Research Of Solenoid Valve VE3 Test System

As an actuator automatic instrument, the solenoid valve is simple, safe, reliable and small power, it has been widely used in locomotive, automobile, engineering machinery and agricultural machinery and many other aspects at home and abroad. The HXD2 electric locomotive braking system has used a lot of different types of solenoid valves, which make the braking system fast response and precise control. There is a type of solenoid valve named VE3, it has simple structure, reliable performance, and can be easily controlled, whether the VE3 solenoid valve is reliable and stable in quality and performance will be directly related to the correct implementation of the brake, which is important for the Datong-Qinhuangdao line of heavy transport safety.Solenoid valve VE3, one of the products in sifang brake Ltd Faiveley, is used as research object in this paper. Firstly, the structure and working principle of solenoid valve VE3 is introduced, according to relevant standards, solenoid valve testing system pneumatic diagram is designed, according to the testing projects and specific contents, the test system flowcharts is designed.Secondly, the test system hardware structure is designed, the required component of the system hardware is selected in reason, making them satisfy the test system requirements. the test of software system structure is designed, testing system is used programming language Visual Basic 6.0 as development environment, and is adopted modular programming environment, through analyzed the system structure, and the test software is divided into sensor calibration module, parameter Settings module, data acquisition and processing module, data display and control module, and data management module, the control interface of the test system is designed, and the sensor calibration, data acquisition and processing system realization and data management is illustrated.Finally, the paper analyzes the causes of system error the mechanism of interference, and the test system adopts the grounding and shielding, double end of the measured signal input, digital filter technology to inhibit system interference.