基于Sagnac振动传感器的扫频定位

萨格纳克(Sagnac)传感器可用于监测围栏、管道、输电线路等振动信号.通过Sagnac振动传感器定位的原理,提出了采用函数信号发生器驱动压电陶瓷来模拟宽频入侵振动信号,从而确定系统定位的精度方法.对获得的信号小波降噪,并根据降噪后的信号进行快速傅里叶变换,再根据频谱寻找零频点对振动点定位,信号的解调程序采用Lab VIEW软件进行编写.实验证明,该方法能够很好地确定系统的定位精度.

Frequency Sweep Positioning of Sagnac Vibrating Sensor Technique

The Sagnac sensor can be used to measure the vibration signals in fence,pipeline, transmission line. The positioning principle of the sensor was introduced, a accuracy positioning method which using function signal generator to drive the piezoelectric ceramic and to simulate an vibratory signal of a wide frequency was put forward, the method of wavelet de-noise was used to process the collection signals, de- noised signals were analyzed by fast Fourier transform, then zero frequency point was searched according to the frequency spectrum to position the vibration point. Signal demodulation program was written by LabVIEW software. The experiment result shows that the method can well determine the positioning accuracy of the system.