传感器台网布设对震源定位的影响规律及机制研究
发布时间：2018-11-10 20:35
【摘要】：开展了不同传感器台网震源定位实验,分析了不同传感器台网布设下的震源定位误差分布规律,研究了震源定位双曲线域的非均匀特性,揭示了传感器台网对震源定位的作用机制.研究表明:传感器台网同时影响震源定位求解系统的稳定性和定位精度,而且传感器台网对震源定位结果的影响具有非均匀性;监测区域中不同位置的震源定位精度和稳定性各不相同,传感器台网内部的震源定位精度和稳定性都高于外部震源;随着震源远离台网中心,定位精度和稳定性都呈下降趋势,且当震源到达传感器台网边缘和台网外部的区域时,震源定位精度和稳定性的下降速率急剧增加;基于震源定位双曲线控制方程研究揭示了震源定位双曲线域的非均匀特性,传感器台网通过放大波速和到时等输入数据误差影响震源定位结果,且震源定位双曲线域的非均匀特性导致传感器台网对输入数据误差的放大效应是非均匀的,这种非均匀的放大效应是震源定位精度和稳定性依赖于震源和传感器台网相对位置的重要原因.
[Abstract]:In this paper, the source location experiments of different sensor networks are carried out, and the distribution law of the source location error under different sensor networks is analyzed, and the nonuniform characteristics of the hyperbolic region of the source location are studied. The mechanism of sensor network acting on focal location is revealed. The results show that the sensor network affects the stability and accuracy of the focal location solution system, and the influence of the sensor network on the source location results is non-uniform. The location accuracy and stability of different locations in the monitoring area are different, and the location accuracy and stability of the source inside the sensor network are higher than those of the external source. With the focal distance away from the center of the network, the positioning accuracy and stability of the seismic source decrease, and when the source reaches the edge of the sensor network and the region outside the network, the decreasing rate of the location accuracy and stability of the source increases sharply. Based on the hyperbolic control equation of source location, the nonuniformity of hyperbolic domain is revealed. The sensor network influences the location result by amplifying the velocity of wave and the error of input data such as arrival time. Moreover, the nonuniformity of hyperbolic domain in the source location leads to the non-uniform effect of the sensor network on the input data error. This non-uniform amplification effect is an important reason that the location accuracy and stability of the source depend on the relative position of the source and the sensor network.
【作者单位】： 中国矿业大学煤炭资源与安全开采国家重点实验室;中国矿业大学安全工程学院;
【基金】：国家自然科学基金项目(51504250) 江苏省自然科学基金项目(BK20150183) 中央高校基本科研业务费专项资金项目(2015QNA58) 煤炭资源与安全开采国家重点实验室自主研究课题(SKLCRSM14X04)
【分类号】：P631.4
本文编号：2323545
[Abstract]:In this paper, the source location experiments of different sensor networks are carried out, and the distribution law of the source location error under different sensor networks is analyzed, and the nonuniform characteristics of the hyperbolic region of the source location are studied. The mechanism of sensor network acting on focal location is revealed. The results show that the sensor network affects the stability and accuracy of the focal location solution system, and the influence of the sensor network on the source location results is non-uniform. The location accuracy and stability of different locations in the monitoring area are different, and the location accuracy and stability of the source inside the sensor network are higher than those of the external source. With the focal distance away from the center of the network, the positioning accuracy and stability of the seismic source decrease, and when the source reaches the edge of the sensor network and the region outside the network, the decreasing rate of the location accuracy and stability of the source increases sharply. Based on the hyperbolic control equation of source location, the nonuniformity of hyperbolic domain is revealed. The sensor network influences the location result by amplifying the velocity of wave and the error of input data such as arrival time. Moreover, the nonuniformity of hyperbolic domain in the source location leads to the non-uniform effect of the sensor network on the input data error. This non-uniform amplification effect is an important reason that the location accuracy and stability of the source depend on the relative position of the source and the sensor network.
【作者单位】： 中国矿业大学煤炭资源与安全开采国家重点实验室;中国矿业大学安全工程学院;
【基金】：国家自然科学基金项目(51504250) 江苏省自然科学基金项目(BK20150183) 中央高校基本科研业务费专项资金项目(2015QNA58) 煤炭资源与安全开采国家重点实验室自主研究课题(SKLCRSM14X04)
【分类号】：P631.4
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