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2016 Vol.29, Issue 3 Preview Page
Application of High-precision Accelerometer Made in Korea to Health Monitoring of Civil Infrastructures

국산 고정밀 가속도계의 건설 구조물 적용성 평가

Kwon Nam-Yeol
,
Kang Doo-Young
,
Sohn Hoon†*
R&D Center, Poongsan FNS, Nonsan, 33003, Korea
R&D Center, Poongsan FNS, Nonsan, 33003, Korea
Department of Civil and Environmetal Engineering, Korea Advanced Institute of Science and Technology, Daejeon, 34141, Korea
•*Corresponding author Sohn, Hoon hoonsohn@kaist.ac.kr
2016. pp. 277-284
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Abstract

A high-precision force-feedback 3-axes accelerometer developed in Korea has been investigated and studied for the verification of feasibility in the computational analysis and health monitoring of civil infrastructures. Through a series of experiment, the nonlinearity, bandwidth, low-frequency signal measurement accuracy and bias characteristics of the accelerometer has been thoroughly compared to those of two accelerometers produced by two market leaders in domestic and global accelerometer market. The experiment results shows that the overall measurement performance of the accelerometer has superiority over the performance of the two accelerometers from global market leader companies. Especially, the accelerometer shows a better low-frequency signal measurement accuracy and constant bias characteristic, which are mostly required in the computational analysis and the long-term health monitoring of large-scale civil infrastructures.

본 논문에서는 풍산 FNS에서 개발한 force-feedback형 고정밀 국산 3축 가속도계의 성능을 실험적으로 평가하고, 건설 구조물 전산구조해석 및 유지관리용 건전성 모니터링에의 적용성을 논한다. 레이트 테이블 및 가진기를 통해 다양한 형태로 가진실험을 수행함으로써 국산 가속도계의 비선형성, 대역폭, 저주파 신호계측 성능, 바이어스 특성을 검증하고, 국내 가속도계 시장의 대부분을 차지하고 있는 해외 업체들의 대표적 가속도계와 성능을 비교 평가하여 국산 가속도계의 적용성과 시장진입 가능성을 평가하였다. 실험분석 결과 국산 가속도계는 실험으로 평가한 모든 항목에서 실험에 사용된 수입 가속도계보다 좋은 성능을 보였다. 특히 건설 구조물 계측에 필수적인 저주파 대역 계측성능은 수입 가속도계의 성능을 능가하였으며, 바이어스도 상수 특성을 가장 잘 유지하는 것으로 나타나 향후 실험기반 구조해석 및 구조물 장기 건전도 모니터링에 좋은 대안이 될 것으로 평가된다.

Keywords
force-feedback accelerometer, nonlinearity, bandwidth, measurement accuracy, bias
강화된 고차전단변형이론, 혼합변분이론, 변위-응력해석, 복합재료 적층평판
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Information
  • Publisher :Computational Structural Engineering Institute of Korea
  • Publisher(Ko) :한국전산구조공학회
  • Journal Title :Journal of the Computational Structural Engineering Institute of Korea
  • Journal Title(Ko) :한국전산구조공학회 논문집
  • Volume : 29
  • No :3
  • Pages :277-284
  • Received Date : 2016-05-04
  • Revised Date : 2016-05-17
  • Accepted Date : 2016-05-18
  • DOI :https://doi.org/10.7734/COSEIK.2016.29.3.277
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