[1]李剑,贺铭,韩焱,等.浅层震源定位中高精度时间差测量方法[J].探测与控制学报,2020,42(02):45.[doi:.]
 LI Jian,HE Ming,HAN Yan,et al.A High Precision Shallow Microseismic Time Difference Measurement Method[J].,2020,42(02):45.[doi:.]
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浅层震源定位中高精度时间差测量方法()
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《探测与控制学报》[ISSN:1008-1194/CN:61-1316/TJ]

卷:
42
期数:
2020年02
页码:
45
栏目:
出版日期:
2020-04-15

文章信息/Info

Title:
A High Precision Shallow Microseismic Time Difference Measurement Method
文章编号:
1008-1194(2020)02-0045-07
作者:
李剑1贺铭1韩焱1雍顺宁2
1.中北大学信息探测与处理山西省重点实验室,山西 太原 030051 ;2.中国兵器工业试验测试研究院,陕西 华阴 714200
Author(s):
LI Jian1 HE Ming1 HAN Yan1 YONG Shunning2
1.Institute of Signal Capture & Processing Technology, North University Of China, Taiyuan 030051, China; 2.China Ordnance Industry Test and Testing Institute, Huayin 714200, China
关键词:
时间差分布式震源定位初至波到时
Keywords:
time difference distributed source location first arrival time
分类号:
TN911.72
DOI:
.
文献标志码:
A
摘要:
针对爆炸近场群波混叠严重,造成时间差提取精度低,震源定位精度不高的问题,提出了浅层震源定位中高精度时间差测量方法。该方法利用爆炸波宽频谱的特性,在时频域内确定震动场直达P波优势频率,利用该频率成分通过互相关和谱分解算法提取节点间相应的相位差信息,结合初至波到时和传感器自身的相频特性,去除相位模糊,最终将相位差转换为时间差。数值仿真和试验验证表明,与基于初至波到时的时差测量方法相比,基于相位差信息的时差测量方法使时间差测量分辨率提升了2个数量级,测量误差降低至0.3%,在地下空间定位领域具有一定的工程应用价值。
Abstract:
Aiming at the problem that the explosion near-field group wave aliasing was serious, the time difference extraction precision and the source positioning accuracy was low, a high-precision time difference measurement method for shallow source location was proposed. The method utilized the characteristics of the blast wave width spectrum to determine the vibration field directly to the P wave dominant frequency in the time-frequency domain, and used the frequency component to extract the corresponding phase difference information between the nodes through the cross-correlation and spectral decomposition algorithm, combined with the first arrival time and the phase-frequency characteristics of the sensor, the phase ambiguity was removed and eventually converted the phase difference into a time difference. Numerical simulation and experimental verification showed that, compared with the time difference measurement method based on the first arrival time, the time difference measurement method based on the phase difference information improved the time difference measurement resolution by two orders of magnitude, and the measurement error was reduced to 0.3% in the underground space.

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备注/Memo

备注/Memo:
收稿日期:2019-10-24
基金项目:国家自然基金青年科学基金资助(61901419);山西省面上青年科学基金资助(201801D221205);山西省高校创新项目资助(201802083);装备预研兵器工业联合基金资助(6141B012904);装备预研兵器装备联合基金资助(6141B021303)
作者简介:李剑(1985—),男,山西太原人,博士,副教授,研究方向:地下多维震动信号处理。E-mail:lijian851208@126.com
更新日期/Last Update: 2020-05-15