated on FIGS. 3 to 5. It should be noted that the hydraulic coupling or mechanical holding components can be supported by the casing in place of the solenoid valve as can have been described previously.

(25) The sensor 4 can be a video camera or a laser scanner required to allow a drive and/or maneuver aid device of the vehicle 1 to operate. When a spraying device 5 is associated with such an optical sensor 4, same can communicate with the main electronic unit 200 equipping this vehicle 1, via an electrical connection cable not illustrated here, separate from the power-supply and control network 11. As an example, when the optical sensor 4 is a camera, this electrical connection cable allows a video signal to be transmitted to the main electronic unit 200.

(26) As stated previously, the spraying device is electrically connected to the power-supply and control network by means of the associated sensor. More particularly, FIG. 3 illustrates the implementation of such a specific connection according to a first embodiment.

(27) In this first embodiment, the sensor 4 comprises an electrical connection terminal 40 and the solenoid valve 7 comprises an electrical connection plug 70, the electrical connection plug 70 of the solenoid valve 7 being electrically connected to the power-supply and control network via the electrical connection terminal 40 of the sensor 4.

(28) The electrical connection terminal 40 of the sensor 4 comprises two pins 401, 402 electrically connected to each other, with a first pin 401 which is electrically connected to the power-supply and control network 11 and the second pin 402 which is connected to the electrical connection plug 70 of the actuation device 7, by means of a control and power-supply connection cable 403.

(29) As has been stated, the solenoid valve 7 includes a control electronic module which is specific to it and which is configured to control it.

(30) It will then be understood that the electrical connection terminal 40 of the sensor 4 is used, on one hand to exchange data between the sensor 4 and the main electronic unit 200 via the power-supply and control network 11 and, on the other, to route this network 11 to the solenoid valve 7 of the spraying device 5, by means of the connection cable which is configured to pass both the power supply and the data and commands in accordance with the power-supply and control network 11.

(31) The respective control electronic modules of the sensor and of the solenoid valve 7 are programmed to analyze continuously the data transmitted by the power-supply and control network 11. When one of the control electronic modules identifies an instruction emitted by the main electronic unit 200, transmitted via the power-supply and control network 11 and which is dedicated to it, for example a control instruction for opening the solenoid valve 7, it actuates the sensor or the solenoid valve associated with it.

(32) The second embodiment illustrated on FIG. 4 differs from that which precedes in that the assembly formed by a sensor 4 and a spraying device 5 only includes one control electronic module, and more particularly in that only the sensor includes a control electronic module 122.

(33) As previously, the electronic module 122 arranged in the sensor is configured to control the operation of this sensor 4 and for example the triggering time and the duration of detection, and to parameterize the exchange of data with a main electronic unit 200 on board the vehicle, and it is parameterized here in a complementary way so as to determine operating conditions of the spraying device according to control instructions coming from the power-supply and control network: as an example, the electronic module fitted on the sensor 4 is configured to determine when to authorize or cut off the electrical power supply of the spraying device so as to control the triggering time and the duration of spraying the cleaning product onto the associated glazed surface 21.

(34) In this case, the sensor 4 comprises a first electrical connection terminal 43 and a second electrical connection terminal 44 separate from each other, whereas in accordance with what precedes, the actuation device 7 comprises an electrical connection plug 70.

(35) The first electrical connection terminal of the sensor is connected to the power-supply and control network 11 and the second electrical connection terminal of the sensor is connected to the electrical connection plug of the actuation device.

(36) In this second embodiment, only the first electrical connection terminal 43 includes a pin 404 dedicated to the transmission of data. This pin 404 of the first electrical connection terminal 43 is electrically connected on one hand to the power-supply and control network 11 and on the other to the control electronic module 122.

(37) In parallel, each electrical connection terminal 43, 44 includes two pins dedicated to supplying power, among which one pin dedicated to a positive power supply terminal and one pin dedicated to earth, these terminals being electrically connected two by two, that is to say the pins dedicated to the positive power supply together and the pins dedicated to earth together. The two pins of the first electrical connection terminal 43 are intended to be electrically connected to the power-supply and control network 11 and the two pins of the second electrical connection terminal 44 are intended to be electrically connected to second and third pins of the electrical connection plug 70 of the actuation device 7, by means of a power supply connection cable 405, only the electrical power supply circulating between the sensor and the spraying device in this second embodiment.

(38) FIG. 5 shows two spraying devices including these hydraulic coupling components and these mechanical holding components cooperating with the hydraulic distribution bus 3 at two separate coupling zones 90, 92, and the figure simultaneously illustrates the electrical connection of these two spraying devices, by means of the associated sensor, to the power-supply and control network 11, configured here as a network powered from the main electronic unit 200.

(39) It is understood that this disposition of the spraying devices successively arranged along a hydraulic distribution bus and along a power-supply and control network contributes, as a complement to the specific arrangement according to the invention according to which each spraying device is electrically connected to the bus or power-supply and control network by means of an associated sensor, which must in turn be connected to this bus or power-supply and control network, makes it possible significantly to reduce the quantity of electrical cables to be provided in order to equip the vehicle with a detection device having several sensors arranged all round the vehicle.

(40) It will have been understood on reading what precedes that the optical detection system according to the invention is advantageous in that it includes an electrical network configured to connect at minimum cost the different elements making up this optical detection system, and in particular a sensor and its associated cleaning device. This cleaning device is advantageously electrically connected to the sensor which acts as an intermediary between this cleaning device and the power-supply and control network. In all application cases, the optical detection system according to the invention makes it possible to reduce the length of the electrical connection cables as a result of the closeness of the sensor and the associated spraying device, and in certain cases, this system can make it possible to centralize the control electronics on the sensor, only one electrical power supply then being sent or not to the spraying device according to the instruction controlling the spraying device that is captured by the control electronics of the optical sensor.

(41) Of course, the characteristics, the embodiment variants of the invention can be associated with each other, according to diverse combinations, insofar as they are not incompatible or exclusive with respect to each other. It is possible in particular to imagine variants of the invention comprising only one choice of characteristics subsequently described in a manner isolated from the other described characteristics, if this choice of characteristics is sufficient to confer a technical advantage or to differentiate the invention with respect to the prior art.