Fiber bragg grating pressure sensor used in high-temperature high-voltage environment and manufacturing method

Abstract

The invention relates to a fiber bragg grating pressure sensor used in a high-temperature high-voltage environment. The fiber bragg grating pressure sensor comprises a packaging casing, an elastic body and a fiber bragg grating sensing device, wherein the elastic body and the fiber bragg grating sensing device are arranged in the packaging casing, the elastic body is made from a metal based composite material, the fiber bragg grating sensing device comprises a pressure sensitive optical grating, the pressure sensitive optical grating is embedded into the elastic body, and the surface of the pressure sensitive optical grating is coated with a metal material. The high-voltage and high-temperature resisting performance of the fiber bragg grating pressure sensor can be improved to the great extent, the fiber bragg grating pressure sensor has the advantages of being high in strength, modulus and measurement accuracy. The invention further relates to a manufacturing method of the fiber bragg grating pressure sensor used in the high-temperature high-voltage environment.

Description

technical field [0001] The invention relates to the technical field of optical fiber pressure sensors, in particular to an optical fiber grating pressure sensor used in high temperature and high pressure environments and a manufacturing method. Background technique [0002] Optical fiber pressure sensing technology is one of the key technologies in engineering monitoring technology. The optical fiber pressure sensor uses optical principles and optical fiber technology to convert the sensed signal into an output signal that can be transmitted and measured. In the structure and function of the optical fiber pressure sensor, the optical fiber is both the sensing sensitive element and the transmission signal medium. As a sensing sensitive element, it has the characteristics of high measurement sensitivity and stable performance; as a transmission signal medium, it is free from electromagnetic interference and signal loss. Therefore, the application of optical fiber pressure sen...

AI Technical Summary

Problems solved by technology

[0004] The present invention aims at the problem that the existing fiber grating pressure sensor cannot be applied in a high temperature and high pressure environment due to structural limitations, and provides a fiber grating pressure sensor used in a high temperature and high pressure environment, which can greatly improve the performance of the fiber grating pressure sensor. High pressure and high temperature resistance, with the advantages of high strength, high modulus and high measurement accuracy

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