CN202320213U

CN202320213U - Automatic controller of windscreen wiper of electric locomotive

Info

Publication number: CN202320213U
Application number: CN201120450784XU
Authority: CN
Inventors: 邓治国; 李方帆; 张爽
Original assignee: Zhuzhou Lince Group Co Ltd
Current assignee: Zhuzhou Lince Group Co Ltd
Priority date: 2011-11-15
Filing date: 2011-11-15
Publication date: 2012-07-11
Anticipated expiration: 2021-11-15

Abstract

The utility model provides an automatic controller of a windscreen wiper of an electric locomotive, comprising a microprocessor module composed of a single chip microcomputer and peripheral elements, an input module, a PWM (pulse-width modulation) driving module, a direct-current motor driving module, a position detection module and an overloading protection module; the rotating speed of a motor is adjusted based on a PWM pressure adjusting way; and the controlling of high speed, low speed, intermittence and stopping of the windscreen wiper of the electric locomotive is realized according to different input signals. The microprocessor of the automatic controller of the windscreen wiper of the electric locomotive adopts an STC12C5A08PWM single chip microcomputer and is a high-speed, low-power-consumption and super-strong-anti-interference single chip microcomputer so that a windscreen wiper system can be automatically recovered from an abnormal state. Two paths of the PWM support an ISP (internet service provider). According to input signals, the operation functions of the high speed, the low speed, the intermittence and the stopping of the windscreen wiper of the electric locomotive, and a lock-rotor protection function are realized, so that the service life of the windscreen wiper system can be prolonged and the safety operation of the electric locomotive is guaranteed.

Description

Electric locomotive windscreen wiper auto mat

Technical field

The utility model relates to a kind of electric locomotive windscreen wiper auto mat based on PWM.

Background technology

At present, the locomotive windscreen wiper system has experienced pneumatic type windscreen wiper system, electronic windscreen wiper system.Wherein electronic windscreen wiper system is divided into relay system windscreen wiper system, magneto-electric machine two-way windscreen wiper system, the development of forward magneto-electric machine PWM type windscreen wiper system again.

Rolling stock has proposed very high requirement to high speed, heavy duty, when exchanging the transmission development to environmental protection, comfort level, reduction life cycle cost, safety.This just to the locomotive electric cad system Equipment of Development except performance requriements is increasingly high; In electronization (electromechanical integration), multifunctional modular, sealingization, non-maintaining, intelligent development, require more to note environmental protection, reduce noise, improve reliability, reduce life cycle cost (cost of product adds maintenance cost).

Summary of the invention

The purpose of the utility model provides a kind of electric locomotive windscreen wiper auto mat based on PWM; It can have the electric locomotive Wiping device of brush DC machine to control to use effectively; Realize high speed, low speed, the intermittence of electric locomotive rain brush and the automatic guidance that stops; Make the locomotive Windshield that enough visibility arranged under the sleety weather situation, guarantee locomotive safety running.

The technical scheme of the utility model: a kind of electric locomotive windscreen wiper auto mat, it comprises microprocessor module, load module, PWM driver module, DC machine driver module, position detecting module and overload protection module; Employing is regulated motor speed based on the PWM voltage regulation mode, realizes high speed, low speed, the intermittence of electric locomotive rain brush and the control that stops respectively according to different input signals.It is the STC12C5A08PWM singlechip chip that its microprocessor module adopts model, integrated watchdog circuit and two-way PWM generation circuit in it.

Load module is made up of switch and optical coupling isolation circuit, and it is with the incoming signal input microprocessor module of inference elimination.

The PWM driver module is made up of high speed photo coupling and IC UCC27321P and resistance capacitance element, realizes the pwm signal of microprocessor module output is carried out shaping, Driven MOSFET.

The DC machine driver module is made up of the MOSFET direct current motor drive circuit, the conducting of the pwm signal control MOSFET through the PWM driver module with close, with the speed governing of realization to DC machine.

Position detecting module is made up of comparator and optical coupling isolation circuit, and it receives from the position signal of motor and with this signal input microprocessor module, makes microprocessor module can confirm the residing position of windscreen wiper.

The overload protection module is made up of DC machine current sampling circuit, comparator circuit and optical coupling isolation circuit; The DC machine electric current of DC machine current sampling circuit sampling DC machine driver module wherein; And this sampled signal inputed to comparator circuit; Comparator circuit comparator input signal voltage and VREF (Voltage Reference) determine whether to export the stall signal, and with the stall signal output to microprocessor module.

The STC12C5A08PWM singlechip chip that the microprocessor of the utility model electric locomotive windscreen wiper auto mat adopts; It is high speed, low-power consumption, superpower jamproof 8051 micro controller systems of new generation; The fully compatible tradition 8051 of command code, but fast 8～12 times of speed.The special-purpose reset circuit of inner integrated MAX810, windscreen wiper system can be realized from recovering from error state for watchdog circuit.Two-way PWM supports ISP.

The utility model is realized high speed, low speed, intermittence and the shut-down operation function of electric locomotive Wiper system and is realized the rotation-clogging protection function according to the signal of input, can prolong the service life and the safe operation that guarantees locomotive of Wiper system.

Description of drawings

Accompanying drawing is the structural representation block diagram of the utility model.

The specific embodiment

Referring to accompanying drawing; A kind of electric locomotive windscreen wiper auto mat; Comprise microprocessor module 1, load module 2, PWM driver module 3, DC machine driver module 4, position detecting module 5 and overload protection module 6; Employing is regulated motor speed based on the PWM voltage regulation mode, realizes high speed, low speed, the intermittence of electric locomotive rain brush and the control that stops respectively according to different input signals.It is the STC12C5A08PWM singlechip chip that microprocessor module 1 adopts model, integrated watchdog circuit and two-way PWM generation circuit in it.

Load module 2 is made up of switch and optical coupling isolation circuit, and it is with the incoming signal input microprocessor module 1 of inference elimination.

PWM driver module 3 is made up of high speed photo coupling and IC UCC27321P and resistance capacitance element, realizes the pwm signal of microprocessor module output is carried out shaping, Driven MOSFET.

DC machine driver module 4 is made up of the MOSFET direct current motor drive circuit, and the conducting of the control of the pwm signal through PWM driver module 3 MOSFET with close, with the speed governing of realization to DC machine.

Position detecting module 5 is made up of comparator and optical coupling isolation circuit, and it receives from the position signal of motor and with this signal input microprocessor module 1, makes microprocessor module 1 can confirm the residing position of windscreen wiper.

Overload protection module 6 is made up of DC machine current sampling circuit, comparator circuit and optical coupling isolation circuit; The DC machine electric current of DC machine current sampling circuit sampling DC machine driver module 4 wherein; And this sampled signal inputed to comparator circuit; Comparator circuit comparator input signal voltage and VREF (Voltage Reference) determine whether to export the stall signal, and with stall signal output to microprocessor module 1.

Incoming signal is sent into the different input ports of microprocessor module respectively after load module is handled, microprocessor through identification signal from which port with confirm the operation that will carry out, like high speed, low speed, intermittence or stop etc.Microprocessor module utilizes software to carry out algorithm process according to necessary operations, takes needed output policy with decision.When being input as high speed signal, output end of microprocessor output control signal makes the MOFET conducting of motor drive module, lets DC machine add the voltage full speed running of 110V; When being input as low speed signal, output end of microprocessor output pwm control signal, the MOSFET that makes motor drive module is by the cycle conducting of pwm control signal and end, and lets DC machine be operated in lower-speed state; When being input as intermittently signal, output end of microprocessor is exported pwm control signal and silence signal in turn, makes DC machine operation a period of time (rain brush swing one back and forth); Stop some seconds (adjustable) again; And then operation a period of time, stop again, so go down.When being input as danger signal, output end of microprocessor output control signal ends the MOSFET of motor drive module, and DC machine quits work.Each rotation period of DC machine can send an impulse singla; Position detecting module is delivered to an input end of microprocessor after with this signal conditioning; Microprocessor is according to this signal and combine software to judge the residing position of rain brush, when halted state, and rain brush is parked in initial/home position.When windscreen wiper system has mechanical breakdown or receives the external force effect DC machine load is increased when big; The stall detection module is delivered to the stall signal input end of microprocessor; Microprocessor sends speed-slackening signal at once according to the signal of this input end, lets DC machine quit work immediately.

The STC12C5A08PWM singlechip chip that the microprocessor of the utility model electric locomotive windscreen wiper auto mat adopts; It is high speed, low-power consumption, superpower jamproof 8051 micro controller systems of new generation; The fully compatible tradition 8051 of command code, but fast 8～12 times of speed.The special-purpose reset circuit of inner integrated MAX810, windscreen wiper system can be realized from recovering from error state for watchdog circuit.Two-way PWM has 8KB FLASH ROM in the sheet, 1280BRAM supports ISP.The application of watchdog circuit circuit; Make micro controller system can under the unmanned state, realize continuous working; Its principle of work is: an I/O pin of watchdog chip and micro controller system links to each other, and it periodically sends into high level (or low level) to this I/O pin on this pin of house dog through programming control, and this program statement is to be placed on other control statements centres of micro controller system dispersedly; In case micro controller system is absorbed in a certain program segment behind the program fleet when getting into the endless loop state owing to disturbing to cause; The program of writing the house dog pin just can not be performed, and in this time, watchdog circuit will be owing to can not get the signal that micro controller system is sent here; Just it with pin that the micro controller system reset pin links to each other on see a reset signal off; Micro controller system is resetted, and promptly program begins to carry out from the reference position of program store, has so just realized automatically reseting of micro controller system.House dog is watchdog timer again, is a timer circuit; An input is generally arranged, cry and feed dog, a RST end that outputs to MCU; In the time of the MCU normal operation, whenever hold to feeding dog, give the WDT zero clearing at a distance from signal of end time output; Do not feed dog if surpass specific time, (generally when program fleet), WDT regularly surpasses; Just return and provide a reset signal, MCU is resetted to MCU. prevent that MCU from crashing. the effect of house dog is exactly to prevent program generation endless loop, program fleet in other words.

The utility model is realized high speed, low speed, the intermittence of electric locomotive windscreen wiper system according to the signal of input and operating function such as is stopped; And realize that stall detects and braking function; Be implemented in the emergency braking of stall situation, the mechanical device of protection Wiper system and the service life that prolongs DC machine; Its good speed adjustment features, reliability height, long service life, noise are little, easy for installation.

Claims

1. electric locomotive windscreen wiper auto mat; It is characterized in that this auto mat is to realize respectively that according to different input signals high speed, low speed, the intermittence of electric locomotive rain brush and the control that stops to adopt the voltage regulation mode based on PWM; Regulate motor speed; This auto mat comprises microprocessor module (1), load module (2), PWM driver module (3), DC machine driver module (4), position detecting module (5) and overload protection module (6); It is the STC12C5A08PWM singlechip chip that its microprocessor module (1) adopts model, integrated watchdog circuit and two-way PWM generation circuit in it.

2. a kind of electric locomotive windscreen wiper auto mat as claimed in claim 1 is characterized in that said load module (2) is made up of the switch and the optical coupling isolation circuit of the incoming signal input microprocessor module (1) that is used for inference elimination.

3. a kind of electric locomotive windscreen wiper auto mat as claimed in claim 1 is characterized in that said PWM driver module (3) forms by realizing the pwm signal of microprocessor module output handled with the high speed photo coupling of Driven MOSFET and IC UCC27321P and resistance capacitance element.

4. a kind of electric locomotive windscreen wiper auto mat as claimed in claim 1; It is characterized in that said DC machine driver module (4) is made up of the MOSFET direct current motor drive circuit; The conducting of pwm signal control MOSFET through PWM driver module (3) with close, with the speed governing of realization to DC machine.

5. a kind of electric locomotive windscreen wiper auto mat as claimed in claim 1; It is characterized in that said position detecting module (5) is made up of comparator and optical coupling isolation circuit; It receives from the position signal of motor and with this signal input microprocessor module (1), makes microprocessor module (1) can confirm the residing position of windscreen wiper.

6. a kind of electric locomotive windscreen wiper auto mat as claimed in claim 1; It is characterized in that said overload protection module (6) is made up of DC machine current sampling circuit, comparator circuit and optical coupling isolation circuit; The DC machine electric current of DC machine current sampling circuit sampling DC machine driver module (4) wherein; And this sampled signal inputed to comparator circuit; Comparator circuit comparator input signal voltage and VREF (Voltage Reference) determine whether to export the stall signal, and with stall signal output to microprocessor module (1).