Journal of Sensor Science and Technology (센서학회지)

The Korean Sensors Society (한국센서학회)
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Development of Multi-rod Type Ag-AgCl Electrodes for an Underwater Electric Field Sensor

수중 전기장 센서용 다중 막대형 은-염화은 전극 개발

  • Lee, Sangkyu (Maritiem Technology Research Institute, Agency for Defense Development) ;
  • Yang, Chang-Seob (Maritiem Technology Research Institute, Agency for Defense Development) ;
  • Chung, Hyun-Ju (Maritiem Technology Research Institute, Agency for Defense Development)
  • 이상규 (국방과학연구소 해양기술연구원) ;
  • 양창섭 (국방과학연구소 해양기술연구원) ;
  • 정현주 (국방과학연구소 해양기술연구원)
  • Received : 2022.01.10
  • Accepted : 2022.01.22
  • Published : 2022.01.31
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Abstract

Multi-rod type Ag-AgCl electrodes have been developed for use in underwater electric field sensors. The developed cylindrical electrode had a diameter of 50 mm and a height of 130 mm. The electrode had five Ag-AgCl rods with a diameter of 2 mm and a height of 80 mm to enlarge the reaction surface area. Each Ag-AgCl rod was fabricated under the same conditions as the usual anodizing method in an electrolyte. The two developed electrodes were placed in the center of a 500-mm long, 400-mm wide, and 300-mm high acrylic tank filled with artificial seawater, at an interval of 100 mm, to evaluate their characteristics as uniaxial underwater electric field sensors. The underwater external electric field was generated using titanium plate electrodes installed at both ends of the tank. The noise level at 1 Hz of the developed electrode was approximately 3.7 nV/√Hz. The reception of the underwater electric field signal using the developed electrode was linear, within an error of approximately 0.6 %, in the range of 1-10000 ㎶/m at 1 Hz. In addition, its frequency response was flat within an error of 1.1 % in the range of 1-1000 Hz at 10000 ㎶/m.

Keywords

Acknowledgement

본 연구는 국방과학연구소가 수행하는 "50 nV급 수중 전기장센서 설계 기술"과제의 일환으로 진행되었습니다 [사업부호: 912741201].

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