FIBER OPTIC SENSOR BASED ON SPIRAL STRUCTURE

摘要

A fiber optic sensor based on spiral structure is a multi-loop spiral member (4) formed by spring wires. A plurality of deformation teeth (4-1,4-2) are continuously distributed on the upper surface (10) and the lower surface (12) of the spring wires in a longitudinal direction along the spring wires; in two adjacent loops of the spring wires, the deformation teeth (4-1) on the lower surface (12) of the upper spring wire and the deformation teeth (4-2) on the upper surface (10) of the lower spring wire correspond to each other in a staggered way. A signal optical fiber (6) is clamped between the deformation teeth (4-1) on the lower surface (12) of the upper spring wire and the deformation teeth (4-2) on the upper surface (10) of the lower spring wire, and connected to a test unit (5) by a transmission optical fiber (1).