Dynamic Strain Measurement Using Improved Bonding Fiber Bragg Grating
This study proposes an improved bonding method for attaching a fiber Bragg grating (FBG) on surface of a structure to measure its dynamic strains. The improved bonding fiber Bragg grating is called IBFBG for short in this study. The bonding method provides the chance to let the IBFBG and resistance strain gauge measure the longitudinal strain at the same point. This study use two steel cantilever beams, one with rectangular cross section and the other with circular, to demonstrate the ability of the IBFBG in dynamic strain measurements. Their dynamic strains are induced by impacts of a steel ball in free-fall transversely or in pendulum axially, respectively. The obtained strain time histories from both the IBFBG and strain gauge are nearly proportional in amplitudes; in addition, the Fourier spectra of those time histories show the IBFBG recognizes the natural frequencies of the cantilever beams up to 20000 Hz.
Strain Dynamic Fiber Bragg Grating Sensor
Gwo-shyang HWANG Chien-ching MA
Department of Mechanical Engineering, National Taiwan University Taipei, Taiwan;
国际会议
第十七届世界无损检测会议(17th World Conference on Nondestructive Testing)
上海
英文
3603-3610
2008-10-25（万方平台首次上网日期，不代表论文的发表时间）