流动宽频带地震计自噪声测试研究

doi:10.3969/j.issn.0253-4967.2013.03.011

地震地质 ›› 2013, Vol. 35 ›› Issue (3): 576-583.DOI: 10.3969/j.issn.0253-4967.2013.03.011

流动宽频带地震计自噪声测试研究

尹昕忠, 陈九辉, 李顺成, 郭飚

中国地震局地质研究所, 地震动力学国家重点实验室, 北京 100029

收稿日期:2012-08-12 修回日期:2013-07-04 出版日期:2013-09-30 发布日期:2013-10-12
通讯作者: 陈九辉,研究员,电话:010-62009059,E-mail:chenjh@ies.ac.cn
作者简介:尹昕忠,男,1983年生,2010年毕业于中国地质大学(北京)地球探测与信息技术专业,助理工程师,主要从事宽频带流动地震台阵观测技术研究,电话:010-62009153,E-mail:yinxinzhong@ies.ac.cn。
基金资助:
中国地震局地质研究所基本科研业务专项(IGCEA1110)和中国地震局地震行业科研专项(201008001)共同资助。

THE RESEARCH ON SELF-NOISE MEASUREMENT METHOD OF MOVEABLE BROADBAND SEISMOMETER

YIN Xin-zhong, CHEN Jiu-hui, LI Shun-cheng, GUO Biao

State Key Laboratory of Earthquake Dynamics, Institute of Geology, China Earthquake Administration, Beijing 100029, China

Received:2012-08-12 Revised:2013-07-04 Online:2013-09-30 Published:2013-10-12

摘要/Abstract

摘要：

分别采用双台地震计自噪声互相关分析法(以下简称 "Holcomb双台法")和3台地震计自噪声互相关分析法(以下简称 "Sleeman多台法")对 CMG-3T、BBVS-120、STS-2型流动宽频带地震计进行自噪声测试研究。结果表明: Sleeman多台法因有效地规避了传递函数引起的误差,在处理流动宽频带地震计实际记录数据方面比Holcomb双台法更能有效地滤除背景噪声; 在简单测试条件下,3种常用流动地震计的自噪声在0.06～1Hz频带内均低于NLNM曲线,显示了相当好的噪声性能指标; 在流动台阵观测过程中,地震计方位准确性以及地震计的保温防护措施是保证发挥仪器性能的重要因素。

关键词: 自噪声, 互相关, 流动宽频带地震计, 方位一致性

Abstract:

This article uses two-sensor coherence analysis method(Holcomb,1989)and three-sensor coherence analysis method(Sleeman,2006)to calculate the self-noise models for CMG-3T,BBVS-120 and STS-2 seismometers. The results show that: 1)Sleeman's method can avoid the error caused by the transfer function in calculation and can extract more potentially and efficiently the background noise than the Holcomb's method does; 2)Under our simple test condition,the self-noise of the three sensors in 0.06～1Hz band is lower than NLNM,which represents a quite good noise performance; 3)In the observation process of movable seismic array,the sensor alignment and sensor insulation protective measure are important factors to guarantee a good performance of the instruments.

Key words: movable broadband sensor, self-noise, coherence analysis, sensor alignment

中图分类号:

P315.61

尹昕忠, 陈九辉, 李顺成, 郭飚. 流动宽频带地震计自噪声测试研究[J]. 地震地质, 2013, 35(3): 576-583.

YIN Xin-zhong, CHEN Jiu-hui, LI Shun-cheng, GUO Biao. THE RESEARCH ON SELF-NOISE MEASUREMENT METHOD OF MOVEABLE BROADBAND SEISMOMETER[J]. SEISMOLOGY AND GEOLOGY, 2013, 35(3): 576-583.

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流动宽频带地震计自噪声测试研究

THE RESEARCH ON SELF-NOISE MEASUREMENT METHOD OF MOVEABLE BROADBAND SEISMOMETER

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