Optical fiber ring scale factor test method based on distributed optical test

By combining a high-performance OFDR testing system with a polarization diversity structure, the accuracy problem of scaling factor measurement of fiber optic gyroscopes under rapid temperature change conditions was solved, thereby improving the performance of fiber optic gyroscopes and optimizing the manufacturing process.

CN122149525APending Publication Date: 2026-06-05GUANGDONG UNIV OF TECH
6 Cites 0 Cited by

Patent Information

Application Number
CN202610164136.9
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-02-05
Publication Date
2026-06-05

AI Technical Summary

Technical Problem

Existing technologies cannot accurately measure the scaling factor of fiber optic gyroscopes under rapid temperature changes, which affects the overall performance of fiber optic gyroscopes and the improvement of manufacturing processes.

Method used

A high-performance OFDR testing system was used to acquire two orthogonally polarized signals, P and S, under normal temperature and rapid temperature change conditions through a polarization diversity structure. Autocorrelation and cross-correlation demodulation were performed, and combined with signal filtering, wavelet denoising and sliding window processing, the temperature and strain parameters were decoupled, and the scaling factor of the fiber ring was calculated.

Benefits of technology

This technology enables accurate measurement of the scaling factor of the sensing ring of a fiber optic gyroscope under rapid temperature changes, guiding the research and development and production process adjustment of fiber optic gyroscopes, and improving the temperature performance and stability of fiber optic gyroscopes.

✦ Generated by Eureka AI based on patent content.
Patent Text Reader

Abstract

The invention provides an optical fiber ring scale factor testing method based on distributed optical testing, and belongs to the technical field of optical measurement and optical fiber sensing. The method comprises the following steps: testing an optical fiber ring in a normal temperature state and a rapid temperature change state by using an optical frequency domain reflectometer, and then carrying out self-correlation and cross-correlation demodulation on test signals in the two different temperature states to realize temperature / strain decoupling; after the distributed temperature parameters of the optical fiber ring are stripped, the distributed strain parameters are substituted into a scale factor calculation formula, and then scale factors obtained through calculation are accumulated along the length to obtain the scale factor value of the optical fiber ring under rapid temperature change. According to the invention, quantitative measurement of the scale factor of the fiber-optic gyroscope sensitive ring under rapid temperature change can be realized, and the scale factor of the fiber-optic gyroscope sensitive ring is a core for ensuring angular velocity-signal conversion precision of a gyroscope system and directly determines the reliability of a linear mapping relation between gyroscope output and actual rotation input; the method plays an important role in optimizing the winding process of the fiber-optic gyroscope sensitive ring.
Need to check novelty before this filing date? Find Prior Art