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TEMPERATURE-COMPENSATED FIBRE OPTIC STRAIN GAUGE

机译:温度补偿光纤应变片

摘要

A temperature-compensated fibet optic strain gauge (10) for measuring strain of a host structure (5), the strain gauge (10) comprising: a mount (20) having a void (19) separating a first section (17) from a second section (18); a first fiber Bragg grating (FBG) (30); a second fiber Bragg grating (FBG) (40); and removable bridging portions (24) adjacent to the void (19) to connect the first section (17) to the second section (18), the bridging portions (24) being removed after the mount (20) is operatively attached to the host structure (5); wherein a right-side failure proof feature is provided by detecting whether a reflection wavelength reverts to an original Bragg wavelength of the first FBG (40) to indicate whether the first FBG (40) has broken.
机译:一种用于测量主体结构(5)的应变的温度补偿光纤光学应变仪(10),该应变仪(10)包括:底座(20),其具有将第一部分(17)与第二部分(17)隔开的空隙(19)。第二部分(18);第一光纤布拉格光栅(FBG)(30);第二光纤布拉格光栅(FBG)(40);以及与空隙(19)相邻的可移动桥接部分(24),以将第一部分(17)连接到第二部分(18),在将底座(20)可操作地连接到主机上之后,将桥接部分(24)移除结构(5);其中,通过检测反射波长是否恢复为第一FBG(40)的原始布拉格波长以指示第一FBG(40)是否破裂,来提供右侧防故障特征。

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