Earticle

초록

영어

The main purpose of this study is to develope a dry-contact geophone sensing device that improves sensor coupling to structural members during elastic wave measurements without a need of coupling materials. Test results in the laboratory showed that the signal-to-noise ratio (SNR) of typical signals from the proposed sensing devise was about 48dB, which was comparable to that of a commercially available integrated circuit piezoelectric (ICP) accelerometer. Furthermore, the value was about 35 dB improved than using a conventional geophone using vacuum grease as a couplant material. In addition, typical signals from the proposed sensing devise had excellent coherence (about 99.6%) to the values from an ICP accelerometer, which was about 10% improved than using a conventional geophone. In addition, when applied to impulse response and multichannel analysis of surface waves, the proposed sensing devise resulted in equivalent or improved accuracy compared to the two conventional sensors and significantly improved test speed.

목차

Abstract
 1. 서론
 2. 드라이 컨택 지오폰 센싱 장치 개발 및성능평가를 위한 실험계획
  2.1 원리 및 시작품 제작
  2.2 성능검증을 위한 실험
 3. 실험결과 및 토의
  3.1 하중이력
  3.2 센서신호
  3.3 신호일관성 분석
 4. 드라이 컨택 지오폰 센싱 장치의 활용
  4.1 충격응답기법(Impulse response, IR)
  4.2 표면파 측정 및 분산곡선 분석
 5. 요약 및 결론
 REFERENCES

저자

• 정해상 [ Jung, Hae-Sang | 한국시설안전공단, 시설진단본부 진단평가지원실 ]
• 기성훈 [ Kee, Seong-Hoon | 동아대학교 건축공학과 조교수, 공학박사 ] Corresponding author
• 김제경 [ Kim, Jae-Kyung | 동아대학교 해양도시건설·방재연구소 전임연구원, 공학박사 ]
• 오태근 [ Oh, Tae-keun | 인천대학교 안전공학과 부교수, 공학박사 ]

참고문헌