基于光学干涉原理的光纤地震数据采集系统  

Fiber Optic Seismic Data Acquisition System Based on Optical Interference

作　　者：李勤[1] 刘超[1] 张健博 李文韬 LI Qin;LIU Chao;ZHANG Jianbo;LI Wentao(No.3 Research Institute of China Electronics Technology Group Corporation,Beijing 100015,China)

机构地区：[1]中国电子科技集团公司第三研究所,北京100015

出　　处：《电声技术》2021年第8期71-74,80,共5页Audio Engineering

基　　金：国家重点研发计划项目(No.2018YFF 01013500)。

摘　　要：提出一种基于光学干涉原理的光纤地震数据采集系统,对震源激发、经地层发射后的地震信号实现敏感、提取及存储等功能。光纤地震数据采集系统由光纤采集链、光纤主缆、光纤解调器以及地震记录仪组成,基于光学干涉的物理原理来拾取地震信息。当震源激发的震动经地层反射后传导到光纤采集链上携带的检波器时,光纤中传输光波的相位受到调制。系统对干涉光波进行光电转换和信号处理,提取出光波相位中包含的地震信息,并对地震数据进行记录。光纤地震数据采集系统可以解决传统地震数据采集系统存在的供电困难、易受电磁干扰、数据传输慢等问题。In this paper,the fiber optic seismic data acquisition system based on optical interference is proposed.The system can be sensitive to the seismic signal excited by the source and transmitted by the stratum,then the raw data is extracted and recorded.The fiber optic seismic data acquisition system consists of optical fiber acquisition link,main optical cable,optical fiber demodulator and seismic recorder.The system picks up seismic information based on physical principle of optical interference.When the vibration excited by the source is reflected by the stratum and transmitted to the sensor carried on the optical fiber acquisition link,the phase of the lightwave transmitted in the fiber is modulated.The seismic information is extracted through photoelectric conversion and signal processing,then the seismic data is recorded.The fiber optic seismic data acquisition system can solve the problems of traditional seismic data acquisition system such as power supply difficulty,susceptibility to electromagnetic interference,and slow data transmission.

关 键 词：光学干涉 地震数据采集 光纤采集链 光纤解调器 

分 类 号：TP212[自动化与计算机技术—检测技术与自动化装置]