지원사업
학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
커뮤니티
연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 발행연도
- 1999.9
- 수록면
- 64 - 68 (5page)
이용수
초록· 키워드
오류제보하기
The performance of a fiber Bragg grating strain sensor constructed with 3×3 coupler is investigated. A 3×3 coupler Mach-Zehnder (M/Z) interferometer is used as wavelength discriminator, interrogating strain-induced Bragg wavelength shifts. Two quadrature-phase-shifted intensities are synthesized from the ac-coupled interferometer outputs, and digital arctangent demodulation and phase unwrapping algorithm are applied to extract the phase information proportional to strain. Due to the linear relation between the input strain and the output of quadrature signal processing, signal-fading problems are eliminated. In the experiment, a fiber grating that was surface adhered on an aluminum beam was strained in different ways, and the photodetector signals were transferred and processed in a computer-controlled processing unit. A phase recovery of 7.8π pk-pk excursion, which corresponds to ~650 μstrain pk-pk of applied strain, was demonstrated. The sensor system was stable over the environmental intensity perturbations because of the self-referencing effect in the demodulation process.
목차
Abstract
Ⅰ. INTRODUCTION
Ⅱ. QUADRATURE SIGNAL PROCESSING
Ⅲ. EXPERIMENTS AND RESULTS
Ⅳ. CONCLUSIONS
ACKNOWLEDGMENTS
REFERENCES
참고문헌 (0)
참고문헌 신청이 논문의 저자 정보
최근 본 자료
댓글(0)
0
UCI(KEPA) : I410-ECN-0101-2009-425-018159257