微細周期構造の付与で検出特性を改善した気泡センサ
微細周期構造の付与で検出特性を改善した気泡センサ
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: 2016/04/01
タイトル(英語): Improvement of Precision of Gas-bubble Sensor by Surface with Periodic Structure
著者名: 山口 昌樹(信州大学 繊維学部),平岡 仁((株)荻原製作所)
著者名(英語): Masaki Yamaguchi (Faculty of Textile Science & Technology, Shinshu University), Hitoshi Hiraoka (Ogihara Mfg. Co., Ltd.)
キーワード: 気泡センサ,撥水,周期構造,接触角,固体酸化物型燃料電池 gas-bubble sensor,water repellency,periodic structure,contact angle,solid oxide fuel cell
要約(英語): In solid oxide fuel cell, carbon dioxide is generated in the water circulator and tends to accumulate in the reformer. If the air bubble forms a fair size, it disturbs the water flow and gives damage to the water circulator. For practical applications, long-term operation with an air bubble detection capability is needed. The purpose of this paper is to enhance the sensitivity of the air-bubble sensor by increasing the physical water repellency of its detecting surface using micro- and nano-periodic structures. The air-bubble sensor comprised a cylindrical sleeve with two coil shaped-electrodes and a ground electrode. Four types of sleeves for the air-bubble sensor with different micro- and nano-periodic structures on the surface of a detection area were fabricated. As the results, it was found that i) a micro-periodic structure increased the apparent contact angle of air bubble from 50° to 89°, and ii) a V-shaped micro-periodic structure could degrease the accidental error by improving the wettability. The electrode voltage was increased toward the detection threshold level and the detected time was prolonged when the apparent contact angle of water was small, showing that which increase the probability of false detection. Additionally, the detecting sensitivity of the air-bubble sensor was increased by forming a micro-periodic structure on the surface. In summary, a micro-periodic structure has the effects improving the detecting precision of air-bubble sensor.
本誌: 電気学会論文誌E(センサ・マイクロマシン部門誌) Vol.136 No.4 (2016)
本誌掲載ページ: 108-114 p
原稿種別: 論文/日本語
電子版へのリンク: https://www.jstage.jst.go.jp/article/ieejsmas/136/4/136_108/_article/-char/ja/
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