| 摘要 |
PROBLEM TO BE SOLVED: To provide an FBG sensing device having high reliability without a drive part in a light source or a wavelength measurement part, suitable for high-speed measurement such as vibration measurement, having sufficiently large light source output to sufficiently perform remote measurement, having low production cost, and allowing construction of a system simply processing data. SOLUTION: This FBG sensing device has: an FBG (a fiber Bragg grating)reflecting a specific wavelength band, and having a characteristic wherein the reflection wavelength band shifts by receiving strain; the light source outputting light in the FBG reflection wavelength band; and a light receiver detecting light intensity outputted from the light source, and reflected from the FBG. By measuring a change amount of the reflected light intensity caused by the shift of the reflection wavelength band of the FBG, a strain amount of the FBG is detected. COPYRIGHT: (C)2005,JPO&NCIPI
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