基于振弦式传感器的大坝变形检测系统及应用

Detection System of Dam Deformation Based on Vibration Wire Sensor and Its Application

鉴于单片机测量法测量振弦式传感器共振频率具有抗干扰能力强、功耗低、信号采集精度高等优点,利用单片机做中央处理单元,采集器采用脉冲激励的方法,使振弦式传感器产生共振,再将共振信号经放大器和滤波器输入到单片机,由单片机处理后转换成数字信号,并将其应用于武汉市道观河水库溢洪坝内。结果表明,该系统不仅提高了整个系统的抗干扰能力,且适应性强、可靠性高、便于安装和埋设。

The detection of resonance frequency of vibration wire sensor with chip microcomputer has some advanta ges, such as strong anti-interference capability, low power consumption and high precision of data acquisition. The chip microcomputer is used as central processing unit and incentive pulse method is applied to collector, which makes vibration wire sensor appear resonance. And the resonance signal is transmitted to the chip microcomputer by amplifier and filter. Then, the signal is converted to the digital signal. Finally, the detection system is applied to overflow dam of Daoguanhe reservoir in Wuhan City. The results show that the detection system improves anti-interference capability with strong applicability, high reliability and installation easily.