Node Selection and Source Localization of Four-node Wireless Acoustic Array in Wireless Sensor Network

doi:10.3969/j.issn.1000-1093.2016.01.013

Abstract

Abstract: Instead of using microphone array, each sensor node in the sensor network uses only a single microphone as its sensing device in low-cost and miniature wireless acoustic sensor network (WASN). According to the energy decay model and geometric positioning mechanism， an external acoustic source localization estimation method with four-node wireless microphone array is presented for the application in randomly deployed WASN. Major error sources, such as sound attenuation coefficient and array shape, of the localization method are analyzed, and Y-type array model is selected as sensing model. The location error is less than 1m when the angle between the central axis of Y-type array and the target is 60°～100°. A node selection algorithm is proposed, and the experiment of source localization is done. The experimental result shows that Y-type wireless acoustic array can warn about target at 50m away from the wireless sensor network（WSN）.

Key words: ordnance science and technology, wireless acoustic sensor network, four-node wireless acoustic array, node selection, source localization

CLC Number:

TN915.5

ZHU Hai-yang， ZHANG He， MA Shao-jie， PAN Han. Node Selection and Source Localization of Four-node Wireless Acoustic Array in Wireless Sensor Network[J]. Acta Armamentarii, 2016, 37(1): 83-90.

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