<title>Advanced fiber-grating strain sensor systems for bridges, structures, and highways</title>

Abstract

Fiber Bragg grating sensor systems have wide application in the area of civil structures. The advantages of fiber grating strain sensors over electrical strain gauges such as greatly reduced size, EMI resistance, and higher temperature capability make them ideal choices for smart structure applications. Some of these fiber grating sensor systems can measure or detect multiaxis strain, transverse strain, temperature, bridge scouring, ice, and traffic flow. SPIE Vol. 3325 • 0277-786X198/$1o.oo Downloaded From: http://proceedings.spiedigitallibrary.org/ on 06/01/2015 Terms of Use: http://spiedl.org/terms

Low-cost all-fiber Bragg grating sensing system for temperature and strain measurements

“…In this paper, following the approach proposed by Schultz et al, 9 an asymmetric fiber grating is used for Bragg signal demodulation, and higher sensitivity and resolution are demonstrated by manipulating both reflected and transmitted signals from the filter. 10,11 Experimental static strain and temperature measurements with a resolution of 0.1°C and 1 are presented.…”

“…Elegant solutions were demonstrated by Melle et al, 4 Kersey and Davis, 5 and Lobo Ribeiro et al 6 involving an edge filter, a wavelengthdivision coupler, and a biconical filter, respectively, for wavelength discrimination. A less-expensive configuration was proposed by Schulty et al 9 involving grating-based filtering. An asymmetric grating with a linear transmission response was used, and the sensor output relied on the ratio between filter transmitted signal and a reference signal in a different fiber arm.…”

A bridge-style fiber-optic weigh-in-motion sensor for military vehicle monitoring

“…7,8 While load cell model uses multi-axis FBGs to respond the transverse loads. 9 The two models involve both longitudinal and transverse loads. For heavy vehicles, transverse deformations of bending plates are often large and close to elastic limits of the plates, which lead to the damage of sensors.…”

“…Fiber Bragg Grating (FBG) WIM sensors have been undergoing rapid development for their ability to respond both longitudinal and transverse strains. [7][8][9] They are often epoxied on the bridge beam directly or embedded into the road pavement as "bending plate" (Fig. 1) or "load cell" (Fig.…”

Bend Sensor Using Fiber Bragg Gratings to Determinate the Distance from the Sensor to the Neutral Axis in Compression and Extension

“…A fibra óptica ha permitido el desarrollo y diseño de nuevos sensores ópticos, que en muchas situaciones son mejores que los diseños electrónicos, debido a características como la inmunidad a interferencias electromagnéticas y su tamaño reducido [1]. Por ello, el estudio y análisis de estos sensores se ha venido incrementando a lo largo de los años.…”