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地球科学进展  2019, Vol. 34 Issue (4): 424-432    DOI: 10.11867/j.issn.1001-8166.2019.04.0424
地球化学     
基于光纤传感的多参量地震综合观测技术研究
黄稳柱1,2(),张文涛1,2,李芳1,2
1. 中国科学院半导体研究所传感技术国家重点实验室,北京 100083
2. 中国科学院大学材料科学与光电子技术学院,北京 100049
Study on Multi-Parameter Seismic Observation Technique Based on Optic Fiber Sensing
Wenzhu Huang1,2(),Wentao Zhang1,2,Fang Li1,2
1. State Key Laboratory of Transducer Technology, Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083, China
2. College of Materials Science and Opto-Electronic Technology, University of Chinese Academy of Sciences, Beijing 100049, China
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摘要:

面向地震综合观测需要,自主研制了窄线宽光纤光栅谐振腔,并将其作为核心传感元件,发展了一种基于有效腔长的光纤应变、地震波和温度多参量同步测量新方法。采用边带扫频激光技术实现了高精度多参量光纤信号同步解调,研制出了光纤地壳形变、地震与温度多参量探头,并开展了多参量地震综合观测实验。实验结果表明,所研制的光纤多参量传感系统应变与温度测量分辨率分别达到4.7×10-10和6 × 10-5 ℃,能够同时记录到清晰的固体潮汐信号、地震波信号以及环境温度扰动,有望为多参量地震同步观测提供先进的技术手段。

关键词: 光纤传感地壳形变地震波温度多参量综合观测    
Abstract:

”Deep well, wide band, multi-component comprehensive observation” is the development direction of seismic observation. In order to promote the application and development of underground integrated observation system, key technologies, such as high temperature resistance sensor, interference isolation of sensor unit and miniaturization of instrument, need to be developed. Optic fiber sensors have the advantages of small size, passive nature, resistance to electromagnetic interference, being easy to long distance transmission and multi-parametric network observation, which are expected to provide new technology for the comprehensive observation of multi-parameter earthquakes in deep wells. This paper proposed a comprehensive observation technique of seismic wave, crustal deformation and temperature. An integrated borehole seismic sensor based on fiber Bragg grating resonators was designed for measuring three-component earthquake, three-component crustal deformation and temperature signal. A new technique for simultaneous measurement of multi-parameters of temperature and strain of fiber based on effective cavity length was presented. The technique of high precision optical fiber signal demodulation based on single side band sweep laser and the design of multi-parameter integrated optical fiber probe were introduced. The resolution of strain and temperature measurement of the fiber multi-parameter sensor system reached 4.7 × 10-10 and 6×10-5 , respectively. A comprehensive multi-parameter earthquake observation experiment was carried out at the seismic station. The results show that the integrated optical fiber multi-parameter seismic observation system can simultaneously record the earth tide signal, seismic wave signal and environmental temperature disturbance, and has good anti-environmental interference ability and long-term stability, which is expected to provide a new technique for crustal deformation observation.

Key words: Optic fiber sensing    Crustal deformation    Seismic wave    Temperature    Multi-parameter observation.
收稿日期: 2018-11-05 出版日期: 2019-05-27
ZTFLH:  P315.73  
基金资助: 国家重点研发计划项目“先进光纤传感材料与器件关键技术及应用”(编号:2017YFB0405500);国家自然科学基金项目“基于频率分裂与偏振效应的超高分辨率光纤光栅静态应变检测关键技术研究”(编号:61605196)
作者简介: 黄稳柱(1987-),男,江西九江人,博士研究生,主要从事光纤传感技术研究.E-mail:hwzhu@semi.ac.cn
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引用本文:

黄稳柱,张文涛,李芳. 基于光纤传感的多参量地震综合观测技术研究[J]. 地球科学进展, 2019, 34(4): 424-432.

Wenzhu Huang,Wentao Zhang,Fang Li. Study on Multi-Parameter Seismic Observation Technique Based on Optic Fiber Sensing. Advances in Earth Science, 2019, 34(4): 424-432.

链接本文:

http://www.adearth.ac.cn/CN/10.11867/j.issn.1001-8166.2019.04.0424        http://www.adearth.ac.cn/CN/Y2019/V34/I4/424

图1  光纤光栅谐振腔结构原理(a)、反射光谱(b)以及一个自由谱范围内的谐振峰图(c)
图2  高精度光纤光栅多参量信号解调技术方案
图3  应变传感光栅、温度传感光栅的时域本底噪声以及应变光栅温度补偿后的时域本底噪声
图4  光纤多参量地震综合观测探头结构原理(a)与实物图(b)
图5  光纤光栅谐振腔地震计结构示意图
图6  光纤光栅形变传感器固体潮和地震观测实验方案
图7  三分量光纤形变传感器记录到的固体潮信号与地震事件
图8  三分量光纤地震计记录到的印尼龙目岛6.5级地震信号
图9  光纤温度传感器记录到的温度变化曲线
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