A flexible multi-parameter sensor based on the principle of fiber grating and its preparation

Abstract

The invention provides a flexible multi-parameter sensor based on the fiber grating principle and a preparation method thereof. The sensor includes a plurality of bare fiber gratings fused together, and an outer packaging layer PDMS film; the fiber gratings fused together include three bare fiber grating channels for temperature measurement, three pressure measurements and three humidity measurements; the outer The encapsulation layer includes a high molecular polymer film that encapsulates six optical fiber gratings for measuring temperature and pressure; the high molecular polymer film used in the present invention is organic silicon, that is, polydimethylsiloxane, which has non-toxic, high gas permeability Sex, hydrophobicity, water resistance and high elasticity, avoiding the influence of humidity on temperature and pressure measurement. The fiber grating joints of each channel are respectively led out and connected to the broadband light source and the detection head. A slight change in temperature, pressure and humidity is enough to cause a change in the wavelength of the propagating light in the channel. The wavelength is measured by a spectrometer to detect the temperature. Changes in pressure and humidity.

Description

technical field [0001] The invention relates to a sensor, in particular to a flexible multi-parameter sensor based on the fiber grating principle and a preparation method thereof. Background technique [0002] Conventional sensors are professional devices for collecting control point data. There are many types of commonly used single temperature sensors, single pressure sensors, and single hygrometers. An ideal temperature, pressure and humidity sensor should have the characteristics of low cost, simple preparation and strong versatility. Conventional sensors have broad application prospects in industries such as electricity, automobiles, furniture, and industrial manufacturing. However, conventional temperature or pressure or humidity sensors are mostly made of hard materials, which are not suitable for data detection on the surface of the human body or with irregular surfaces. High processing cost, complex process and other issues. At the same time, most of the conventio...

AI Technical Summary

Problems solved by technology

Conventional sensors have broad application prospects in industries such as electric power, automobiles, furniture, and industrial manufacturing. However, conventional temperature, pressure, or humidity sensors are mostly made of hard materials, which are not suitable for data detection on the surface of the human body or with irregular surfaces. Problems such as high processing cost and complicated process

At the same time, conventional sensors are mostly separated from each other and measure separately, and a single parameter or two parameters are measured

On the one hand, it cannot meet people's needs for multi-parameter measurement, on the other hand, it increases the subsequent design cost

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