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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。
In view of the single chip microcomputer measurement method to measure the resonant frequency of the vibrating wire sensor has the advantages of strong anti-interference ability, low power consumption, high signal acquisition accuracy, the use of single-chip central processing unit, the collector pulse excitation method, vibrating wire sensor resonance, The resonant signal is then input to the microcontroller via an amplifier and a filter, processed by the microcontroller, and converted into a digital signal, which is then applied to the dam of the Tao River in Wuhan. The results show that the system not only improves the anti-interference ability of the whole system, but also has strong adaptability, high reliability and is easy to install and embed.