水中物体追跡システムの開発-1-システムの構成と問題点について

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A convenient transponder-type telemetry system for the successive tracking of underwater objects was developed. In this system microphone A of a set of two is set up on the ship's side and microphone B is suspended from the bouy at the end of the towing-rope. The distance between the two microphones and the direction from B to A compose a base line. The distances of the three sides of a triangle formed by the transponder and the two microphones are measured by converting the ultrasonic propagation time to distance. The bearing of the transponder is calculated by the direction of the base line, which is equal to the ship's proceeding course, shown by the gyrocompass and the angle of intersection at microphone A's set point. The ship's position is fixed continuously by one of the electronic navigation systems, and consequently the position of the object is shown by geographical latitude and longitude. There are some problems to be settled on this system. In this paper, the authors discuss the results of the following tests for the problems, i. e.; (1) the deflection of the base line by the yawing of the ship's head while proceeding with automatic steering; (2) the length of time while the accurate bearing of the base line is not calculated due to the curvature of the towing rope caused by altering the course; (3) the accuracy of fixes by electronic navigation systems (Decca and Loran C), which are considered the most suitable accurate systems for this plan.
長崎大学水産学部の論文
1984-02-00

著者

中根重勝
長崎大学水産学部

水中物体追跡システムの開発-1-システムの構成と問題点について

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