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Acoustic Near-Field Source-Localization by Two Passive Anchor-Nodes

机译:通过两个被动锚节点进行声场近场声源定位

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摘要

A new scheme is herein proposed to localize an acoustic source. This new method blends the "received signal strength indication" (RSSI) approach of geolocation, and the acoustic vector-sensor (AVS) (a.k.a., vector-hydrophone) based direction-finding (DF). Unlike customary RSSI-based source-localization, this proposed approach needs only two (not three or more) passive anchor-nodes: 1) one pressure-sensor, and 2) one physically compact triad of three (collocating, but orthogonally oriented) acoustic velocity-sensors. The latter can estimate the direction-of-arrival (DOA) of an emitter, regardless of that emitter''s arbitrary/unknown center-frequency, bandwidth, spectrum, and near-field/far-field location. This triad''s DOA estimates can be "distributed processed," locally, apart from the pressure-sensor''s measured power, to estimate the emitter''s radial distance. This proposed algorithm is noniterative, requires no initial estimate, is closed form, and can accommodate any prior known propagation-loss exponent.
机译:本文提出了一种新方案来定位声源。这种新方法融合了地理定位的“接收信号强度指示”(RSSI)方法和基于声矢量传感器(AVS)(又称矢量水听器)的方向搜索(DF)。与常规的基于RSSI的源定位不同,此提议的方法仅需要两个(不是三个或更多)无源锚节点:1)一个压力传感器,以及2)一个物理紧凑的三元组,其中三个(共列,但正交定向)声学速度传感器。后者可以估计发射器的到达方向(DOA),而与该发射器的任意/未知中心频率,带宽,频谱以及近场/远场位置无关。除了压力传感器的测得功率外,三合一的DOA估计值可以在本地进行“分布式处理”,以估计发射器的径向距离。该提出的算法是非迭代的,不需要初始估计,是封闭形式的,并且可以适应任何先前已知的传播损耗指数。

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