Method for preparing temperature-pressure sensor, temperature-pressure sensor structure and temperature-pressure measuring system and method

Abstract

The invention provides a method for preparing a temperature-pressure sensor, a temperature-pressure sensor structure and a temperature-pressure measuring system and method. The method for preparing a temperature-pressure sensor comprises the following steps: fusion splicing the flat end face of a single-mode fiber and the flat end face of a quartz glass tube and cutting the quartz glass tube at a position a preset length close to a fusion splicing port, covering the cutting port of the quartz glass tube with the preset length with the spherical surface of a fiber bubble, fusion splicing the joint of the fiber bubble and the cutting port, cutting the spherical surface of the fiber bubble along a direction in parallel with the cutting port in order that the quartz glass tube with the preset length and the spherical surface of the fiber bubble form a Fabry-Perot interference cavity with the preset length, and making a fiber bragg grating for temperature detection in the single-mode fiber connected with the Fabry-Perot interference cavity by using laser. The method simplifies the process complexity and installation complexity of the temperature-pressure sensor, improves pressure detection accuracy, and enhances the reliability of a temperature and measurement system.

Description

technical field [0001] The invention belongs to the field of optical fiber sensors, and in particular relates to a preparation method and structure of a temperature-pressure sensor and a temperature-pressure measurement system and method. Background technique [0002] In optics, the Fabry–Pérot interferometer (FPI) structure is applied to various optical fiber sensors, which can greatly improve the sensing accuracy. [0003] In practical applications, methods such as chemical etching and coating high reflective films on the end faces of optical fibers can be used to make FPI optical fiber sensors. [0004] However, the existing FPI fiber optic sensors generally can only detect one physical parameter, such as temperature or pressure. If temperature and pressure are to be measured at the same time, it is necessary to install temperature and pressure sensing elements in the sensor at the same time, which will increase the sensor processing. process complexity and installation ...

AI Technical Summary

Problems solved by technology

[0005] The invention provides a preparation method and structure of a temperature-pressure sensor and a temperature-pressure measurement system and method, aiming to solve the problem of high process complexity of sensor processing, complicated installation, low precision of detected pressure, and problems of the temperature and pressure measurement system. The problem of low reliability

Images