The Research Of Test Bench For Throttle Angle Sensor In Vehicle

With the rapid development of electronic technology, automotive electronics degree of continuous improvement,the usual mechanical system has been difficult to resolve certain issues related to vehicle functions requires,replaced by the electronic control system. Sensors as a key component of automotive electronic control system,which directly affect the technical performance of the car to work.The angle sensor is widely used in the car,mainly for the detection of crank angle,engine speed,vehicle seed,accuracy and reliability of the vehicle control plays a vital role. Therefore, the angle sensor performance requirements have become more sophisticated, hence the detection means of the angle sensor performance requirements have been increased too. It must operate simple, can accurately reflectthe true characteristics of the sensor, and meet the industrial production conditions. But now, means of detection is often difficult to reach the needs of existing industrial production, which is the purpose for the development of the subject.Designed test rig in passage is aim at detection of automotive throttle angle sensor performance.Throttle angle sensor is installed in the throttle shaft to checking the sensors’throttle opening degree sensor, the role of the throttle angle sensor is turn the position of the throttle opening into the voltage signal transmitted to the electronic control unit, as the basis of the engine operating conditions which the electronic control unit to determine to achieve different throttle fuel injection quantity control. All of the opening angle of the analog signal of the continuous changes, as well as the throttle opening rate of change are available by electronic control units through the throttle angle sensor to said throttle from fully closed to fully open.So electronic control units can determine the engine operating conditions more accurately,improve the control accuracy and effect. The project is for a non-contact Hall-effect throttle angle sensor detection, which consists of three parts:the mechanical structure design of the detection system, the PLC program design and developmentand VB host computer test software, as well as both communication and control.This paper first introduces the characteristics of the throttle angle sensor and its working principle and the existing sensor detection means which we need to detect. Then according to the shape of the sensor and customer needs relates to bench designs, including the entire mechanical system design and control system design. Second, it have a selection of relevant hardware and connections, the preparation of the PLC program and debugging. The last,it completes a application written in VB to test the operating software of the host computer, makes PLC communications and control and data acquisition and processing come tue.The system has been completed successfully and put into production. At the same time,it can meet the industrial demand.For its simple operation, clear display screen, image of real-time data acquisition and the discrimination of sensor’ eligibility, the new design method to characteristics sensor detection is in great practical significance.