Development of 3 dimensional acoustic measurement system for lotus habitat monitoring at lake Izunuma-Uchinuma.

2015 Fiscal Year Final Research Report

• Project/Area Number: 25870153
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Modeling and technologies for environmental conservation and remediation; Measurement engineering
• Research Institution: The University of Tokyo
• Principal Investigator: mizuno katsunori 東京大学, 生産技術研究所, 助教 (70633494)
• Research Collaborator: SHIMADA Tetsuo 宮城県伊豆沼, 内沼環境保全財団, 上席主任研究員 (30538723) ; FUJIMOTO Yasufumi 宮城県伊豆沼, 内沼環境保全財団, 主任研究員 (20538722)
• Project Period (FY): 2013-04-01 – 2016-03-31
• Keywords: 3次元音響画像 / 音響ビデオカメラ / サブボトムプロファイラー / 音響コアリング / 蓮根 / ハス / オオハクチョウ / 伊豆沼

Outline of Final Research Achievements

We developed a new measurement system for 3D visualization of underwater by using high-resolution acoustic video camera. The method can visualize the underwater with 1 cm resolution without the effect of transparency of water. In addition, we developed a new measurement system to visualize the space of under the water bottom. We confirmed a natural plant root with diameter of 0.025 - 0.030 m in the reconstructed three-dimensional acoustic image. The plant root was at a depth of about 0.54 m. The measurement systems for aquatic plant will be useful for the non-destructive assessment of the status of the space under the water and water bottom.

Free Research Field

水中音響計測