Windscreen wiper control circuit and windscreen wiper control system

Abstract

The utility model discloses a windscreen wiper control circuit and a windscreen wiper control system, and belongs to the technical field of automobile windscreen wiper control. The windscreen wiper control circuit comprises a driving switch module and a driving control module, the driving switch module comprises a plurality of driving transistors and a windscreen wiper motor, and the windscreen wiper motor is used for driving a target windscreen wiper to execute windscreen wiper operation; the driving control module is used for receiving a windscreen wiper control signal, and the windscreen wiper control signal comprises the moving speed of a target windscreen wiper; the driving switch module is electrically connected with the driving control module, and the driving control module is further used for determining a target transistor from the multiple driving transistors according to the windscreen wiper control signal and controlling the target transistor to be in a conducting state so as to control the windscreen wiper motor to drive the target windscreen wiper to execute windscreen wiper operation according to the moving speed corresponding to the windscreen wiper control signal. The windscreen wiper control circuit provided by the utility model can improve the durability and reliability of automobile windscreen wiper control, thereby prolonging the service life of the whole automobile function and improving the reliability of the whole automobile function.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile windshield wiper control, in particular to a windshield wiper control circuit and a windshield wiper control system. Background Art

[0002] At present, in the related technology, relays are usually used to drive the wiper motors of automobiles (such as internal combustion engine vehicles, new energy vehicles, etc.) to achieve control of the wiper. The relay mainly controls the wiper control circuit by closing and opening the contacts. However, the relay has poor impact and vibration resistance. There will be impact vibration during the whole vehicle journey, which can easily cause the relay to work abnormally, thereby affecting the performance of the car wiper control. In addition, the contacts of the relay will produce physical wear due to frequent switching actions, causing the relay's control performance of the wiper to gradually decrease with the increase of use time, which also limits the working life and reliability of the whole vehicle function. Therefore, how to improve the durability and reliability of the car wiper control has become a technical problem that needs to be solved urgently. Utility Model Content

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model proposes a wiper control circuit and a wiper control system, which can improve the durability and reliability of the automobile wiper control, thereby improving the working life and reliability of the vehicle function.

[0004] According to a first aspect of the present utility model, a wiper control circuit comprises:

[0005] A driving switch module, the driving switch module comprising a plurality of driving transistors and a wiper motor, the wiper motor being used to drive a target wiper to perform a wiping operation;

[0006] A drive control module is used to receive a wiper control signal, wherein the wiper control signal includes a moving speed of the target wiper; the drive switch module is electrically connected to the drive control module, and the drive control module is also used to determine a target transistor from the multiple drive transistors according to the wiper control signal, and control the target transistor to be in an on state, so as to control the wiper motor to drive the target wiper to perform a wiping operation at a moving speed corresponding to the wiper control signal.

[0007] According to a wiper control circuit of an embodiment of the utility model, there are at least the following beneficial effects: by setting a driving switch module to be electrically connected with a driving control module, a plurality of driving transistors are set in the driving switch module, and the driving control module is used to control the on or off state of different transistors in the plurality of driving transistors, so as to control the wiper motor to drive the target wiper to perform the wiper operation according to the moving speed corresponding to the wiper control signal. Therefore, the present application uses the on state of the target transistor to control the wiper motor to drive the target wiper to perform the wiper operation, which can effectively avoid the problem that the control performance of the wiper through the relay in the related technology gradually decreases with the increase of the use time, thereby improving the durability and reliability of the control of the automobile wiper, and further improving the working life and reliability of the whole vehicle function.

[0008] According to some embodiments of the present utility model, the driving switch module further includes a switch power supply unit, and the switch power supply unit is used to provide electrical energy to the driving switch module;

[0009] The plurality of driving transistors include a first driving transistor, a gate of the first driving transistor is electrically connected to a first connecting pin of the driving control module, a source of the first driving transistor is electrically connected to a low-speed driving interface of the wiper motor, and a drain of the first driving transistor is electrically connected to the switch power supply unit;

[0010] The drive control module is further configured to control the first drive transistor to be turned on when the wiper control signal indicates that the target wiper moves at a low speed, so as to control the wiper motor to drive the target wiper to perform a low-speed wiping operation.

[0011] According to some embodiments of the present utility model, the plurality of driving transistors further include a second driving transistor, a gate of the second driving transistor being electrically connected to a second connecting pin of the driving control module, a source of the second driving transistor being electrically connected to a high-speed driving interface of the wiper motor, and a drain of the second driving transistor being electrically connected to the switch power supply unit;

[0012] The drive control module is further configured to control the second drive transistor to be turned on when the wiper control signal indicates that the target wiper moves at a high speed, so as to control the wiper motor to drive the target wiper to perform a high-speed wiping operation.

[0013] According to some embodiments of the utility model, the plurality of driving transistors further include a third driving transistor and a fourth driving transistor, the gate of the third driving transistor being electrically connected to the third connecting pin of the driving control module, the source of the third driving transistor being grounded, and the drain of the third driving transistor being electrically connected to the high-speed driving interface of the wiper motor; the gate of the fourth driving transistor being electrically connected to the fourth connecting pin of the driving control module, the source of the fourth driving transistor being grounded, and the drain of the fourth driving transistor being electrically connected to the low-speed driving interface of the wiper motor;

[0014] The drive control module is further configured to control the third drive transistor and the fourth drive transistor to be turned on when the wiper control signal indicates that the target wiper stops moving, so as to control the wiper motor to drive the target wiper to perform a stop wiping operation.

[0015] According to some embodiments of the present utility model, the driving switch module further includes an anti-interference unit, the anti-interference unit is electrically connected to the plurality of driving transistors and is used to filter out voltage ripples output by the plurality of driving transistors;

[0016] The anti-interference unit includes a sixteenth capacitor and a seventeenth capacitor, one end of the sixteenth capacitor is electrically connected to the drain of the fourth driving transistor, and the other end of the sixteenth capacitor is electrically connected to the source of the fourth driving transistor; one end of the seventeenth capacitor is electrically connected to the drain of the third driving transistor, and the other end of the seventeenth capacitor is electrically connected to the source of the third driving transistor.

[0017] According to some embodiments of the present utility model, the driving switch module further includes:

[0018] A switch filter unit, the switch filter unit is electrically connected to the switch power supply unit, and the switch filter unit is used to filter out voltage ripple output by the switch power supply unit.

[0019] According to some embodiments of the present utility model, the switch filter unit includes:

[0020] A twenty-second capacitor, one end of which is electrically connected to the switch power supply unit, and the other end of which is grounded;

[0021] A twenty-third capacitor, one end of the twenty-third capacitor is connected to one end of the twenty-second capacitor, and the other end of the twenty-third capacitor is grounded.

[0022] According to some embodiments of the present utility model, the drive control module includes:

[0023] A drive power supply unit, the drive power supply unit is used to provide power to the drive control module;

[0024] A gate driver, the gate driver is electrically connected to the driving power supply unit, and the gate driver is used to receive a wiper control signal;

[0025] A driving filter unit is electrically connected to the gate driver and is used to filter out voltage ripple output by the gate driver.

[0026] According to some embodiments of the present utility model, the driving filter unit includes:

[0027] a thirteenth capacitor, one end of the thirteenth capacitor being electrically connected to the thirty-ninth pin of the gate driver, and the other end of the thirteenth capacitor being electrically connected to the fortieth pin of the gate driver;

[0028] a fourteenth capacitor, one end of the fourteenth capacitor being electrically connected to the fortieth pin of the gate driver, and the other end of the fourteenth capacitor being grounded;

[0029] A fifteenth capacitor, one end of the fifteenth capacitor is electrically connected to the thirty-ninth pin of the gate driver, and the other end of the fifteenth capacitor is grounded.

[0030] According to a second aspect of an embodiment of the utility model, a wiper control system comprises the wiper control circuit as described in the first aspect of the embodiment.

[0031] A wiper control system according to an embodiment of the utility model has at least the following beneficial effects: the wiper control system includes the above-mentioned wiper control circuit, and the rotation state of the target wiper can be quickly adjusted through the wiper control circuit built into the wiper control system, which can improve the durability and reliability of the automobile wiper control, thereby improving the working life and reliability of the entire vehicle function.

[0032] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] The present invention is further described below with reference to the accompanying drawings and embodiments, wherein:

[0034] Figure 1 A circuit diagram of the related technology provided by the embodiment of the utility model to realize the wiper control through a relay;

[0035] Figure 2 A schematic diagram of a wiper control circuit provided by an embodiment of the utility model;

[0036] Figure 3 Another specific structural schematic diagram of the wiper control circuit provided by the embodiment of the utility model;

[0037] Figure 4 Another specific structural schematic diagram of the wiper control circuit provided by the embodiment of the utility model;

[0038] Figure 5 A specific circuit diagram of a drive control module provided by an embodiment of the utility model;

[0039] Figure 6 A specific circuit diagram of a driving switch module provided in an embodiment of the utility model.

[0040] Figure numerals: driving switch module 100, driving control module 200, multiple driving transistors 101, wiper motor 102, switch power supply unit 103, anti-interference unit 104, switch filter unit 105, driving power supply unit 201, gate driver 202, driving filter unit 203. DETAILED DESCRIPTION

[0041] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0042] In the description of the present invention, it should be understood that descriptions involving orientation, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0043] In the description of the present utility model, "several" means more than one, "many" means more than two, "greater than", "less than", "exceed" etc. are understood to exclude the number itself, and "above", "below", "within" etc. are understood to include the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0044] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0045] In the description of the utility model, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0046] First, some nouns involved in this application are analyzed:

[0047] Metal-Oxide-Semiconductor Field-Effect Transistor (MOSFET): referred to as "MOS tube", is a semiconductor device that uses electric field effect to control the flow of current.

[0048] Gate driver: An electronic device used to control the switching behavior of power switching devices such as MOSFET and Insulated Gate Bipolar Transistor (IGBT). Gate drivers can provide appropriate voltage and current to quickly and accurately turn on and off power switching devices such as MOSFET and IGBT.

[0049] KL30 power supply: It is a power line that is directly connected to the positive pole of the car battery. It can provide a stable working voltage for various devices in the car, and it can usually be between 11 volts (V) and 15 V. Among them, KL is the abbreviation of the connector term "klemme".

[0050] At present, in the related technology, relays are usually used to drive the wiper motors of automobiles (such as internal combustion engine vehicles, new energy vehicles, etc.) to achieve control of the wiper. The relay mainly controls the wiper control circuit by closing and opening the contacts. However, the relay has poor impact and vibration resistance. There will be impact vibration during the whole vehicle journey, which can easily cause the relay to work abnormally, thereby affecting the performance of the car wiper control. In addition, the contacts of the relay will produce physical wear due to frequent switching actions, causing the relay's control performance of the wiper to gradually decrease with the increase of use time, which also limits the working life and reliability of the whole vehicle function. Therefore, how to improve the durability and reliability of the car wiper control has become a technical problem that needs to be solved urgently.

[0051] Specifically, refer to Figure 1 , the embodiment of the present application provides a circuit diagram of a related art using a relay to realize wiper control. The circuit based on the relay to realize wiper control may specifically include: a bus, two power supplies (e.g. Figure 1 The circuit in can be connected to the KL30 power line, and the KL30 power line is used as a power source), relay K1, relay K2 and wiper motor M. Among them, relay K1 includes five pins, namely the first pin P11, the second pin P12, the third pin P13, the fourth pin P14 and the fifth pin P15. Relay K2 also includes five pins, namely the sixth pin P21, the seventh pin P22, the eighth pin P23, the ninth pin P24 and the tenth pin P25. The wiper motor M includes three interfaces, namely a low-speed drive interface, a high-speed drive interface and a grounding port. Specifically, the bus is electrically connected to the fourth pin P14 of relay K1 and the ninth pin P24 of relay K2, and the power supply KL30 of the left circuit part is electrically connected to the fifth pin P15 of relay K1 and the tenth pin P25 of relay K2. The coil of relay K1 is located between the fourth pin P14 of relay K1 and the fifth pin P15 of relay K1. Similarly, the coil of relay K2 is located between the ninth pin P24 of relay K2 and the tenth pin P25 of relay K2. The power supply KL30 of the left circuit part is used to supply power to the coil of relay K1 and the coil of relay K2. The first pin P11 of relay K1 is electrically connected to the high-speed drive interface of wiper motor M, the second pin P12 of relay K1 is electrically connected to the low-speed drive interface of wiper motor M, and the grounding port of wiper motor M is grounded. The sixth pin P21 of relay K2 is electrically connected to the power supply KL30 of the right circuit part, the seventh pin P22 of relay K2 is grounded, and the eighth pin P23 of relay K2 is electrically connected to the third pin P13 of relay K1.

[0052] The wiper drive circuit of the related art automobile (traditional fuel vehicle and new energy vehicle) usually uses two relays to control the high speed and low speed of the wiper motor. When the wiper low speed signal is valid, the drive relay K2 is closed and the wiper motor will rotate at a low speed. When both the wiper low speed signal and the wiper high speed signal are valid, the wiper motor rotates at a high speed. When both the wiper low speed signal and the wiper high speed signal are invalid, the wiper motor does not rotate or stops rotating.

[0053] For example, when the bus does not input a signal, the second pin P12 of relay K1 and the third pin P13 of relay K1 are internally closed and connected, and the seventh pin P22 of relay K2 and the eighth pin P23 of relay K2 are internally closed and connected. At this time, since the low-speed drive interface of the wiper motor M sequentially connects the second pin P12 of relay K1, the third pin P13 of relay K1, the eighth pin P23 of relay K2, and the seventh pin P22 of relay K2 to the ground, and the ground port of the wiper motor M is also grounded, the wiper motor M does not operate. For another example, when the bus only inputs a wiper low-speed signal to the ninth pin P24 of relay K2, the sixth pin P21 of relay K2 and the eighth pin P23 of relay K2 are internally closed and connected, and the second pin P12 of relay K1 and the third pin P13 of relay K1 are internally closed and connected. At this time, Figure 1 The current output by the power supply KL30 in the circuit sequentially passes through the sixth pin P21 of the relay K2, the eighth pin P23 of the relay K2, the third pin P13 of the relay K1, and the second pin P12 of the relay K1 to the low-speed drive interface of the wiper motor M. The grounding port of the wiper motor M is grounded, and the wiper motor M can achieve low-speed operation. For another example, when the bus inputs a wiper high-speed signal to the fourth pin P14 of the relay K1, and the bus simultaneously inputs a wiper low-speed signal to the ninth pin P24 of the relay K2, the closing of the internal contacts of the relay K1 is manifested as the internal conduction of the first pin P11 of the relay K1 and the third pin P13 of the relay K1. At this time, the closing of the internal contacts of the relay K2 is manifested as the internal conduction of the sixth pin P21 of the relay K2 and the eighth pin P23 of the relay K2, that is, Figure 1 The power supply KL30 in the wiper motor M passes through the sixth pin P21 of the relay K2, the eighth pin P23 of the relay K2, the third pin P13 of the relay K1, and the first pin P11 of the relay K1 to the high-speed driving interface of the wiper motor M. The grounding port of the wiper motor M is grounded, and the wiper motor M runs at high speed.

[0054] The related technology uses relays to drive car wipers, which has the following problems: 1. The electrical durability rating of mechanical relays is usually 100,000 cycles. After exceeding this rated number of cycles, the contacts may be damaged, and their reliability is seriously affected, thereby increasing the risk of failure; 2. When relay control is used, there will be noise when the contacts are opened and closed, which affects the experience of drivers and passengers; 3. The relay has poor resistance to impact and vibration. During the entire vehicle journey, there will inevitably be impact and vibration, which will cause the relay to work abnormally; 4. When relay control is used, due to the relay Both the primary coil and the secondary contact consume energy during operation, resulting in greater power consumption when the wiper is driven by a relay; ⑤. Due to the characteristics of the relay coil itself, its closing voltage and opening voltage are sensitive to temperature changes, resulting in higher environmental requirements; ⑥. When using relay control, in order to prevent short circuit and open circuit failures, the circuit design is often more complicated, which means that the wiper's response time is at least 50 milliseconds (ms), which is slow and not flexible enough; ⑦. Since the relay itself is large in size, it occupies a large board area when using relay control, that is, it occupies a large space inside the car.

[0055] Based on this, refer to Figure 2 , an embodiment of the present application provides a structural schematic diagram of a wiper control circuit, and the wiper control circuit includes a drive switch module 100 and a drive control module 200. Among them, the drive switch module 100 includes multiple drive transistors and a wiper motor, and the wiper motor is used to drive the target wiper to perform a wiper operation. The drive control module 200 is used to receive a wiper control signal, and the wiper control signal includes a moving speed of the target wiper. The drive switch module 100 is electrically connected to the drive control module 200, and the drive control module 200 is also used to determine a target transistor from a plurality of drive transistors according to the wiper control signal, and control the target transistor to be in a conductive state, so as to control the wiper motor to drive the target wiper to perform a wiper operation according to the moving speed corresponding to the wiper control signal.

[0056] The embodiment of the present application sets a driving switch module to be electrically connected with a driving control module, sets a plurality of driving transistors in the driving switch module, and uses the driving control module to control the on or off state of different transistors in the plurality of driving transistors, so as to control the wiper motor to drive the target wiper to perform the wiper operation according to the moving speed corresponding to the wiper control signal. Therefore, the present application uses the on state of the target transistor to control the wiper motor to drive the target wiper to perform the wiper operation, which can effectively avoid the problem that the control performance of the wiper through the relay in the related art gradually decreases with the increase of the use time, thereby improving the durability and reliability of the control of the automobile wiper, and further improving the working life and reliability of the whole vehicle function.

[0057] Reference Figure 3, an embodiment of the present application provides another structural schematic diagram of a wiper control circuit, where a driving switch module 100 includes a plurality of driving transistors 101, a wiper motor 102, a switch power supply unit 103, an anti-interference unit 104 and a switch filter unit 105.

[0058] It should be noted that the switch power supply unit 103 is used to provide power to the drive switch module 100. The switch filter unit 105 is electrically connected to the switch power supply unit 103, and the switch filter unit 105 is used to filter out the voltage ripple output by the switch power supply unit 103. The switch filter unit 105 is also electrically connected to the plurality of drive transistors 101. The anti-interference unit 104 is electrically connected to the plurality of drive transistors 101, and is used to filter out the voltage ripple output by the plurality of drive transistors 101. The anti-interference unit 104 is electrically connected to the wiper motor 102, and the anti-interference unit 104 is also used to prevent static electricity from entering the wiper motor 102, thereby playing an anti-interference role.

[0059] In some embodiments, Figure 3 As shown, the drive control module 200 includes a drive power supply unit 201, a gate driver 202 and a drive filter unit 203. The drive power supply unit 201 is used to provide power to the drive control module 200. The gate driver 202 is electrically connected to the drive power supply unit 201, and the gate driver 202 is used to receive a wiper control signal. The drive filter unit 203 is electrically connected to the gate driver 202, and the drive filter unit 203 is used to filter the voltage ripple output by the gate driver 202.

[0060] Reference Figure 4 , an embodiment of the present application provides a specific structural diagram of a wiper control circuit. The wiper control circuit includes a gate driver, multiple driving transistors, a wiper motor M, a sampling resistor and a switch power supply unit, and the multiple driving transistors may specifically include a first driving transistor Q1, a second driving transistor Q2, a third driving transistor Q3, and a fourth driving transistor Q4, and the switch power supply unit may be a power supply KL30. Among them, a microcontroller unit (Microcontroller Unit, MCU) can be used to send a wiper control signal to the gate driver in the wiper control circuit, and the gate driver and the MCU are connected by a serial communication protocol (Serial Peripheral Interface, SPI). Therefore, the MCU can accept control instructions sent from the user through a computer device, and convert the control instructions into wiper control signals through SPI and output them to the gate driver, so that the gate driver performs corresponding operations according to the wiper control signal.

[0061] Specifically, the gate controller is electrically connected to the gate of the first drive transistor Q1, the gate of the second drive transistor Q2, the gate of the third drive transistor Q3, and the gate of the fourth drive transistor Q4, respectively. The power supply KL30 is electrically connected to one end of the sampling resistor, and the other end of the sampling resistor is electrically connected to the drain of the first drive transistor Q1. The sampling resistor can be used to collect the voltage in the circuit. The drain of the first drive transistor Q1 is electrically connected to the drain of the second drive transistor Q2, and the source of the first drive transistor Q1 is electrically connected to the low-speed drive interface of the wiper motor M. The source of the second drive transistor Q2 is electrically connected to the high-speed drive interface of the wiper motor M. The drain of the third drive transistor Q3 is electrically connected to the high-speed drive interface of the wiper motor M and the source of the second drive transistor Q2, and the source of the third drive transistor Q3 is grounded. The drain of the fourth drive transistor Q4 is electrically connected to the low-speed drive interface of the wiper motor M and the source of the first drive transistor Q1, and the source of the fourth drive transistor Q4 is grounded.

[0062] It should be noted that the first driving transistor Q1 , the second driving transistor Q2 , the third driving transistor Q3 , and the fourth driving transistor Q4 may all be N-channel enhancement type MOS transistors, which are not limited here.

[0063] It should be noted that, in some embodiments, the model of the gate driver can be TLE9210-232, or other chips that can drive multiple drive transistors, which is not limited here. The gate driver cooperates with 4 power MOS tubes to form a wiper control circuit to achieve high-speed and low-speed regulation and control of the target wiper. Among them, it should be noted that the gate driver has an intelligent handshake protocol, that is, the first drive transistor Q1 and the fourth drive transistor Q4 cannot be turned on at the same time, and the second drive transistor Q2 and the third drive transistor Q3 cannot be turned on at the same time, to prevent the two directly connected MOS tubes from burning out directly.

[0064] In some embodiments, when the MCU receives a low-speed wiper start command from the user, the MCU sends a wiper control signal corresponding to the low-speed wiper command to the gate driver via SPI. After the gate driver receives the wiper control signal corresponding to the low-speed wiper command, the gate driver outputs a voltage to reduce the voltage V between the gate and source of the first driving transistor Q1. GS1Pull it up to 10V, so that the first drive transistor Q1 is turned on. After the first drive transistor Q1 is turned on, the power supply voltage of the power supply KL30 passes through the sampling resistor to the first drive transistor Q1, and then passes through the low-speed drive interface of the wiper motor M to the ground, and then the wiper motor M drives the target wiper to perform the wiping operation at a low speed. It should be noted that after the gate driver receives the wiper control signal corresponding to the low-speed wiper instruction, the gate driver does not output voltage to the second drive transistor Q2, the third drive transistor Q3 and the fourth drive transistor Q4, that is, when the target wiper is running at a low speed, the second drive transistor Q2, the third drive transistor Q3 and the fourth drive transistor Q4 are all in the cut-off state.

[0065] In some embodiments, when the MCU receives a high-speed wiper start command from the user, the MCU sends a wiper control signal corresponding to the high-speed wiper command to the gate driver via SPI. After the gate driver receives the wiper control signal corresponding to the high-speed wiper command, the gate driver outputs a voltage to increase the voltage V between the gate and source of the second driving transistor Q2. GS2 Pull it up to 10V, so that the second drive transistor Q2 is turned on. After the second drive transistor Q2 is turned on, the power supply voltage of the power supply KL30 passes through the sampling resistor to the second drive transistor Q2, and then passes through the high-speed drive interface of the wiper motor M to the ground, and then the wiper motor M drives the target wiper to perform the wiping operation at high speed. It should be noted that after the gate driver receives the wiper control signal corresponding to the high-speed wiper instruction, the gate driver does not output voltage to the first drive transistor Q1, the third drive transistor Q3 and the fourth drive transistor Q4, that is, when the target wiper is running at high speed, the first drive transistor Q1, the third drive transistor Q3 and the fourth drive transistor Q4 are all in the cut-off state.

[0066] In some embodiments, when the MCU receives a command from the user to turn off the wiper, the MCU sends a wiper control signal corresponding to the command to the gate driver via SPI. After the gate driver receives the wiper control signal corresponding to the command to turn off the wiper, the gate driver outputs a voltage to increase the voltage V between the gate and source of the third driving transistor Q3. GS3 The voltage V between the gate and source of the fourth driving transistor Q4 is pulled up to 10V, thereby turning on the third driving transistor Q3; at the same time, the gate driver outputs a voltage to increase the voltage V between the gate and source of the fourth driving transistor Q4 GS4Pull up to 10V, so that the fourth drive transistor Q4 is turned on. When the third drive transistor Q3 and the fourth drive transistor Q4 are both turned on, the high-speed drive interface and the low-speed drive interface of the wiper motor M are grounded through the third drive transistor Q3 and the fourth drive transistor Q4 respectively, so that the target wiper is in a stopped state. It should be noted that after the gate driver receives the wiper control signal corresponding to the wiper off instruction, the gate driver does not output voltage to the first drive transistor Q1 and the second drive transistor Q2, that is, when the target wiper stops running, the first drive transistor Q1 and the second drive transistor Q2 are both in a cut-off state.

[0067] The embodiment of the present application uses a gate driver plus a power MOS tube to drive the wiper motor at high speed and low speed. Since multiple MOS tubes are used to control the wiper motor, flexible wiper control can be achieved and faults such as open circuit and short circuit of the wiper motor can be avoided.

[0068] Reference Figure 5 , the embodiment of the present application provides a specific circuit diagram of a drive control module. The drive control module 200 includes a drive power supply unit 201, a gate driver 202 and a drive filter unit 203. The drive power supply unit 201 includes a power supply KL30M_REVERSE and a ninth resistor R9, one end of the ninth resistor R9 is electrically connected to the power supply KL30M_REVERSE, and the other end of the ninth resistor R9 is electrically connected to the fifth pin of the gate driver.

[0069] It should be noted that the power supply KL30M_REVERSE is used to supply power to the gate driver. The ninth resistor R9 may be a resistor with a resistance of 2.2 ohms (Ω) and an accuracy of 1%, and the ninth resistor R9 may be used to test the current size in the circuit.

[0070] It should be noted that in the field of electronic components, the 0603 model is usually the package size of the surface mount technology (SMT). The standard size of the 0603 package model is approximately 0.6 millimeters (mm) in length, 0.3mm in width, and approximately 0.2mm in thickness (the specific size may vary slightly depending on the manufacturer and standard). Similarly, the 0805 model and the 0402 model are the other two package sizes of SMT. Among them, the standard size of the 0805 package model is approximately 2.0mm in length, 1.25mm in width, and approximately 0.8mm in thickness. The standard size of the 0402 package model is approximately 0.4mm in length, 0.3mm in width, and approximately 0.2mm in thickness. The ninth resistor can adopt the package size of the 0603 package model.

[0071] The gate driver 202 is used to receive the wiper control signal. The first connection pin of the drive control module may be the first pin of the gate driver, the second connection pin of the drive control module may be the 47th pin of the gate driver, the third connection pin of the drive control module may be the 44th pin of the gate driver, and the fourth connection pin of the drive control module may be the 45th pin of the gate driver.

[0072] The driving filter unit 203 includes a thirteenth capacitor C13, a fourteenth capacitor C14 and a fifteenth capacitor C15. One end of the thirteenth capacitor C13 is electrically connected to the thirty-ninth pin of the gate driver, and the other end of the thirteenth capacitor C13 is electrically connected to the fortieth pin of the gate driver. One end of the fourteenth capacitor C14 is electrically connected to the fortieth pin of the gate driver, and the other end of the fourteenth capacitor C14 is grounded. One end of the fifteenth capacitor C15 is electrically connected to the thirty-ninth pin of the gate driver, and the other end of the fifteenth capacitor C15 is grounded. Among them, the thirteenth capacitor C13, the fourteenth capacitor C14 and the fifteenth capacitor C15 can all adopt the package size of the 0402 package model. The circuit structure composed of the thirteenth capacitor C13 can filter out the differential mode signal output by the gate driver; the circuit structure composed of the fourteenth capacitor C14 and the fifteenth capacitor C15 can filter out the common mode signal output by the gate driver. The CSIP1 interface is electrically connected to the thirty-ninth pin of the gate driver, and the CSIN1 interface is electrically connected to the fortieth pin of the gate driver. The differential mode filter structure formed by the thirteenth capacitor C13 and the common mode filter structure formed by the fourteenth capacitor C14 and the fifteenth capacitor C15 can make the voltage output by the CSIP1 interface and the CSIN1 interface more stable.

[0073] The drive control module 200 also includes a third capacitor C3 to a twelfth capacitor C12, a twelfth resistor R12 to a twenty-first resistor R21, and a twenty-seventh resistor R27. Among them, one end of the third capacitor C3 is electrically connected to the other end of the ninth resistor R9, and the other end of the third capacitor C3 is grounded. The third capacitor C3 can filter out the voltage ripple in the circuit. One end of the seventh capacitor C7 is electrically connected to the other end of the ninth resistor R9, and the other end of the seventh capacitor C7 is electrically connected to the fourth pin of the gate driver, and the seventh capacitor C7 is used for filtering. The other end of the seventh capacitor C7 is electrically connected to one end of the twenty-seventh resistor R27, and the other end of the twenty-seventh resistor R27 is connected to the power supply VCP3. One end of the fifth capacitor C5 is electrically connected to the sixth pin of the gate driver, and the other end of the fifth capacitor C5 is electrically connected to the seventh pin of the gate driver. One end of the sixth capacitor C6 is electrically connected to the eighth pin of the gate driver, and the other end of the sixth capacitor C6 is electrically connected to the ninth pin of the gate driver. One end of the fourth capacitor C4 is electrically connected to the thirty-first pin of the gate driver, and the other end of the fourth capacitor C4 is grounded. The power supply 5V_VAUX is electrically connected to the thirty-first pin of the gate driver. One end of the thirteenth resistor R13 is electrically connected to the twenty-first pin of the gate driver, and the other end of the thirteenth resistor R13 is electrically connected to the interface MCU_SPI0_SIN. One end of the fourteenth resistor R14 is electrically connected to the twenty-second pin of the gate driver, and the other end of the fourteenth resistor R14 is electrically connected to the interface MCU_SPI0_PCS0. One end of the fifteenth resistor R15 is electrically connected to the twenty-ninth pin of the gate driver, and the other end of the fifteenth resistor R15 is electrically connected to the interface MCU_SPI0_SCK. One end of the sixteenth resistor R16 is electrically connected to the thirty-fourth pin of the gate driver, and the other end of the sixteenth resistor R16 is electrically connected to the interface MCU_SPI0_SOUT. One end of the seventeenth resistor R17 is electrically connected to the twentieth pin of the gate driver, and the other end of the seventeenth resistor R17 is electrically connected to the interface MCU_92108_EN. One end of the eighteenth resistor R18 is electrically connected to the forty-sixth pin of the gate driver, and the other end of the eighteenth resistor R18 is electrically connected to the interface MCU_92108_PWM1. One end of the nineteenth resistor R19 is electrically connected to the forty-first pin of the gate driver, and the other end of the nineteenth resistor R19 is electrically connected to the interface MCU_92108_PWM2. One end of the twentieth resistor R20 is electrically connected to the third pin of the gate driver, and the other end of the twentieth resistor R20 is electrically connected to the interface MCU_92108_PWM3. One end of the twelfth resistor R12 is electrically connected to the thirty-third pin of the gate driver, and the other end of the twelfth resistor R12 is electrically connected to the interface MCU_92108_SO1. One end of the eighth capacitor C8 is electrically connected to the other end of the twelfth resistor R12, and the other end of the eighth capacitor C8 is grounded. The eighth capacitor C8 is used for filtering.One end of the twenty-first resistor R21 is electrically connected to the 30th pin of the gate driver, and the other end of the twenty-first resistor R21 is electrically connected to the interface MCU_92108_SO2. One end of the ninth capacitor C9 is electrically connected to the other end of the twenty-first resistor R21, and the other end of the ninth capacitor C9 is grounded, and the ninth capacitor C9 is used for filtering. The thirty-second pin of the gate driver is electrically connected to the forty-ninth pin of the gate driver and then grounded. One end of the tenth capacitor C10 is electrically connected to the twenty-seventh pin of the gate driver, and the other end of the tenth capacitor C10 is electrically connected to the twenty-eighth pin of the gate driver. One end of the eleventh capacitor C11 is electrically connected to the twenty-eighth pin of the gate driver, and the other end of the eleventh capacitor C11 is grounded. One end of the twelfth capacitor C12 is electrically connected to the twenty-seventh pin of the gate driver, and the other end of the twelfth capacitor C12 is grounded. The CSIP2 interface is electrically connected to the twenty-seventh pin of the gate driver, and the CSIN2 interface is electrically connected to the twenty-eighth pin of the gate driver.

[0074] It should be noted that the third capacitor C3, the fifth capacitor C5 and the sixth capacitor C6 can all be capacitors with a capacitance value of 100 nanofarads (nF), a maximum withstand voltage of 50V, and a package size of 0603 package model. The fourth capacitor C4 can be a capacitor with a capacitance value of 100nF, a maximum withstand voltage of 50V, and a package size of 0402 package model. The seventh capacitor C7 can be a capacitor with a capacitance value of 1nF, a maximum withstand voltage of 50V, and a package size of 0805 package model. The eighth capacitor C8 and the ninth capacitor C9 can both be capacitors with a capacitance value of 100nF, a maximum withstand voltage of 50V, and a package size of 0402 package model. The tenth capacitor C10 to the twelfth capacitor C12 can all be capacitors with a package size of 0402 package model. The twelfth resistor R12 and the twenty-first resistor R21 can both be resistors with a resistance value of 47kΩ, an accuracy of 1%, and a package size of 0402 package model. The thirteenth resistor R13 to the sixteenth resistor R16 can all be resistors with a resistance value of 22Ω, a precision of 1%, and a package size of 0402. The thirteenth resistor R13 to the sixteenth resistor R16 can achieve the functions of current limiting and signal matching. The seventeenth resistor R17 to the twentieth resistor R20 and the twenty-seventh resistor R27 can all be resistors with a resistance value of 1kΩ, a precision of 1%, and a package size of 0402.

[0075] It should be noted that the 37th pin of the gate driver, the 38th pin of the gate driver, the 43rd pin of the gate driver, the 35th pin of the gate driver, the 36th pin of the gate driver, the 42nd pin of the gate driver, the 25th pin of the gate driver, the 26th pin of the gate driver, the 19th pin of the gate driver, the 23rd pin of the gate driver, the 24th pin of the gate driver, the 18th pin of the gate driver, the 13th pin of the gate driver, the 14th pin of the gate driver, the 17th pin of the gate driver, the 11th pin of the gate driver, the 12th pin of the gate driver and the 16th pin of the gate driver are all suspended. The 15th pin of the gate driver is grounded. Interface MCU_SPI0_SIN, interface MCU_SPI0_PCS0, interface MCU_SPI0_SCK, interface MCU_SPI0_SOUT, interface MCU_92108_EN, interface MCU_92108_PWM1, interface MCU_92108_PWM2, interface MCU_92108_PWM3, interface MCU_92108_SO1 and interface MCU_92108_SO2 can be electrically connected to the MCU to receive the wiper control signal from the MCU. The CSIP2 interface and the CSIN2 interface can be electrically connected to the motor that performs other functions so that the gate driver drives other motors to achieve different functions.

[0076] Reference Figure 6 The embodiment of the present application provides a specific circuit diagram of a driving switch module. The driving switch module 100 includes a plurality of driving transistors 101, a wiper motor 102, a switch power supply unit 103, an anti-interference unit 104 and a switch filter unit 105.

[0077] The first driving transistor Q1 , the second driving transistor Q2 , the third driving transistor Q3 and the fourth driving transistor included in the plurality of driving transistors 101 may all be MOS transistors of type Q4QNMOSDFN5060-8L and model ZMSA012N06HNC.

[0078] The wiper motor 102 includes a low-speed drive interface, a high-speed drive interface and a grounding port, wherein the low-speed drive interface is an interface L2_WIPER_FAST_PWR, and the high-speed drive interface is an interface L2_WIPER_SLOW_PWR. The transient response of the wiper motor can be 30 amperes (A) and 40ms. When the wiper motor runs at a low speed, the operating current can be 8A; when the wiper motor runs at a high speed, the operating current can be 15A.

[0079] The switch power supply unit 103 includes a power supply KL30M, a sampling resistor R26, a tenth resistor R10 and an eleventh resistor R11. One end of the sampling resistor R26 is electrically connected to the power supply KL30M, and the other end of the sampling resistor R26 is electrically connected to the drain of the first driving transistor Q1. One end of the tenth resistor R10 is electrically connected to the CSIP1 interface, and the other end of the tenth resistor R10 is electrically connected to one end of the sampling resistor R26. One end of the eleventh resistor R11 is electrically connected to the CSIN1 interface, and the other end of the eleventh resistor R11 is electrically connected to the other end of the sampling resistor R26. It should be noted that the power supply KL30M can be the same as the above-mentioned power supply KL30M_REVERSE. The sampling resistor R26 can be a resistor with a resistance of 3mR (i.e., 0.003Ω), an accuracy of 1%, and a model of HOJLR2512. The tenth resistor R10 and the eleventh resistor R11 can both be resistors of 0R and a package size of 0402 package model. The power supply KL30M is used to supply power to the drive switch module, and the sampling resistor R26 is used to monitor the current in the circuit, which can keep the current in the circuit within a normal range, thereby ensuring that multiple drive transistors and wiper motors are not burned. The sampling resistor R26 can also be used to measure the current in the circuit when the wiper motor is running at high speed and low speed respectively. The tenth resistor R10 and the eleventh resistor R11 are used to limit the current, so that the sampling resistor R26 is not damaged by excessive current.

[0080] The anti-interference unit 104 includes a sixteenth capacitor C16 and a seventeenth capacitor C17. One end of the sixteenth capacitor C16 is electrically connected to the drain of the fourth drive transistor, the other end of the sixteenth capacitor C16 is electrically connected to the source of the fourth drive transistor, and the other end of the sixteenth capacitor C16 is grounded. One end of the seventeenth capacitor C17 is electrically connected to the drain of the third drive transistor Q3, the other end of the seventeenth capacitor C17 is electrically connected to the source of the third drive transistor Q3, and the other end of the seventeenth capacitor C17 is grounded. It should be noted that the sixteenth capacitor C16 and the seventeenth capacitor C17 can both be capacitors with a capacitance value of 100 nanofarads (nF), a maximum withstand voltage of 50V, and a package size of 0603 package model. The sixteenth capacitor C16 and the seventeenth capacitor C17 can be used to prevent static electricity from entering the wiper motor 102, and play an anti-interference role.

[0081] The switch filter unit 105 includes a twenty-second capacitor C22 and a twenty-third capacitor C23. Among them, one end of the twenty-second capacitor C22 is electrically connected to the other end of the sampling resistor R26, and the other end of the twenty-second capacitor C22 is grounded. One end of the twenty-third capacitor C23 is connected to one end of the twenty-second capacitor C22, and the other end of the twenty-third capacitor C23 is grounded. It should be noted that the twenty-second capacitor C22 and the twenty-third capacitor C23 can both be capacitors with a capacitance value of 1 microfarad (uF), a maximum withstand voltage of 50V, and a package size of 0805 package model. The twenty-second capacitor C22 can filter out the voltage ripple entering the first drive transistor Q1, and the twenty-third capacitor C23 can filter out the voltage ripple entering the second drive transistor Q2.

[0082] The driving switch module 100 also includes a twenty-third resistor R23 and a twenty-fifth resistor R25. One end of the twenty-third resistor R23 is electrically connected to the second pin of the gate driver, and the other end of the twenty-third resistor R23 is electrically connected to the low-speed drive interface of the wiper motor 102. The twenty-third resistor R23 can monitor the current entering the low-speed drive interface of the wiper motor 102. One end of the twenty-fifth resistor R25 is electrically connected to the forty-eighth pin of the gate driver, and the other end of the twenty-fifth resistor R25 is electrically connected to the high-speed drive interface of the wiper motor 102. The twenty-fifth resistor R25 can monitor the current entering the high-speed drive interface of the wiper motor 102. The twenty-third resistor R23 and the twenty-fifth resistor R25 can both be resistors with a package size of 10Ω and a package model of 0402.

[0083] Please refer to Figure 5 and Figure 6 The gate of the first driving transistor Q1 is electrically connected to the first pin of the gate driver, the source of the first driving transistor Q1 is electrically connected to the low-speed driving interface of the wiper motor, and the drain of the first driving transistor Q1 is electrically connected to the other end of the sampling resistor R26. The gate driver receives the wiper control signal from the MCU, and when the wiper control signal indicates that the target wiper moves at a low speed, the output voltage makes the voltage V between the gate and the source of the first driving transistor Q1 GS1 When the voltage is pulled up to 10V, the first driving transistor Q1 is turned on to control the wiper motor to drive the target wiper to perform a low-speed wiper operation. At this time, the second driving transistor Q2, the third driving transistor Q3 and the fourth driving transistor Q4 are all in the off state.

[0084] The gate of the second driving transistor Q2 is electrically connected to the 47th pin of the gate driver, the source of the second driving transistor Q2 is electrically connected to the high-speed driving interface of the wiper motor, and the drain of the second driving transistor Q2 is electrically connected to the other end of the sampling resistor R26. The gate driver receives the wiper control signal from the MCU, and when the wiper control signal indicates that the target wiper moves at a high speed, the output voltage makes the voltage V between the gate and the source of the second driving transistor Q2 GS2 When the voltage is pulled up to 10V, the second driving transistor Q2 is turned on to control the wiper motor to drive the target wiper to perform a high-speed wiper operation. At this time, the first driving transistor Q1, the third driving transistor Q3 and the fourth driving transistor Q4 are all in the off state.

[0085] The gate of the third driving transistor Q3 is electrically connected to the 44th pin of the gate driver, the source of the third driving transistor Q3 is grounded, and the drain of the third driving transistor Q3 is electrically connected to the high-speed driving interface of the wiper motor. The gate of the fourth driving transistor Q4 is electrically connected to the 45th pin of the gate driver, the source of the fourth driving transistor Q4 is grounded, and the drain of the fourth driving transistor Q4 is electrically connected to the low-speed driving interface of the wiper motor.

[0086] The gate driver is also used to output a voltage so that the voltage V between the gate and the source of the third driving transistor Q3 is greater than 100V when the wiper control signal indicates that the target wiper stops moving. GS3 Pulled up to 10V, the voltage V between the gate and source of the fourth driving transistor Q4 GS4 Pulling up to 10V, that is, controlling the third driving transistor Q3 and the fourth driving transistor Q4 to be turned on at the same time, so as to control the wiper motor to drive the target wiper to perform the stop wiping operation. At this time, the first driving transistor Q1 and the second driving transistor Q2 are both in the off state.

[0087] It should be noted that because the fourth drive transistor Q4 is electrically connected to the low-speed drive interface of the wiper motor, when the gate driver turns on the fourth drive transistor Q4 alone, the low-speed drive interface of the wiper motor can be grounded through the fourth drive transistor Q4, and the wiper motor stops running at a low speed.

[0088] It should be noted that because the third drive transistor Q3 is electrically connected to the high-speed drive interface of the wiper motor, when the gate driver turns on the third drive transistor Q3 alone, the high-speed drive interface of the wiper motor can be grounded through the third drive transistor Q3, and the wiper motor stops running at high speed.

[0089] In some embodiments, if the speed of the current target wiper to perform the wiping operation is known, the wiper motor can be turned off by controlling the conduction of the corresponding drive transistor. Specifically, if the speed of the target wiper to perform the wiping operation is low speed, the gate driver can be controlled to conduct the fourth drive transistor Q4 alone to turn off the wiper motor; if the target wiper is to perform a high-speed wiping operation, the gate driver can be controlled to conduct the third drive transistor Q3 alone to turn off the wiper motor.

[0090] In summary, when the gate driver turns on the third driving transistor Q3 and the fourth driving transistor Q4 at the same time, the wiper motor can be turned off regardless of whether the wiper motor is currently in a low-speed operation state, a high-speed operation state or a non-operating state.

[0091] The wiper control circuit of the embodiment of the utility model has been verified in actual wiper motors and laboratories. Using the wiper control circuit to drive the target wiper can achieve more flexible control.

[0092] The wiper control circuit of the embodiment of the utility model adopts a gate driver and multiple driving transistors to control the wiper motor, which has high reliability, long service life, quiet and noiseless, is less affected by the vibration of the whole vehicle, and has high adaptability to complex environments. Secondly, because the relay will generate large switching losses when it is turned on and off in the application scenario of high-frequency switching, the gate driver and the driving transistor are relatively smoother and the switching losses are small. The gate driver and multiple driving transistors used in the embodiment of the utility model to control the target wiper are optimized in power consumption compared with the control method using two relay elements in the related art, which can reduce energy waste. The wiper control circuit of the embodiment of the utility model overcomes the shortcomings of the pull-in voltage and release voltage without relays, and has a wide operating voltage range. The wiper control circuit of the embodiment of the utility model occupies a small volume, is light in weight, and reduces carbon emissions. In the wiper control circuit of the embodiment of the utility model, the MCU can use PWM to control the gate driver so that the wiper motor drives the target wiper to rotate at a stable speed with a small jitter amplitude. At the same time, the mechanical impact and current spike impact when starting the wiper motor can be reduced. Finally, the wiper control circuit of the embodiment of the utility model can flexibly realize current monitoring and short circuit and open circuit fault detection.

[0093] In addition, the embodiment of the utility model further discloses a wiper control system, which has the above-mentioned wiper control circuit.

[0094] The wiper control system of the embodiment of the present application adopts the above-mentioned wiper control circuit. The wiper control circuit built into the wiper control system can quickly adjust the rotation state of the target wiper, which can improve the durability and reliability of the vehicle wiper control, thereby improving the working life and reliability of the vehicle function.

[0095] The embodiments of the utility model are described in detail above in conjunction with the accompanying drawings, but the utility model is not limited to the above embodiments. Various changes can be made within the knowledge of ordinary technicians in the relevant technical field without departing from the purpose of the utility model. In addition, the embodiments of the utility model and the features in the embodiments can be combined with each other without conflict.

Claims

1. A wiper control circuit, characterized in that: The wiper control circuit comprises: A driving switch module, the driving switch module comprising a plurality of driving transistors and a wiper motor, the wiper motor being used to drive a target wiper to perform a wiping operation; A drive control module is used to receive a wiper control signal, wherein the wiper control signal includes a moving speed of the target wiper; the drive switch module is electrically connected to the drive control module, and the drive control module is also used to determine a target transistor from the multiple drive transistors according to the wiper control signal, and control the target transistor to be in an on state, so as to control the wiper motor to drive the target wiper to perform a wiping operation at a moving speed corresponding to the wiper control signal.

2. The wiper control circuit according to claim 1, characterized in that: The driving switch module further comprises a switch power supply unit, and the switch power supply unit is used to provide electric energy to the driving switch module; The plurality of driving transistors include a first driving transistor, a gate of the first driving transistor is electrically connected to a first connecting pin of the driving control module, a source of the first driving transistor is electrically connected to a low-speed driving interface of the wiper motor, and a drain of the first driving transistor is electrically connected to the switch power supply unit; The drive control module is further configured to control the first drive transistor to be turned on when the wiper control signal indicates that the target wiper moves at a low speed, so as to control the wiper motor to drive the target wiper to perform a low-speed wiping operation.

3. The wiper control circuit according to claim 2, characterized in that: The plurality of driving transistors further include a second driving transistor, a gate of the second driving transistor being electrically connected to a second connecting pin of the driving control module, a source of the second driving transistor being electrically connected to a high-speed driving interface of the wiper motor, and a drain of the second driving transistor being electrically connected to the switch power supply unit; The drive control module is further configured to control the second drive transistor to be turned on when the wiper control signal indicates that the target wiper moves at a high speed, so as to control the wiper motor to drive the target wiper to perform a high-speed wiping operation.

4. The wiper control circuit according to claim 3, characterized in that: The plurality of driving transistors further include a third driving transistor and a fourth driving transistor, the gate of the third driving transistor is electrically connected to the third connecting pin of the driving control module, the source of the third driving transistor is grounded, and the drain of the third driving transistor is electrically connected to the high-speed driving interface of the wiper motor; The gate of the fourth driving transistor is electrically connected to the fourth connecting pin of the driving control module, the source of the fourth driving transistor is grounded, and the drain of the fourth driving transistor is electrically connected to the low-speed driving interface of the wiper motor; The drive control module is further configured to control the third drive transistor and the fourth drive transistor to be turned on when the wiper control signal indicates that the target wiper stops moving, so as to control the wiper motor to drive the target wiper to perform a stop wiping operation.

5. The wiper control circuit according to claim 4, characterized in that: The driving switch module further includes an anti-interference unit, which is electrically connected to the plurality of driving transistors and is used to filter out voltage ripples output by the plurality of driving transistors; The anti-interference unit includes a sixteenth capacitor and a seventeenth capacitor, one end of the sixteenth capacitor is electrically connected to the drain of the fourth driving transistor, and the other end of the sixteenth capacitor is electrically connected to the source of the fourth driving transistor; One end of the seventeenth capacitor is electrically connected to the drain of the third driving transistor, and the other end of the seventeenth capacitor is electrically connected to the source of the third driving transistor.

6. The wiper control circuit according to claim 3, characterized in that: The driving switch module also includes: A switch filter unit, the switch filter unit is electrically connected to the switch power supply unit, and the switch filter unit is used to filter out voltage ripple output by the switch power supply unit.

7. The wiper control circuit according to claim 6, characterized in that: The switch filter unit comprises: A twenty-second capacitor, one end of which is electrically connected to the switch power supply unit, and the other end of which is grounded; A twenty-third capacitor, one end of the twenty-third capacitor is connected to one end of the twenty-second capacitor, and the other end of the twenty-third capacitor is grounded.

8. The wiper control circuit according to claim 1, characterized in that: The drive control module comprises: A drive power supply unit, the drive power supply unit is used to provide power to the drive control module; A gate driver, the gate driver is electrically connected to the driving power supply unit, and the gate driver is used to receive a wiper control signal; A driving filter unit is electrically connected to the gate driver and is used to filter out voltage ripple output by the gate driver.

9. The wiper control circuit according to claim 8, characterized in that: The driving filter unit comprises: a thirteenth capacitor, one end of the thirteenth capacitor being electrically connected to the thirty-ninth pin of the gate driver, and the other end of the thirteenth capacitor being electrically connected to the fortieth pin of the gate driver; a fourteenth capacitor, one end of the fourteenth capacitor being electrically connected to the fortieth pin of the gate driver, and the other end of the fourteenth capacitor being grounded; A fifteenth capacitor, one end of the fifteenth capacitor is electrically connected to the thirty-ninth pin of the gate driver, and the other end of the fifteenth capacitor is grounded.

10. A wiper control system, characterized in that: The wiper control system comprises the wiper control circuit according to any one of claims 1 to 9.

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