1P1-D28 物質の相変化を利用した浮力調整装置の開発 : 金属ベローズの伸縮を利用した体積変化の評価

概要

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The final goal of this study is to develop a buoyancy control device for underwater robot utilizing phase change of material. A conventional underwater robot and submarine adjust buoyancy by discarding a set of iron balls or seawater in other place, which is harmful to the environment. Therefore, we proposed new buoyancy control method utilizing phase change of material. In this paper, we report a new buoyancy control device that utilizes metal bellows stretch. Paraffin wax filled in the device was cooled by peltier devices and heated by them and a nichrome wire, resulting in volume change. We conducted experiments and confirmed that the proposed mechanism could increase and decrease its buoyancy. As a result, we confirmed that improve the proposed device can change buoyancy, but the amount of buoyancy change was smaller than expected.