High-resolution dense fiber grating laying method

Abstract

The invention discloses a high-resolution dense fiber grating laying method. The method is as follows: first of all, decontamination processing is performed on fiber gratings and the surface, for bonding the fiber gratings thereto, of an object to be tested, then, the multiple fiber gratings are horizontally fixedly arranged on the surface of the object to be tested, the principle for fixed arrangement is that the multiple fiber gratings are parallel to one another, adjacent fiber gratings are spaced at proper intervals, it is ensured that apart from the first fiber grating, the initial position of a first-section Bragg raster etched on each of other fiber gratings is aligned with the tail-end position of the first-section Bragg raster etched on a previous fiber grating, and after the last fiber grating is fixedly arrangement, it should also be ensured that the tail-end position of the first-section Bragg raster etched on the last fiber grating is aligned with the initial position of a second-section Bragg raster etched on the first fiber grating. The method provided by the invention has the following advantages: materials are conveniently obtained, and the space distribution rate is greatly improved through offset arrangement.

Description

Technical field: [0001] The invention relates to the technical field of optical fiber gratings, in particular to a high-resolution dense optical fiber grating laying method which is convenient for obtaining materials and can improve spatial resolution. Background technique: [0002] Fiber Bragg grating sensors detect physical quantities such as temperature, strain, and pressure by detecting changes in wavelength, and have been successfully applied in fields such as aerospace and navigation, construction transportation, energy, chemical industry, and environmental protection. According to different structures to be tested, distributed fiber grating sensors generally use single or multiple Bragg gratings of different periods carved on a single fiber, and then after different packaging, the fiber is directly embedded, surface-mounted, and pre-packaged. On the steel plate or in the capillary, clamped and fixed at both ends, etc., the physical quantity of the fiber grating measur...

AI Technical Summary

Problems solved by technology

[0003] Fiber Bragg gratings are generally laid out with a single fiber, and can only measure physical quantities near the Bragg grating, such as: temperature, strain, pressure, displacement, pressure, torsion angle, torque (torsion stress), acceleration, current, voltage, magnetic field, Frequency, concentration, thermal expansion coefficient, vibration, etc., that is, one-dimensional spatial distribution. For the measurement of two-dimensional or three-dimensional spatial distribution, due to the limitation of the spacing of fiber gratings on a single optical fiber, a single optical fiber sometimes cannot provide enough space. resolution

Images