Title :
Landslide monitoring based on high-resolution distributed fiber optic stress sensor
Author :
Dai, Zhi-Yong ; Liu, Yong ; Zhang, Li-Xun ; Ou, Zhong-Hua ; Zhou, Ce ; Liu, Yong-Zhi
Author_Institution :
Key Lab. of Broadband Opt. Fiber Transm. & Commun. Networks, Univ. of Electron. Sci. & Technol. of China (UESTC), Chengdu, China
Abstract :
We present a landslide monitoring application using a high-resolution distributed fiber optic stress sensor. The sensor is used to monitor the intra-stress distribution and variations in landslide bodies, and can be used for the early warning of the occurrence of the landslides. The principle of distributed fiber optic stress sensing and the intra-stress monitoring method for landslides were described in detail in this paper. By measuring the distributed polarization mode coupling in the polarization-maintaining fiber, the distributed fiber stress sensor with stress measuring range 0-15 Mpa, spatial resolution 10 cm and measuring range 0.5 km, was designed. The warning system was also investigated experimentally in the field trial.
Keywords :
distributed sensors; fibre optic sensors; distributed polarization mode coupling; high-resolution distributed fiber optic stress sensor; intra-stress monitoring method; landslide monitoring; Alarm systems; Monitoring; Optical fiber polarization; Optical fiber sensors; Optical fibers; Spatial resolution; Stress measurement; Terrain factors; Landslides; distributed fiber optic stress sensor; warning monitoring system;
Conference_Titel :
Optical Fiber Sensors Conference, 2008. APOS '08. 1st Asia-Pacific
Conference_Location :
Chengdu
Print_ISBN :
978-1-4244-2131-2
Electronic_ISBN :
978-1-4244-2132-9
DOI :
10.1109/APOS.2008.5226289
