Concept Proof of Low-Energy Consumption and Compact Ingestible Thermometer Based on Gastric Acid Power Generation

カテゴリ: 論文誌(論文単位)

グループ名: 【E】センサ・マイクロマシン部門

発行日: 2018/04/01

タイトル(英語): Concept Proof of Low-Energy Consumption and Compact Ingestible Thermometer Based on Gastric Acid Power Generation

著者名: Shinya Yoshida (Tohoku University), Hiroshi Miyaguchi (Tohoku University), Tsutomu Nakamura (Tohoku University)

著者名(英語): Shinya Yoshida (Tohoku University), Hiroshi Miyaguchi (Tohoku University), Tsutomu Nakamura (Tohoku University)

キーワード: ingestible，swallowable，core body thermometer，gastric power generation，telemetry，pill size

要約(英語): This paper presents system design and construction of an ingestible core body thermometer based on the generation of gastric acid power for daily monitoring of basal body temperature during sleep. A custom integrated circuit (IC) with voltage boosting, coding, modulating, and transmitting functions was prototyped. A chip-shaped gastric acid battery based on a pair of Mg and Pt thin-film electrodes was fabricated using microfabrication technology. Charge storage in a multilayer ceramic capacitor at a boosted voltage was demonstrated with the battery and boost circuit in the IC. An evaluation board of the system was also prepared. The essential electrical components were mounted on 3-pieces print circuit board with the diameter of approximately 10 mm, which suggested the possibility of miniaturizing this system to the size of a tablet. The magnetic-field coupling telecommunication of data between a small transmission coil and a loop antenna, as a receiver, was successfully demonstrated. The energy consumption for temperature measurement and transmission was low enough for multiple measurements during sleep. These results proved the feasibility of an ingestible thermometer system.

本誌: 電気学会論文誌E（センサ・マイクロマシン部門誌） Vol.138 No.4 （2018）

本誌掲載ページ: 164-169 p

原稿種別: 論文／英語

電子版へのリンク: https://www.jstage.jst.go.jp/article/ieejsmas/138/4/138_164/_article/-char/ja/