All-glass fiber Bragg grating tilt angle sensor

Abstract

The invention discloses an all-glass fiber Bragg grating tilt angle sensor which comprises a glass cover body, a glass cylinder, a glass block, a cross glass rod, an equal-strength tempered glass beam, a first fiber Bragg grating and a second fiber Bragg grating. An internal thread is arranged on the inner wall of the upper part of the glass cylinder and is in threaded connection with an externalthread on the cylindrical surface of the glass cover body to form a closed space. The equal-strength tempered glass beam is fixed to the glass cover body, the cross glass rod is fixed to the lower portion of the equal-strength tempered glass beam, and the glass block is fixed to the lower end of the cross glass rod. The first fiber Bragg grating and the second fiber Bragg grating are both fixed tothe surface of the equal-strength tempered glass beam, and tail end optical fibers of the first fiber Bragg grating and the second fiber Bragg grating are both led out of an optical fiber access holeof the glass cover body. The problems of low sensitivity, complex structure, overlong measurement time and the like of the existing tilt angle sensor are solved, the service life of the sensor is prolonged, and the sensor has a wide application range.

Description

technical field [0001] The invention belongs to the technical field of sensors and relates to optical fiber sensing technology, in particular to a fiber grating inclination sensor made of all glass. Background technique [0002] With the continuous development of detection methods, in addition to the conventional measurement of physical quantities such as temperature, pressure and acceleration, more and more occasions need to measure the tilt state of objects; in some engineering construction, there are still many measurement problems to be solved urgently, and Deformation monitoring of engineering structures and angle measurement of structures are also very important aspects. Therefore, this requires inclination sensors to detect. Inclination sensors are used to measure the angular deflection of an object relative to a reference plane or datum line. They are also often used in large-scale infrastructure such as aviation (such as monitoring the attitude of an aircraft landi...

AI Technical Summary

Problems solved by technology

[0007] Aiming at the above-mentioned problems and deficiencies in the prior art, the present invention provides a fiber grating inclination sensor made of all glass, which solves the problems of low sensitivity, complex structure and long measurement time of the existing inclination sensor, and prolongs the length of the sensor. long life, wide range of applications

Images