Substrate type temperature-strain measurement FBG (Fiber Bragg Grating) sensor and performance testing method

Abstract

The invention discloses a substrate type temperature-strain measurement FBG (Fiber Bragg Grating) sensor, which is characterized by comprising a substrate, a first FBG and a second FBG, wherein the first FBG and the second FBG are sequentially arranged on the substrate from left to right; the first FBG and the substrate are adhered through DP420 glue, and the second FBG and the substrate are adhered through 353ND glue; and the substrate is uniformly provided with fixing holes. A testing system in the step S1 comprises a circulator, a Fluke water bath, a broadband light source and a demodulation instrument, wherein an output end of the broadband light source is electrically connected with an input end of the circulator; an FBG sensor placed in the Fluke water bath is electrically connectedwith the circulator through a wire. The substrate type temperature-strain measurement FBG sensor and the performance testing method not only perform decoupling on the temperature and the strain, but also achieve an effect of performing decoupling on the temperature and the strain simultaneously; and the sensor can simultaneously measure the temperature and the strain, and the strain sensitivity isimproved.

Description

technical field [0001] The invention relates to the technical field of FBG temperature sensors, in particular to a substrate-type temperature strain measuring FBG sensor and a performance testing method. Background technique [0002] The optical fiber material is silica, a brittle and fragile material with poor toughness and weak shearing ability. It is particularly important to protect it. The packaging process has a great impact on the sensing performance of FBG. It is particularly important to explore possible ways of sensitization and desensitization of FBG sensors, as well as packaging, adhesion techniques and new structural processes. [0003] The existing FBG temperature sensor has a strong sensitivity to temperature, and it is not easy to control its performance in the production process. In some special cases, it is desired to measure strain and temperature at the same time, and the temperature and strain are simultaneously increased, which cannot meet the requireme...

AI Technical Summary

Problems solved by technology

[0004] Aiming at the deficiencies of the prior art, the present invention provides a substrate-type temperature strain measurement FBG sensor and a performance testing method, which solves the difficult problems raised in the background technology

Images