Wireless Locating Method for Point of Impact Based on Acoustic Technique

The paper discuses an automatic detecting scheme that uses acoustics localization technique as detecting principle, which solves the problems such as bad real-time character, low location accuracy and the security that resulted from depending on detecting point of impact artificially in the past. Based on measurements which are limited to time differences of arrival (TDOA) of short-duration acoustic emissions, a new localization method combined with point localization algorithm and zone localization algorithm is put forward for various location tasks. Simulation experiments testify the validity and feasibility of the new location method. The key steps of location system for point of impact involve in the locating procedure include acoustic signal detection, wireless data transmission and point of impact parameters calculation etc. Results based on experiments with real data showed that the system location error is within 5 m in a 400 m times 400 m sensors array.