基于LabVIEW的电磁阀动态响应特性测试系统

Test System of Dynamic Response Characteristic of Solenoid Valve Based on LabVIEW

基于LabVIEW虚拟仪器和第三方测控板卡,配合机电耦合测试平台,设计开发了耐压范围0.1~35MPa的电磁阀动态响应特性测试系统。详细介绍了气动回路、电气控制回路以及测控软件系统。利用LabVIEW中的Queue技术简化了数据采集、显示与储存的编程。采用巴特沃思滤波器对高速采集到的传感器数据进行了滤波,并采用最小二乘拟合法对压力测试值进行了修正,提高了测试系统的测量精度。软件测试系统采用模块化的编程思想,具有二次开发功能。实际使用结果表明,该系统能够同时检测4只被试阀,工作效率提高了400%左右,测试精度达到了0.5%。

Based on LabVIEW for virtual instruments and a third-party measuring board and controlling card,support by the electromechanical coupling test platform,the dynamic response characteristic of solenoid valve test system was designed and developed,which pressure resistance value from 0.1MPa to 35MPa.Its pneumatic circuit,electrical control circuit and controlling software system are also presented.By use of Queue technology,the programming for data acquisition,storage and display was simplified.In order to improve the measure precision of testing system,using Butterworth filter to filter the high-speed sensor data collected,and adopting the method of least square fitting to modify the measurement signal of pressure.The system adopts the idea of modularization,and has an ability of redevelopment.The experiment shows that this system can test four solenoid valves simultaneously,the working efficiency has enhance about 400%,the testing precision has reached up to 0.5%.