著者

浜元 勲 林 則行 太良尾 浩生

出版者

宮崎大学工学部

雑誌

宮崎大學工學部紀要 = Memoirs of Faculty of Engineering, University of Miyazaki (ISSN:05404924)

巻号頁・発行日

vol.41, pp.41-47, 2012-07-30

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Researches on contact current and human body resistance by using precise human model at power frequency were carried out. In this study, the absolute values of internal body resistances were calculated for the two current paths. Its showed good agreement with another numerical data. But, they were twice or three times higher than the experimental ones. This implies that the factors such as the difference between in vivo and in vitro conductivities need to be considered. In addition, it was found that the internal resistances are widely influenced by current path which include extremities or not. And then, the current density of extremely high magnitude exceeding 100mA/m2 appears concentrically at heart and spinal cord in the torso as well as at extremities. These results indicate that concentration of internal current is influenced by cross-section area of current path and tissue's conductivity.

著者

平岡 延章 十河 宏行 由良 諭 逸見 知弘 正箱 信一郎 石井 耕平 津守 伸宏 鹿間 共一 漆原 史朗 太良尾 浩生

出版者

一般社団法人 日本機械学会

雑誌

日本機械学会論文集 (ISSN:21879761)

巻号頁・発行日

vol.84, no.862, pp.18-00031, 2018 (Released:2018-06-25)

参考文献数

6

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A motor shaft direct drive is known as a simple and low cost scheme for small toy vehicles, however the mechanism how it produces propelling force has not yet been explained nor discussed in detail. A trivial idea that a small dent is formed on the road surface just under the shaft end due to static weight takes us to the unexpected result. Brief calculus reveals that the propelling force vector of the system directs somewhat forward with respect to sagittal plane which includes motor shaft slant axis. It suggests that the motor alternative cw and/or ccw rotation generates gradual forward movement, i.e. the vehicle moves perpendicular direction with respect to that of right-left swinging motion. The forward motion is confirmed experimentally with single motor shaft direct drive vehicle, and also discussed in details.