A Design of The Underwater Acoustic Beacon Detection and Location Method

Abstract

Aiming at the search of the underwater acoustic beacons used in aircraft or ship parameter recorders, this paper mainly introduces the underwater acoustic beacon detection and location method of the short baseline array system. According to the signal form of underwater acoustic beacon, this paper discusses the basic algorithm and the engineering algorithm applied in this system. In theory, the basic algorithm is a necessary algorithm for short baseline array to calculate target azimuth, which including the two-element linear array direction measurement algorithm, two-direction cross-location algorithm and the virtual direction discrimination algorithm. In addition, according to the experience of offshore operations, this paper introduces the engineering practice methods such as the angle measurement, the data extraction, the location ray screening and the location ray starting point coordinate calculation. The combination of engineering algorithm and basic algorithm can effectively reduce the impact of the test equipment and environment, and improve the accuracy of underwater acoustic beacon detection and position, which has been tested in actual operation at sea.

Underwater acoustic beacon detection device based on Embedded System

“…The existing underwater acoustic beacon detection system as shown in figure 1, which needs to be detected in the water. However, the small-scale underwater acoustic beacon detection device used in the air has a single function [2][3]. The intelligent signal processing method is used to convert the underwater acoustic signal into an audio signal to detect the working state of the underwater acoustic beacon or use the voltage acquisition method to complete the detection of the underwater acoustic beacon battery capacity.…”