Control circuit of multi-way valve cleaning device and control method thereof

Abstract

The invention discloses a control circuit of a multi-way valve cleaning device and a control method thereof, the control circuit acts on electric equipment, and the control circuit comprises a control module, a CAN / LIN communication module, a power supply module, an electromagnetic valve control circuit, a first driving circuit and a second driving circuit; the CAN / LIN communication module is used for completing data exchange with the electric equipment, the CAN / LIN communication module is connected with the control module, and the CAN / LIN communication module transmits the received data to the control module; the control module is connected with the power supply module, and the power supply module supplies power to the control module; the control module is connected with the electromagnetic valve control circuit, the first driving circuit and the second driving circuit, and the control module controls the working states of the electromagnetic valve control circuit, the first driving circuit and the second driving circuit on the basis of receiving data transmitted by the CAN / LIN communication module. And the control module receives data transmitted by the CAN / LIN communication module to complete cleaning work, so that the driving safety is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of automobile electronic safety, and in particular to a control circuit and a control method of a multi-way valve cleaning device. Background Art

[0002] With the rapid development of the automotive industry, automotive radar / camera systems have become a popular standard because they can effectively avoid collision accidents during driving. However, as electronic equipment, they also have their own defects. In daily vehicle use, some pollution will inevitably be deposited on the outside of the vehicle body, resulting in a decline in its performance.

[0003] The car radar cleaning device is an intelligent device that can effectively solve this problem. It can clean the pollution on the car radar and camera in a timely and rapid manner, so that it is always in good working condition, thus effectively ensuring the safety and stability of the car's driving. Summary of the invention

[0004] To solve the above problems, the present invention discloses a control circuit of a multi-way valve cleaning device, which acts on electrical equipment, and includes: a control module, a CAN / LIN communication module, a power module, a solenoid valve control circuit, a first drive circuit and a second drive circuit; The CAN / LIN communication module is used to complete data exchange with the electric device, the CAN / LIN communication module is connected to the control module, and the CAN / LIN communication module transmits the received data to the control module; The control module is connected to the power module, and the power module supplies power to the control module; The control module is connected to the solenoid valve control circuit, the first drive circuit and the second drive circuit, and the control module controls the working states of the solenoid valve control circuit, the first drive circuit and the second drive circuit based on the data transmitted by the CAN / LIN communication module.

[0005] In one embodiment, the solenoid valve control circuit includes a first diode, a second diode, a first resistor, a second resistor, a solenoid valve and a first switch tube; one end of the first resistor is connected to the output end of the control module, and the other end of the first resistor is connected to the first end of the first switch tube; the positive electrode of the first diode is connected to one end of the second resistor, the negative electrode of the first diode is connected to one end of the first resistor close to the control module, and the other end of the second resistor is connected to one end of the first resistor close to the first switch tube; the second end of the first switch tube is connected to one end of the solenoid valve, and the other end of the solenoid valve is connected to a first power supply; the positive electrode of the second diode is connected to one end of the solenoid valve close to the first switch tube, and the negative electrode of the second diode is connected to one end of the solenoid valve close to the first power supply; the third end of the first switch tube is grounded.

[0006] In one embodiment, the first driving circuit is used to drive a water pump, and the second driving circuit is used to drive an air pump.

[0007] In one embodiment, the first driving circuit includes a totem pole circuit, a third resistor, a second switch tube, a water pump and a third diode; the first end of the totem pole circuit is connected to the output end of the control module, the second end of the totem pole circuit is grounded, the third end of the totem pole circuit is connected to one end of the third resistor, and the fourth end of the totem pole circuit is connected to the second power supply; the other end of the third resistor is connected to the first end of the second switch tube; the second and third ends of the second switch tube are connected to one end of the water pump, and the other end of the water pump is connected to the second power supply; the positive electrode of the third diode is connected to one end of the water pump close to the second switch tube, and the negative electrode of the third diode is connected to one end of the water pump close to the second power supply; the fourth end of the second switch tube is grounded.

[0008] In one embodiment, the second end of the second switch tube corresponds to one water pump, and the third end of the second switch tube corresponds to two water pumps.

[0009] In one embodiment, the power supply module includes a sampling circuit, which can monitor the voltage and current changes of the control circuit in real time. The sampling circuit is connected to the control module, and the control module adjusts the output state based on the sampling data of the sampling circuit.

[0010] In one embodiment, the power module further includes an anti-reverse connection circuit, and the anti-reverse connection circuit is used to protect the control circuit from working normally.

[0011] In one embodiment, the power module further includes a step-down circuit and a filter circuit, wherein the step-down circuit is used to reduce the battery voltage to a voltage that can be normally used by the control module, and the filter circuit is used to remove noise from the battery voltage.

[0012] The present invention also provides a method for controlling a control circuit of a multi-way valve cleaning device as described in any one of the above items, comprising the following steps: The control module determines the position that needs to be cleaned; Open the solenoid valve to open the passage to the location that needs to be cleaned; Based on the location to be cleaned, the control module determines the length of the water path and selects one or two water pumps to work; After cleaning is completed, turn on the air pump to dry the water stains to complete the cleaning task.

[0013] In one embodiment, the control module determines the position to be cleaned includes the following steps: Beneficial effects of the present invention: Different from the prior art, the present invention discloses a control circuit and a control method of a multi-way valve cleaning device, which acts on electrical equipment. The control circuit includes: a control module, a CAN / LIN communication module, a power module, a solenoid valve control circuit, a first drive circuit, and a second drive circuit; the CAN / LIN communication module is used to complete data exchange with the electrical equipment, the CAN / LIN communication module is connected to the control module, and the CAN / LIN communication module transmits the received data to the control module; the control module is connected to the power module, and the power module supplies power to the control module; the control module is connected to the solenoid valve control circuit, the first drive circuit, and the second drive circuit, and the control module controls the working state of the solenoid valve control circuit, the first drive circuit, and the second drive circuit based on the data transmitted by the CAN / LIN communication module. The cleaning work is completed by receiving the data transmitted by the CAN / LIN communication module through the control module, which improves driving safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural schematic diagram of an embodiment of a control circuit of a multi-way valve cleaning device of the present invention; Figure 2 for Figure 1 A schematic diagram of the structure of an embodiment of a solenoid valve control circuit; Figure 3 for Figure 1 A schematic structural diagram of an embodiment of a first driving circuit; Figure 4 A schematic diagram of a flow chart of an embodiment of a control method of the present invention; Figure 5 for Figure 4 Schematic diagram of the process of step S11 in FIG. DETAILED DESCRIPTION

[0015] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0016] The present invention provides a control circuit of a multi-way valve cleaning device, which acts on an electrical device, and the electrical device may be a radar or a camera of an automobile. The control circuit of the multi-way valve cleaning device is used to control the operation of the cleaning device, complete the cleaning of the automobile radar or the camera, and improve driving safety.

[0017] like Figure 1 As shown, Figure 1 This is a structural schematic diagram of an embodiment of a control circuit of a multi-way valve cleaning device of the present invention; the control circuit includes: a control module 1, a power module 2, a CAN / LIN communication module 3, a solenoid valve control circuit 4, a first drive circuit 5 and a second drive circuit 6.

[0018] The CAN / LIN communication module 3 is used to complete data exchange with electrical equipment. The CAN / LIN communication module 3 is connected to the control module 1, and the CAN / LIN communication module 3 transmits the received data to the control module 1; the CAN / LIN communication module 3 supports high-speed data transmission and can quickly send data to the control module 1. The cleaning device needs to respond quickly according to the sensor data; the CAN / LIN communication module 3 can be used to remotely control the cleaning device, and the operation can be completed without physical contact, which improves convenience and practicality.

[0019] The control module 1 is connected to the power module 2, and the power module 2 supplies power to the control module 1; the power module 2 provides stable voltage and current, ensuring that the control module 1 obtains the same power supply under various working conditions, thereby improving the stability and reliability of the control circuit.

[0020] The control module 1 is connected to the solenoid valve control circuit 4, the first drive circuit 5 and the second drive circuit 6. The control module 1 controls the working states of the solenoid valve control circuit 4, the first drive circuit 5 and the second drive circuit 6 based on the data transmitted by the CAN / LIN communication module 3. The control module 1 can centrally manage the solenoid valve control circuit 4, the first drive circuit 5 and the second drive circuit 6, which simplifies the circuit architecture and improves flexibility. The control module 1 can use the received data to perform fault diagnosis and report the fault information to the central control system of the vehicle through the CAN / LIN communication module 3 to improve safety. By precisely controlling components such as solenoid valves and pumps, the system can ensure cleaning when necessary and reduce unnecessary energy consumption.

[0021] In this embodiment, the control module 1 uses MCU. In other embodiments, the control module can use a central processing unit such as FPGA, DSP, single-chip microcomputer, etc., which is not limited here.

[0022] In summary, the present invention discloses a control circuit and a control method of a multi-way valve cleaning device, which acts on an electrical device, and the control circuit includes: a control module, a CAN / LIN communication module, a power module, a solenoid valve control circuit, a first drive circuit, and a second drive circuit; the CAN / LIN communication module is used to complete data exchange with the electrical device, the CAN / LIN communication module is connected to the control module, and the CAN / LIN communication module transmits the received data to the control module; the control module is connected to the power module, and the power module supplies power to the control module; the control module is connected to the solenoid valve control circuit, the first drive circuit, and the second drive circuit, and the control module controls the working state of the solenoid valve control circuit, the first drive circuit, and the second drive circuit based on the data transmitted by the CAN / LIN communication module. The cleaning work is completed by receiving the data transmitted by the CAN / LIN communication module through the control module, thereby improving driving safety.

[0023] In one embodiment, the solenoid valve control circuit 4 includes a first diode D1, a second diode D2, a first resistor R1, a second resistor R2, a solenoid valve and a first switch tube Q1; Figure 2 As shown, Figure 2 for Figure 1 A structural schematic diagram of an embodiment of a solenoid valve control circuit.

[0024] One end of the first resistor R1 is connected to the output end of the control module 1, and the other end of the first resistor R1 is connected to the first end of the first switch tube Q1; the anode of the first diode D1 is connected to one end of the second resistor R2, the cathode of the first diode D1 is connected to one end of the first resistor R1 close to the control module 1, and the other end of the second resistor R2 is connected to one end of the first resistor R1 close to the first switch tube Q1; the second end of the first switch tube Q1 is connected to one end of the solenoid valve, and the other end of the solenoid valve is connected to the first power supply V1; the anode of the second diode D2 is connected to one end of the solenoid valve close to the first switch tube Q1, and the cathode of the second diode D2 is connected to one end of the solenoid valve close to the first power supply V1; the third end of the first switch tube Q1 is grounded.

[0025] In this embodiment, the first diode D1 is used as a fast recovery diode to accelerate the turn-off time of the MOS tube and reduce the loss during turn-off; the second diode D2 is used as a freewheeling diode to release the current of the induced electromotive force and protect the circuit from the influence of the reverse voltage spike; the first resistor R1 is used as a current limiting resistor to limit the current flowing into the first switch tube Q1 to prevent the power supply IC from being damaged due to excessive current; the second resistor R2 prevents excessive current when the first switch tube Q1 is turned off; the first switch tube Q1 is an N-type MOS tube, the first end is the gate, the second end is the drain, and the third end is the source; in other embodiments, the first switch tube can also be a triode, which is not limited here.

[0026] The working principle of the solenoid valve control circuit in this embodiment is described in detail below: The control module 1 receives data from the CAN / LIN communication module 3 and then controls the operation of the solenoid valve. The control module 1 outputs a high-level signal to increase the voltage at the first end of the first switch tube Q1, that is, to increase the gate voltage of the first switch tube Q1; the third end of the first switch tube Q1 is grounded, that is, the source of the first switch tube Q1 is grounded. The first switch tube Q1 is an N-type MOS tube, and the gate voltage is greater than the source voltage. The first switch tube Q1 is turned on, and the solenoid valve is powered by the first power supply V1 to open. The solenoid valve is a valve used to control the flow of liquid or gas.

[0027] It is common knowledge for those skilled in the art to connect a diode between the drain and source of an N-type MOS tube to prevent the MOS tube from being broken down, which will not be described in detail here.

[0028] In one embodiment, the first drive circuit 5 is used to drive the water pump, and the second drive circuit 6 is used to drive the air pump. The first drive circuit 5 and the second drive circuit 6 control the water pump and the air pump respectively, realizing independent control, so that the control circuit can start or stop the water pump or the air pump separately as needed; by precisely controlling the start and stop of each pump, unnecessary energy consumption can be reduced and the energy efficiency of the system can be improved; for example, when only water is needed for cleaning, only the water pump can be started without starting the air pump.

[0029] In one embodiment, the first driving circuit 5 includes a totem pole circuit 51, a third resistor R3, a second switch tube Q2, a water pump and a third diode D3; Figure 3 As shown, Figure 3 for Figure 1 A structural schematic diagram of an embodiment of a first driving circuit in FIG.

[0030] The first end 511 of the totem pole circuit is connected to the output end of the control module 1, the second end 512 of the totem pole circuit is grounded, the third end 513 of the totem pole circuit is connected to one end of the third resistor R3, and the fourth end 514 of the totem pole circuit is connected to the second power supply V2; the other end of the third resistor R3 is connected to the first end of the second switch tube Q2; the second end and the third end of the second switch tube Q2 are connected to one end of the water pump, and the other end of the water pump is connected to the second power supply V2; the positive electrode of the third diode D3 is connected to one end of the water pump close to the second switch tube Q2, and the negative electrode of the third diode D3 is connected to one end of the water pump close to the second power supply V2; the fourth end of the second switch tube Q2 is grounded.

[0031] In this embodiment, the totem pole circuit 51 is used to improve the current driving capability of the MCU so that the MCU can effectively drive the second switch tube Q2; it is common knowledge for those skilled in the art to form a totem pole circuit using two transistors and two resistors, and will not be described in detail here. In other embodiments, other types of totem pole circuits may also be used. The second switch tube Q2 is the same as the first switch tube Q1, and both are N-type MOS tubes. The second end and the third end of the second switch tube Q2 are both drain electrodes of the second switch tube Q2. The third diode D3 is used as a freewheeling diode and will not be described in detail here.

[0032] In one embodiment, the second end of the second switch tube Q2 corresponds to one water pump, and the third end of the second switch tube Q2 corresponds to two water pumps; by controlling different water pumps through different ports of the second switch tube, independent control of each water pump can be achieved; this enables the system to start or stop a specific water pump according to actual needs, thereby improving flexibility.

[0033] The drain of the switch tube of the second driving circuit 6 has only one pin, which controls the start-up of the air pump; the second driving circuit 6 also includes a totem pole circuit to improve the ability of the MCU to drive the switch tube.

[0034] In one embodiment, the power module 2 includes a sampling circuit (not shown), which can monitor the voltage and current changes of the control circuit in real time. The sampling circuit is connected to the control module 1, and the control module 1 adjusts the output state based on the sampling data of the sampling circuit; the sampling circuit can monitor the changes of voltage and current in real time to ensure that the control module 1 can understand the working state of the circuit in time; by monitoring the voltage and current, protective measures can be taken immediately in abnormal situations to prevent the circuit from being damaged. For example, when the current exceeds the preset threshold, the control module 1 can temporarily shut down the output to avoid overload.

[0035] In one embodiment, the power module 2 further includes an anti-reverse connection circuit (not shown), which is used to protect the normal operation of the control circuit; when the polarity of the power supply is reversed, the components in the circuit may be subjected to excessive voltage or current shock, resulting in damage. The anti-reverse connection circuit can avoid this situation; by ensuring the correct polarity of the power supply, the anti-reverse connection circuit improves the overall reliability and durability of the system; the anti-reverse connection circuit can be implemented by a diode or a relay, without any limitation here.

[0036] In one embodiment, the power module 2 also includes a step-down circuit (not shown) and a filter circuit (not shown). The step-down circuit is used to reduce the battery voltage to a voltage that can be used normally by the control module 1. The step-down circuit can provide a stable output voltage. Even if the input voltage fluctuates, the output voltage can be kept constant to improve stability. The filter circuit is used to remove the noise of the battery voltage. The filter circuit helps to reduce electromagnetic interference and improve the electromagnetic compatibility of the system. In vehicle-mounted electronic equipment, the electromagnetic interference is relatively large, and the stability of the control circuit can be improved by the filter circuit.

[0037] like Figure 4 As shown, Figure 4 This is a flow chart of an embodiment of a control method of the present invention, comprising the following steps: Step S11: The control module determines the position to be cleaned.

[0038] Step S12: Open the solenoid valve to open the passage to the position to be cleaned. The solenoid valve control circuit controls the opening or closing of the solenoid valve by controlling the conduction or cutoff of the first switch tube; when the solenoid valve is opened, the cleaning liquid can reach the designated cleaning position through the solenoid valve.

[0039] Step S13: Based on the position to be cleaned, the control module determines the length of the water channel and selects one water pump or two water pumps to work; if the water channel is shorter, the control module can choose to turn on one water pump (through the second end of the second switch tube) to provide cleaning fluid; if the water channel is longer, in order to ensure sufficient pressure and flow, the control module can choose to turn on two water pumps (through the third end of the second switch tube) to provide cleaning fluid.

[0040] Step S14: After cleaning is completed, the air pump is turned on to blow dry the water stains to complete the cleaning task; the control module then controls the second drive circuit to start the air pump to provide compressed air to the location to be cleaned; The second drive circuit controls the opening or closing of the air pump by controlling the switch tube; compressed air enters the position to be cleaned through the air pump to blow away the remaining water stains; after the drying process is completed, the control module will turn off the air pump to complete the entire cleaning task.

[0041] Through the above steps, the control module can accurately control the working state of the solenoid valve and water pump according to the different needs of the cleaning location, ensuring that the radar and camera are cleaned promptly and effectively when needed. This precise control helps improve cleaning efficiency, reduce unnecessary energy consumption, and ensure that the radar and camera are always in the best working state, thereby improving driving safety.

[0042] like Figure 5 As shown, Figure 5 for Figure 4 The schematic flow chart of step S11 in FIG. 1 includes the following steps: Step S111: The vehicle obtains the position to be cleaned through the position sensor; the sensor can be a camera based on image processing, used to identify dirt or obstructions on the surface of the radar or camera; the sensor can also be a sensor based on infrared, ultrasonic or other technologies, used to detect the presence of obstructions or dirt; the sensor converts the detected information into an electrical signal, and the sensor determines the specific position that needs to be cleaned based on the detected information.

[0043] Step S112: The cleaning position is sent to the control module through the CAN / LIN communication module; the control module performs logical judgments, such as verifying the validity of the data, determining the priority of cleaning, etc.; the control module determines whether a cleaning operation is required based on the received position information; if cleaning is required, the control module will further control components such as the solenoid valve and the water pump to perform the cleaning task.

[0044] The above are only implementation methods of the present application, and are not intended to limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A control circuit of a multi-way valve cleaning device, acting on an electrical device, characterized in that: include: Control module, CAN / LIN communication module, power module, solenoid valve control circuit, first drive circuit and second drive circuit; The CAN / LIN communication module is used to complete data exchange with the electric device, the CAN / LIN communication module is connected to the control module, and the CAN / LIN communication module transmits the received data to the control module; The control module is connected to the power module, and the power module supplies power to the control module; The control module is connected to the solenoid valve control circuit, the first drive circuit and the second drive circuit, and the control module controls the working states of the solenoid valve control circuit, the first drive circuit and the second drive circuit based on the data transmitted by the CAN / LIN communication module.

2. The control circuit according to claim 1, characterized in that: The solenoid valve control circuit includes a first diode, a second diode, a first resistor, a second resistor, a solenoid valve and a first switch tube; one end of the first resistor is connected to the output end of the control module, and the other end of the first resistor is connected to the first end of the first switch tube; the positive electrode of the first diode is connected to one end of the second resistor, the negative electrode of the first diode is connected to one end of the first resistor close to the control module, and the other end of the second resistor is connected to one end of the first resistor close to the first switch tube; the second end of the first switch tube is connected to one end of the solenoid valve, and the other end of the solenoid valve is connected to a first power supply; the positive electrode of the second diode is connected to one end of the solenoid valve close to the first switch tube, and the negative electrode of the second diode is connected to one end of the solenoid valve close to the first power supply; the third end of the first switch tube is grounded.

3. The control circuit according to claim 2, characterized in that: The first driving circuit is used to drive the water pump to work, and the second driving circuit is used to drive the air pump to work.

4. The control circuit according to claim 3, characterized in that: The first driving circuit includes a totem pole circuit, a third resistor, a second switch tube, a water pump and a third diode; the first end of the totem pole circuit is connected to the output end of the control module, the second end of the totem pole circuit is grounded, the third end of the totem pole circuit is connected to one end of the third resistor, and the fourth end of the totem pole circuit is connected to the second power supply; the other end of the third resistor is connected to the first end of the second switch tube; the second and third ends of the second switch tube are connected to one end of the water pump, and the other end of the water pump is connected to the second power supply; the positive electrode of the third diode is connected to one end of the water pump close to the second switch tube, and the negative electrode of the third diode is connected to one end of the water pump close to the second power supply; the fourth end of the second switch tube is grounded.

5. The control circuit according to claim 4, characterized in that: The second end of the second switch tube corresponds to one water pump, and the third end of the second switch tube corresponds to two water pumps.

6. The control circuit according to claim 5, characterized in that: The power supply module includes a sampling circuit, which can monitor the voltage and current changes of the control circuit in real time. The sampling circuit is connected to the control module, and the control module adjusts the output state based on the sampling data of the sampling circuit.

7. The control circuit according to claim 6, characterized in that: The power module further comprises an anti-reverse connection circuit, and the anti-reverse connection circuit is used to protect the normal operation of the control circuit.

8. The control circuit according to claim 7, characterized in that: The power module further comprises a step-down circuit and a filter circuit. The step-down circuit is used to reduce the battery voltage to a voltage that can be normally used by the control module, and the filter circuit is used to remove noise from the battery voltage.

9. A method for controlling a control circuit of a multi-way valve cleaning device according to any one of claims 1 to 8, characterized in that: The steps include: The control module determines the position that needs to be cleaned; Open the solenoid valve to open the passage to the location that needs to be cleaned; Based on the location to be cleaned, the control module determines the length of the water path and selects one or two water pumps to work; After cleaning is completed, turn on the air pump to dry the water stains to complete the cleaning task.

10. The control method according to claim 9, characterized in that: The control module determines the position to be cleaned including the following steps: The vehicle obtains the position to be cleaned through the position sensor; The cleaning position is sent to the control module via the CAN / LIN communication module.

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