水分凍結に伴う比誘電率の変化を用いた静電容量型凍結検出センサ

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: 2024/08/01

タイトル(英語): Capacitor Type Freeze Detection Sensor Using the Difference in the Relative Permittivity Caused by Freezing of Contained Water

著者名: 山本　英樹（米子工業高等専門学校総合工学科情報システム部門），井上　学（米子工業高等専門学校総合工学科情報システム部門）

著者名(英語): Hideki Yamamoto (Department of Integrated Engineering, Computer Science and Systems Engineering Division, National Institute of Technology (KOSEN), Yonago College), Manabu Inoue (Department of Integrated Engineering, Computer Science and Systems Engineering Division, National Institute of Technology (KOSEN), Yonago College)

キーワード: 冷凍貯蔵，凍結状態，比誘電率，静電容量，平行平板コンデンサ　　frozen storage，frozen state，relative permittivity，capacitance，parallel plate capacitor

要約(英語): Freezing has been used as a method of preserving agricultural products and foods. In refrigeration technology, it is important to detect the beginning and rate of freezing of food products. By measuring the internal temperature of foods, the beginning and frozen percentage of freezing can be detected. However, internal temperature measurements using contact thermometers such as thermistors and thermocouples cause food destruction and contamination. In this paper, using the difference in relative permittivity between water and ice, the frozen state of two 500 ml containers of water and two pears was measured. To measure agricultural products and foods with 130 mm or less, a large size parallel plate capacitor sensor with aluminum of the plate size of 180 mm × 130 mm and distance of 145 mm was built. At a measurement frequency of 5 MHz, the decrease in capacitance due to the increase of freezing rate was measured, and the frozen state of inside the sample was able to estimate.

本誌: 電気学会論文誌E（センサ・マイクロマシン部門誌） Vol.144 No.8 （2024）

本誌掲載ページ: 199-205 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/144/8/144_199/_article/-char/ja/