Automobile automatic wiper redundancy control system and method

Abstract

The application provides a kind of automobile automatic wiper redundancy control method and system, under normal circumstances, vehicle body controller receives the gear signal of rain wiper control gear in central control large screen and combination switch to realize the control of different gear of rain wiper;When central control large screen is abnormal, vehicle body controller sets rain wiper control gear to automatic gear, vehicle body controller receives the rain signal sent by light rain sensor to realize rain wiper automatic control, when central control large screen and light rain sensor are all abnormal, vehicle body controller converts the point of combination switch and switches signal into gear switching signal, and uses rain wiper switch signal as rain wiper gear signal, until vehicle body controller and central control large screen and light rain sensor communication is normal, the point of combination switch and switches signal switches back to execute original point of wiper function, effectively solve when central control large screen or light rain sensor is damaged, vehicle body controller judges and loses normal communication, to ensure that rain wiper can continue to maintain normal function.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of automatic wiper control method of vehicle, and relates to an automatic wiper redundancy control system and method of vehicle. BACKGROUND

[0002] With the continuous development of economy and technology, people have a more intelligent life experience, and the design concept of vehicle intelligence and simplicity is continuously developed. The wiper is an essential electrical device of the vehicle. The vehicle driver selects different adjustment gears of the wiper to make the wiper perform corresponding water wiping operation, so as to help the vehicle driver obtain a better observation field of view when driving in the rain, thereby effectively ensuring the driving safety.

[0003] The application of automatic wiper of vehicle and the virtualization of operation switch are more and more common, which brings convenience to users, but also brings certain unreliability. The automatic wiper system mainly relies on the sensor to detect rainfall. If in some extreme weather conditions, such as blizzard or hail, the sensor may not accurately detect the rainfall condition, resulting in unreliable system. Some automatic wiper systems may not react quickly after detecting rainfall, resulting in temporary blurred vision or starting after the driver intervenes. In some cases, the driver may need to manually intervene the automatic wiper system, especially when the rainfall intensity changes quickly or there is a lot of water splashing on the road, the automatic wiper may not be able to adapt, which is easy to damage the central large screen or light rain sensor, resulting in abnormality of the wiper control system of the vehicle, and the wiper cannot continue to maintain normal function, causing the safety problem of the vehicle owner. SUMMARY

[0004] In view of the problems in the prior art, the application provides an automatic wiper redundancy control system and method of vehicle, which solves the problem that when the central large screen or light rain sensor is damaged, the body controller judges that it loses normal communication, and ensures that the wiper can continue to maintain normal function.

[0005] The application is realized by the following technical scheme:

[0006] An automatic wiper redundancy control method of vehicle, comprising,

[0007] Under normal circumstances, the body controller receives the wiper control gear in the central large screen and the gear signal of the combination switch to realize different gear control of the wiper.

[0008] When the body controller detects that the central large screen is abnormal, the body controller defaults the wiper control gear to automatic gear. In the case that the wiper switch cannot be operated, the body controller can realize automatic control of the wiper according to the rain signal sent by the light rain sensor, so as to ensure the normal work of the wiper system.

[0009] When the body controller detects that the central large screen and the light rain sensor are both abnormal, the body controller converts the point wiping signal of the combination switch into a gear switching signal, and uses the wiper switch signal as the wiper gear signal until the body controller communicates normally with the central large screen and the light rain sensor, and the point wiping signal of the combination switch switches back to perform the original point wiping function.

[0010] Preferably, under normal circumstances, when the central large screen is set to automatic gear, the body controller can realize automatic wiper control according to the rain signal sent by the light rain sensor through the LIN bus.

[0011] Preferably, under normal circumstances, the body controller executes the wiper wiping action only once for each operation of the point wiping signal of the combination switch.

[0012] Preferably, when the body controller detects that the central large screen and the light rain sensor are both abnormal, the specific process of using the wiper switch signal as the wiper gear signal is as follows:

[0013] The body controller controls the wiper motor to perform the first operation, and the wiper starts to perform the low-speed function. On this basis, the body controller controls the wiper motor to perform the second operation, and the wiper performs the high-speed function. The body controller controls the wiper motor to perform the third operation, and the wiper performs the closing function. This cycle is repeated until the body controller communicates normally with the central large screen and the light rain sensor, and the point wiping signal of the combination switch switches back to perform the original point wiping function.

[0014] An automobile automatic wiper redundancy control system, comprising,

[0015] A body controller, a central large screen, a combination switch, a light rain sensor, and a wiper motor.

[0016] The central large screen, the combination switch, and the light rain sensor are connected with the input end of the body controller; the wiper motor is connected with the output end of the body controller; and the central large screen is provided with a wiper control gear.

[0017] Preferably, the body controller is connected with the central large screen through the CAN bus.

[0018] Preferably, the central large screen is connected with the combination switch through the hard wire.

[0019] Preferably, the body controller receives the rain signal sent by the light rain sensor through the LIN bus.

[0020] Preferably, the wiper control gear includes a wiper OFF gear, a wiper low-speed gear, a wiper high-speed gear, and a wiper automatic gear.

[0021] Preferably, the combination switch includes a wiper point wiping gear.

[0022] Compared with the prior art, the present application has the following beneficial technical effects:

[0023] The present application provides an automobile automatic wiper redundancy control method for ensuring the normal operation of the wiper in the event of abnormality of some modules of the vehicle in the current application of automatic wiper technology for driving safety. Under normal circumstances, the body controller receives the wiper control gear position and the gear position signal of the combination switch in the central control large screen to realize different gear control of the wiper. When the body controller detects abnormality of the central control large screen, the body controller defaults the wiper control gear position to the automatic gear. In the case that the wiper switch cannot be operated, the body controller can realize automatic control of the wiper according to the rain signal sent by the light rain sensor, thereby ensuring the normal operation of the wiper system. When the body controller detects abnormality of both the central control large screen and the light rain sensor, the body controller converts the point wiping signal of the combination switch into a gear switching signal and uses the wiper switch signal as the wiper gear signal. After the body controller communicates normally with the central control large screen and the light rain sensor, the point wiping signal of the combination switch switches back to execute the original point wiping function. This effectively solves the problem that when the central control large screen or the light rain sensor is damaged, the body controller loses normal communication with them, and ensures that the wiper can continue to maintain normal function. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 Flow chart of the automobile automatic wiper redundancy control system. DETAILED DESCRIPTION

[0025] The present application will be further described in detail below with reference to specific examples, which are an explanation of the present application rather than a limitation.

[0026] In order for those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor should fall within the scope of protection of the present application.

[0027] The automobile automatic wiper redundancy control system comprises a body controller, a central control large screen, a combination switch, a light rain sensor and a wiper motor. The rotating shaft of the wiper motor is connected with the wiper to control the switch of the wiper.

[0028] The central control large screen, the combination switch and the light rain sensor are connected with the input end of the vehicle body controller; the wiper motor is connected with the output end of the vehicle body controller; the wiper control gear is arranged in the central control large screen. The light rain sensor can automatically detect the intensity of rain and automatically adjust the speed of the wiper according to the need. On the vehicle with the light rain sensor, the combination switch can also have a switching button between the manual and automatic modes.

[0029] The vehicle body controller is connected with the central control large screen through the CAN bus. The central control large screen is connected with the combination switch through the hard wire. The vehicle body controller receives the rain signal sent by the light rain sensor through the LIN bus. The LIN bus is a low-cost serial communication network defined for the distributed electronic system of the automobile, which is a supplement to other automobile multi-networks such as the controller area network (CAN), and is suitable for applications that do not have high requirements on the bandwidth, performance or fault tolerance function of the network. The LIN bus is based on the SCI (UART) data format and adopts the mode of single master controller / multiple slave devices, which is a special case of UART.

[0030] The wiper control gear includes a wiper OFF gear, a wiper low-speed gear, a wiper high-speed gear and a wiper automatic gear.

[0031] The combination switch includes a wiper point wiping gear. Under normal circumstances, the vehicle body controller only performs a wiper wiping action once for each operation of the wiper point wiping gear. The combination switch of the wiper is a switch used to control the wiper and washer system of the vehicle. It is usually installed on the steering wheel or instrument panel of the vehicle, which facilitates the driver to quickly adjust and control the functions of the wiper and water sprayer during driving.

[0032] II. Control method explanation:

[0033] 1. Normal wiper control method:

[0034] The vehicle body controller in the system receives the wiper OFF gear, low-speed gear, high-speed gear and automatic gear in the central control large screen and the point wiping gear signal of the combination switch through the hard wire to realize different gear control of the wiper. When the automatic gear is set in the large screen, the vehicle body controller can realize automatic control of the wiper according to the rain signal sent by the light rain sensor through the LIN bus.

[0035] 2. When the central control large screen in the wiper control system appears abnormal:

[0036] When the body controller detects that the central large screen is abnormal, the body controller will set the wiper control gear to automatic gear by default, so that in the case that the wiper switch cannot be operated, the body controller can realize automatic control of the wiper according to the rain signal sent by the light rain sensor, so as to ensure the normal work of the wiper system.

[0037] 3. When both the central large screen and the light rain sensor in the wiper control system are abnormal:

[0038] When the body controller detects that both the central large screen and the light rain sensor are abnormal, the body controller will automatically start another set of wiper control strategy, that is, at this time the point wiper signal of the combination switch will be converted into a gear switching signal. Under normal circumstances, the point wiper signal of the combination switch is operated once, and the body controller only executes the wiper wiping action once. When the above abnormal situation occurs, the wiper switch signal will be used as the wiper gear signal. When the wiper switch is operated for the first time, the wiper starts to execute the low-speed function. On this basis, operating the wiper switch again will execute the high-speed function of the wiper, and operating the wiper switch again will execute the closing function. This cycle is repeated until the BCM communicates normally with the central large screen and the light rain sensor, and the point wiper switch of the combination switch executes the original point wiper function.

[0039] 4. When the above two situations return to normal:

[0040] The body controller enters the normal working mode, the central large screen wiper gear signal is set to automatic gear by default, the wiper executes the automatic gear mode, and the wiper gear before the fault is not memorized.

[0041] In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device comprising a series of steps or units does not have to be limited to those steps or units clearly listed, but can include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0042] It should be noted that when a component is referred to as "fixed to" another component, it can be directly on the other component or there can be a middle component. When a component is referred to as "connected to" another component, it can be directly connected to the other component or there can be a middle component. When a component is referred to as "disposed on" another component, it can be directly disposed on the other component or there can be a middle component.

[0043] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items.

[0044] The above descriptions are only the preferred embodiments of the present application, not intended to limit the present application in any manner; any person skilled in the art can easily implement the present application according to the drawings and the above descriptions; however, any equivalent changes, modifications and evolutions made by those skilled in the art within the scope of the technical solutions of the present application, using the above disclosed technical contents, are equivalent embodiments of the present application; meanwhile, any equivalent changes, modifications and evolutions made according to the essential technology of the above embodiments are still within the protection scope of the technical solutions of the present application.

Claims

1. A method for redundant control of an automotive automatic wiper, characterized in that, The application relates to a wiper control system of a vehicle. Under normal circumstances, a body controller receives a wiper control gear position signal in a central control large screen and a gear position signal of a combination switch to realize different gear position control of the wiper; When the body controller detects that the central control large screen is abnormal, the body controller sets the wiper control gear position as an automatic gear, and in the case that the wiper switch cannot be operated, the body controller can realize automatic control of the wiper according to a rain signal sent by a light rain sensor, so that the wiper system can work normally; When the body controller detects that the central control large screen and the light rain sensor are both abnormal, the body controller converts a point wiping signal of the combination switch into a gear switching signal, and uses the wiper switch signal as a wiper gear position signal until the body controller communicates normally with the central control large screen and the light rain sensor, and the point wiping signal of the combination switch executes the original point wiping function.

2. The method of claim 1, wherein, Under the normal circumstances, when the central control large screen is set as the automatic gear, the body controller realizes automatic control of the wiper according to a rain signal sent by the light rain sensor through a LIN bus.

3. The method of claim 1, wherein, Under the normal circumstances, the body controller executes the wiper wiping action only once for each operation of the point wiping signal of the combination switch.

4. The method of claim 1, wherein, When the body controller detects that the central control large screen and the light rain sensor are both abnormal, the specific process of using the wiper switch signal as the wiper gear position signal is as follows: The body controller controls the wiper motor to execute the first operation, the wiper starts to execute the low-speed function, on the basis of which the wiper motor is controlled to execute the second operation, the wiper executes the high-speed function, the wiper motor is controlled to execute the third operation, the wiper executes the closing function, and the cycle is repeated until the body controller communicates normally with the central control large screen and the light rain sensor, and the point wiping signal of the combination switch executes the original point wiping function.

5. An automotive automatic wiper redundancy control system based on the automotive automatic wiper redundancy control method according to any one of claims 1 to 4, characterized in that, The application relates to a wiper control system of a vehicle. The body controller, the central control large screen, the combination switch, the light rain sensor and the wiper motor; The central control large screen, the combination switch and the light rain sensor are connected with the input end of the body controller; the wiper motor is connected with the output end of the body controller; and the central control large screen is provided with a wiper control gear position.

6. The automotive automatic wiper redundancy control system of claim 5, wherein, The body controller is connected with the central control large screen through a CAN bus.

7. The automotive automatic wiper redundancy control system of claim 5, wherein, The central control large screen is connected with the combination switch through a hard wire.

8. The automotive automatic wiper redundancy control system of claim 5, wherein, The body controller receives the rain signal sent by the light rain sensor through a LIN bus.

9. The automotive automatic wiper redundancy control system of claim 5, wherein, The wiper control gear position comprises a wiper OFF gear, a wiper low-speed gear, a wiper high-speed gear and a wiper automatic gear.

10. The automotive automatic wiper redundancy control system of claim 5, wherein, The combination switch comprises a wiper point wiping gear.

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