不均匀地质条件下地震动目标定位方法

鲁志文; 董大伟; 华春蓉; 闫兵; 谢逍; 陈俊

doi:10.3969/j.issn.0258-2724.2015.03.009

不均匀地质条件下地震动目标定位方法

doi: 10.3969/j.issn.0258-2724.2015.03.009

基金项目:

国家自然科学基金资助项目(51305370)

详细信息

作者简介:
鲁志文(1989-),男,博士研究生,研究方向为振动噪声控制及信号处理,E-mail:jdluzhiwen@163.com

通讯作者:
华春蓉(1975-),女,副教授,研究方向为振动噪声信号处理及故障诊断,E-mail:hcrong@swjtu.cn

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出版历程
- 收稿日期: 2014-06-04
- 刊出日期: 2015-06-25

Localization Method of Seismic Target in Anisotropic Ground

摘要

摘要: 针对不均匀地质条件下地震动信号传播速度差异造成定位精度较低的问题,通过将位置域的传播速度转换为时延域的等效传播速度,提出了一种基于时延-等效传播速度检索表的到达时间差(TDOA)目标定位方法.对等腰直角三角形传感器阵列的定位盲区进行了仿真分析,为消除定位盲区,提出了五元十字阵传感器布置方法;进行了场地试验,对运动车辆进行目标定位,对基于时延-等效传播速度检索表的TDOA定位方法与固定传播速度TDOA定位方法的定位结果进行了比较,结果表明,前者的定位效果远优于后者.
- 目标定位 /
- 地震动 /
- 不均匀地质 /
- TDOA /
- 时延-等效传播速度检索表 /
- 五元十字阵
Abstract: In order to solve the problem of low seismic target localization accuracy due to propagation speed variation in anisotropic ground, a novel target localization method was proposed based on the time difference of arrival (TDOA) from the time delay-equivalent propagation speed search table through transforming a position-related propagation speed into a time delay-related equivalent propagation speed. A simulation was carried out to investigate the localization ambiguity area with a right isosceles triangle sensor array. To eliminate this ambiguity area, a five-sensor cross array was put forward. A field experiment was conducted to locate a moving vehicle. The localization results based on the proposed method and the traditional TDOA based method assuming a constant propagation speed of seismic signal were compared with. The comparison result shows that compared with the traditional TDOA based method, the proposed method is much more efficient.
- target localization /
- seismic motion /
- anisotropic ground /
- TDOA (time difference of arrival) /
- time delay-equivalent propagation speed search table /
- five-sensor cross array

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