The System Of Distributed Fiber Optical Sensing And Testing

One of the most important advantages of optical fiber sensors is distributed sensing which permits the measurement of a desired parameter along the test fiber. Distributed fiber optic sensors based on bend-induced excess losses are very attractive for the measurement of pressure, temperature, displacement, etc. The target of this paper is to search after the feasibility of inexpensive distributed fiber optic temperature sensor system, which is based on the transmission/reflection analysis of mature fiber optic micro-bend sensor and the combination of SMA (Shape memory alloy) techniques.In this paper, we discuss several forms of distributed fiber optic temperature sensor based on the SMA techniques, and design a machine for the adopted form; prove the feasibility of the localization of a bending loss region both on theory and practice; set up a distributed fiber optic temperature sensor and localization system; present the data at different temperatures and analyze the results, which proves that the system can be used in practice.