發(fā)布時(shí)間：2018-11-10 20:35

【摘要】：開展了不同傳感器臺網(wǎng)震源定位實(shí)驗(yàn),分析了不同傳感器臺網(wǎng)布設(shè)下的震源定位誤差分布規(guī)律,研究了震源定位雙曲線域的非均勻特性,揭示了傳感器臺網(wǎng)對震源定位的作用機(jī)制.研究表明:傳感器臺網(wǎng)同時(shí)影響震源定位求解系統(tǒng)的穩(wěn)定性和定位精度,而且傳感器臺網(wǎng)對震源定位結(jié)果的影響具有非均勻性;監(jiān)測區(qū)域中不同位置的震源定位精度和穩(wěn)定性各不相同,傳感器臺網(wǎng)內(nèi)部的震源定位精度和穩(wěn)定性都高于外部震源;隨著震源遠(yuǎn)離臺網(wǎng)中心,定位精度和穩(wěn)定性都呈下降趨勢,且當(dāng)震源到達(dá)傳感器臺網(wǎng)邊緣和臺網(wǎng)外部的區(qū)域時(shí),震源定位精度和穩(wěn)定性的下降速率急劇增加;基于震源定位雙曲線控制方程研究揭示了震源定位雙曲線域的非均勻特性,傳感器臺網(wǎng)通過放大波速和到時(shí)等輸入數(shù)據(jù)誤差影響震源定位結(jié)果,且震源定位雙曲線域的非均勻特性導(dǎo)致傳感器臺網(wǎng)對輸入數(shù)據(jù)誤差的放大效應(yīng)是非均勻的,這種非均勻的放大效應(yīng)是震源定位精度和穩(wěn)定性依賴于震源和傳感器臺網(wǎng)相對位置的重要原因.
[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.
【作者單位】： 中國礦業(yè)大學(xué)煤炭資源與安全開采國家重點(diǎn)實(shí)驗(yàn)室;中國礦業(yè)大學(xué)安全工程學(xué)院;
【基金】：國家自然科學(xué)基金項(xiàng)目(51504250) 江蘇省自然科學(xué)基金項(xiàng)目(BK20150183) 中央高�；究蒲袠I(yè)務(wù)費(fèi)專項(xiàng)資金項(xiàng)目(2015QNA58) 煤炭資源與安全開采國家重點(diǎn)實(shí)驗(yàn)室自主研究課題(SKLCRSM14X04)
【分類號】：P631.4

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