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

fYear

2008

fDate

7-9 Nov. 2008

Firstpage

1

Lastpage

4

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;

fLanguage

English

Publisher

ieee

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

Type

conf

DOI

10.1109/APOS.2008.5226289

Filename

5226289