Proceedings of the KSR Conference (한국철도학회:학술대회논문집)
- 2009.05b
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- Pages.387-392
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- 2009
Dynamic monitoring of structures using strain sensors
변형률 센서를 이용한 구조물의 동적 모니터링
- Published : 2009.05.21
Abstract
Measurement of dynamic characteristics are widely used to detect defects in mechanical or civil structures. The most common approach is to measure changes in frequency spectrum or mode shapes using accelerometers. An alternative to using mode shapes is using stain modes. Strain is more sensitive to local defects than displacement, and hence stain modes measurement is an efficient in structural health monitoring. This paper deals with dynamic monitoring of a beam structure using strain sensors. Resistive strain gages and FBG strain gages are used and their characteristics are compared. It has been known that resistive strain gages are week to EMI environment and suffers from noise at high frequency range. It has been shown that the FBG sensor is a good alternative that overcomes such difficulties.
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