水上オートバイを用いた測深システムの開発

概要

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The detailed topographical changes of the inshore area caused by the sea waves have yet to be elucidated. One of the reasons is the difficulty of inspection of shallow areas by usual vessel due to danger of the stand or overturn. However, the demand to catch correctly the inshore topography is of great importance for the coastline preservation. Recently, the miniaturization of the measurement devices made a rapid progress due to technological innovations. This has stimulated the intensive use of the Real Time Kinematic GPS (RTK-GPS) technology featuring an extremely high accuracy about the vertical axis for maritime measurements. The accuracy characteristics of the RTK-GPS allow the detection of the vessel heaving. In this paper, a system for safety sounding is proposed, and the testing results are discussed. The system equipment includes the RTK-GPS, echo sounder, motion sensor, magnetic compass, indicator and cellular phone, which are mounted in personal water craft. An original short-range echo sounder was newly designed to meet the demands of limited working space. The transducer of the echo sounder was fixed to the inside of the bottom to prevent possible damages in the case of stand. It has been found experimentally that the proposed sounding system with use of personal water craft is accurate to better than 0.1m.
日本水産工学会の論文
2004-06-07