STUDY ON THE EMBEDDED FIBER-OPTIC STRAIN SENSORS OF WHITE LIGHT INTERFERENCE TYPE
More and more fiber optic sensors are used in concrete structural health monitoring in the past several years. In this paper, we aim at the design and fabrication of the white light interferometric fiber optic strain sensor used in concrete structures. This design is focused on the low-cost and high performance. The principle of the white light interference and the fabrication craft of the sensor are discussed. The fiber optic strain sensors and the traditional strain gauge are embedded in a 5 -meter-long concrete model beam together to make a contrast test. The experiments were carried out using the PEM-500A hydraulic test machine. The result shows that the fiber optic strain sensor has good linearity and reliability. The accuracy of the fiber optic sensors is better than 0.8 με.
Fiber optic sensor concrete structure strain white light interferometry
W. T. Zhang J. Y. Dai B. C. Sun Y. L. Du
Key Lab of Structure Health Monitoring and Control of Hebei Province, Shijiazhuang Railway Institute Key Lab of Structure Health Monitoring and Control of Hebei Province, Shijiazhuang Railway Institute
国际会议
上海
英文
1465-1469
2007-11-28（万方平台首次上网日期，不代表论文的发表时间）