激光多普勒效应在地震波勘探中的应用研究  

Research on Seismic Acquisition Technique Utilizing Laser Doppler Effect

作　　者：杜振辉[1] 陶知非[2] 蒋诚志[1] 谢艳[3] 吕丽娜[1] 黄福祥[1] 

机构地区：[1]天津大学精密测试技术及仪器国家重点实验室,天津300072 [2]石油地球物理勘探局,涿洲072751 [3]天津大学机械学院,天津300072

出　　处：《光电子．激光》2004年第8期955-958,共4页Journal of Optoelectronics·Laser

基　　金：国家自然科学基金资助项目(40274046)

摘　　要：传统地震检波器为"永磁 动圈"式电磁检波器,在信号捡取过程中易受电磁干扰,存在非线性;基带传输的低频模拟信号(10～300Hz)会受干扰。提出一种应用切向激光多普勒技术的地震波检测方法,采用优化设计的差动光路结构方案,研究了信号处理单元的适宜带宽。通过F/V转换可以实时地得到被测速度、位移、加速度和频率。实现了线性测量的频率范围1.0～1000Hz,动态范围100dB。A new method of seismic acquisition, which uses tangential laser Doppler effect with an optimized differential optical configuration, was proposed. The frequency bandwidth was properly determined by analyzing the frequency of the Doppler signal. The velocity, displacement, acceleration and frequency can be acquired in real-time by F/V converting the FM Doppler signal. A dynamic range of 100 dB and the linear frequency range of 1.0 to 1000 Hz are realized.

关 键 词：基带传输 线性测量 动态范围 低频 模拟信号 带宽 频率范围 地震波 地震检波器 勘探 

分 类 号：TN912[电子电信—通信与信息系统] P631[电子电信—信息与通信工程]