基于弹性薄壁管的光纤光栅高频加速度检波器  

FBG Micro-Seismic Sensor with High Resonant Frequency Based on Elastic Light-Walls Tube

作　　者：禹大宽[1,2] 刘钦朋[1] 高宏[1] 贾振安[1] 乔学光[1,2] YU Da-kuan LIU Qin-peng GAO Hong JIA Zhen-an QIAO Xue-guang(Key Laboratory on Photoelectric Oil-Gas Logging and Detecting , Ministry of Education, School of Science, Xi＇an Shiyou University, Xi＇an 710065,China Shanxi Key Laboratory of Optical Information Technology, School of Science, Northwestern Polytechnical University, Xi＇an 710072,China)

机构地区：[1]西安石油大学理学院,光电油气测井与检测教育部重点实验室,西安710065 [2]西北工业大学理学院,陕西省光信息技术重点实验室,西安710072

出　　处：《光通信研究》2016年第3期50-52,共3页Study on Optical Communications

基　　金：国家“八六三”计划资助项目(2009AA06Z203);陕西省自然科学基金资助项目(2016JM6055);中石油天然气集团公司资助项目(2014B-4012,2014A-3609);陕西省教育厅资助项目(13JS088,12JK0533,08JZ58)

摘　　要：针对非常规油气开采微地震监测检波器高频检测的要求,提出了一种基于弹性薄壁管的FBG（光纤布拉格光栅）高频微地震检波器,理论分析了该检波器的实验模型,并对检波器的幅频特性和加速度灵敏度进行了实验研究。实验结果表明：基于弹性薄壁管的FBG高频微地震检波器的固有频率为1 680 Hz;在50~1 200 Hz工作频率范围内,加速度与波长有很好的线性关系,线性拟合度为0.998 4,加速度响应灵敏度为4.393 2 pm/G,实验值与理论值的相对误差为0.15%。In non-conventional oil and gas exploitation field, micro-seismic monitoring technology requireshigh resonant frequency micro-seismic sensor. In this paper, a Fiber Bragg Grating（FBG） micro-seismic geophone with high resonant frequency based on elastic light-walls tube is proposed. The mechanical model, the amplitude-frequency and the sensitivity of the geophone are theoretically analyzed and experimentally measured. Experimental results show that the resonant frequency is 1 680 Hz. In the operating range of 50 - 1 200 Hz, the linear fitting degree is 0. 998 4 and the acceleration sensitivity is 4. 393 2 pm/G. The relative error is 0.15% between the experimental result and theoretical analysis.

关 键 词：光纤光学 光纤布拉格光栅 微地震检波器 灵敏度 

分 类 号：TP212.14[自动化与计算机技术—检测技术与自动化装置]