基于矢量传感器阵列的定位方法研究

发布时间：2018-07-04 20:09

本文选题：矢量传感器 + 阵列信号处理　；参考：《中北大学》2017年硕士论文

【摘要】：基于矢量阵列的信号处理原理是将不同的矢量传感器分别放置在水下不同的位置,组成传感器阵列,然后通过这些阵列接收并处理声源发出的信号,提取信号的相关信息及特征,同时抑制相应的噪声及干扰,该方法已被广泛应用于海洋探索及研究领域。本文基于矢量水听器阵列,研究了信号的处理技术及定位方法,主要内容如下:(1)依据声压与粒子速度之间的旋转关系,即声矢量阵的自身特性,本文提出了一种改进的ESPRIT算法,该算法适用于任意形状的阵列。为了验证上述提出的ESPRIT算法新形式的可行性,分别采用5元声矢量均匀线阵(Uniform Linear Array,ULA)和圆阵(Uniform Circle Array,UCA)做实验,并用两个独立信号分别从和方向入射到阵列,实验数据表明UCA的估计性能要优于ULA,在较低信噪比、较小快拍数下能获得更高的成功概率和更小的均方根误差(RMSE)。(2)基于二元矢量阵列的定位原理,分别介绍了球面交汇定位算法和双曲面交汇的定位方法,利用传感器阵列,检测声源目标发出的声音信号,然后计算各传感器所接收信号的时延差,从而获得目标的距离值。实验数据及结果表明,球面交汇定位方法受时间测量误差及时延误差的影响相对较小,在实际应用中更理想一些。
[Abstract]:The principle of signal processing based on vector array is to put different vector sensors in different positions under water to form sensor arrays, and then receive and process the signals from sound sources through these arrays. This method has been widely used in ocean exploration and research. Based on the vector hydrophone array, the signal processing technology and localization method are studied in this paper. The main contents are as follows: (1) according to the rotational relationship between sound pressure and particle velocity, that is, the characteristics of acoustic vector array, an improved Esprit algorithm is proposed. The algorithm is suitable for arbitrary arrays. In order to verify the feasibility of the proposed Esprit algorithm, the experiments are carried out by using uniform Linear Array (ULA) and uniform Circle Array (UCA), respectively, and two independent signals are incident to the array from the direction and direction, respectively. The experimental data show that the estimation performance of UCAs is better than that of ULAs. It can obtain higher probability of success and smaller root mean square error (RMSE). (2) based on the principle of binary vector array. The spherical intersection location algorithm and the hyperbolic intersection location method are introduced respectively. The acoustic signals emitted by the sound source target are detected by the sensor array and the delay difference of the signals received by each sensor is calculated to obtain the distance value of the target. The experimental data and the results show that the spherical intersection positioning method is relatively less affected by the delay of time measurement error, and is more ideal in practical application.
【学位授予单位】：中北大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TP212

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