著者

津野田 亘 土方 亘 進士 忠彦

出版者

The Japan Society of Applied Electromagnetics and Mechanics

雑誌

日本AEM学会誌 (ISSN:09194452)

巻号頁・発行日

vol.23, no.1, pp.151-156, 2015 (Released:2015-05-31)

参考文献数

10

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In order to avoid the drive line infection of implantable devices and the surgical treatment for battery replacement, an intravascular micro turbine generator using blood flow, has been proposed and developed. The micro generator consisting of a micro turbine, a magnetic fluid (MF) seal, a stent, and an electrical generator is inserted by catheter into a descending aorta, which is able to reduce the invasiveness to patients. The experimental results using a prototype generator placed in a mock circuit loop showed that the resisting pressure of the MF seal was more than 25 kPa at 2,000 rpm and the generated power was 0.12 mW under a pulsatile flow condition.

著者

佐原 玄太 土方 亘 進士 忠彦

出版者

公益社団法人 精密工学会

雑誌

精密工学会学術講演会講演論文集 2014年度精密工学会秋季大会

巻号頁・発行日

pp.133-134, 2014-09-01 (Released:2015-03-01)

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体内植込み型医療機器の将来的な電源として,電気刺激による筋肉収縮を利用した体内発電システムの実現を目指している.本発表では発電機設計の基礎データを取得するため,カエルの筋肉を対象に,電圧,周波数などを変化させた矩形電圧刺激に対する筋肉の収縮特性を調査した.その結果,疲労が少なく効率の良い筋収縮を引き起こせる電気刺激の条件を明らかにした.

著者

市川 健太 土方 亘

出版者

The Japan Society of Applied Electromagnetics and Mechanics

雑誌

日本AEM学会誌 (ISSN:09194452)

巻号頁・発行日

vol.27, no.2, pp.188-193, 2019 (Released:2019-07-23)

参考文献数

13

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Mouthguard type sensors have been developed to monitor the healthcare-related information. In order to realize a battery-less sensor system, we propose a sheet form generator driven by occlusal force to supply electrical power for mouthguard type sensors. The proposed generator is made by stacking an electret and a dielectric elastomer. It converts mechanical energy applied by occlusion to electrical energy by electrostatic induction. In this study, the generator sheet was designed and its ability of power generation was evaluated experimentally. The prototype generator achieved 6.2 μW under the force equivalent to occlusal force. The generated power was 190 times as large as that of piezoelectric type. Although the achieved power is not sufficient to provide energy for mouthguard sensors so far, the output power will be improved by optimizing shape of dielectric elastomer and surface voltage of electret. The experimental results sufficiently support the possibility to realize the battery-less sensor system.

著者

長岡 英気 土方 亘 進士 忠彦

出版者

東京医科歯科大学生体材料工学研究所

雑誌

生体材料工学研究所年報 (ISSN:13452886)

巻号頁・発行日

vol.43, pp.41-44, 2009