基于瑞利波的目标定位与跟踪技术研究
发布时间：2018-08-25 12:15
【摘要】：本文阐述了被动式传感器捕获振动信号的背景及意义,介绍了目标探测技术的国内外研究发展现状,研究了地震波的基本理论,特别对纵波、横波、瑞利波的形成原因和传播特性进行了详细的分析和研究,由于瑞利波的频率低、能量高和传播距离远的特点,认为其在目标探测中有很高的应用价值。根据地震波特性,设计了采集系统的方案,根据实验条件选取了传感器、采集卡、信号调理单元等主要模块,实现了对地震波的信号采集的功能。研究了地震波信号的预处理的方法和初至波的识别方法,提出了多尺度滤波器捕获瑞利波的方法,通过地震波的所在瑞利波时窗内极化特征参数来识别瑞利波,并进行了相关的实验,数据处理结果与理论算法一致,说明了地震波提取方法的可行性。最后本文使用联合定位与跟踪的方法,将测距和定向分离开来,通过时差法进行震源的测距,再使用单轴传感器的线性布阵来进行定向,避免了Geiger定位跟踪方法的不稳定,又借鉴了线性定位跟踪的方法。联合定位跟踪实验结果表明该方法能够有效的实现定位跟踪的目标。
[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.
【学位授予单位】：沈阳理工大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：P631.4
本文编号：2202853
[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.
【学位授予单位】：沈阳理工大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：P631.4
【共引文献】
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