長時間撮影に対応した水中デジタルカメラKG－6の開発と性能評価

概要

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Underwater photographs of fishing gears and fish behavior are helpful for fishery technical developments and natural environment investigations. Although the spread of digital cameras is progressing, there are few which are easy to handle and have a reasonable price, and can be used for taking underwater images for a long period of time. We designed and engineered an underwater digital camera which combines a commercial digital camera and stroboscopes and can be used for observations in coastal fisheries surveys. The housing that stored the digital camera and stroboscopes could withstand underwater pressure to a depth of 400m. We used a voltage controller to extend battery duration time and be able to take photographs for longer time. Maximum performance lasted 19 hours, taking photographs every 60 seconds interval. Photography experiments were conducted using a trawl net which was towed at a 160m depth and a small set net located at a 10m depth. In both we succeeded to take the good photographs at intervals of30 seconds or 60seconds.
2007-12-25