CN207535866U - Automotive wiper motor automatic control system - Google Patents

Abstract

The utility model discloses a kind of Wiper system being not only simple and efficient but also energy automatic and accurate controls, and to solve the easy generation maloperation complicated for operation of current manual Wiper system, and automatic rain brush system controls the shortcomings that complicated, of high cost.In said system microprocessor detect first rain brush switch position it is whether in the closed position and whether state of ignition switch in ON states, if the microprocessor detects that condition meets, so rain sensor module detects the rainwater of windscreen surface, splashing water is when some liquids, rain sensor is issued by signal to microprocessor, after being calculated after microprocessor internal processing and accurately with reference to current speed signal ULN2803APG driving chips are sent a signal to by I/O mouthfuls, driving chip will control signal to be further amplified that relay cathode is controlled to be grounded the time, it is attracted corresponding relay.And then realize that interval scrapes water, low speed scrapes water, scrapes three different gears of water at a high speed.

Description

Automobile wiper motor automatic control system

technical field

The utility model relates to an automatic control system of an automobile wiper motor, which belongs to the technical field of automobile accessories.

Background technique

In the traditional wiper control system, the driver manually controls the wiper speed switch to change the swing speed of the wiper. This wiper control system will cause the following problems:

When the driver's line of sight becomes blurred when it rains, the possibility of the driver making a wrong operation in a hurry and causing a traffic accident is greatly increased. According to incomplete statistics, 7% of accidents in driving in rainy days all over the world are caused by the driver manually operating the wiper switch.

In view of this, it is necessary to improve the traditional automobile wiper motor control system.

Contents of the invention

In view of the above problems, the utility model provides a control system that can automatically and accurately control the operation of the automobile wiper motor.

The technical solution adopted by the utility model is to provide an automatic control system for the automobile wiper motor, including a rain sensor, a vehicle speed sensor, an ignition switch, a wiper combination switch, a power management module, an automobile wiper motor, a relay, a microprocessor and a ULN2803APG driver chip.

The vehicle speed sensor, the rain sensor, the wiper combination switch and the ignition switch are connected to the microprocessor, the microprocessor and the ULN2803APG driver chip are powered by the power management module, the output signal of the microprocessor is connected to the ULN2803APG driver chip, and the ULN2803APG driver chip is controlled by the control relay The wiper motor, and then realize the automatic control of the car wiper system.

At the beginning of the control system work, the microprocessor first detects whether the position of the wiper switch is in the off position and whether the ignition switch is in the ON state. If the microprocessor detects that the conditions are met, then the rain sensor and the vehicle speed sensor will collect the signal and input it to the The microprocessor converts the analog signal into a digital signal through AD conversion inside the microprocessor, and the final signal is recognized by the microprocessor as a signal for accurately controlling the wiper motor.

The advantages of the utility model control system are:

(1) This control system will not interfere with the switch control of the original vehicle. Once the original vehicle control system intervenes, the system will automatically stop signal collection.

(2) Complementary with the control system of the original car, when the original car system fails, the wiper system will not be paralyzed.

(3) Before the control system intervenes, the microprocessor collects two important signals of the wiper switch and the ignition switch. The main purpose of collecting the wiper switch signal is to prevent the two systems from interfering with each other, and the signal of the ignition switch is mainly because the start gear system does not work. , to ensure the smooth start of the vehicle.

(4) The problem of complex operation of the original wiper is solved.

(5) The implementation difficulty is small, the reliability is high, and it is easy to refit.

(6) The structure is simple, easy to manufacture and cheap.

Description of drawings

Fig. 1 is a schematic diagram of the connection of the automatic control system of the automobile wiper motor of the utility model.

Detailed ways:

Below in conjunction with accompanying drawing, the utility model is further described.

The specific working principle of the utility model is that the microprocessor first detects whether the position of the wiper switch is in the closed position and whether the state of the ignition switch is in the ON state. If the microprocessor detects that the conditions are met, the rain sensor module detects that the windshield When there are some liquid substances such as rainwater and splashing water on the surface, the rain sensor will send a signal to the microprocessor. After the internal processing of the microprocessor and combined with the current vehicle speed signal for accurate calculation, the signal will be sent to the ULN2803APG driver through the I/O port Chip, the driver chip further amplifies the control signal to control the negative grounding time of the relay, so that the corresponding relay is closed. The control system can realize three different stalls of intermittent wipe, low-speed wipe and high-speed wipe. If the collected rainfall information is within the control range of the intermittent gear, then the microprocessor will send a control signal to the ULN2803APG driver chip. The drive chip controls the negative electrode of the intermittent and low-speed gear relays to be grounded, so that the intermittent and low-speed gear relays are closed. The specific control logic is: the microprocessor controls the negative grounding time for a long time, and the negative grounding frequency is high, and the wiper motor intermittently works for a long time. At this time, the corresponding amount of rainwater is large, the negative grounding time is short, and the negative grounding frequency is low. The intermittent working time of the wiper motor is short, and the corresponding amount of rain is less at this time; if the collected rainfall information is within the control range of the low-speed gear, the microprocessor will send a control signal to the drive chip to control the intermittent , The grounding time of the negative pole of the low-speed relay makes the wiper motor work, and the corresponding rainwater is in the middle at this time; the same principle, if the collected rainfall information is within the control range of the high-speed gear, then the microprocessor will send a control signal to ULN2803APG driver chip. The drive chip controls the negative pole of the high-speed relay to ground, and controls the high-speed relay to pull in. That is to realize the high-speed operation of the wiper motor. At this time, the rainfall information collected by the corresponding rainfall sensor is the largest.

In addition, the microprocessor will monitor whether the driver intends to operate the combined wiper switch in real time. If the microprocessor detects that the driver operates the combined wiper switch, the microprocessor will recognize the signal of the combined wiper switch. At this time, no matter the rain sensor What kind of rainfall information is collected will not be recognized by the microprocessor, that is to say, the automatic control wiper system will not intervene in the control work at this time. In this way, when the automatic control system breaks down, not only the automatic control system cannot perform the automatic wiper action, but also the original intermittent, low-speed and high-speed functions of the car cannot perform corresponding actions normally, that is, the entire wiper system is completely paralyzed. , increasing the risk of driving. In addition, the return function of the car wiper system will continue to use the control mode of the original car. The automatic control system will not interfere with the automatic return function of the wiper, and there will be no phenomenon that the wiper does not return when the automatic control system fails. While realizing automatic control, this control system will also complement the control system of the original car, which is equivalent to adding a set of control devices on the basis of the original car. When the control system of the original car fails, the control system can continue to control The wipers work. To prevent the wiper system from being paralyzed.

The basic principles, main features and advantages of the utility model have been described above. Those skilled in the art should understand that the utility model is not limited by the above-mentioned embodiments. The above-mentioned embodiments and descriptions only illustrate the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model The new model also has various changes and improvements, and these changes and improvements all fall within the scope of the claimed utility model. The scope of protection required by the utility model is defined by the appended claims and their equivalents.

Claims (9)

1. Automobile wiper motor automatic control system, characterized in that it is composed of rain sensor, vehicle speed sensor, wiper combination switch, ignition switch, power management module, automobile wiper motor, relay, microprocessor and ULN2803APG drive chip, wherein said Vehicle speed sensor and rainfall sensor and wiper combination switch and ignition switch are connected with microprocessor, described microprocessor and ULN2803APG driving chip are connected with power management module, described microprocessor output signal is connected with ULN2803APG driving chip, described The ULN2803APG driver chip controls the wiper motor by controlling the relay. 2. The automatic control system of the automobile wiper motor according to claim 1, wherein the power management module is powered by a microprocessor, a relay, and a ULN2803APG driver chip. 3. according to the described automobile wiper motor automatic control system of claim 1, it is characterized in that, described control system has the collection function of wiper combination switch, ignition switch signal, and described wiper combination switch, ignition switch signal will detect wiper switch signal Whether it is in the off position and whether the ignition switch is in the ON position will send the collected signal to the microprocessor, and the microprocessor will continue to collect the signals of the vehicle speed sensor and the rain sensor when judging that these two conditions are met. 4. according to the described automobile wiper motor automatic control system of claim 3, it is characterized in that, described vehicle speed sensor and rain sensor are all connected to microprocessor, detect vehicle speed and rainfall signal by vehicle speed sensor and rain sensor and will detect The signal is sent to the microprocessor, and the microprocessor recognizes the received vehicle speed and rainfall signals, and after precise calculation, finally sends the control signal to the ULN2803APG driver chip. 5. The automatic control system of the automobile wiper motor according to claim 4, wherein the ULN2803APG drive chip further amplifies the signal after receiving the control signal from the microprocessor to control the negative pole of the relay to be grounded, and finally realize the control of the wiper motor. automatic control. 6. The automatic control system of the automobile wiper motor according to claim 5, wherein the relay is a 5V relay. 7. The automatic control system of the automobile wiper motor according to claim 2, wherein the wiper switch is connected to the microprocessor, and when the microprocessor detects the gear position signal of the wiper combination switch, it can automatically cut off the rain sensor. The detected rainfall signal, at this time, the control system does not intervene to prevent the two systems from interfering with each other. 8. The automatic control system of the automobile wiper motor according to claim 3, wherein the ignition switch is connected to the microprocessor, and when the microprocessor detects that the ignition switch signal is in the three stalls of OFF, ACC, and START, The control system does not intervene in the work. 9. The automatic control system of the automobile wiper motor according to claim 7, wherein the control system is complementary to the control system of the original vehicle, and the wiper control system will not be paralyzed when the original vehicle system fails.