Research progress of fiber Bragg grating flexible sensor: A Review

Fiber Bragg Grating (FBG) sensor has the advantages of a lightweight, small size, low transmission loss, high sensitivity, fast response speed, strong anti-electromagnetic interference ability, etc., especially has good flexibility and compatibility, and can be combined by a special preparation process FBG and flexible materials are made into a flexible sensor with high-density distributed sensing. This article reviews the sensing principles of fiber gratings, flexible sensors of different materials, preparation technology, future research focus, and development trends. The silicone rubber flexible sensor, textile woven flexible sensor and other polymer flexible sensors are analyzed. The respective characteristics of the preparation technology are introduced in detail. Finally, main problems, application fields and future research directions of sensors and analyzed.