高精度钻孔温度仪及井下集成技术研究

doi:10.12196/j.issn.1000-3274.2022.02.005

地震 ›› 2022, Vol. 42 ›› Issue (2): 63-73.doi: 10.12196/j.issn.1000-3274.2022.02.005

高精度钻孔温度仪及井下集成技术研究

张兵¹, 朱小毅¹, 张晓峰², 李江¹, 陈全胜³, 薛兵¹, 黄诗¹, 吴旭¹

1.中国地震局地震预测研究所, 北京 100036;
2.中国科学院微小卫星创新研究院, 上海 201203;
3.北京港震科技股份有限公司, 北京 102628

收稿日期:2022-02-22 修回日期:2022-03-25 出版日期:2022-04-30 发布日期:2023-02-17
通讯作者: 朱小毅, 研究员。 E-mail: zxy_bj2008@126.com
作者简介:张兵(1983-), 男, 山东曲阜人, 副研究员, 主要从事地震仪器设备研发研究。
基金资助:
中央级公益性科研院所基本科研业务费专项(CEAIEF2022030105); 中国地震科学实验场专项深井和地球化学观测任务项目(510226401); 国家重点研发课题项目(2018YFC1503904)

Research on High-Precision Borehole Thermometer and Downhole Integration Technology

ZHANG Bing¹, ZHU Xiao-yi¹, ZHANG Xiao-feng², LI Jiang¹, CHEN Quan-sheng³, XUE Bing¹, HUANG Shi¹, WU Xu¹

1. Institute of Earthquake Forecasting, CEA, Beijing 100036, China;
2. Innovation Academy for Microsatellites of the CAS, Shanghai 201203, China;
3. Beijing Gangzhen Technology Co., Ltd., Beijing 102628, China

Received:2022-02-22 Revised:2022-03-25 Online:2022-04-30 Published:2023-02-17

摘要/Abstract

摘要： 为了克服连接导线的热电偶效应和测量电路零点漂移的影响, 本文基于DFT变换的信号提取技术, 在铂电阻测温电桥中应用交流驱动, 设计了高精度钻孔温度仪, 以及钻孔温度观测的集成方案和实验方案。实验室测试表明, ≥0.5 mHz频带的温度测量噪声水平优于0.03 mK/Hz^1/2。应用于中国地震科学实验场长期观测结果显示, 该高精度钻孔温度仪运行稳定, 数据完整, 为实验场地震模型的检验和地震前兆异常的判断提供了观测手段和数据支撑。

关键词: 高精度钻孔温度仪, 井下集成观测, 地震科学实验场

Abstract: In order to overcome the thermocouple effect of the connecting wire and the influence of the zero drift of the measurement circuit, a high-precision borehole thermometer, as well as the borehole temperature observational integration and experimental scheme were designed based on the signal extraction technology of DFT transformation. The AC drive was applied into the platinum resistance thermometer bridge. Laboratory tests show that the power spectral density of temperature noise is less than 0.03 mK/Hz^1/2 in the frequency band ≥0.5 mHz. Long-term observations of the China seismic experimental site show that the high-precision borehole thermometer runs stably and has complete data, so as to provide observation means and data support for the experimental site seismic model verification and earthquake precursory anomalies.

Key words: High-precision borehole thermometer, Downhole integrated observation, The China seismic experimental site

中图分类号:

P315.6

张兵, 朱小毅, 张晓峰, 李江, 陈全胜, 薛兵, 黄诗, 吴旭. 高精度钻孔温度仪及井下集成技术研究[J]. 地震, 2022, 42(2): 63-73.

ZHANG Bing, ZHU Xiao-yi, ZHANG Xiao-feng, LI Jiang, CHEN Quan-sheng, XUE Bing, HUANG Shi, WU Xu. Research on High-Precision Borehole Thermometer and Downhole Integration Technology[J]. EARTHQUAKE, 2022, 42(2): 63-73.

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高精度钻孔温度仪及井下集成技术研究

Research on High-Precision Borehole Thermometer and Downhole Integration Technology

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