Pressure sensing method based on photonic crystal fibers and sensor

Abstract

Disclosed are a pressure sensing method based on photonic crystal fibers and a sensor. Light emitted from a light source is coupled to a pressure sensing head through general conducting fibers, wherein the pressure sensing head is manufactured by the photonic crystal fibers. When pressure acts on the pressure sensing head, size and pitch of air holes of the photonic crystal fibers and pressure thereof are varied linearly, the light source transmission light mold field is varied, welding point coupling loss is then varied, and variation of light strength can be detected by a detector, so that pressure measurement is realized. The sensor is simple in structure, small in size, compatible biologically, independent with temperature and insensitive to electromagnetism and radiation, and the like.

Description

technical field [0001] The present invention relates to an optical sensing method and sensor, more particularly, to an optical fiber sensing method and sensor capable of measuring pressure based on a photonic crystal fiber. Background technique [0002] Optical fiber pressure sensor is widely used because of its low cost, light weight, and not affected by electromagnetic radiation, and it has become the main research direction in this field at the same time. For example, in the medical field, with the promotion of micro-invasive therapy and the extremely narrow space to be detected, miniaturization becomes important. Moreover, the optical fiber has good biocompatibility, which makes the optical fiber sensor have great potential in the production of devices in the fields of bioengineering, medical diagnosis and treatment because of its biological adaptability, small size, low cost, electrical insulation, and electromagnetic interference. attraction. [0003] However, the cu...

AI Technical Summary

Problems solved by technology

Since the photonic crystal fiber is a new type of fiber, there are few studies and reports on its use in pressure measurement, and there is no method and technology for pressure sensing using the characteristics of the mode field change of the photonic crystal fiber when it is pressed.

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