Aiming at the problem of frequent test and maintenance on gap sensor of Maglev train,using wireless communication technology,virtual instrument technology,digtal signal processing technology,a test system based on WiFi communication was designed,Wireless communication was realized by adding a WiFi module to the gap sensor in this system.PC with WiFi communication function was adopted as monitoring terminal and the man-machine interface was programed by LabVIEW.The test result shows that the system is stable,reliable and easy to handle.The system can realize the wireless test,storage,analysis and non-linear correction on gap sensor.The linearity of the calibrated gap sensor can meet the requirement of the suspension control system and it can be used in the closed-loop control of the suspension control system.%针对磁浮车间隙传感器工作环境恶劣需要频繁地测试与维护的问题,应用无线通讯技术、虚拟仪器技术、数字信号处理技术,设计了一种基于WiFi通讯的磁浮车间隙传感器测试系统,该系统在原有磁浮车间隙传感器的基础上增加WiFi模块使传感器具有无线通讯功能,采用具有WiFi通讯功能的便携式PC机作为系统的监控终端,利用图形化编程语言LabVIEW编写监控终端的人机交互界面;测试结果表明:该系统工作稳定可靠、操作简便,实现了对间隙传感器特性的无线测试、存储、分析和非线性校正,非线性校正后的间隙传感器具有良好的线性特性,其输入输出特性达到了磁浮车悬浮控制系统的要求,可用于悬浮控制系统的闭环控制.
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