Spring-Steel Pipe Fiber Bragg Grating Strain Sensor

Abstract:

Structure’s strain reflects the stability of the project, the excessive structural strain will destroy the stability of the structure. Fiber Bragg Grating has many features, such as, strong anti-interference ability, low optical loss, and it can be used for a long time in the project, etc. Base on the features, the Fiber Bragg Grating Strain Sensor can be used in slope and other projects for the long-term monitoring. In this paper, we develop a Fiber Bragg Grating Strain Sensor based on the spring-steel pipe, FBG be fixed to the inner of the steel pipe by epoxy glue, it is protected by a stainless steel pipe outside, the Flange be fixed to the both side of the spring-steel pipe. When the tension acting one the flanges, the spring-steel pipe occurs an axial strain, this axial strain makes the center wavelength of the Fiber Bragg Grating change, measuring the wavelength shift amount of the Fiber Bragg Grating can calculate the strain. The loading experiment indicates that the sensitivity of the Spring-steel pipe Fiber Bragg Grating Strain Sensor is 0.81pm/με, the linearity of the sensor is 2.1%FS, and the repeatability error of the sensor is 2.29%FS.

• Periodical: Applied Mechanics and Materials (Volume 620)
• Pages: 233-237
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.620.233
• Online since: August 2014
• Authors: Li Peng, Chuan Li*, Zhen Gang Zhao, Sheng Wu, Ying Na Li
• Keywords: Fiber Bragg Grating, Spring-Steel Pipe, Strain, Strain Sensor

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