为了对山体表层土壤位移监测,采用三轴加速度传感器MMA8452和Zig Bee无线网络设计实现无线滑坡位移监测系统。设计采用CC2530实现Zig Bee网络,Zig Bee各终端设备(End-Device)所测得的加速度信号发送到协调器(Coordinator),数据再由协调器送至PC端进行数据分析和处理,将加速度数据转换为位移,从而实现对滑坡位移的检测。实验结果表明该系统对位移的检测误差小于2%,可以很好的完成位移的监测,并且能够通过预设阀值的方法对山体滑坡等自然灾害进行预警。
In order to detect the displacement of the surface soil, the three-axis accelerometer of MMA8452 and wireless network of Zigbee were designed to realize the system of wireless landslide displacement monitoring. The Zigbee network is implemented by cc2530, terminal equipment of Zigbee (End-Device) send acceleration signal to coordinator (Coordinator),and coordinator send data to PC to analyze and process, then the acceleration data will be converted to the data of displacement, it will realize the detection of landslide displacement. The result shows that the error in measuring displacement is less than 2% , and it can be very good to complete the monitoring of displacement, it also can warn the natural disaster of landslide early through the method of threshold value.