深海試験用長距離海中レーザー測距実証機の開発

抄録

As a seafloor visualization technology, sonar technologies based on underwater acoustic propagation has become mainstream and common. On the other hand, even if a high-performance sonar is applied, its resolution is limited, and it is difficult to capture detailed conditions, shapes, and phenomena of seafloor. In addition, underwater mobiles are generally equipped with various acoustic devices that use sound waves for communication, positioning, velocity detection beside sonars. They are affected by acoustic interference. Moreover, since some steering rudders, thrusters, and hydraulic drive devices are installed, their movements become noise sources. Therefore, without using sound waves, a new method that has high resolution and can visualize seafloor over a relatively wide range and long distance is required for seafloor visualization. Based on this, JAMSTEC has been working on the development of a new underwater laser scanner which has advanced higher performance. So far, we have verified each technical issue and new function using an evaluation system. As the next step, we are now developing a demonstration system that is installed on an actual underwater vehicle and assumes performance evaluation in deep sea area. It equips some new technologies and functions including an optimized optical system and an automatic gain controller using optics.