昼夜全天候型複合海上監視システムの開発

摘要

海上漂流物は、船舶の安全航行の障害となる場合 がある。特に物理探査船は、昼夜全天候で広範囲に 探査ケーブルを展張し、観測作業を行うため、その 障害となる海上漂流物の監視が重要である。しかし、 従来の海上監視技術である目視及び船舶レーダーで は、夜間や雨天時に小型の非発光物体を検知するこ とが困難であった（1）。%Floating objects on the sea surface are obstacles for a cruising ship, especially for a seismic vessel which needs to tow probing cables in all-day and all-weather as an observational task. However, it is hard to find such nonluminous small objects in the night, or in the rainy weather by the conventional maritime surveillance technology; the eye observation and the marine radar. In this paper, the development of the shipborne hybrid marine surveillance system is described. This system consists of a night-vision camera, an infrared camera, a fluorescence imaging lidar (laser radar) and a horizontally stabilized platform. By the shore experiment and shipborne experiments, the surveillance capacity of this system has been confirmed up to 2 km distance day and night. The horizontal stability of the platform is less than 0.4 degrees. A nonluminous buoy had been found and surveyed successfully by this system from a night cruising vessel.