A control method and control system for repairing wiper motor reset errors

Abstract

The present invention relates to the technical field of vehicle wiper control, and more specifically to a control method and control system for repairing wiper motor reset errors. The present invention primarily utilizes domain controller logic control to filter the response time when a reset signal is first detected, thereby preventing the wiper from resetting due to noise, thereby improving the accuracy of the domain controller's reset signal acquisition. Furthermore, upon the next automatic wiper switch signal being issued, logic processing can be performed to avoid wiper failure due to a reset signal error caused by a previous noise signal. This allows for timely repair of wiper motor reset errors, effectively ensuring the normal operation of the vehicle's wipers.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicle wiper control, and in particular to a control method and a control system for repairing wiper motor reset errors. Background Art

[0002] At present, the existing automobile wiper control technology generally receives the wiper switch information and ignition switch information sent by the driver through the CAN bus. The domain controller controls the connection and disconnection of the wiper high-speed or low-speed coil through the wiper drive control unit to realize the high-speed or low-speed operation and stop of the wiper; the wiper reset status information acquisition unit obtains and provides the wiper reset information to the domain controller; the domain controller implements logical control of the wiper according to the control method.

[0003] However, due to the hysteresis interval in the reset state, when the wiper motor is in the hysteresis range between the reset and non-reset intervals, reset noise is easily generated, resulting in errors in the reset signal collection of the domain controller, and the wiper rushes out of the reset interval, causing the wiper to not return to its position. Summary of the Invention

[0004] The technical problem to be solved by the present invention is: in view of the shortcomings of the existing technology, a control method and control system for repairing wiper motor reset errors are provided, which can improve the accuracy of domain controller reset signal acquisition, and can promptly repair wiper motor reset errors, effectively ensuring the normal operation of vehicle wipers.

[0005] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0006] A control method for repairing wiper motor reset errors, which monitors the vehicle's wiper position, wiper switch signal, and wiper reset signal in real time and executes corresponding control strategies to drive the wipers to work normally;

[0007] The control strategy includes:

[0008] A. When the wiper manual start command has been triggered, the wiper position is within the reset range, and the wiper reset signal is detected for the first time, the wiper reset signal is filtered for a time period of t1, and the filtered wiper reset signal is sent to the vehicle domain controller, where t2 < t1 < t3, where t2 is the time the wiper motor is within the hysteresis range, and t3 is the time required for the wiper reset;

[0009] B. When the wiper is in the automatic on / off state and the wiper position has exceeded the reset range, the wiper drive unit outputs a wiper forced action signal for time t4, where t4>t3. When it is detected that the wiper position has returned to the reset range, the wiper forced action signal returns to 0, and the wiper drive unit receives the control signal of the vehicle domain controller normally.

[0010] Furthermore, the control method specifically includes the following steps:

[0011] S1, detecting the vehicle ignition switch information to determine whether the vehicle has been ignited, if so, proceeding to step S2, if not, not starting the control method;

[0012] S2, real-time monitoring of the wiper switch signal and wiper reset signal. If the wiper manual on command is triggered, execute step S3; if the wiper automatic on command is triggered, execute step S5;

[0013] S3, determining whether the wiper reset signal is detected for the first time, if so, executing step S4, if not, executing step S5;

[0014] S4, filtering the current wiper reset signal for a time period of t1, then sending the filtered wiper reset signal to the vehicle domain controller, and executing step S7;

[0015] S5, determining whether the current wiper position is within the reset range, if so, directly sending a wiper reset signal to the vehicle domain controller and executing step S7, if not, executing step S6;

[0016] S6, outputting a wiper forced action signal for time t4 via the wiper drive unit, and re-execute step S5;

[0017] S7, the vehicle domain controller controls the wiper drive unit to output a corresponding wiper action signal.

[0018] Furthermore, the wiper switch signal is sent from the vehicle's wiper control lever to the vehicle domain controller via the CAN bus. The wiper switch signal specifically includes: a manual wiper switch signal and an automatic wiper switch signal.

[0019] Furthermore, the current wiper position is obtained by the vehicle domain controller receiving an encoder signal installed on the wiper motor and performing position calculation.

[0020] Furthermore, the wiper motor is provided with a first relay and a second relay, and the first relay and the second relay are both electrically connected to the wiper drive unit;

[0021] The first relay is used to control the wiper motor to be connected to the vehicle power supply according to the wiper forward rotation action signal, so as to drive the wiper motor to rotate forward;

[0022] The second relay is used to control the wiper motor to be connected to the vehicle power supply according to the wiper reverse rotation action signal, so as to drive the wiper motor to reverse.

[0023] Furthermore, the wiper reset signal is acquired by a wiper reset information acquisition unit installed in the vehicle, and the wiper reset signal is filtered by a wiper reset signal filtering unit installed in the vehicle. Both the wiper reset information acquisition unit and the wiper reset signal filtering unit are electrically connected to the vehicle domain controller.

[0024] Furthermore, the wiper forced action signal is specifically implemented by hard-wiring the wiper drive unit and the wiper motor.

[0025] Based on the same inventive concept, the present invention also provides a vehicle wiper control system for implementing the above-mentioned control method, which mainly includes:

[0026] The wiper control lever is used to output the corresponding wiper switch signal according to the driver's operation;

[0027] The wiper reset information acquisition unit is used to obtain the wiper reset signal;

[0028] Wiper motor encoder, used to obtain wiper position information;

[0029] A vehicle domain controller, configured to receive the wiper switch signal, wiper reset signal, and wiper position information, and execute the control method described above;

[0030] The wiper drive unit is used to receive control instructions from the vehicle domain controller and output corresponding wiper action signals to the wiper motor.

[0031] Compared with the prior art, the present invention has the following main advantages:

[0032] 1. The present invention provides a control method for repairing wiper motor reset errors. The method can filter the response time when the reset signal is first detected to prevent the wiper from resetting due to noise. In addition, the method can perform logical processing when the next automatic wiper switch signal is sent to avoid the wiper from not operating due to the reset signal error caused by the previous noise signal.

[0033] 2. The control system provided by the present invention fully utilizes the control functions of the vehicle domain controller and the wiper drive. Through the cooperation of the two, it can accurately and conveniently monitor the wiper position information, wiper switch signal and wiper reset signal in real time;

[0034] 3. The control method provided by the present invention can promptly repair the reset error of the wiper motor, effectively ensure the normal operation of the vehicle wiper, and improve the vehicle driving experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 Flowchart of a control method for repairing a wiper motor reset error according to an embodiment of the present invention;

[0036] Figure 2 This is a schematic diagram of the vehicle wiper control system in an embodiment of the present invention. Specific embodiments

[0037] In order to make the objectives, technical solutions and advantages of the present invention more clear and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0038] It should be noted that according to the needs of implementation, each step / component described in this application can be split into more steps / components, or two or more steps / components or partial operations of steps / components can be combined into new steps / components to achieve the objectives of the present invention.

[0039] Embodiment 1. A control method for repairing the reset error of the wiper motor provided in this embodiment. When the wiper motor is in the hysteresis range of the reset and non-reset intervals, clutter is likely to occur, resulting in incorrect acquisition of the reset signal by the domain controller and the wiper rushing out of the reset interval, causing the wiper not to return to the home position. The following control scheme is used for correction:

[0040] 1. When the wiper returns to the reset interval and the domain controller acquires the first reset signal:

[0041] The wiper switch signal has been detected. At this time, when the first reset signal is detected, the reset signal is filtered for t1 time. Since the hysteresis interval of the reset signal is within the t2 time period, t1 needs to be > t2. Since the hardware for acquiring the wiper motor reset is a return plate structure and the reset interval time is t3, the filtering time t1 needs to satisfy: t2 < t1 < t3, which can effectively filter the clutter signal and ensure that the domain controller acquires an effective reset signal, and the wiper responds normally to the switch signal.

[0042] 2. When the wiper receives an automatic switch command and becomes valid, and the previous reset signal error causes the current reset signal not to return to the home position:

[0043] The wiper automatic switch signal is valid. At this time, due to the previous reset signal error, the current reset signal does not return to the home position, and the wiper will not operate. In response to this situation, after receiving the automatic switch command, the hard-wired output signal of the wiper is forced to output for t4 time, t4 > t3, to ensure that the wiper enters the reset area. At this time, the forced reset signal is set to 0 and within the reset area, and the wiper performs a normal wiping operation.

[0044] Embodiment 2. A control method for repairing the reset error of the wiper motor provided in this embodiment, as Figure 1The specific steps are as follows:

[0045] S1, detecting the vehicle ignition switch information to determine whether the vehicle has been ignited, if so, proceeding to step S2, if not, not starting the control method;

[0046] S2, real-time monitoring of the wiper switch signal and wiper reset signal. If the wiper manual on command is triggered, execute step S3; if the wiper automatic on command is triggered, execute step S5;

[0047] S3, determining whether the wiper reset signal is detected for the first time, if so, executing step S4, if not, executing step S5;

[0048] S4, filtering the current wiper reset signal for a time period of t1, then sending the filtered wiper reset signal to the vehicle domain controller, and executing step S7;

[0049] S5, determining whether the current wiper position is within the reset range, if so, directly sending a wiper reset signal to the vehicle domain controller and executing step S7, if not, executing step S6;

[0050] S6, outputting a wiper forced action signal for time t4 via the wiper drive unit, and re-execute step S5;

[0051] S7, the vehicle domain controller controls the wiper drive unit to output a corresponding wiper action signal.

[0052] The wiper switch signal is sent from the vehicle's wiper control lever to the vehicle domain controller via the CAN bus. The wiper switch signal specifically includes a manual wiper switch signal and an automatic wiper switch signal.

[0053] Preferably, the current wiper position is obtained by the vehicle domain controller receiving an encoder signal installed on the wiper motor and performing position calculation.

[0054] Preferably, the wiper motor is provided with a first relay and a second relay, and the first relay and the second relay are both electrically connected to the wiper drive unit;

[0055] The first relay is used to control the wiper motor to be connected to the vehicle power supply according to the wiper forward rotation action signal, so as to drive the wiper motor to rotate forward;

[0056] The second relay is used to control the wiper motor to be connected to the vehicle power supply according to the wiper reverse rotation action signal, so as to drive the wiper motor to reverse.

[0057] Preferably, the wiper reset signal is acquired by a wiper reset information acquisition unit installed in the vehicle, and the wiper reset signal is filtered by a wiper reset signal filtering unit installed in the vehicle. Both the wiper reset information acquisition unit and the wiper reset signal filtering unit are electrically connected to the vehicle domain controller.

[0058] Preferably, the wiper forced action signal is implemented by hard-wiring the wiper drive unit and the wiper motor.

[0059] Example 3: Based on the same inventive concept, this embodiment also provides a vehicle wiper control system for implementing the above control method, such as Figure 2 As shown, it mainly includes:

[0060] The wiper control lever is used to output the corresponding wiper switch signal according to the driver's operation;

[0061] The wiper reset information acquisition unit is used to obtain the wiper reset signal;

[0062] Wiper motor encoder, used to obtain wiper position information;

[0063] A vehicle domain controller, configured to receive the wiper switch signal, wiper reset signal, and wiper position information, and execute the control method described above;

[0064] The wiper drive unit is used to receive control instructions from the vehicle domain controller and output corresponding wiper action signals to the wiper motor.

[0065] Embodiment 4: Based on the same inventive concept, this embodiment further provides a manual-automatic vehicle, which is equipped with the vehicle wiper control system as described above.

[0066] In summary:

[0067] The present invention mainly performs response time filtering processing through domain controller logic control when the reset signal is detected for the first time, so as to avoid the phenomenon that the wiper cannot be reset due to noise, thereby improving the accuracy of the domain controller reset signal acquisition; in addition, when the next automatic wiper switch signal is sent, logical processing can be performed to avoid the situation where the wiper does not operate due to the reset signal error caused by the previous noise signal, thereby being able to promptly repair the wiper motor reset error and effectively ensure the normal operation of the vehicle wiper.

[0068] It will be easily understood by those skilled in the art that the above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A control method for repairing wiper motor reset errors, characterized in that: The control process includes the following: Detecting the vehicle ignition switch information to determine whether the vehicle has been ignited, and if so, continuing to execute the subsequent control process; if not, not starting the control method; Monitor vehicle wiper position, wiper switch signal, and wiper reset signal in real time, and execute corresponding control strategies; When the manual wiper on command is triggered and the wiper position is within the reset range, it is determined whether the wiper reset signal is detected for the first time. If so, the current wiper reset signal is filtered for time t1, and then the filtered wiper reset signal is sent to the vehicle domain controller, where t2 < t1 < t3, where t2 is the time the wiper motor is in the hysteresis range and t3 is the time required for the wiper to reset. If not, or if the automatic wiper on / off command is triggered, the subsequent control process is continued. Determine whether the current wiper position is within the reset interval. If so, directly send a wiper reset signal to the vehicle domain controller, and control the wiper drive unit through the vehicle domain controller to output a corresponding wiper action signal; if not, output a wiper forced action signal of time t4 through the wiper drive unit, where t4>t3, and re-determine whether the current wiper position is within the reset interval. When it is detected that the wiper position returns to the reset interval, the wiper forced action signal returns to 0, and the wiper drive unit receives the control signal of the vehicle domain controller normally.

2. A control method for repairing wiper motor reset errors according to claim 1, characterized in that: The wiper switch signal is sent from the vehicle's wiper control lever to the vehicle domain controller via the CAN bus. The wiper switch signal specifically includes: a wiper manual switch signal and a wiper automatic switch signal.

3. The control method for repairing wiper motor reset error according to claim 1, characterized in that: The current wiper position is obtained by the vehicle domain controller receiving an encoder signal installed on the wiper motor and performing position calculation.

4. The control method for repairing wiper motor reset error according to claim 3, characterized in that: The wiper motor is provided with a first relay and a second relay, and the first relay and the second relay are both electrically connected to the wiper drive unit; The first relay is used to control the wiper motor to be connected to the vehicle power supply according to the wiper forward rotation action signal, so as to drive the wiper motor to rotate forward; The second relay is used to control the wiper motor to be connected to the vehicle power supply according to the wiper reversal action signal, so as to drive the wiper motor to reverse.

5. The control method for repairing wiper motor reset error according to claim 1, characterized in that: The wiper reset signal is acquired by a wiper reset information acquisition unit installed in the vehicle, and the wiper reset signal is filtered by a wiper reset signal filtering unit installed in the vehicle. Both the wiper reset information acquisition unit and the wiper reset signal filtering unit are electrically connected to the vehicle domain controller.

6. The control method for repairing wiper motor reset error according to claim 1, characterized in that: The wiper forced action signal is specifically implemented by hard-wiring the wiper drive unit and the wiper motor.

7. A vehicle wiper control system, used to implement the control method according to any one of claims 1 to 6, characterized in that: include: The wiper control lever is used to output the corresponding wiper switch signal according to the driver's operation; A wiper reset information acquisition unit, used to obtain a wiper reset signal; Wiper motor encoder, used to obtain wiper position information; a vehicle domain controller, configured to receive the wiper switch signal, the wiper reset signal, and the wiper position information, and execute the control method according to any one of claims 1 to 6; The wiper drive unit is used to receive control instructions from the vehicle domain controller and output corresponding wiper action signals to the wiper motor.

8. A non-transitory readable storage medium having a program stored thereon, characterized in that: When the program is executed by a vehicle wiper control system, the control method according to any one of claims 1 to 6 is implemented.

9. A manual-automatic vehicle, characterized in that: Including the vehicle wiper control system according to claim 7.

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