Manufacturing method for balloon-dislocation type all-optical fiber sensor capable of simultaneously measuring temperature and displacement

Abstract

The invention discloses a manufacturing method for a balloon-dislocation type all-optical fiber sensor capable of simultaneously measuring temperature and displacement, belongs to the field of opticalfiber sensing, and particularly relates to an optical fiber sensing system which combines a balloon type optical fiber with a dislocation type optical fiber based on a Mach-Zehnder principle and canmeasure the temperature and the displacement at the same time. The invention aims to provide an optical fiber sensor which is simple in structure, firm, durable, low in price, high in sensitivity andcapable of measuring the temperature and the displacement at the same time. The method comprises the following steps: firstly, manufacturing the balloon type optical fiber; secondly, manufacturing thedislocation type optical fiber; and thirdly, connecting the balloon type optical fiber with the dislocation type optical fiber through an optical fiber patch cord. The method is used for manufacturing the balloon-dislocation type all-optical fiber sensor capable of measuring the temperature and the displacement at the same time.

Description

technical field [0001] The invention belongs to the field of optical fiber sensing, and in particular relates to an optical fiber sensing system capable of simultaneously measuring temperature and displacement by combining balloon-shaped optical fibers and misplaced optical fibers based on the Mach-Zehnder principle. Background technique [0002] Due to the inherent nature of thermal expansion and contraction of objects, the size of the object will also change when the temperature changes. These small size changes cannot be ignored in the fields of aerospace, medical testing, and confidential lathes. Therefore, sensors with high sensitivity and the ability to measure temperature and dimensional changes at the same time have a very broad market space. Compared with the optical fiber sensor with the same type of function, the temperature and displacement sensor based on photonic crystal fiber, because the photonic crystal fiber is too sensitive to the change of external physic...

AI Technical Summary

Problems solved by technology

Compared with the optical fiber sensor with the same type of function, the temperature and displacement sensor based on photonic crystal fiber, because the photonic crystal fiber is too sensitive to the change of external physical quantity will cause unnecessary cross-sensing, and the price of photonic crystal fiber is very expensive; based on Mach -The sensing system combined balloon-shaped optical fiber and Bragg grating optical fiber made by Zender principle, because the sensitivity of Bragg grating optical fiber to temperature is low, so there are problems such as low temperature measurement accuracy; micro-nano optical fiber designed with special structure Sensors, although the sensitivity of temperature and displacement measurement can be appropriately improved, but because the structure is too fragile, sensing experiments can usually only be done in the laboratory

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