Manufacturing method of optical fiber and optical grating polymer encapsulation temperature sensor used for intelligent garment

Abstract

The invention relates to a novel optical fiber and optical grating polymer encapsulation temperature sensor, belonging to the technical field of sensing. The existing traditional electrical temperature sensor is easily influenced by external electromagnetic interference and has low measurement precision; and bare optical fibers and bare optical gratings are easy to be broke off and are easily influenced by external stress. The invention provides a method adopting an unsaturated polyester resin polymer to encapsulate optical fibers and optical gratings. Unsaturated polyester resin has high thermal expansion coefficient and effectively increases the thermo-sensitive coefficient of the sensor. The built-in fixation of the optical fibers and the optical gratings not only isolates the axial strain of the optical fibers but also effectively reduces external strain interference. The novel temperature sensor has simple structure, low cost, portability, convenience and high thermo-sensitive coefficient. As the optical fibers and the optical gratings have the characteristics of high measurement sensitivity, explosion prevention, electromagnetic interference resistance and the like, the temperature sensor can be widely applied to the temperature measurement in various working environments.

Description

technical field [0001] The invention belongs to the technical field of sensors, and in particular relates to an optical fiber grating temperature sensor packaged with a polymer, which is used in intelligent clothing to detect the temperature of a human body. Background technique [0002] The fiber grating sensor can be embedded in the measured object and material to receive and convert many physical quantities such as pressure, temperature, stress, strain, flow velocity, and flow into electrical signal output. The wavelength shift, phase change, polarization state change and intensity change of the fiber grating reflection or transmission spectrum are caused by the change of the fiber grating, and the detection purpose of the measured physical quantity is achieved by demodulating these spectral changes. Because fiber grating has many advantages such as good durability, anti-electromagnetic interference, single-ended input, small size, quasi-distribution measurement, anti-hum...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a polymer packaged temperature sensor based on fiber grating technology, which solves the problem that the existing electric temperature sensor is easily affected by external electromagnetic interference, the measurement accuracy is not high, and the bare fiber grating is easily broken and easily affected by the outside world. Disadvantages such as stress influence and low temperature sensitivity coefficient

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