Bonded Fiber Bragg Grating Strain Sensor

To solve the bonding question of fiber with the column structure, the bonded fiber Bragg grating strain sensor was introduced.The sensor was mounted on the surface of cantilever girder, where the strain was derived from the loading, and these reflected spectra of grating followed by the variation of strain were obtained by optical analyzer. The experiment denotes that the response of wavelength shift of the grating to the loading is 0.901 nm/μm and -0.902 nm/μm. The computation shows that the maximum standard error was 0.003 nm.The result indicates that the sensor can be satisfied with the precision demand of structural measurement in architecture engineering.