Displacement sensor based on optical fiber coupling and manufacturing method thereof

Abstract

The invention relates to a displacement sensor based on optical fiber coupling and a manufacturing method thereof, and belongs to the technical field of detection. The sensor comprises a first single-mode optical fiber and a second single-mode optical fiber which are horizontally arranged, and the first single-mode optical fiber and the second single-mode optical fiber are fused and fixed together in the middle to form a waist area; the included angle between one end of the first single-mode fiber and one end of the second single-mode fiber in the same length direction is set to be an acute angle to form a first conical transition area, and the included angle between the other end is also set to be an acute angle to form a second conical transition area. The displacement sensor based on optical fiber coupling is easy to prepare, simple in structure, uniform in refractive index, low in transmission loss, stable in physical and chemical performance and high in sensitivity, and can be used for high-precision displacement measurement work.

Description

technical field [0001] The disclosure belongs to the technical field of detection, and in particular relates to a displacement sensor based on optical fiber coupling and a manufacturing method thereof. Background technique [0002] The statements herein merely provide background information related to the present disclosure and do not necessarily constitute prior art. [0003] A sensor is a detection device that can sense the measured information and output it according to certain rules and in a certain required form. Due to the advantages of high sensitivity, fast response, high accuracy, small size, electrical insulation, anti-electromagnetic interference, non-corrosion, and suitable for harsh environments, optical fiber sensors have developed rapidly in recent years. It converts the to-be-measured (micro-displacement, temperature, strain, refractive index, magnetic field, gas concentration, etc.) Production and life have brought great convenience. [0004] In the produ...

AI Technical Summary

Problems solved by technology

The micro-displacement sensor based on the capacitance method has the advantages of simple structure, high sensitivity, and non-contact measurement, but there are disadvantages such as small range, non-linear output, complex system, and high cost; the displacement detection based on the principle of laser interference has a large range and fast measurement speed , high resolution, but high requirements for the measurement environment, large volume, not easy to integrate

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