JIANG Qi, SUI Qing-mei, ZHANG Qing-song, et al. Technology study of optical fiber bragg grating anchor
bar sensor in tunnel strain monitoring[J]. 2006, 27(S1).
JIANG Qi, SUI Qing-mei, ZHANG Qing-song, et al. Technology study of optical fiber bragg grating anchor
bar sensor in tunnel strain monitoring[J]. 2006, 27(S1).DOI:
The principle and method of optical fiber bragg grating (FBG) sensor inspection are analyzed. According to the increasing development and requirement of tunnel construction engineering long-term testing
a kind of optical FBG sensor for diameter 22 mm anchor bar is put forward
designed
and fabricated for tunnel monitoring; because the electromagnetism sensor is not employed stably in rock and soil engineering monitoring. The axial strain of anchor bar can be detected by FBG on anchor bar easily. FBG anchor bar sensor is used in lab and highway tunnel. The experimental and practical results are both good. It is proved that FBG anchor bar sensor is of high precision on measurement
good anti-interference ability
long-term stability
simple structure
online real-time monitoring application of rock and soil