光栅谐振子检测地震波的理论和方法研究

Study on the Method and Theory of Seismic Survey with Grating Vibrator

提出了一种新的检波理论和方法 ,它是一种实现检测地震波信号的地震勘探技术。采用光栅谐振子为敏感元件 ,将大地震动的机械信号转换成光调制信号—莫尔条纹 ,再用光电接收器件将其转换成数字化电信号输出。光栅谐振子检测地震波的装置能够直接将大地震动的机械信号转化为脉冲数字信号输出 ;并以记数的形式采样 ,避免了器件的精度不同对传感器输出的数据质量的影响 ,从而简化了组装工艺。文中阐述了该方法的工作原理、参数计算。

A new method and theory about seismic survey is presented . It is a new seismic exploration technology to detect seismic waves. As a sensory unit, grating vibrator translates mechanical vibration of seism into photo-modulating signal, called Moiré fringe, which is converted into digital electronic signal by photoelectric parts after them. Due to the direct digital output of geophone by the pulse style and sampling by pulse counting, the impact area to deferent data, coming from the different accuracy of devices, is turned away. And so the packaging technology is simplified. The working principle, parameter arithmetic, tested measurement, experimental result are given.