Dynamic Response Law of Pipeline Winding Optical Fiber under Internal and External Double Adhesive Layers

In order to further improve the measurement accuracy of the distributed optical fiber flow sensor, this paper proposes a packaging structure of the internal and external double adhesive layers, and establishes a dynamic model of the distributed optical fiber flow sensor including the internal and external double adhesive layers. The influence law of elastic modulus and thickness of internal and external adhesive layers on the dynamic response of optical fiber is analyzed by theoretical calculation, and the theoretical analysis results are verified by experimental analysis. In practical applications, the internal adhesive layer with large elastic modulus and small thickness and the external adhesive layer with small elastic modulus should be selected to form a double adhesive layers structure.