Single-end temperature measurement sensor for fiber Bragg grating

Abstract

The invention discloses a single-end temperature measurement sensor for fiber Bragg grating, which belongs to sensors and comprises fiber Bragg grating, optical fibers in an optical cable in fusion splice with the fiber Bragg grating, and a package shell for packaging the fiber Bragg grating. Fusion splices of the fiber Bragg grating with the optical fibers in the optical cable are coated with fusion splice coatings, the fusion splice coatings are as thick as fiber coatings, the package shell comprises an open container and a cover board connected with the open container, a solidification area and a quick connection area are arranged at an open end of the open container, the cover board is connected with the quick connection area through instant glue and connected with the solidification area through securing glue or thermal conductive glue, a fiber connector is further connected to the other end of each optical fiber of the optical cable, and a silicone sheath tube is arranged outside the optical cable between the fiber connector and the package shell. Therefore, reliability of the fiber Bragg grating sensor is improved, long-distance welding-spot-free transmission of optical signals can be realized, and mounting and demounting of the sensor are also facilitated.

Description

technical field [0001] The invention relates to a sensor, in particular to a fiber grating temperature sensor. Background technique [0002] Optical fiber sensor technology has application advantages unmatched by other sensing technologies, making it play an increasingly important role in the safety detection of major infrastructure, major engineering structures and high-risk projects. [0003] Whether it is to increase the transmission distance of optical fiber relay amplification in optical fiber communication, improve the attenuation margin of optical fiber links, fiber-to-the-home solutions, or realize distributed topology detection structures and system connections in optical fiber sensor networks Income plays an important role. The splice protection directly determines the service life and maintenance cost of the system. [0004] Fusion protection devices usually include heat-shrinkable tube protection and fixed and sealed structures, but the heat-shrinkable tube is ...

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Problems solved by technology

[0005] Moreover, it is inconvenient to expand / change the number of sensors of a single unit of the existing fiber grating sensor on the original basis, and the existing fusion point is easy to limit the transmission distance from the sensor to the coupler, which is very inconvenient for the application and development of the fiber grating sensor

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