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2021 Fiscal Year Final Research Report

Development of an Ultra-Long-Life Miniature Rumen pH Sensor Using a Microfluidic Control Device

Research Project

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Project/Area Number 19H03079
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Review Section Basic Section 41040:Agricultural environmental engineering and agricultural information engineering-related
Research InstitutionThe University of Tokyo

Principal Investigator

Itoh Toshihiro  東京大学, 大学院工学系研究科(工学部), 教授 (80262111)

Co-Investigator(Kenkyū-buntansha) 新井 鐘蔵  国立研究開発法人農業・食品産業技術総合研究機構, 動物衛生研究部門, グループ長 (20414732)
宗田 吉広  国立研究開発法人農業・食品産業技術総合研究機構, 動物衛生研究部門, 上級研究員 (20391451)
Project Period (FY) 2019-04-01 – 2022-03-31
Keywordsリモートセンシング / コンピュータネットワーク・ICT / 精密畜産
Outline of Final Research Achievements

In order to realize an ultra-long-life miniature rumen pH sensor, we realized an intermittently operating reference electrode by introducing a low power SMA valve-actuator into a liquid junction and developing a new Ag/AgCl electrode device that can redeposit AgCl. We also proposed a planar all-solid-state glass electrode structure with pressure-sensitive adhesive for ultra-long-life pH sensors, and fabricated a wireless rumen pH sensor with the prototyped glass electrode, which was fed into a fistula-forming cow for wireless communication demonstration. In addition, we investigated the electrode and mounting structure of a rumen bacterial flora power generator to introduce it into the wireless rumen pH sensor as a self-power generator.

Free Research Field

マイクロシステム実装工学

Academic Significance and Societal Importance of the Research Achievements

バルブ液絡型参照電極という新たなコンセプトによるpHセンサの長寿命化技術は、他の流体デバイスなどにも応用可能な技術であり、マイクロマシン分野での学術的な意義は大きい。またpHセンサの長寿命化は、牛ルーメンモニタリングのみならず、環境モニタリングにも資する成果であり、社会的意義も大きい。

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Published: 2023-01-30  

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