Fiber Fabry-Perot Sensor and Its Application for Monitoring Bridge Strain
XIONG Xian-cai , ZHU Yong , FU Yu-mei, ZHANG Peng ,CHEN Wei-min ,ZHANG Yong-xing
DOI:10.11835/j.issn.1674-4764.2007.03.012
Received ,Revised November 23, 2006, Accepted , Available online July 01, 2015
Volume ,2007,Pages 48-
- Abstract
The strain is an important parameter that reflects the bridge health status, the fiber Fabry-Perot sensor is embedded in the concrete structure as the intelligent sensing element for the bridge strain. The strain measuring system is made up of the fiber Fabry-Perot sensor,light switch,fiber strain gauge and the comput- er; it can be used to monitor automatically the bridge strain. At present,the system has been installed in the Dafosi Bridge over the Yangtze River in Chongqing. The monitoring data show that the fiber Fabry-Perot sensor has good stability and reliability; it can be used to monitor the bridge strain for a long time.