【摘要】：本文闡述了被動(dòng)式傳感器捕獲振動(dòng)信號(hào)的背景及意義,介紹了目標(biāo)探測技術(shù)的國內(nèi)外研究發(fā)展現(xiàn)狀,研究了地震波的基本理論,特別對(duì)縱波、橫波、瑞利波的形成原因和傳播特性進(jìn)行了詳細(xì)的分析和研究,由于瑞利波的頻率低、能量高和傳播距離遠(yuǎn)的特點(diǎn),認(rèn)為其在目標(biāo)探測中有很高的應(yīng)用價(jià)值。根據(jù)地震波特性,設(shè)計(jì)了采集系統(tǒng)的方案,根據(jù)實(shí)驗(yàn)條件選取了傳感器、采集卡、信號(hào)調(diào)理單元等主要模塊,實(shí)現(xiàn)了對(duì)地震波的信號(hào)采集的功能。研究了地震波信號(hào)的預(yù)處理的方法和初至波的識(shí)別方法,提出了多尺度濾波器捕獲瑞利波的方法,通過地震波的所在瑞利波時(shí)窗內(nèi)極化特征參數(shù)來識(shí)別瑞利波,并進(jìn)行了相關(guān)的實(shí)驗(yàn),數(shù)據(jù)處理結(jié)果與理論算法一致,說明了地震波提取方法的可行性。最后本文使用聯(lián)合定位與跟蹤的方法,將測距和定向分離開來,通過時(shí)差法進(jìn)行震源的測距,再使用單軸傳感器的線性布陣來進(jìn)行定向,避免了Geiger定位跟蹤方法的不穩(wěn)定,又借鑒了線性定位跟蹤的方法。聯(lián)合定位跟蹤實(shí)驗(yàn)結(jié)果表明該方法能夠有效的實(shí)現(xiàn)定位跟蹤的目標(biāo)。
[Abstract]:This paper describes the background and significance of passive sensors capturing vibration signals, introduces the research and development status of target detection technology at home and abroad, studies the basic theory of seismic wave, especially for longitudinal wave and shear wave. The formation and propagation characteristics of Rayleigh waves are analyzed and studied in detail. Due to the characteristics of low frequency, high energy and long propagation distance, Rayleigh waves are considered to have high application value in target detection. According to the characteristics of seismic wave, the scheme of acquisition system is designed, and the main modules such as sensor, data acquisition card and signal conditioning unit are selected according to the experimental conditions to realize the function of signal acquisition of seismic wave. The preprocessing method of seismic wave signal and the identification method of first arrival wave are studied. The method of capturing Rayleigh wave by multi-scale filter is proposed. The Rayleigh wave is identified by the characteristic parameters of polarization in the Rayleigh wave window where the seismic wave is located. Experiments are carried out, and the data processing results are consistent with the theoretical algorithm, which shows the feasibility of seismic wave extraction method. Finally, the method of joint positioning and tracking is used to separate ranging and orientation, and the location of source is carried out by time-difference method, and then the linear array of uniaxial sensor is used to orientate, which avoids the instability of Geiger positioning and tracking method. The method of linear positioning and tracking is also used for reference. The experimental results show that this method can effectively achieve the target location and tracking.
【學(xué)位授予單位】：沈陽理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：P631.4

【共引文獻(xiàn)】

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