Test positioning method and device for thermal center of optical fiber ring

Abstract

The invention discloses a test positioning method and device for the thermal center of an optical fiber ring and belongs to the technical field of the performance testing of optical fiber gyroscopes.According to the test positioning method and device of the invention, a plurality of position points are marked on an optical fiber ring; the plurality of position points are heated; the zero offset change data of an optical fiber gyroscope during the heating of each position point are acquired; the zero offset change range of each position point during heating is obtained according to the zero offset change data of each position point; the position point corresponding to the minimum value of the zero offset change range is the thermal center of the optical fiber ring, namely, the position point of the optical fiber center on the optical fiber ring. The test positioning method has the advantages of directness, high effectiveness, simple operation, high test positioning precision and no need for expensive equipment. With the test positioning method adopted, test positioning cost is reduced, and important support is provided for the overall thermal field layout analysis of the fiber-optic gyroscope.

Description

technical field [0001] The invention belongs to the technical field of fiber optic gyroscope performance testing, and in particular relates to a method and device for testing and locating the thermal center of an optical fiber ring wound by a quadrupole of the fiber optic gyroscope. Background technique [0002] With the development and progress of a large number of applications of fiber optic gyroscopes, the improvement of the comprehensive performance of fiber optic gyroscopes has become an important hotspot in the current research of fiber optic gyroscopes. Among them, the stability of the optical fiber ring has become one of the important research hotspots. [0003] The stability of the fiber optic gyroscope, that is, the fiber optic gyroscope has good zero bias stability at room temperature or certain fixed-point temperature environments. Previous studies have shown that the bias stability of FOG is most affected by the stability of optical components, especially the f...

AI Technical Summary

Problems solved by technology

[0004] There are two existing methods for testing and positioning the midpoint of the optical fiber: one is to set a mark at the midpoint of the fiber before winding, and find the midpoint of the fiber through the mark after the winding is completed. Although this method is simple, the winding of the fiber If there are too many, the mark or center may be covered and it is difficult to find; another method is to use the optical system to perform distributed polarization detection and distributed strain detection on the fiber ring to determine the center of the fiber. This method is complex, the system is expensive, and the test location high cost

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