| The intelligent mine will be the most important weapon system to defend arming helicopter hedgehopping in future war. Passive acoustic detection technology is the key technology. With the researching of the national defence pre-researching project which is the research of acoustics compound fuse of anti-helicopter intelligent mine, this paper presents acoustic localization algorithm and discusses the affect of wind to the localization, then a method of how to correct the affect of wind has been studied, upon this a DSP software system has been designed.The paper introduced the theory of passive acoustic localization and the algorithm of space acoustic localization. By use of combined acoustic path difference, the paper amended the passive acoustic localization formula and improved the accuracy of localization. The affect of wind to the localization was discussed specially, upon which a new formula was deduced, and we have tested this new formula by use of computer simulation, which has given a satisfied result.In order to satisfy the need of real time and accuracy of the passive acoustic localization technology, we use TMS320C32 (DSP) which produced by TI company as computing CPU, RAM & ROM of DSP had been extended largely. A whole software system of the passive acoustics detection system has been worked out. The software can satisfy the need of time and accuracy simultaneously, and worked stably.By using pattern recognition theory, we studied target characteristics extract and recognition, as well as neural net recognition algorithm. |
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