基于WIFI的动车组电气元件松动虚接在线检测装置设计

Design of CRH Electrical Components Loose Testing Device Based on WIFI

针对高速动车存在的元件松动虚接问题,本文以ST公司的32位微控制器STM32F103和ADI公司的16位高精度AD转换器AD7606为核心,对动车组马达启动器及接触器的电气参数进行实时在线检测和故障诊断,同时将测量数据通过无线网络(wireless fidelity,WIFI)上传至服务器,并通过触摸屏实现人机交互。实验结果表明,随着动车行驶里程的增加,接触电阻会逐渐增大,触点温升会升高,当到达温升上限之后装置报警,并将数据远传到服务器。该装置设计成本低,操作简单、组网方便,其可靠性、实时性和精准性较高,具有较大的推广和应用价值。

This paper introduces a design scheme which is used to detect the CRH motor starter and contact element loose based on WIFI.This scheme uses 32-bit STM32F103 MCU and 16-bit AD7606 with dual polarity as the core controller,and the intelligent acquisition instrument can measure the parameters variation of the EMU motor starter and contactor＇s contact,it also can be in real-time online testing and fault diagnosis.The data through the WIFI upload to the server and to achieve human-computer interaction via the touch screen.The loading experiment proved,with EMU mileage increase,the contact temperature will rise,and when the temperature reaches the upper limit,the device alarms and sends data to the server.So this design is high reliable,real-time,precise and low cost so that it has a higher application value.