Wiper motor controller

Abstract

The utility model discloses a wiper motor controller which comprises a switch input module, a main control module, a motor and a rainfall sensor. The switch input module is in signal connection with the main control module, the switch input module comprises a plurality of controllable switches, and control signals are transmitted to the main control module by switching on or switching off the controllable switches. And the motor is in signal connection with the main control module and is configured to receive the control signal to control the operation of the motor. The rainfall sensor is in signal connection with the main control module and is configured to collect rainfall signals and transmit the rainfall signals to the main control module. According to the utility model, by integrating a plurality of functional modules, high integration and functional diversification of the wiper motor controller are realized, the overall performance of a system is improved, the use of external elements is reduced, and the complexity and cost of the system are reduced.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the field of wiper control, especially relates to a wiper motor controller. BACKGROUND

[0002] At present, 110V direct current is commonly used for power supply on the train, and the wiper controller and wiper motor on the train are directly powered by the 110V direct current power supply. Therefore, the existing train usually adopts mechanical wiper, and the start-stop and frequency control of the vehicle-mounted wiper are realized manually by the driver. When the train is in an open environment, the driver's field of vision is limited due to the rain and sand scouring the front windshield of the train, and the driver manually controls the wiper according to the actual situation; but since the existing mechanical wiper has poor controllability, it can only realize high-speed or low-speed rotation of the motor in function, and it is difficult to realize other functions, and there is a limitation of function. SUMMARY

[0003] The technical object of the utility model is to provide a wiper motor controller to solve the problem of the limitation of the existing train wiper function.

[0004] To solve the above problems, the technical scheme of the utility model is as follows:

[0005] A wiper motor controller, comprising:

[0006] a switch input module, a main control module, a motor and a rainfall sensor;

[0007] The switch input module is signal connected with the main control module, the switch input module comprises a plurality of controllable switches, and the controllable switches are closed or opened to transmit control signals to the main control module;

[0008] The motor is signal connected with the main control module and is configured to receive control signals to control the operation of the motor;

[0009] The rainfall sensor is signal connected with the main control module and is configured to collect rainfall size signals and transmit them to the main control module.

[0010] The main control module comprises a power filter circuit, a main control chip and an H-bridge drive circuit;

[0011] The power filter circuit is connected with an external power supply and is configured to filter and stabilize the external power supply to obtain a direct current stabilized signal, and input the direct current stabilized signal to the main control chip and the H-bridge drive circuit to provide power supply;

[0012] The main control chip is provided with a plurality of interfaces corresponding to the controllable switches respectively, and receives control signals from the switch input module;

[0013] The H-bridge driving circuit is respectively connected with the motor and the main control chip signal, and the H-bridge driving circuit is controlled based on the control signal of the switch input module to change the running state of the motor.

[0014] Further preferably, a power supply anti-reverse circuit is further arranged between the power supply filter circuit and the H-bridge driving circuit, and is configured to prevent damage to the wiper motor controller when the positive and negative poles of the power supply are connected reversely.

[0015] Further preferably, the main control module further comprises a collection circuit, including a current sensor, a current filter circuit and a PCB temperature sensor, and the main control chip is correspondingly integrated with an operational amplifier amplification unit and an ADC unit.

[0016] The current sensor is connected with the motor signal and is configured to monitor the current of the motor in real time to obtain a current monitoring signal.

[0017] The current filter circuit is connected with the current sensor signal and is configured to filter the current monitoring signal.

[0018] The operational amplifier amplification unit is connected with the current filter circuit signal and is configured to amplify the filtered current monitoring signal.

[0019] The PCB temperature sensor is configured to monitor the temperature of the PCB in the wiper motor controller in real time to obtain a temperature monitoring signal.

[0020] The ADC unit is connected with the PCB temperature sensor and the operational amplifier amplification unit signal respectively, and is configured to sample the current monitoring signal and the temperature monitoring signal to obtain corresponding digital signals.

[0021] Further preferably, the main control chip is further integrated with an H-bridge pre-driving unit connected with the H-bridge driving circuit, which is configured to convert the low-power signal output by the main control chip into a high-power signal capable of driving the H-bridge driving circuit, thereby realizing accurate control of the motor.

[0022] Further preferably, the main control module further comprises a CAN filter circuit, and the main control chip is correspondingly integrated with a CAN transceiver, which is configured to realize communication with the motor and the rain sensor.

[0023] Further preferably, the main control module further comprises a debugging circuit, and the main control chip is correspondingly integrated with a SWD debugging interface, and the main control chip is debugged through the SWD debugging interface.

[0024] The above technical scheme is adopted, and the present application has the following advantages and positive effects compared with the prior art.

[0025] The utility model discloses a plurality of interfaces, with the controllable switch of switch input module one to one, can receive multiple control signals, meet the operation demand under different scenes, improve the versatility and adaptability of controller.

[0026] The rain sensor is arranged, can collect the rain amount signal in real time and transfer to the main control module, realizes the function of automatically adjusting the wiper operation speed according to the rain amount, reduces the manual intervention, improves the driving safety and convenience.

[0027] Through the integration of multiple function modules, the high integration and functional diversification of the wiper motor controller are realized, which not only improves the overall performance of the system, but also reduces the use of external components, reduces the system complexity and cost. BRIEF DESCRIPTION OF DRAWINGS

[0028] Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments with reference made to the accompanying drawings. The drawings are for purposes of illustration only and are not considered as limiting the application.

[0029] Figure 1 The utility model provides a kind of overall system diagram of wiper motor controller;

[0030] Figure 2 The utility model provides a kind of specific example diagram of wiper motor controller. DETAILED DESCRIPTION

[0031] In order to more clearly illustrate the technical scheme in the embodiments of the present application or the prior art, specific embodiments of the present application will be described below with reference to the drawings. Obviously, the drawings in the following description only some embodiments of the present application, for those skilled in the art, without creative labor, can also obtain other drawings and other embodiments according to these drawings.

[0032] In order to make the drawing simple, only the part related to the present application is shown in each drawing, which does not represent the actual structure of the product. In addition, in order to make the drawing simple and easy to understand, the components with the same structure or function in some drawings are only schematically shown one or only marked one. In this paper, "one" not only means "only one", but also can mean "more than one" situation.

[0033] The utility model proposes a kind of wiper motor controller further in detail in the following combining with drawings and specific embodiments. According to the following description and claims, the advantages and features of the present application will be more clear.

[0034] EMBODIMENT

[0035] Referring to Figure 1 and Figure 2 , the embodiment provides a wiper motor controller to Figure 1 The overall system of the embodiment can be divided into multiple components, namely including: a switch input module, a main control module, a motor and a rain sensor. Figure 1 The left side of the power supply is a power supply, which is selected as a common 110V power supply for the train. The current of the power supply is divided into two paths, one of which enters the main control module, and the other enters the switch module. A plurality of controllable switches are arranged in the switch input module. Specifically, the switch input module is a rotary knob switch. When the rotary knob is turned to any switch gear position, the corresponding controllable switch is closed, thereby realizing conduction. When one of the paths is conducted, the electrical signal generated by the conduction enters the interface of the main control module. The main control module can perform different operations according to different signals received from the switch input module.

[0036] The motor is signal connected with the main control module, and the motor receives control signals from the main control module to control the operation of the motor. The rain sensor is signal connected with the main control module, and is used to obtain a rain amount signal and transmit the signal to the main control module. It is worth mentioning that Figure 1 The water pump is also arranged in the embodiment, and the water pump is signal connected with the main control module and controlled by the main control module to perform water spraying operation.

[0037] Specifically, in the embodiment, the switch input module includes a car washing gear, an automatic gear, a water spraying gear, an intermittent gear, a low speed gear and a high speed gear. When the car washing gear is selected, the main control module controls the motor to make the wiper enter the car washing position. When the automatic gear is selected, the main control module automatically controls the speed of the motor according to the rain amount. When the water spraying gear is selected, the main control module controls the water pump to spray water. When the intermittent gear is selected, the main control module controls the motor to make the wiper swing intermittently. When the low speed gear is selected, the main control module controls the motor to make the wiper swing at low speed. When the high speed gear is selected, the main control module controls the motor to make the wiper swing at high speed.

[0038] Next, referring to Figure 2 In the embodiment, the main control module includes a power filter circuit, a main control chip and an H-bridge driving circuit. The power filter circuit is connected with an external power supply, and is used to filter and stabilize the external power supply to obtain a direct current stabilized signal, which is input to the power management unit of the main control chip and the H-bridge driving circuit to provide power. The main control chip is provided with a plurality of interfaces corresponding to the controllable switches one by one, and receives control signals from the switch input module, namely the multiple different modes mentioned above. The H-bridge driving circuit is signal connected with the motor and the main control chip, and the main control chip controls the H-bridge driving circuit based on the control signals of the switch input module to change the operation state of the motor. Since the H-bridge driving circuit is a common electronic circuit, it will not be described in detail here.

[0039] Preferably, a power supply anti-reverse circuit is further arranged between the power filter circuit and the H-bridge drive circuit, which prevents damage to the wiper motor controller when the positive and negative poles of the power supply are connected reversely.

[0040] Preferably, the main control module further comprises a collection circuit, specifically including a current sensor, a current filter circuit and a PCB temperature sensor, and the main control chip is integrated with an operational amplifier amplification unit and an ADC unit correspondingly. The current sensor on one side is connected with the motor signal for real-time monitoring of the current of the motor to obtain a current monitoring signal. The current monitoring signal is then sent to the current filter circuit for filtering processing. The operational amplifier amplification unit is connected with the current filter circuit signal for amplifying the current monitoring signal after filtering processing. On the other side, the PCB temperature sensor is used for real-time temperature monitoring of the PCB in the wiper motor controller to obtain a temperature monitoring signal. The ADC unit is connected with the PCB temperature sensor and the operational amplifier amplification unit signal respectively for sampling the current monitoring signal and the temperature monitoring signal to obtain corresponding digital signals. Specifically, the motor current monitoring can be used for protection against motor stall, control of motor self-locking force through control of motor current and realization of dry wiper protection. The PCB temperature monitoring is used for monitoring the temperature of the PCB to realize over-temperature protection.

[0041] Preferably, the main control chip is further integrated with an H-bridge pre-driving unit connected with the H-bridge drive circuit signal, which mainly converts the low-power signal output by the main control chip into a high-power signal capable of driving the H-bridge drive circuit, so as to realize accurate control of the motor.

[0042] Preferably, the main control module further comprises a CAN filter circuit, and the main control chip is integrated with a CAN transceiver correspondingly, which realizes communication with the motor (including the main motor and the auxiliary motor) and the rainfall sensor through the CAN filter circuit.

[0043] Preferably, the main control module further comprises a debugging circuit, and the main control chip is integrated with an SWD debugging interface correspondingly, which is used for debugging the main control chip.

[0044] The embodiments of the utility model are described in detail above in combination with the drawings, but the utility model is not limited to the above-mentioned embodiments. Even if various changes are made to the utility model, provided that the changes belong to the scope of the utility model claims and equivalent technologies, they still fall within the protection scope of the utility model.

Claims

1. A wiper motor controller, characterized in that, include: Switch input module, main control module, motor and rain sensor; The switch input module is signal-connected to the main control module. The switch input module includes several controllable switches, and control signals are transmitted to the main control module by closing or opening the controllable switches. The motor is signal-connected to the main control module and is configured to receive control signals to control the operation of the motor; The rain sensor is connected to the main control module and is configured to collect rainfall magnitude signals and transmit them to the main control module.

2. The wiper motor controller according to claim 1, characterized in that, The main control module includes a power filtering circuit, a main control chip, and an H-bridge drive circuit. The power filtering circuit is connected to an external power source and is configured to filter and regulate the external power source to obtain a DC regulated signal, which is then input to the main control chip and the H-bridge drive circuit to provide power. The main control chip has multiple interfaces, each corresponding to one of the controllable switches, to receive control signals from the switch input module. The H-bridge drive circuit is connected to the motor and the main control chip respectively. Based on the control signal of the switch input module, the H-bridge drive circuit is controlled to change the operating state of the motor.

3. The wiper motor controller according to claim 2, characterized in that, A reverse power supply circuit is also provided between the power supply filtering circuit and the H-bridge drive circuit, which is configured to prevent damage to the wiper motor controller when the positive and negative terminals of the power supply are reversed.

4. The wiper motor controller according to claim 2, characterized in that, The main control module also includes a data acquisition circuit, including a current sensor, a current filtering circuit and a PCB temperature sensor. Correspondingly, the main control chip integrates an operational amplifier unit and an ADC unit. The current sensor is connected to the motor signal and configured to monitor the motor current in real time to obtain a current monitoring signal; The current filtering circuit is connected to the current sensor signal and is configured to filter the current monitoring signal. The operational amplifier amplification unit is signal-connected to the current filtering circuit and is configured to amplify the filtered current monitoring signal; The PCB temperature sensor is configured to monitor the temperature of the PCB board in the wiper motor controller in real time and obtain a temperature monitoring signal. The ADC unit is connected to the PCB temperature sensor and the operational amplifier amplification unit respectively, and is configured to sample the current monitoring signal and the temperature monitoring signal to obtain the corresponding digital signal.

5. The wiper motor controller according to claim 2, characterized in that, The main control chip also integrates an H-bridge pre-drive unit that is connected to the H-bridge drive circuit. It is configured to convert the low-power signal output by the main control chip into a high-power signal that can drive the H-bridge drive circuit, thereby achieving precise control of the motor.

6. The wiper motor controller according to claim 2, characterized in that, The main control module also includes a CAN filter circuit. Correspondingly, the main control chip integrates a CAN transceiver, which is configured to communicate with the motor and the rain sensor.

7. The wiper motor controller according to claim 2, characterized in that, The main control module also includes a debugging circuit. Correspondingly, the main control chip integrates an SWD debugging interface, through which the main control chip is debugged.

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