Automatic measurement system for comprehensive performance of gas brake valve based on virtual instrument

Working principle of gas brake valve and performance testing methods of tightness, static and dynamic characteristics are introduced. Several characteristic parameters, such as initial pressure differential and dynamic response time, are blended into testing methods. An automatic measurement system of the gas brake valve based on virtual instrument is developed, and realizes double-position independent inspection of one set of PC control system, improving test efficiency. It is designed by using Labview, one of graphical programming software. Combining with data acquisition and servo movement module, this system can realize the tightness, static characteristic and dynamic characteristic parameters testing of gas brake valve. The results show that this system can effectively detect the gas brake valve for on-line measuring, testing time for 120s, simple operation, and satisfying the requirements of dynamic testing process.