用于地震信号检测的分布式光纤声学传感系统设计  

Design of distributed optical fiber acoustic sensing system for seismic signal detection

作　　者：高新雨 衣文索 陈刚[1] 巩楠楠 林家锴 GAO Xinyu;YI Wensuo;CHEN Gang;GONG Nannan;LIN Jiakai(School of Optoelectronic Engineering,Changchun University of Science and Technology,Changchun 130022,China)

机构地区：[1]长春理工大学光电与工程学院,长春130022

出　　处：《光通信技术》2021年第12期14-16,共3页Optical Communication Technology

摘　　要：为了解决传统电磁式检波器只能点式测量且工程化成本高的问题,提出了一种分布式光纤声学传感系统。首先设计了系统的光学结构,然后设计了重点模块PIN型光电探测器,最后使用24芯铠装光缆对50~500 Hz范围内的单次振动信号进行了4组频率测试实验。实验结果表明:该分布式光纤声学传感系统对可控震源产生的振动信号检测效果良好,可以实现对振动源的精准定位与频率检测。In order to solve the problem of traditional electromagnetic geophone which can only be measured in point and high engineering cost,a distributed optical fiber acoustic sensing system is proposed.Firstly,the optical structure of the system is designed,then the key module PIN photodetector is designed.Finally,the single vibration signal in the range of 50~500 Hz is tested by using 24-core armored optical cable in four groups of frequency tests.The experimental results show that the distributed optical fiber acoustic sensing system has a good detection effect on vibration signals generated by vibroseis,and can realize the precise positioning and frequency detection of vibration sources.

关 键 词：光纤传感 地震信号 解调算法 震源定位 

分 类 号：TN247[电子电信—物理电子学]