CN101004600A

CN101004600A - Method for controlling digital type controller of car electrical motor for scraping rain

Info

Publication number: CN101004600A
Application number: CN 200710071634
Authority: CN
Inventors: 崔刚; 周连科; 陈亮; 杨孝宗; 刘宏伟; 左德承; 吴智博; 董剑; 舒燕君; 苗百利; 向琳; 张展; 罗丹彦; 王玲; 温东新
Original assignee: Harbin Institute of Technology Shenzhen
Current assignee: Harbin Institute of Technology Shenzhen
Priority date: 2007-01-15
Filing date: 2007-01-15
Publication date: 2007-07-25

Abstract

The control method of the digital controller of the automobile wiper motor relates to a control method of the automobile wiper motor. In order to solve the problems of low reliability, low accuracy and easy occurrence of mechanical failure in the existing control method, the The method is as follows: the chip is initialized, the switch state identification chip is coded according to the level of the output pin of the combined switch, the microcontroller reads the code, and judges whether it is a closed gear according to the code table; Intermittent gear, no intermittent gear, according to different gears, send action commands to the motor drive chip according to the program, it is intermittent gear, output the action command of the intermittent gear to the motor driver chip through the counter, and drive the corresponding gear coil of the motor to run; it is closed gear, judge Whether the homing signal is at low level, if yes, the execution stops, otherwise the original gear operation is maintained, and when the homing signal jumps to low level, the motor driver chip stops supplying power to the wiper motor. It thus makes the implementation more flexible and convenient.

Description

The control method of the digital controller of automobile wiper motor

Technical field

The present invention relates to a kind of control method of windshield wiper motor.

Background technology

The windshield wiper of cleaning vehicle panes is provided the power of motion by general electrical motor for scraping rain, rotating speed when mostly controlling the stopping of electrical motor for scraping rain, motion, quiescent interval and motion by the machinery of forming by combined switch, timer chip and relay etc., thus realize the cleaning of windshield wiper, scrape water at a high speed, low speed is scraped water and scraped functions such as water intermittence.Have following problem in the control method now: reliability is low, accuracy is not high, problems such as there was a mechanical failure easily.

Summary of the invention

The reliability that exists in the existing control method is low, accuracy is not high in order to solve, problems such as there was a mechanical failure easily, and a kind of control method of digital controller of automobile wiper motor is provided.

The digital controller of automobile wiper motor comprises combined switch K, and it also comprises on off state identification chip 1, microcontroller 2 and motor drive ic 3; Each level state output pin of combined switch K is connected on the input end of on off state identification chip 1, the two-way communication ports of on off state identification chip 1 is connected on the two-way communication ports of microcontroller 2, two output terminals of microcontroller 2 connect two input ends of motor drive ic 3, two output terminals of motor drive ic 3 connect two input ends of electrical motor for scraping rain M respectively, the motor playback signal output part of the turbine switch 4 on the electrical motor for scraping rain M connects the signal input part of microcontroller 2 respectively, and the every rotation one-period of electrical motor for scraping rain M is got back to position of rest and all passed through turbine switch 4 to a playback of microcontroller 2 outputs signal.

Described method is finished by the following step:

Step 1: chip initiation;

Step 2: on off state identification chip 1 is encoded according to the height of the level of each output pin of combined switch K, and exports to microcontroller 2;

Step 3: the coding of microcontroller 2 read switch state chips 1;

Step 4: microcontroller 2 is according to the gear of the coding schedule judgement combined switch K of inner setting, and microcontroller 2 distinguishes whether be to cut out gear; Not, execution in step five; Be execution in step nine;

Step 5: microcontroller 2 is according to the gear of the coding schedule judgement combined switch K of inner setting, and microcontroller 2 distinguishes whether be the gear at intermittence; Not, execution in step six; Be execution in step seven;

Step 6: microcontroller 2 sends the corresponding action order according to the different gears of combined switch K by the program of establishment in advance, and action command is sent in the motor drive ic 3; Execution in step eight;

Step 7: by the counter in the microcontroller 2 output combined switch K intermittence gear action command, this action command sends in the motor drive ic 3; Execution in step eight;

Step 8: motor drive ic 3 drives the corresponding gear coil of electrical motor for scraping rain M and turns round;

Step 9: microcontroller 2 judges whether the playback signal is low level signal; Not, execution in step ten; Be; Execution in step 11;

Step 10: the playback signal is a high level signal, then keeps the former gear running of electrical motor for scraping rain M, when the playback signal is jumped to low level down; Execution in step 11;

Step 11: microcontroller 2 order motor drive ics 3 stop the power supply to electrical motor for scraping rain M, and electrical motor for scraping rain M stops on the position of rest of turbine switch 4.

The present invention directly drives electrical motor for scraping rain M by digital chip for driving, on chip programming more accurately and reliably, and adopt programmed counting to set intermittently time slot, degree of accuracy is than the traditional approach height, the quiescent interval of electrical motor for scraping rain M defines by program, thereby make realization more flexible, and be greatly improved on the also more traditional control method of its degree of accuracy.

Description of drawings

Fig. 1 is the structural representation of the digital controller of car electrical motor for scraping rain; Fig. 2 is the synoptic diagram of turbine switch 4; Fig. 3 is the process flow diagram of control method of the digital controller of car electrical motor for scraping rain.

Embodiment

Embodiment one: in conjunction with Fig. 1, Fig. 2, Fig. 3 present embodiment is described, the digital controller of the automobile wiper motor in the present embodiment comprises combined switch K, and it also comprises on off state identification chip 1, microcontroller 2 and motor drive ic 3; Each level state output pin of combined switch K is connected on the input end of on off state identification chip 1, the two-way communication ports of on off state identification chip 1 is connected on the two-way communication ports of microcontroller 2, two output terminals of microcontroller 2 connect two input ends of motor drive ic 3, two output terminals of motor drive ic 3 connect two input ends of electrical motor for scraping rain M respectively, the motor playback signal output part of the turbine switch 4 on the electrical motor for scraping rain M connects the signal input part of microcontroller 2 respectively, and the every rotation one-period of electrical motor for scraping rain M is got back to position of rest and all passed through turbine switch 4 to a playback of microcontroller 2 outputs signal.

Described method is finished by the following step:

Step 1: chip initiation;

Step 3: the coding of microcontroller 2 read switch state chips 1;

Step 9: microcontroller 2 judges whether the playback signal is low level signal; Not, execution in step ten; Be execution in step 11;

May occur motor inertia when closing electrical motor for scraping rain M and cause electrical motor for scraping rain M to turn over stop position, allow electrical motor for scraping rain M to rotate through a little angle this moment, promptly when the playback signal uprises owing to inertia, refuses fill order.

Microcontroller 2 is just controlled corresponding gear action command by the level of controlling high low speed coil I/O mouth.

Claims

1. The control method of the digital controller of the automobile wiper motor. The digital controller of the automobile wiper motor includes a combined switch (K), which also includes a switch state recognition chip (1), a microcontroller (2) and a motor The drive chip (3); each level state output pin of the combined switch (K) is connected to the input end of the switch state recognition chip (1) respectively, and the bidirectional communication port of the switch state recognition chip (1) is connected to the microcontroller On a two-way communication port of the controller (2), the two output terminals of the microcontroller (2) are connected to the two input terminals of the motor driver chip (3), and the two output terminals of the motor driver chip (3) are respectively connected to the wiper The two input terminals of the motor (M), the motor homing signal output terminals of the turbine switch (4) on the wiper motor (M) are respectively connected to the signal input terminals of the microcontroller (2), and the wiper motor (M) Rotate one cycle and get back to the stop position to output a homing signal to the microcontroller (2) through the turbine switch (4).

The method is accomplished by the following steps:

Step 1: chip initialization;

Step 2: the switch state identification chip (1) encodes the level of each output pin of the combination switch (K), and outputs it to the microcontroller (2);

Step 3: the microcontroller (2) reads the code of the switch state chip (1);

Step 4: The microcontroller (2) judges the gear position of the combination switch (K) according to the internally set code table, and the microcontroller (2) distinguishes whether it is a closed gear; no, perform step 5; yes, perform step 9 ;

Step 5: The microcontroller (2) judges the gear position of the combination switch (K) according to the internally set code table, and the microcontroller (2) distinguishes whether it is an intermittent gear; if no, perform step 6; yes, perform step 7 ;

Step 6: The micro-controller (2) sends corresponding action commands according to the different positions of the combination switch (K) according to the pre-programmed program, and sends the action commands to the motor driver chip (3); execute step 8;

Step 7: output the action command of the intermittent gear position of the combination switch (K) through the counter in the microcontroller (2), and the action command is sent to the motor driver chip (3); perform step 8;

Step 8: The motor driver chip (3) drives the corresponding gear coil of the wiper motor (M) to run;

Step nine: the microcontroller (2) judges whether the homing signal is a low-level signal; no, execute step ten; yes, execute step eleven;

Step 10: When the homing signal is a high-level signal, maintain the original gear operation of the wiper motor (M), and when the homing signal jumps down to a low level; go to step 11;

Step eleven: the microcontroller (2) commands the motor drive chip (3) to stop supplying power to the wiper motor M, and the wiper motor (M) stops at the stop position of the turbine switch (4).