Journal of Sensor Science and Technology (센서학회지)

The Korean Sensors Society (한국센서학회)
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Calibrating Electrode Misplacement in Underwater Electric Field Sensor Arrays for the Electric Field-Based Localization of Underwater Vessels

수중 이동체의 전기장 신호 기반 위치추정을 위한 수중 전기장 배열센서의 전극 부설 위치 오차 보정 방법

  • Kim, Jason (Department of Convergence IT Engineering, Pohang University of Science and Technology) ;
  • Lee Ingyu (Department of Convergence IT Engineering, Pohang University of Science and Technology) ;
  • Bae, Ki-Woong (Agency for Defence Development, Maritime Technology Research Institute) ;
  • Yu, Son-Cheol (Department of Convergence IT Engineering, Pohang University of Science and Technology)
  • 김재선 (포항공과대학교 IT융합공학과) ;
  • 이인규 (포항공과대학교 IT융합공학과) ;
  • 배기웅 (국방과학연구소 해양기술연구원) ;
  • 유선철 (포항공과대학교 IT융합공학과)
  • Received : 2022.08.22
  • Accepted : 2022.09.15
  • Published : 2022.09.30
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Abstract

This paper proposes a method to calibrate the electrode misplacement in underwater electric field sensor arrays (EFSAs) for accurate measurements of underwater electric field signatures. The electrode misplacement of an EFSA was estimated by measuring the electric field signatures generated by a known electric source and by comparing the measurements with the theoretical calculations under similar measurement conditions. When the EFSA measured the electric field signatures induced by an unknown electric source, the electric properties of the unknown electric source were approximated by considering the optimized estimation of the electrode misplacement of the EFSA. Finally, the measured electric field signatures were calibrated by calculating the theoretical electric field signatures to be measured with an ideally installed EFSA without electrode misplacement; the approximated electric properties of the unknown electric source were also taken into account. Simulations were conducted to test the proposed calibration method. The results showed that the electrode misplacement could be estimated. Further, the electric field measurements and the electric field-based localization of underwater vessels became more accurate after the application of the proposed calibration method. The proposed method will contribute to applications such as the detection and localization of underwater electric sources, which require accurate measurements of underwater electric field signatures.

Keywords

Acknowledgement

This work was supported by the Agency for Defense Development by the Korean Government (UD200004DD).

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