Research On The Testing Bed System Of Automobile's Electro-component

1.PrefaceThe engine is an automotive heart.It can ensure the automobile drives normally. Electricity control system of the engine is the important part that assurance engine to work normally. The electronics component is an electricity to control the whole system that constitutes part and relates to the whole electricity to control system. So whether the electronics component is qualified or not relate to the whole quality of automobile.Along with the development of the automobile industry, the automobile produces profession compete of turn worse, the engine quality of the machine have more and more high request to the automobile. Be showed from these the electronics component has to be had higher accuracy.The factory of automobile produces need to have the high quality test equipment of high-efficiency electronics component.The testing machine is the main means that gets the system electronics component accuracy test. Fly to develop soon along with the automobile industry in recent years,the request of testing machine become to be more and more high . Traditional automobile's engining electricity to control the system component examinations is all single examinations, and examines in the meantime of the quantity is little, doing like this a wave to take a lot of time manpower,not enough economy, and can't carry out the computer concentration control.The so-called automobile engines machine electricity to control the system component testing machine, is to install the electronics component of experimenting on the stage, is imitated the car condition by the test equipment, pass the calculator control to measure the electronics component to collect a data to carry on analytical contrast, with this on trial equipments that judges the electronics component accuracy.This topic come from the quality department of the FAW Car Co., Ltd. It is a quality to protect one of a point construction items, avoid lose to have the certain actual meaning and economic value to the factory house.2, The constitute of systemAccording to the user's request, the automobile engine's electricity to control the system component testing machine request to include an oil temperature sensor testing system,roatating speed sensors testing measurement, the instrument panel test system and Light the fire item testing measurement.For carrying out the whole control of system to stop or starting ,switch control and adjusting to control , so we want to include the I/O need to connect and enlarge electric circuit etc.. the system in the pedestal movement process has to be collected an oil temperature and turned to wait parameter soon in good time, so the system have to include to measure what these datas need to adjust a reason electric circuit, conversion electric circuit etc..The oil temperature sensor testing system include a set of standard temperature sensors with seven sets of is measure temperature to spread the feeling machine(all is hot electric resistance), the calculator passes 7483 I/O control electric circuit of the plank cards to heat to the oil liquid, spreading the feeling machine to collect the temperature data and collect the mold piece to send back a calculator to take in to compare through the DUT data, from here judge an oil temperature to spread whether the feeling machine accuracy meet an accuracy request or not.The rotating speed sensors testing measurement mainly test a vehicle-use magnetoelectricity type to turn soon spread the feeling machine, the calculator passes 7483 plank cards from take of the D/A function regulated the direct current power supply electric voltage size to control electric motor to turn soon, the electric motor turn soon make use of the position type PID calculate way to carry on a control, at dynamoelectric on board install standard to turn soon spread the feeling machine and is measure to turn soon spread the feeling machine, in the meantime spread two roads the data that the feeling machine adopt send back a calculator to carry on a comparison, judge is measure to turn soon spread whether the feeling machine meets an accuracy request or not.The instrument panel test system includes the switch measurement imitating measurement system, the numerical measurement system.The switch measurement's system is the I/O that passes plank PC-7483 card to send out the signal realization test function.The amount of switch control signal is divided into high give or get an electric shock low electricity in Ping-ho even, this is the amount of switch part to is even for high electricityto open, low give or get an electric shock an even pass, the rest part is even for low electricity to open, high give or get an electric shock an even pass, the calculator send out of the electricity an ordinary letter number is the milli-voloter class, so the signal wants to enlarge electric circuit through a class after send out.The switch measurement tries to include ABS,far light,air sac,hand system to move,turn left,turn right,break down,trouble,hydraulic-pneumatic,refresh,make to move a liquid and cool off a liquid,baggage box,ex- round,left and ex- door,right and ex- door,left back door,right back door etc..Imitate a measurement to try is pass the calculator plank PC-7483 card of the D/A send out the electric voltage signal(0-10v) outwardly, delivering to the oil watch and the water temperature form to carry on a test after enlarge the electric circuit through a class.The numerical measurement try also is send out signal through an I/O, try with the switch measurement different is this signal is square wave signal, the signal can be changed its frequency by the calculator, making the gauge show different number.The numerical measurement tries to include to turn soon with car soon two items.The numerical measurement try also is send out variable square wave of frequency signal through an I/O, make the gauge show different number, include to turn soon with car soon two items.3, The system application procedureThe system measures to control the software adopt C++Builder language mold piece turn the structure development tool to carry on write.The data collects card to drive procedure is driven the procedure development tool Windriver by the appropriation plank card to carry on write.The system test software mainly includes an oil temperature to spread the feeling machine test mold piece and turns to spread the feeling machine test mold piece,instrument panel test mold piece and light the fire item a turn a test the mold piece soon etc..Start test the forerunner go into main interface, needing to be test a certain enter one, start test after the mold's piece win carry on enactment.4, Experiment result and evaluationThis test system has already circulated half year normally in the quality department of the FAW Car Co., Ltd..Pass the product of this system to engine the machine electricity to control the system component to complete a series verification experiment.Provided certain data assurance to the selection work of the electronics component for that company.The fulfillment proves that system function is good, stability credibility, the data is accurate, coming to an a design an usage a request completely, obtaining good on trial result, acquiring good opinion.So that test is the testing machine to develop success.it is not only satisfy an actual need, but also engine the machine electricity to control the system component to test a technical development to do contribution for the our country..