Wiper control circuit and wiper system

Abstract

The utility model relates to the technical field of windscreen wiper control, and provides a windscreen wiper control circuit and a windscreen wiper system.The windscreen wiper control circuit comprises a windscreen wiper motor control circuit used for generating a first windscreen wiper signal or a second windscreen wiper signal, the first windscreen wiper signal is used for indicating that a windscreen wiper motor works at a first windscreen wiper speed, and the second windscreen wiper signal is used for indicating that a windscreen wiper motor works at a second windscreen wiper speed; the second windscreen wiper signal is used for indicating that the windscreen wiper motor works at a second windscreen wiper speed, and the first windscreen wiper speed is higher than the second windscreen wiper speed; and the oscillating circuit is connected with the windscreen wiper motor control circuit and used for generating an oscillating signal to adjust the generation frequency of the first windscreen wiper signal or the second windscreen wiper signal. Two different windscreen wiper signals are generated through one windscreen wiper motor control circuit and correspond to different windscreen wiper speeds respectively, it is avoided that a control circuit is independently designed for each windscreen wiper gear, and therefore the number of circuit elements and wiring is remarkably reduced, and the production and manufacturing cost is reduced.

Description

Technical Field

[0001] The present disclosure relates to the technical field of wiper control, and in particular to a wiper control circuit and a wiper system. Background Art

[0002] Wipers are one of the main functional components of vehicle exteriors. They are used to scrape off raindrops and dust attached to windshields and other glass windows of cars, ships, airplanes, etc., to improve the driver's visibility and increase driving safety.

[0003] In the related art, for wipers of different gears, a plurality of different wiper control circuits are respectively provided to control the wipers, which requires additional circuit elements and wiring, and increases the production cost of the wiper control circuit. Utility Model Content

[0004] The purpose of the present disclosure is to provide a wiper control circuit and a wiper system to solve the problems in the related art.

[0005] In order to achieve the above object, the present disclosure provides a wiper control circuit, the wiper control circuit comprising:

[0006] a wiper motor control circuit, configured to generate a first wiper signal or a second wiper signal, wherein the first wiper signal is configured to instruct the wiper motor to operate at a first wiper speed, and the second wiper signal is configured to instruct the wiper motor to operate at a second wiper speed, wherein the first wiper speed is greater than the second wiper speed;

[0007] An oscillation circuit is connected to the wiper motor control circuit and is used to generate an oscillation signal to adjust the generation frequency of the first wiper signal or the second wiper signal.

[0008] Optionally, the wiper motor control circuit includes:

[0009] A power switch having an input terminal, an output terminal and a control terminal, wherein the input terminal of the power switch is used to connect to a power supply, and the control terminal of the power switch is used to receive a power control signal;

[0010] a switching switch connected to the output end of the power switch, and configured to generate the first wiper signal or the second wiper signal according to a switching control signal;

[0011] The power switch is used to control whether the power supply is transmitted to the switching switch according to the power control signal.

[0012] Optionally, the power switch includes a first relay having an input pin, a ground pin, a common pin, a normally open pin, and a normally closed pin;

[0013] The input pin of the first relay serves as the control end of the power switch for receiving a power control signal, the normally open pin of the first relay serves as the input end of the power switch for connecting to a power supply, the common pin of the first relay serves as the output end of the power switch for connecting to a switching switch, and the ground pin of the first relay and the normally closed pin of the first relay are both connected to a reference ground.

[0014] Optionally, the switch includes a second relay, the second relay having an input pin, a ground pin, a common pin, a normally open pin, and a normally closed pin;

[0015] The input pin of the second relay is used to receive a switching control signal, the common pin of the second relay is connected to the common pin of the first relay, the normally open pin of the second relay is used to output the first wiper signal, the normally closed pin of the second relay is used to output the second wiper signal, and the ground pin of the second relay is connected to the reference ground.

[0016] Optionally, the wiper motor control circuit further includes a spray circuit, and the spray circuit includes a first resistor and a first diode;

[0017] The first end of the first resistor is connected to the anode of the first diode, the first end of the first resistor is used to receive a spray control signal, the second end of the first resistor is connected to the reference ground, and the cathode of the first diode is connected to the control end of the power switch.

[0018] Optionally, the wiper motor control circuit further includes a return circuit, and the return circuit includes a second diode and a third diode;

[0019] The anode of the second diode is used to receive a return control signal, the cathode of the first diode, the cathode of the second diode, and the cathode of the third diode are connected to a common node, and the common node is connected to the control end of the power switch, and the anode of the third diode is connected to the control end of the switching switch.

[0020] Optionally, the oscillation circuit includes a first transistor, a second transistor, a first capacitor, a second capacitor, a third capacitor, a second resistor, a third resistor, a fourth resistor, a fifth resistor, a sixth resistor, a seventh resistor, a fourth diode and an oscillator;

[0021] The oscillator has a negative terminal, an inverting input terminal, an output terminal, a reset terminal, a control terminal, a non-inverting input terminal, a power supply terminal and a positive terminal;

[0022] The negative terminal of the oscillator is connected to the reference ground, the inverting input terminal of the oscillator is connected to the non-inverting input terminal of the oscillator, the output terminal of the oscillator is connected to the control terminal of the first transistor through the second resistor, the second terminal of the first transistor is connected to the reference ground, the first terminal of the first transistor is connected to the control terminal of the second transistor through the third resistor, the first terminal of the second transistor is used to receive a gap control signal, the second terminal of the second transistor is connected to the wiper motor control circuit, the control terminal of the second transistor is connected to the first terminal of the second transistor through the fourth resistor, the first terminal of the fifth resistor is connected to the reset terminal of the oscillator, the second terminal of the fifth resistor is connected to the first terminal of the second transistor, and the first terminal of the first capacitor is connected to the reset terminal of the oscillator. The first end of the fifth resistor is connected, and the first end of the first capacitor is connected to the positive terminal of the oscillator. The second end of the first capacitor, the first end of the second capacitor, and the first end of the third capacitor are all connected to the reference ground. The second end of the third capacitor is connected to the control terminal of the oscillator. The second end of the second capacitor is connected to the first end of the sixth resistor, and the first end of the sixth resistor is connected to the non-inverting input terminal of the oscillator. The second end of the sixth resistor is connected to the power supply terminal of the oscillator. The cathode of the fourth diode is connected to the first end of the sixth resistor, the anode of the fourth diode is connected to the second end of the sixth resistor, the first end of the seventh resistor is connected to the second end of the sixth resistor, and the second end of the seventh resistor is connected to the positive terminal of the oscillator.

[0023] Optionally, the oscillation circuit further includes a fifth diode and a sixth diode;

[0024] The anode of the fifth diode is used to receive the gap control signal, and the cathode of the fifth diode is connected to the first end of the second transistor;

[0025] An anode of the sixth diode is connected to the second end of the second transistor, and a cathode of the sixth diode is connected to the wiper motor control circuit.

[0026] Optionally, the oscillation circuit further includes a seventh diode;

[0027] An anode of the seventh diode is connected to the first end of the fifth resistor, and a cathode of the seventh diode is connected to the reference ground.

[0028] The present disclosure further provides a wiper system, the wiper system comprising:

[0029] Wiper motor;

[0030] The wiper control circuit provided by any one of the above items.

[0031] According to the above technical solution, the wiper control circuit includes a wiper motor control circuit and an oscillator circuit. The wiper motor control circuit is configured to generate a first wiper signal or a second wiper signal, the first wiper signal being configured to instruct the wiper motor to operate at a first wiper speed, and the second wiper signal being configured to instruct the wiper motor to operate at a second wiper speed, the first wiper speed being greater than the second wiper speed. The oscillator circuit is connected to the wiper motor control circuit and is configured to generate an oscillation signal to adjust the frequency of the first wiper signal or the second wiper signal. By using only one wiper motor control circuit to generate two different wiper signals (the first wiper signal and the second wiper signal), each corresponding to a different wiper speed, the system eliminates the need for a separate control circuit for each wiper speed. This significantly reduces the number of circuit components and wiring, lowering manufacturing costs and space requirements, resulting in a more compact overall design. The oscillation signal is configured to adjust the frequency of the first wiper signal or the second wiper signal, thereby controlling the speed of the wiper motor. By adjusting the frequency of the oscillation signal, precise control of the wiper at different speeds can be achieved without adding additional circuits or components, thereby improving system flexibility while maintaining high control accuracy.

[0032] Other features and advantages of the present disclosure will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] The accompanying drawings are used to provide a further understanding of the present disclosure and constitute a part of the specification. Together with the following detailed description, they are used to explain the present disclosure but do not constitute a limitation of the present disclosure. In the accompanying drawings:

[0034] Figure 1 is a block diagram of a wiper control circuit according to an exemplary embodiment.

[0035] Figure 2 is a circuit diagram of a wiper motor control circuit according to an exemplary embodiment.

[0036] Figure 3 is a circuit diagram of an oscillation circuit according to an exemplary embodiment.

[0037] Description of Reference Numerals

[0038] 10-wiper motor control circuit, 20-oscillation circuit, J1-first relay, J2-second relay, R1-first resistor, R2-second resistor, R3-third resistor, R4-fourth resistor, R5-fifth resistor, R6-sixth resistor, R7-seventh resistor, R8-eighth resistor, D1-first diode, D2-second diode, D3-third diode, D4-fourth diode, D5-fifth diode, D6-sixth diode, D7-seventh diode, D8-eighth diode, D9-ninth diode, D10-tenth diode, D11-eleventh diode, C1-first capacitor, C2-second capacitor, C3-third capacitor, U1-oscillator, Q1-first transistor, Q2-second transistor, GND-negative terminal, TRIG-inverting input terminal, OUT-output terminal, RES-reset terminal, CONT-control terminal, TH-non-inverting input terminal, DIS-power supply terminal, VCC-positive terminal. DETAILED DESCRIPTION

[0039] The following describes the specific embodiments of the present disclosure in detail with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only used to illustrate and explain the present disclosure and are not intended to limit the present disclosure.

[0040] The terms "first", "second", etc. used in this disclosure are intended to distinguish one element from another and do not have order or importance. In addition, in the following description, when referring to the drawings, unless otherwise explained, the same reference numerals in different drawings represent the same or similar elements.

[0041] Wipers are one of the main functional components of vehicle exteriors. They are used to scrape off raindrops and dust attached to windshields and other glass windows of cars, ships, airplanes, etc., to improve the driver's visibility and increase driving safety.

[0042] In the related art, for wipers of different gears, a plurality of different wiper control circuits are respectively provided to control the wipers, which requires additional circuit elements and wiring, and increases the production cost of the wiper control circuit.

[0043] In order to solve the above problems, two different wiper signals (a first wiper signal and a second wiper signal) are generated by a wiper motor control circuit, corresponding to different wiper speeds respectively, avoiding the need to design a separate control circuit for each wiper gear, thereby significantly reducing the number of circuit components and wiring, not only reducing production costs, but also reducing space occupancy, making the overall design more compact; the oscillation signal can adjust the generation frequency of the first wiper signal or the second wiper signal, and then control the speed of the wiper motor. By adjusting the frequency of the oscillation signal, precise control of the wiper at different speed gears can be achieved without adding additional circuits or components, which not only improves the flexibility of the system but also maintains a high level of control accuracy.

[0044] Figure 1 is a block diagram of a wiper control circuit according to an exemplary embodiment. Figure 1 The wiper control circuit includes a wiper motor control circuit 10 and an oscillation circuit 20 . The wiper motor control circuit 10 is connected to the oscillation circuit 20 , and the wiper motor control circuit 10 is connected to the wiper motor.

[0045] The wiper motor control circuit 10 is used to generate a first wiper signal or a second wiper signal. The first wiper signal is used to instruct the wiper motor to operate at a first wiper speed. The second wiper signal is used to instruct the wiper motor to operate at a second wiper speed. The first wiper speed is greater than the second wiper speed.

[0046] The first wiper signal can be a high-speed wiper signal, and the second wiper signal can be a low-speed wiper signal. The wiper motor control circuit 10 is connected to the wiper motor to send the first wiper signal or the second wiper signal to the wiper motor to achieve high-speed wiper or low-speed wiper.

[0047] The oscillation circuit 20 is connected to the wiper motor control circuit 10 and is used to generate an oscillation signal to adjust the generation frequency of the first wiper signal or the second wiper signal.

[0048] Two different wiper signals (a first wiper signal and a second wiper signal) are generated by a wiper motor control circuit 10, corresponding to different wiper speeds respectively, avoiding the need to design a separate control circuit for each wiper gear, thereby significantly reducing the number of circuit components and wiring, not only reducing production costs, but also reducing space occupancy, making the overall design more compact; the oscillation signal can adjust the generation frequency of the first wiper signal or the second wiper signal, and then control the speed of the wiper motor. By adjusting the frequency of the oscillation signal, precise control of the wiper at different speed gears can be achieved without adding additional circuits or components, which not only improves the flexibility of the system but also maintains a high level of control accuracy.

[0049] In a possible implementation, the wiper motor control circuit 10 may include:

[0050] A power switch having an input terminal, an output terminal and a control terminal, wherein the input terminal of the power switch is used to connect to a power supply, and the control terminal of the power switch is used to receive a power control signal;

[0051] a switching switch connected to the output end of the power switch, and configured to generate a first wiper signal or a second wiper signal according to a switching control signal;

[0052] The power switch is used to control whether the power supply is transmitted to the switch according to the power control signal.

[0053] The power control signal indicates the state of the power switch. When the power control signal is in a specific state (such as high or low), the power switch will close or open accordingly, changing the on / off state of the circuit. The power control signal can be used to control whether the power supply (for example, 24V) is transmitted to the switch.

[0054] For example, when the power control signal is at a high level, the power switch is turned on, and the power supply is transmitted to the switching switch via the power switch.

[0055] It should be understood that the first wiper signal or the second wiper signal can only be generated when the power supply is transmitted to the switching switch. When the power supply is not transmitted to the switching switch, neither the first wiper signal nor the second wiper signal can be generated.

[0056] In one possible implementation, see Figure 2 and Figure 3 The power switch includes a first relay J1 having an input pin, a ground pin, a common pin, a normally open pin, and a normally closed pin.

[0057] The input pin of the first relay J1 serves as the control end of the power switch for receiving a power control signal. The normally open pin of the first relay J1 serves as the input end of the power switch for connecting to a power supply (24V). The common pin of the first relay J1 serves as the output end of the power switch for connecting to a switching switch. The ground pin of the first relay J1 and the normally closed pin of the first relay J1 are both connected to a reference ground.

[0058] Figure 2 and Figure 3 H1 to H10 can be regarded as connection ports of the wiper motor control circuit 10 and the oscillation circuit 20, through which signals are connected or received. The connection port H1 is connected to the input pin of the first relay J1, and the power control signal can be received through the connection port H1.

[0059] The working principle of the first relay J1 is as follows:

[0060] When the input pin of the first relay J1 receives a high-level signal, current flows through the coil located between the input pin and the ground pin of the first relay J1, generating a magnetic field. This magnetic field attracts the armature inside the first relay J1, switching it from connecting the normally closed pin to the common pin to connecting the normally open pin to the common pin. This allows the power supply (24V) of the normally open pin of the first relay J1 to be transmitted to the switch.

[0061] In another embodiment, the normally closed pin of the first relay J1 can be connected to the reference ground via an eighth resistor R8, and the ground pin of the first relay J1 can be connected to the reference ground via an eighth diode D8. The eighth diode D8 can be IN4007.

[0062] By providing the eighth diode D8, the stability and reliability of the circuit can be improved, electronic devices can be protected, the current in the inductor can be released, and reverse voltage shock can be prevented.

[0063] In one possible implementation, please refer to Figure 2 The switch may include a second relay J2 having an input pin, a ground pin, a common pin, a normally open pin, and a normally closed pin.

[0064] The input pin of the second relay J2 is used to receive a switching control signal, the common pin of the second relay J2 is connected to the common pin of the first relay J1, the normally open pin of the second relay J2 is used to output a first wiper signal, the normally closed pin of the second relay J2 is used to output a second wiper signal, and the ground pin of the second relay J2 is connected to a reference ground.

[0065] Connection port H2 is connected to the input pin of the second relay J2 and can receive a switching control signal through connection port H2. Connection port H3 is connected to the normally open pin of the second relay J2 and can output a first wiper signal through connection port H3. Connection port H4 is connected to the normally closed pin of the second relay J2 and can output a second wiper signal through connection port H4.

[0066] The working principle of the second relay J2 is as follows:

[0067] When the input pin of the second relay J2 receives a high-level signal, current flows through the coil located between the input pin and the ground pin of the second relay J2, generating a magnetic field. This magnetic field attracts the armature inside the second relay J2, switching the armature from connecting the normally closed pin to the common pin to connecting the normally open pin to the common pin. When the normally open pin of the second relay J2 is connected to the common pin, the 24V voltage transmitted by the power supply is output through the normally open pin of the second relay J2 as the first wiper signal. When the normally closed pin of the second relay J2 is connected to the common pin, the 24V voltage transmitted by the power supply is output through the normally closed pin of the second relay J2 as the second wiper signal.

[0068] In another embodiment, the normally open pin of the second relay J2 can be connected to the reference ground via a tenth diode D10, and the normally closed pin of the second relay J2 can be connected to the reference ground via an eleventh diode D11. The tenth diode D10 and the eleventh diode D11 can be P6KE180A. The ground pin of the second relay J2 can be connected to the reference ground via an eighth diode D8. The eighth diode D8 can be IN4007.

[0069] By providing the eighth diode D8 , the tenth diode D10 and the eleventh diode D11 , the stability and reliability of the circuit can be improved, electronic components can be protected, the current in the inductor can be released, and reverse voltage shock can be prevented.

[0070] In a possible implementation, the wiper motor control circuit 10 may further include a spray circuit, which includes a first resistor R1 and a first diode D1.

[0071] The first end of the first resistor R1 is connected to the anode of the first diode D1, the first end of the first resistor R1 is used to receive the spray control signal, the second end of the first resistor R1 is connected to the reference ground, and the cathode of the first diode D1 is connected to the control end of the power switch.

[0072] The first diode D1 may be of type IN5408.

[0073] The connection port H5 is connected to the power ground. The connection port H6 is connected to the first end of the first resistor R1 and can receive the spray control signal through the connection port H6. The connection port H7 is connected to the first end of the first resistor R1 and can provide the spray pot power signal through the connection port H7.

[0074] The shower pot power signal and the shower control signal can be connected to the control terminal CONT of the power switch, ie the input pin of the first relay J1, through the first diode D1, so as to realize the simultaneous showering and wiping.

[0075] In another embodiment, the second end of the first resistor R1 may be connected to the reference ground via a ninth diode D9 , and the model of the ninth diode D9 may be P6KE180A.

[0076] In a possible implementation, the wiper motor control circuit 10 further includes a return circuit, and the return circuit includes a second diode D2 and a third diode D3.

[0077] The anode of the second diode D2 is used to receive the return control signal. The cathodes of the first diode D1, the second diode D2, and the third diode D3 are connected to a common node, and the common node is connected to the control end of the power switch. The anode of the third diode D3 is connected to the control end of the switching switch.

[0078] The second diode D2 and the third diode D3 may be of type IN5408.

[0079] The connection port H8 is connected to the anode of the second diode D2 and can receive a return control signal through the connection port H8.

[0080] When the return control signal is a low level signal, return can be achieved.

[0081] In one possible implementation, please refer to Figure 3 The oscillation circuit 20 may include a first transistor Q1, a second transistor Q2, a first capacitor C1, a second capacitor C2, a third capacitor C3, a second resistor R2, a third resistor R3, a fourth resistor R4, a fifth resistor R5, a sixth resistor R6, a seventh resistor R7, a fourth diode D4 and an oscillator U1.

[0082] The oscillator U1 has a negative terminal GND, an inverting input terminal TRIG, an output terminal OUT, a reset terminal RES, a control terminal CONT, a non-inverting input terminal TH, a power supply terminal DIS and a positive terminal VCC.

[0083] The negative terminal GND of the oscillator U1 is connected to the reference ground, the inverting input terminal TRIG of the oscillator U1 is connected to the non-inverting input terminal TH of the oscillator U1, the output terminal OUT of the oscillator U1 is connected to the control terminal CONT of the first transistor Q1 through the second resistor R2, the second terminal of the first transistor Q1 is connected to the reference ground, the first terminal of the first transistor Q1 is connected to the control terminal CONT of the second transistor Q2 through the third resistor R3, the first terminal of the second transistor Q2 is used to receive the gap control signal, the second terminal of the second transistor Q2 is connected to the wiper motor control circuit 10, the control terminal CONT of the second transistor Q2 is connected to the first terminal of the second transistor Q2 through the fourth resistor R4, the first terminal of the fifth resistor R5 is connected to the reset terminal RES of the oscillator U1, the second terminal of the fifth resistor R5 is connected to the first terminal of the second transistor Q2, and the first terminal A first end of the capacitor C1 is connected to a first end of the fifth resistor R5, and a first end of the first capacitor C1 is connected to a positive terminal of the oscillator U1. A second end of the first capacitor C1, a first end of the second capacitor C2, and a first end of the third capacitor C3 are all connected to a reference ground. A second end of the third capacitor C3 is connected to a control terminal CONT of the oscillator U1. A second end of the second capacitor C2 is connected to a first end of a sixth resistor R6, and a first end of the sixth resistor R6 is connected to a non-inverting input terminal TH of the oscillator U1. A second end of the sixth resistor R6 is connected to a power supply terminal DIS of the oscillator U1. A cathode of the fourth diode D4 is connected to a first end of the sixth resistor R6, an anode of the fourth diode D4 is connected to a second end of the sixth resistor R6, a first end of the seventh resistor R7 is connected to a second end of the sixth resistor R6, and a second end of the seventh resistor R7 is connected to a positive terminal VCC of the oscillator U1.

[0084] The first transistor Q1 and the second transistor Q2 may be of type H649A. The fourth diode D4 may be of type IN4007. The oscillator U1 may be of type NE555.

[0085] Connection port H9 is connected to the first end of the second transistor Q2 and can receive the gap control signal via connection port H9. Connection port H10 is connected to the second end of the second transistor Q2 and can output an oscillation signal to the wiper motor control circuit 10 via connection port H10. Connecting connection port H10 to connection port H1 adjusts the frequency of the first wiper signal, while connecting port H10 to connection port H2 adjusts the frequency of the second wiper signal.

[0086] The oscillation frequency of the oscillation signal is determined by the charge and discharge time constants of oscillation circuit 20. The charging time T1 = 0.693 * R2 * C3, and the discharge time T2 = 0.693 * R6 * C3. If the charging time is approximately 5 seconds, the discharge time can be adjusted within a range of 0 to 30 seconds by adjusting the resistance of the sixth resistor R6. The period of the multivibrator, T = T1 + T2 = 0.693 * (R2 + R3) * C3. Therefore, both the period length and the duty cycle can be adjusted.

[0087] When power is first applied, the inverting input terminal TRIG is low, setting the oscillator U1. The output terminal OUT of the oscillator U1 is high and is output to the wiper motor control circuit 10, controlling the first relay J1 to close, energizing the wiper motor and causing the wipers to oscillate. As the third capacitor C3 charges through the first and second capacitors C1 and C2, when the potential on the third capacitor C3 exceeds the trigger level of 2 / 3VDD at the non-inverting input terminal TH, the circuit resets. The output terminal OUT of the oscillator U1 is low and is output to the wiper motor control circuit 10, controlling the first relay J1 to open, causing the wiper motor to stop rotating and the wipers to stop oscillating. The time it takes for the third capacitor C3 to charge to 2 / 3VDD is the operating time. The time it takes for the third capacitor C3 to discharge through the fourth diode D4 and the sixth resistor R6 to the internal discharge tube of the oscillator U1 and for the time it remains below 1 / 3VDD is the off time. This cycle repeats itself, allowing the circuit to operate autonomously.

[0088] In a possible implementation, the oscillation circuit 20 further includes a fifth diode D5 and a sixth diode D6.

[0089] The anode of the fifth diode D5 is used to receive the gap control signal, and the cathode of the fifth diode D5 is connected to the first end of the second transistor;

[0090] An anode of the sixth diode D6 is connected to the second end of the second transistor, and a cathode of the sixth diode D6 is connected to the wiper motor control circuit 10 .

[0091] The fifth diode D5 and the sixth diode D6 may be of type IN4007.

[0092] In a possible implementation, the oscillation circuit 20 may further include a seventh diode D7;

[0093] An anode of the seventh diode D7 is connected to the first end of the fifth resistor R5 , and a cathode of the seventh diode D7 is connected to the reference ground.

[0094] The model of the seventh diode D7 may be P6KE180A.

[0095] An embodiment of the present disclosure further provides a wiper system, which includes a wiper motor and the above-mentioned wiper control circuit.

[0096] The preferred embodiments of the present disclosure are described in detail above in conjunction with the accompanying drawings. However, the present disclosure is not limited to the specific details of the above embodiments. Within the technical concept of the present disclosure, various simple modifications can be made to the technical solutions of the present disclosure, and these simple modifications all fall within the scope of protection of the present disclosure.

[0097] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. To avoid unnecessary repetition, the present disclosure will not further describe various possible combinations.

[0098] In addition, the various embodiments of the present disclosure may be arbitrarily combined, and as long as they do not violate the concept of the present disclosure, they should also be regarded as the contents disclosed by the present disclosure.

Claims

1. A wiper control circuit, characterized in that: The wiper control circuit comprises: a wiper motor control circuit, configured to generate a first wiper signal or a second wiper signal, wherein the first wiper signal is configured to instruct the wiper motor to operate at a first wiper speed, and the second wiper signal is configured to instruct the wiper motor to operate at a second wiper speed, wherein the first wiper speed is greater than the second wiper speed; An oscillation circuit is connected to the wiper motor control circuit and is used to generate an oscillation signal to adjust the generation frequency of the first wiper signal or the second wiper signal.

2. The wiper control circuit according to claim 1, characterized in that: The wiper motor control circuit includes: A power switch having an input terminal, an output terminal and a control terminal, wherein the input terminal of the power switch is used to connect to a power supply, and the control terminal of the power switch is used to receive a power control signal; a switching switch connected to the output end of the power switch, and configured to generate the first wiper signal or the second wiper signal according to a switching control signal; The power switch is used to control whether the power supply is transmitted to the switching switch according to the power control signal.

3. The wiper control circuit according to claim 2, characterized in that: The power switch includes a first relay having an input pin, a ground pin, a common pin, a normally open pin, and a normally closed pin; The input pin of the first relay serves as the control end of the power switch for receiving a power control signal, the normally open pin of the first relay serves as the input end of the power switch for connecting to a power supply, the common pin of the first relay serves as the output end of the power switch for connecting to a switching switch, and the ground pin of the first relay and the normally closed pin of the first relay are both connected to a reference ground.

4. The wiper control circuit according to claim 3, characterized in that: The switch includes a second relay having an input pin, a ground pin, a common pin, a normally open pin, and a normally closed pin; The input pin of the second relay is used to receive a switching control signal, the common pin of the second relay is connected to the common pin of the first relay, the normally open pin of the second relay is used to output the first wiper signal, the normally closed pin of the second relay is used to output the second wiper signal, and the ground pin of the second relay is connected to the reference ground.

5. The wiper control circuit according to claim 2, characterized in that: The wiper motor control circuit further includes a spray circuit, and the spray circuit includes a first resistor and a first diode; The first end of the first resistor is connected to the anode of the first diode, the first end of the first resistor is used to receive a spray control signal, the second end of the first resistor is connected to the reference ground, and the cathode of the first diode is connected to the control end of the power switch.

6. The wiper control circuit according to claim 5, characterized in that: The wiper motor control circuit further includes a return circuit, and the return circuit includes a second diode and a third diode; The anode of the second diode is used to receive a return control signal, the cathode of the first diode, the cathode of the second diode, and the cathode of the third diode are connected to a common node, and the common node is connected to the control end of the power switch, and the anode of the third diode is connected to the control end of the switching switch.

7. The wiper control circuit according to claim 1, characterized in that: The oscillation circuit includes a first triode, a second triode, a first capacitor, a second capacitor, a third capacitor, a second resistor, a third resistor, a fourth resistor, a fifth resistor, a sixth resistor, a seventh resistor, a fourth diode and an oscillator; The oscillator has a negative terminal, an inverting input terminal, an output terminal, a reset terminal, a control terminal, a non-inverting input terminal, a power supply terminal and a positive terminal; The negative terminal of the oscillator is connected to the reference ground, the inverting input terminal of the oscillator is connected to the non-inverting input terminal of the oscillator, the output terminal of the oscillator is connected to the control terminal of the first transistor through the second resistor, the second terminal of the first transistor is connected to the reference ground, the first terminal of the first transistor is connected to the control terminal of the second transistor through the third resistor, the first terminal of the second transistor is used to receive a gap control signal, the second terminal of the second transistor is connected to the wiper motor control circuit, the control terminal of the second transistor is connected to the first terminal of the second transistor through the fourth resistor, the first terminal of the fifth resistor is connected to the reset terminal of the oscillator, the second terminal of the fifth resistor is connected to the first terminal of the second transistor, and the first terminal of the first capacitor is connected to the reset terminal of the oscillator. The first end of the fifth resistor is connected, and the first end of the first capacitor is connected to the positive terminal of the oscillator. The second end of the first capacitor, the first end of the second capacitor, and the first end of the third capacitor are all connected to the reference ground. The second end of the third capacitor is connected to the control terminal of the oscillator. The second end of the second capacitor is connected to the first end of the sixth resistor, and the first end of the sixth resistor is connected to the non-inverting input terminal of the oscillator. The second end of the sixth resistor is connected to the power supply terminal of the oscillator. The cathode of the fourth diode is connected to the first end of the sixth resistor, the anode of the fourth diode is connected to the second end of the sixth resistor, the first end of the seventh resistor is connected to the second end of the sixth resistor, and the second end of the seventh resistor is connected to the positive terminal of the oscillator.

8. The wiper control circuit according to claim 7, characterized in that: The oscillation circuit further includes a fifth diode and a sixth diode; The anode of the fifth diode is used to receive the gap control signal, and the cathode of the fifth diode is connected to the first end of the second transistor; An anode of the sixth diode is connected to the second end of the second transistor, and a cathode of the sixth diode is connected to the wiper motor control circuit.

9. The wiper control circuit according to claim 7, characterized in that: The oscillation circuit further includes a seventh diode; An anode of the seventh diode is connected to the first end of the fifth resistor, and a cathode of the seventh diode is connected to the reference ground.

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

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