基于MEMS传感器的无线振动测量节点设计

Design of Wireless Vibration Measurement Node Based on MEMS Sensor

针对机械设备有线振动监测系统存在监测盲区、部署成本高等不足,现有无线振动节点存在的高频率振动信号拾取困难、通信速率低、硬件性能差等问题进行了应用研究。基于射频和嵌入式技术,采用精密MEMS传感器,设计了基于STM32微控制器的高精度数据采集、无线射频通信、大容量存储及电源调理等硬件电路,并根据测量频率范围设计了2类不同通信速率的振动节点,实现了节点的无线组网通信、TPSN时间同步等软件设计,研制适合机械设备振动监测应用的无线振动测量节点。最后搭建振动对比校准实验台对该节点进行参数标定,经实测节点具有较高测量灵敏度和精度,具有一定应用参考价值。

For mechanical equipment cable vibration monitoring system exists a blind spot monitoring, and deployment cost is high, existing wireless vibration node in the presence of high frequency vibration signal is difficult in picking up and communi- cation speed is low, hardware performance is poor, based on RFID and embedded technolo~, precision MEMS sensor was de- signed based on STM32 micro controller of high precision data acquisition, wireless radio frequency communication, large capaci- ty storage and power conditioning and other hardware circuit. And according to the measured frequency range, two different com- munication rate vibration nodes were designed, realizing the software design of wireless network communication, TPSN time syn- chronization and so on. A wireless vibration measurement node which was suitable for vibration monitoring of mechanical equip- ment was developed. Finally, the calibration experiment table was used to calibrate the parameters of this node, which had high sensitivity and precision, and it had certain application reference value.