著者

萩 浩司 牧川 方昭 飯泉 仁美

出版者

一般社団法人電子情報通信学会

雑誌

電子情報通信学会技術研究報告. MBE, MEとバイオサイバネティックス

巻号頁・発行日

vol.95, no.291, pp.1-8, 1995-10-13

被引用文献数

1

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本研究は生体内にコンピュータならびに計測回路などの,生体内信号の直接計測に必要な一切の要素を埋め込むことを最終目標とし,今回はこのような体内コンピュータ実現に不可欠な要素である皮膚を介した情報通信の方法,電力供給の方法について検討を行った.体内と体外のコンピュータ間の経皮ディジタル通信は赤外線を用いたシリアル通信を検討し,皮下に赤外発光ダイオードおよび受光センサを埋め込むことにより体内・体外間の双方向ディジタル通信が可能であることが明らかとなった.また経皮的電力供紿に関しては皮膚表面に一種のトランスを形成することにより実現できることが確認された.

著者

萩 浩司 牧川 方昭 飯泉 仁美

出版者

一般社団法人 日本生体医工学会

雑誌

医用電子と生体工学 (ISSN:00213292)

巻号頁・発行日

vol.33, no.4, pp.334-342, 1995 (Released:2011-10-14)

参考文献数

19

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In this study we have developed a transcutaneous digital communication technique by using Pulse-Code-Modulated (PCM) infrared rays. The communication protocol examined here is serial, asynchronous and half duplex. The electric power should be considered for a computer system implanted inside the body, because it is driven by batteries and the power is insufficient. Its size should also be miniaturized as small as possible. Therefore the following methods were adopted here; the weak infrared rays emitted inside the body were received by a high sensitive avalanche photodiode; the infrared rays of high brightness was used to send data into inside of the body; and the digital data were converted into an optical signal after the pulse-code-modulation (PCM). This modulation yields some advantages; 1) absorbing the response delay of the photosensor, 2) intensifying infrared rays luminescence outside body and 3) saving the electric power on the luminescence inside body. Some communication experiments were done by using pork with the skin; the communication speed was 9600 baud from inside to outside and 1200 baud in the opposite direction, 15 infrared LEDs were set for outside of the body, 4 for inside, three nickel hydride batteries of 1200mAh were used for an electric power inside the body. As a result, a stable bi-directional digital communication was realized through the skin and the pork of about 9cm and it could continue to operate for about 19 hours.