Target tracking system for determining bearing of
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专利名称：Target tracking system for determining bearing of a target
发明人：David P. Olson,Jonathan C. Werder
申请号：US07/582571
申请日：19900914
公开号：US05095467A
公开日：
19920310
专利内容由知识产权出版社提供
摘要：A passive acoustic target tracking system includes three microphones arrayed respectively at corners of an equilateral triangle for sensing acoustic energy emitted by a target, such as a heavy vehicle, and generating separate streams of analog signals representative of the acoustic energy sensed at the triangle corners. Hardware of the tracking system receives the separate streams of analog signals from the microphones and conditions and converts the separate streams of analog signals from analog to digital form and outputs the separate streams as digital signals. Software of the tracking system receives the separate streams of digital signals and provides the bearing to the target emitting the sensed acoustic energy. The software includes a minimum residual correlation algorithm and a two-state kalman filter algorithm. The minimum residual correlation algorithm receives the separate streams of digital signals, performs correlations on the separate streams from pairs of the microphones, and produces a raw azimuth signal as a result of the correlation. The two-state kalman filter algorithm receives the raw azimuth signal, performs a two-state kalman filtering of the raw azimuth signal, and produces a smooth azimuth signal constituting the bearing to the target emitting the sensed acoustic energy.
申请人：ALLIANT TECHSYSTEMS INC.
代理机构：Merchant, Gould Smith, Edell, Welter & Schmidt 更多信息请下载全文后查看