Distributed measurement of strain in smart materials using Rayleigh scattering

被引：0
|
作者：
Lopatin, CM [1 ]
Froggatt, M [1 ]
Childers, BA [1 ]
Rogowski, RS [1 ]
机构：
[1] NASA, Langley Res Ctr, Hampton, VA 23681 USA
来源：
REVOLUTIONARY MATERIALS: TECHNOLOGY AND ECONOMICS | 2000年 / 32卷
关键词：
smart materials; sensors; composite materials;
D O I：
暂无
中图分类号：
V [航空、航天];
学科分类号：
08 ; 0825 ;
摘要：
Rayleigh scattering is used to determine distributed strain along a single mode optical fiber. The technique consists of scanning a laser diode source to form an interference pattern between Rayleigh scattered light in the sensing fiber and a reference reflector. This pattern is then Fourier transformed to obtain the spatial distribution of Rayleigh scattering along the fiber. Changes in this distribution during sample loading are then interpreted in terms of strains along the fiber. The technique was demonstrated in several configurations, including beam bending in tension and compression, near a circular hole in a flat tensile specimen, and embedded in a graphite epoxy specimen. Strains up to 500 microstrain were obtained with a spatial resolution of 1 cm.
引用
收藏
页码：231 / 241
页数：11
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