A wiper failure detection method, system, device and train

Abstract

The application discloses a wiper fault detection method, system and device and a train, relates to the wiper control field, and is used for detecting the fault reason of the wiper, a first current transformer is arranged between the output positive terminal of the motor control box and the input positive terminal of the motor, a second current transformer is arranged between the output negative terminal of the motor control box and the input negative terminal of the motor, and therefore, the fault reason of the wiper is determined according to the current value between the output positive terminal of the motor control box and the input positive terminal of the motor detected by the first current transformer and the current value between the output negative terminal of the motor control box and the input negative terminal of the motor detected by the second current transformer, so that the user can repair the reason causing the wiper fault, the normal work of the wiper is ensured, and the vehicle can be safely and normally operated.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of wiper control, in particular to a wiper fault detection method, system, device and train. BACKGROUND

[0002] The wiper is an important accessory installed on the train or car window, which can remove the rain, snow and dust on the window glass to avoid affecting the view. Therefore, it plays an important role in driving safety.

[0003] When the wiper is controlled, a wiper button is usually arranged between the power supply and the motor control box. When the user presses the wiper button, the motor control box is powered on, thereby controlling the motor to drive the transmission mechanism to operate, so that the transmission mechanism drives the up and down wiper arms of the wiper to move.

[0004] However, when the wiper does not move normally after the user presses the wiper button in the prior art, the cause of the wiper fault cannot be determined, so that the user cannot accurately repair the wiper, and the wiper cannot work normally, which greatly affects the safe operation of the train or vehicle. SUMMARY

[0005] The purpose of the present application is to provide a wiper fault detection method, system, device and train. The cause of the wiper fault is determined according to the current value between the output positive terminal of the motor control box and the input positive terminal of the motor detected by the first current transformer, and the current value between the output negative terminal of the motor control box and the input negative terminal of the motor detected by the second current transformer, so that the user can repair the wiper according to the cause of the wiper fault, ensure the normal work of the wiper, and make the vehicle run safely and normally.

[0006] To solve the above technical problems, the present application provides a wiper fault detection method. The input positive terminal of the motor control box is connected with the power supply through the wiper button, and the input negative terminal is connected with the negative line of the vehicle through the wiper button. The first end of the first current transformer is connected with the output positive terminal of the motor control box, and the second end is connected with the input positive terminal of the motor. The first end of the second current transformer is connected with the output negative terminal of the motor control box, and the second end is connected with the input negative terminal of the motor. The output terminal of the motor is connected with the transmission mechanism. The output terminal of the transmission mechanism is connected with the up and down wiper arms of the wiper.

[0007] The method comprises:

[0008] When the wiper button is pressed and the up and down wiper arms do not move normally, the current values detected by the first current transformer and the second current transformer are determined.

[0009] determining a failure cause of the wiper based on the current values detected by the first current transformer and the second current transformer.

[0010] Preferably, determining the failure cause of the wiper based on the current values detected by the first current transformer and the second current transformer comprises:

[0011] when the first current transformer detects that the current value of the positive output end of the motor control box is 0, determining that the motor control box is faulty;

[0012] when the first current transformer detects that the current value is not 0, but the second current transformer detects that the current value of the negative input end of the motor control box is 0, determining that the motor is faulty;

[0013] when the current value detected by the first current transformer and the current value detected by the second current transformer are both not 0, but are less than a preset current value, determining that the transmission mechanism is faulty.

[0014] Preferably, a first pressure sensitive resistor is arranged between the lower wiper arm of the wiper and the vehicle window, and a second pressure sensitive resistor is arranged between the upper wiper arm and the vehicle window; a first end of the first pressure sensitive resistor is connected with the power supply, a second end is connected with the second pressure sensitive resistor, and a second end of the second pressure sensitive resistor is connected with a third current transformer; a second end of the third current transformer is connected with the negative line of the vehicle.

[0015] The method further comprises:

[0016] determining whether the current value detected by the third current transformer is 0;

[0017] if yes, determining that the wiper is in a fracture failure;

[0018] Preferably, after determining whether the current value detected by the third current transformer is 0, the method further comprises:

[0019] if the current value detected by the third current transformer is not 0, determining whether the current value detected by the third current transformer is less than a preset value;

[0020] if less than the preset value, determining that the wiper is in a floating failure.

[0021] Preferably, after determining whether the current value detected by the third current transformer is 0, the method further comprises:

[0022] if determining that the wiper is in a fracture failure, prompting a user that the wiper is in a fracture failure;

[0023] if determining that the wiper is in a floating failure, prompting a user that the wiper is in a floating failure.

[0024] Preferably, when the wiper button is pressed and the up and down wiper arms of the wiper do not operate normally, the determination of the current values detected by the first current transformer and the second current transformer further comprises:

[0025] If it is determined that the motor control box is faulty, the user is prompted that the motor control box is faulty;

[0026] If it is determined that the motor is faulty, the user is prompted that the motor is faulty;

[0027] If it is determined that the transmission mechanism is faulty, the user is prompted that the transmission mechanism is faulty.

[0028] To solve the above technical problems, the present application provides a wiper fault detection system, the input positive terminal of the motor control box is connected with the power supply through the wiper button, and the input negative terminal is connected with the negative line of the vehicle through the wiper button; the first end of the first current transformer is connected with the output positive terminal of the motor control box, and the second end is connected with the input positive terminal of the motor; the first end of the second current transformer is connected with the output negative terminal of the motor control box, and the second end is connected with the input negative terminal of the motor; the output end of the motor is connected with the transmission mechanism; and the output end of the transmission mechanism is connected with the up and down wiper arms of the wiper.

[0029] The system comprises:

[0030] A first determination unit is configured to determine the current values detected by the first current transformer and the second current transformer when the wiper button is pressed and the up and down wiper arms of the wiper do not operate normally.

[0031] A second determination unit is configured to determine the fault cause of the wiper based on the current values detected by the first current transformer and the second current transformer.

[0032] To solve the above technical problems, the present application provides a wiper fault detection device, which comprises:

[0033] A memory is configured to store a computer program.

[0034] A processor is configured to execute the computer program to realize the steps of the wiper fault detection as described above.

[0035] Preferably, the device further comprises:

[0036] A first current transformer is arranged between the output positive terminal of the motor control box and the input positive terminal of the motor, and the output end of the first current transformer is connected with the processor, so as to collect the current values between the output positive terminal of the motor control box and the input positive terminal of the motor.

[0037] A second current transformer is arranged between the output negative end of the motor control box and the input negative end of the motor, and the output end is connected with the processor, for collecting the current value between the output negative end of the motor control box and the input negative end of the motor.

[0038] Preferably, the first pressure sensitive resistor, the second pressure sensitive resistor and the third current transformer are further included.

[0039] The first pressure sensitive resistor is arranged between the lower wiper arm of the wiper and the vehicle window, and the first end is connected with the power supply, and the second end is connected with the second pressure sensitive resistor.

[0040] The second pressure sensitive resistor is arranged between the upper wiper arm of the wiper and the vehicle window, and the second end is connected with the third current transformer.

[0041] The second end of the third current transformer is connected with the negative line of the vehicle, and the output end is connected with the processor, for detecting the current value of the circuit in which the first pressure sensitive resistor and the second pressure sensitive resistor are arranged.

[0042] To solve the above technical problems, the application provides a train comprising the wiper fault detection device.

[0043] The application provides a wiper fault detection method, system, device and train, and relates to the field of wiper control, which is used for detecting the fault cause of the wiper. BRIEF DESCRIPTION OF DRAWINGS

[0044] In order to more clearly illustrate the technical solutions in the embodiments of the application, the drawings needed in the prior art and the embodiments will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the application, and other drawings can be obtained by those skilled in the art without creative effort on the basis of these drawings.

[0045] Figure 1 A flowchart of the wiper fault detection method provided by the application is shown in the figure.

[0046] Figure 2A structure schematic diagram of a wiper fault detection system provided by the present application is provided.

[0047] Figure 3 A structure schematic diagram of a wiper fault detection device provided by the present application is provided.

[0048] Figure 4 A specific structure schematic diagram of a wiper fault detection device provided by the present application is provided.

[0049] Figure 5 A structure schematic diagram of a wiper provided by the present application is provided. DETAILED DESCRIPTION

[0050] The core of the present application is to provide a wiper fault detection method, system, device and train, according to the current value between the output positive terminal of the motor control box and the input positive terminal of the motor detected by the first current transformer and the current value between the output negative terminal of the motor control box and the input negative terminal of the motor detected by the second current transformer, the fault reason of the wiper is determined, so as to ensure that the user can repair the reason causing the wiper fault, ensure the normal work of the wiper, and make the vehicle run safely and normally.

[0051] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are 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 are within the protection scope of the present application.

[0052] Please refer to Figure 1 , Figure 1 A flowchart of a wiper fault detection method provided by the present application is provided, the input positive terminal of the motor control box 41 is connected with the power supply through the wiper button K, and the input negative terminal is connected with the negative line of the vehicle through the wiper button K; the first end of the first current transformer I1 is connected with the output positive terminal of the motor control box 41, and the second end is connected with the input positive terminal of the motor M; the first end of the second current transformer I2 is connected with the output negative terminal of the motor control box 41, and the second end is connected with the input negative terminal of the motor M; the output terminal of the motor M is connected with the transmission mechanism 42; the output terminal of the transmission mechanism 42 is connected with the up and down wiper arms of the wiper.

[0053] The method comprises:

[0054] S11: when the wiper button K is pressed and the up and down wiper arms of the wiper do not act normally, the current values detected by the first current transformer I1 and the second current transformer I2 are determined.

[0055] The applicant considers that when a user wants to start the wiper so that the wiper wipes the dirt on the window that blocks the view, if the wiper does not work normally according to the user's instruction, the prior art cannot accurately determine the cause of the wiper not working normally, so that the user cannot repair the wiper immediately, and even worse, the vehicle cannot drive safely.

[0056] In order to solve the above technical problems, the wiper button K is arranged between the motor control box 41 and the power supply in the application. When the user presses the wiper button K, the motor control box 41 is normally powered, so as to control the motor M to drive the transmission mechanism 42 to operate, so that the transmission mechanism 42 drives the up and down wiper arms of the wiper to operate normally. However, when any one of the motor control box 41, the motor M and the transmission mechanism 42 fails, the wiper cannot work normally.

[0057] Based on this, the first current transformer I1 is arranged between the output positive terminal of the motor control box 41 and the input positive terminal of the motor M, and the second current transformer I2 is arranged between the output negative terminal of the motor control box 41 and the input negative terminal of the motor M. The first current transformer I1 detects the current value between the output positive terminal of the motor control box 41 and the input positive terminal of the motor M, and the second current transformer I2 detects the current value between the output negative terminal of the motor control box 41 and the input negative terminal of the motor M.

[0058] S12: Determine the cause of the wiper failure based on the current values detected by the first current transformer I1 and the second current transformer I2.

[0059] The first current transformer I1 detects whether the motor control box 41 normally outputs current to the motor M, the second current transformer I2 detects whether the motor M normally operates to make the output negative terminal of the motor control box 41 and the input negative terminal of the motor M exist normal current flow, and whether the motor M is in no-load state, and determines the cause of the wiper not working normally as the motor control box 41 failure, the motor M failure or the transmission mechanism 42 failure according to the current values detected by the first current transformer I1 and the second current transformer I2, so as to ensure that the user can repair the cause of the wiper failure, ensure the normal work of the wiper, and ensure the normal driving of the vehicle.

[0060] When the fault cause of the wiper is determined based on the current values detected by the first current transformer I1 and the second current transformer I2, specifically, but not limited to, when the first current transformer I1 detects that the current value of the output positive terminal of the motor control box 41 is 0, it is determined that the motor control box 41 is faulty; when the first current transformer I1 detects that the current value is not 0, but the second current transformer I2 detects that the current value of the input negative terminal of the motor control box 41 is 0, it is determined that the motor M is faulty; when the current values detected by the first current transformer I1 and the second current transformer I2 are both not 0, but less than a preset current value, it is determined that the transmission mechanism 42 is faulty.

[0061] Specifically, when the first current transformer I1 detects that the current value of the output positive terminal of the motor control box 41 is 0, it can be determined that the motor control box 41 cannot normally output current to drive the motor M, thereby causing the wiper to malfunction. At this time, the user can directly repair the motor control box 41 to ensure that the motor control box 41 can normally drive the motor M. Preferably, after determining that the motor M control is faulty, the user can be directly prompted that the motor control box 41 is faulty, so that the user can repair the motor control box 41 in time.

[0062] When the first current transformer I1 detects that the current value of the output positive terminal of the motor control box 41 is not 0, but the second current transformer I2 detects that the current value of the output negative terminal of the motor control box 41 is not 0, it can be determined that the motor control box 41 can normally output current to drive the motor M, but the motor M is faulty and cannot drive the transmission mechanism 42, causing the wiper to malfunction. Preferably, after determining that the motor M is faulty, the user can be directly prompted that the motor M is faulty, so that the user can directly repair or replace the motor M to ensure that the motor M can normally drive the transmission mechanism 42 and ensure the normal operation of the wiper.

[0063] In addition, when the first current transformer I1 detects that the voltage of the output positive terminal of the motor control box 41 and the voltage of the output negative terminal of the motor M detected by the second current transformer I2 are both not 0, but less than a preset current value, it can be determined that the motor control box 41 can normally output, and the motor M can normally operate, but the motor M cannot drive the transmission mechanism 42, i.e. the transmission mechanism 42 is faulty and causes the motor M to be in an idle state. Preferably, after determining that the transmission mechanism 42 is faulty, the user can be directly prompted that the transmission mechanism 42 is faulty, so that the user can directly repair the transmission mechanism 42 to ensure that the transmission mechanism 42 can normally drive the wiper to work.

[0064] It should be noted that the wiper in the present application can be a wiper arranged on a high-speed rail vehicle window, and the present application is not limited in this regard. In the present application, the upper and lower wiper arms connected to the transmission mechanism 42 are the upper wiper arm and the lower wiper arm of the wiper.

[0065] In summary, the current value between the output positive terminal of the motor control box 41 and the input positive terminal of the motor M detected by the first current transformer I1 and the current value between the output negative terminal of the motor control box 41 and the input negative terminal of the motor M detected by the second current transformer I2 are used to determine the failure cause of the wiper, so that the user can repair the wiper according to the failure cause, ensure the normal operation of the wiper, and ensure the safe and normal operation of the vehicle.

[0066] Based on the above embodiment, the method further comprises:

[0067] As a preferred embodiment, the first pressure-sensitive resistor R1 is arranged between the lower wiper arm and the vehicle window, and the second pressure-sensitive resistor R2 is arranged between the upper wiper arm and the vehicle window; the first end of the first pressure-sensitive resistor R1 is connected with the power supply, the second end is connected with the second pressure-sensitive resistor R2, the second end of the second pressure-sensitive resistor R2 is connected with the third current transformer I3; the second end of the third current transformer I3 is connected with the negative line of the vehicle.

[0068] The method further comprises:

[0069] determining whether the current value detected by the third current transformer I3 is 0;

[0070] If yes, it is determined that the wiper is in a fracture failure.

[0071] In the embodiment, the applicant considers that not only the driving mechanism of the wiper, i.e., the motor control box 41, the motor M and the transmission mechanism 42, but also the wiper itself can cause the wiper to fail to work normally. For example, when the vehicle is a train, the wiper can be hit by a bird when the train is running at a high speed. With the high-frequency vibration of the train, the main component of the wiper that is hit can gradually loosen and break. However, when the wiper is not completely broken and the wiper is far away from the driver, the human eye cannot observe the fine cracks or local breakage of the wiper component in detail, and the wiper cannot be repaired in time, so the wiper cannot work normally.

[0072] In order to solve the above technical problems, the application sets a pressure sensitive resistor on the main component of the wiper, i.e. the upper wiper arm and the lower wiper arm of the wiper, specifically, sets a first pressure sensitive resistor R1 on the lower wiper arm and a second pressure sensitive resistor R2 on the lower wiper arm, the first pressure sensitive resistor R1, the second pressure sensitive resistor R2 and the third current transformer I3 are connected in series between the power supply and the negative line of the vehicle, forming a series circuit, by judging whether the current detected by the third current transformer I3 in the series circuit is 0, whether the series circuit is disconnected, i.e. whether the upper wiper arm or the lower wiper arm of the wiper is broken, if the series circuit is disconnected, it can be directly determined that the wiper is broken, at this time, the user can be prompted that the wiper is broken, so that the user can repair the wiper as soon as possible to ensure the normal work of the wiper and the normal running of the train.

[0073] In addition, when the train is running at high speed, the wiper of the windshield of the driver's cab at the rear end of the train will be disturbed by complex high-speed airflow and appear floating phenomenon, if the wiper cannot adhere to the glass surface, the wiper cannot clean the windshield, and the driver cannot confirm the safety of the train running, thereby threatening the safety of passengers.

[0074] In order to solve the above technical problems, as a preferred embodiment, after judging whether the current value detected by the third current transformer I3 is 0, it further includes:

[0075] If the current value detected by the third current transformer I3 is not 0, it is judged whether the current value detected by the third current transformer I3 is less than a preset value;

[0076] If it is less than the preset value, it is determined that the wiper is floating failure.

[0077] It can be seen that when the third current transformer I3 detects that the current value of the series circuit is not 0, i.e. the series circuit composed of the first pressure sensitive resistor R1, the second pressure sensitive resistor R2 and the third current transformer I3 is not disconnected, it can be determined that the wiper does not appear broken failure, at this time, it is further judged whether the current detected by the third current transformer I3 is less than a preset value, if the current value is not less than the preset value, it can be determined that the wiper normally adheres to the window and works normally; and if the current value is less than the preset value, it can be determined that the resistance of the first pressure sensitive resistor R1 and / or the second pressure sensitive resistor R2 increases due to the wiper not normally adhering to the window, the current in the series circuit decreases, it can be determined that the wiper is floating failure, at this time, the wiper cannot adhere to the window and cannot normally clean the window, and the driver cannot determine the running environment of the train, i.e. the normal running of the train cannot be ensured. Preferably, at this time, the user is prompted that the wiper is floating failure, so that the user can handle the wiper in time to ensure that the wiper adheres to the window and normally cleans the window.

[0078] Please refer to Figure 2 ,Figure 2 A structure diagram of a wiper fault detection system provided by the present application is shown in the figure. The input positive terminal of the motor control box 41 is connected to the power supply through the wiper button K, and the input negative terminal is connected to the negative line of the vehicle through the wiper button K. The first terminal of the first current transformer I1 is connected to the output positive terminal of the motor control box 41, and the second terminal is connected to the input positive terminal of the motor M. The first terminal of the second current transformer I2 is connected to the output negative terminal of the motor control box 41, and the second terminal is connected to the input negative terminal of the motor M. The output terminal of the motor M is connected to the transmission mechanism 42. The output terminal of the transmission mechanism 42 is connected to the upper and lower wiper arms of the wiper.

[0079] The system comprises:

[0080] The first determination unit 21 is configured to determine the current values detected by the first current transformer I1 and the second current transformer I2 when the wiper button K is pressed and the upper and lower wiper arms of the wiper do not operate normally.

[0081] The second determination unit 22 is configured to determine the fault cause of the wiper based on the current values detected by the first current transformer I1 and the second current transformer I2.

[0082] For the wiper fault detection system provided by the present application, please refer to the above method embodiment, which will not be described here.

[0083] Please refer to Figure 3 , Figure 3 A structure diagram of a wiper fault detection device provided by the present application is shown in the figure. The device comprises:

[0084] The memory 31 is configured to store a computer program.

[0085] The processor 32 is configured to execute the computer program to realize the steps of the wiper fault detection as described above.

[0086] For the wiper fault detection device provided by the present application, please refer to the above method embodiment, which will not be described here.

[0087] Please refer to Figure 4 , Figure 4 A specific structure diagram of a wiper fault detection device provided by the present application is shown in the figure.

[0088] As a preferred embodiment, it further comprises:

[0089] The first current transformer I1 is arranged between the output positive terminal of the motor control box 41 and the input positive terminal of the motor M, and the output terminal is connected to the processor 32, for collecting the current value between the output positive terminal of the motor control box 41 and the input positive terminal of the motor M.

[0090] A second current transformer I2 is arranged between the output negative terminal of the motor control box 41 and the input negative terminal of the motor M, and is connected with the processor 32, and is used to collect the current value between the output negative terminal of the motor control box 41 and the input negative terminal of the motor M.

[0091] In the embodiment, the first current transformer I1 is used to detect the current between the output positive terminal of the motor control box 41 and the input positive terminal of the motor M, and the second current transformer I2 is used to detect the current between the output negative terminal of the motor control box 41 and the input negative terminal of the motor M, so that the processor 32 can judge the cause of the wiper failure according to the current values detected by the first current transformer I1 and the second current transformer I2, so as to ensure the normal operation of the wiper.

[0092] As a preferred embodiment, the first pressure-sensitive resistor R1, the second pressure-sensitive resistor R2 and the third current transformer I3 are further included.

[0093] The first pressure-sensitive resistor R1 is arranged between the lower wiper arm of the wiper and the vehicle window, and is connected with the power supply at the first end and connected with the second pressure-sensitive resistor R2 at the second end.

[0094] The second pressure-sensitive resistor R2 is arranged between the upper wiper arm of the wiper and the vehicle window, and is connected with the third current transformer I3 at the second end.

[0095] The second end of the third current transformer I3 is connected with the negative line of the vehicle, and the output end is connected with the processor 32, and is used to detect the current value of the circuit in which the first pressure-sensitive resistor R1 and the second pressure-sensitive resistor R2 are arranged.

[0096] Please refer to Figure 5 , Figure 5 A structure diagram of the wiper is provided in the application.

[0097] In the embodiment, the pressure-sensitive resistor is arranged on the upper wiper arm and the lower wiper arm of the wiper respectively, and a series circuit is formed, so that whether the wiper is broken or whether the wiper has the floating failure can be judged according to the current value affected by the resistance value of the pressure-sensitive resistor in the series circuit, so as to ensure the normal operation of the wiper and the normal driving of the train.

[0098] It should be noted that the closer the wiper is attached to the vehicle window, the smaller the resistance value of the pressure-sensitive resistor, and the larger the current value detected by the third current transformer I3, and the less close the wiper is attached to the vehicle window, the larger the resistance value of the pressure-sensitive resistor, and the smaller the current value detected by the third current transformer I3.

[0099] The application further provides a train comprising the seat as described above.

[0100] For the train provided by the present application, please refer to the above-mentioned embodiments, and the present application will not be described here.

[0101] It is also necessary to point out that in the present specification, the relationship terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply that there is any such actual relationship or order between these entities or operations. Moreover, the terms "include", "contain" or any other variants thereof are intended to cover non-exclusive inclusion, so that the process, method, article or equipment including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such process, method, article or equipment. Without more limitations, the element defined by the statement "including a" does not exclude the existence of other identical elements in the process, method, article or equipment including the element.

[0102] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to these embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A method for detecting windshield wiper malfunctions, characterized in that, The positive input terminal of the motor control box is connected to the power supply via the windshield wiper button, and the negative input terminal is connected to the vehicle's negative wire via the windshield wiper button; the first terminal of the first current transformer is connected to the positive output terminal of the motor control box, and the second terminal is connected to the positive input terminal of the motor; the first terminal of the second current transformer is connected to the negative output terminal of the motor control box, and the second terminal is connected to the negative input terminal of the motor; the output terminal of the motor is connected to the transmission mechanism. The output end of the transmission mechanism is connected to the upper and lower wiper arms of the windshield wiper. The method includes: When the wiper button is pressed and the upper and lower wiper arms do not move normally, determine the current values ​​detected by the first current transformer and the second current transformer. The cause of the wiper malfunction is determined based on the current values ​​detected by the first current transformer and the second current transformer. Determining the cause of the wiper malfunction based on the current values ​​detected by the first current transformer and the second current transformer includes: When the first current transformer detects that the current value at the positive output terminal of the motor control box is 0, it determines that the motor control box is faulty. When the current value detected by the first current transformer is not 0, but the current value detected by the second current transformer at the negative input terminal of the motor control box is 0, the motor is determined to be faulty. When the current value detected by the first current transformer and the current value detected by the second current transformer are both not 0, but are less than the preset current value, the transmission mechanism is determined to be faulty. A first varistor is installed between the lower wiper arm and the windshield, and a second varistor is installed between the upper wiper arm and the windshield. The first end of the first varistor is connected to the power supply, the second end is connected to the second varistor, and the second end of the second varistor is connected to a third current transformer. The second end of the third current transformer is connected to the negative line of the vehicle. The method further includes: Determine whether the current value detected by the third current transformer is 0; If so, it is determined that the upper or lower wiper arm of the wiper has broken. After determining whether the current value detected by the third current transformer is 0, the process further includes: If the current value detected by the third current transformer is not 0, then it is determined whether the current value detected by the third current transformer is less than a preset value. If the value is less than the preset value, it is determined that the resistance of the first varistor and / or the second varistor has increased due to the wiper not being properly attached to the windshield, and thus the wiper is determined to be floating faulty. If the value is not less than the preset value, the windshield wiper is considered to be working properly.

2. The wiper malfunction detection method as described in claim 1, characterized in that, After determining whether the current value detected by the third current transformer is 0, the process further includes: If the wiper is determined to be broken, the user will be notified of the wiper breakage. If the windshield wiper is determined to be floating, the user will be notified of the windshield wiper floating malfunction.

3. The wiper malfunction detection method according to any one of claims 1-2, characterized in that, When the wiper button is pressed and the upper and lower wiper arms do not move normally, after determining the current values ​​detected by the first current transformer and the second current transformer, the process further includes: If the motor control box is determined to be faulty, the user will be prompted that the motor control box is faulty; If the motor is determined to be faulty, the user will be notified of the motor malfunction. If the transmission mechanism is determined to be faulty, the user will be prompted that the transmission mechanism is faulty.

4. A windshield wiper fault detection system, characterized in that, The positive input terminal of the motor control box is connected to the power supply via the windshield wiper button, and the negative input terminal is connected to the vehicle's negative wire via the windshield wiper button; the first terminal of the first current transformer is connected to the positive output terminal of the motor control box, and the second terminal is connected to the positive input terminal of the motor; the first terminal of the second current transformer is connected to the negative output terminal of the motor control box, and the second terminal is connected to the negative input terminal of the motor; the output terminal of the motor is connected to the transmission mechanism. The output end of the transmission mechanism is connected to the upper and lower wiper arms of the windshield wiper. The system includes: The first determining unit is used to determine the current value detected by the first current transformer and the second current transformer when the wiper button is pressed and the upper and lower wiper arms of the wiper do not move normally. The second determining unit is used to determine the cause of the wiper malfunction based on the current value detected by the first current transformer and the second current transformer. The second determining unit is specifically used for: When the first current transformer detects that the current value at the positive output terminal of the motor control box is 0, the motor control box is determined to be faulty; when the current value detected by the first current transformer is not 0, but the current value at the negative input terminal of the motor control box detected by the second current transformer is 0, the motor is determined to be faulty; when both the current value detected by the first current transformer and the current value detected by the second current transformer are not 0, but are less than a preset current value, the transmission mechanism is determined to be faulty. A first varistor is installed between the lower wiper arm and the windshield, and a second varistor is installed between the upper wiper arm and the windshield. The first end of the first varistor is connected to the power supply, the second end is connected to the second varistor, and the second end of the second varistor is connected to a third current transformer. The second end of the third current transformer is connected to the negative line of the vehicle. The system is also used to: determine whether the current value detected by the third current transformer is 0; if so, determine that the upper or lower wiper arm of the windshield wiper has a breakage fault; if the current value detected by the third current transformer is not 0, determine whether the current value detected by the third current transformer is less than a preset value; if it is less than the preset value, determine that the resistance of the first varistor and / or the second varistor has increased due to the windshield wiper not properly adhering to the windshield, and thus determine that the windshield wiper has a floating fault; if it is not less than the preset value, determine that the windshield wiper is normal.

5. A wiper fault detection device, characterized in that, include: Memory, used to store computer programs; A processor, configured to implement the steps of the wiper malfunction detection method as described in any one of claims 1 to 3 when executing the computer program.

6. The wiper fault detection device as described in claim 5, characterized in that, Also includes: A first current transformer, located between the positive output terminal of the motor control box and the positive input terminal of the motor, and whose output terminal is connected to the processor, is used to collect the current value between the positive output terminal of the motor control box and the positive input terminal of the motor. A second current transformer, located between the negative output terminal of the motor control box and the negative input terminal of the motor, and with its output terminal connected to the processor, is used to collect the current value between the negative output terminal of the motor control box and the negative input terminal of the motor.

7. The wiper fault detection device as described in claim 5, characterized in that, It also includes a first varistor, a second varistor, and a third current transformer; The first varistor is disposed between the lower wiper arm of the windshield wiper and the windshield, and its first end is connected to the power supply, and its second end is connected to the second varistor. The second varistor is disposed between the upper wiper arm of the windshield wiper and the windshield, and its second end is connected to the third current transformer; The second end of the third current transformer is connected to the negative line of the vehicle, and the output end is connected to the processor, used to detect the current value of the circuit where the first varistor and the second varistor are located.

8. A train, characterized in that, Includes the windshield wiper malfunction detection device as described in claims 5-7.

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