Optical fiber loop framework and winding method thereof

Abstract

The invention provides an optical fiber loop framework comprising a framework body the rim of which is provided with an annular groove. A plurality of optical fiber grooves are arranged at the bottom of the groove of the framework body along an optical fiber winding direction; and the distance of the adjacent optical grooves is consistent with the diameter of an optical fiber to be wound. A plurality of positioning bulges and positioning grooves, which are convex and concave alternatively, are arranged on the lateral wall of the framework body along the optical fiber winding direction; and the diameters of the positioning bulges and the positioning grooves are opposite to positions, having equal distanced with the bottom of the groove, on the two lateral walls of the diameter of the optical fiber to be wound in a convex-concave mode. An optical loop winding method using the framework comprises the following steps of: 1) calculating and preparing the optical fiber with enough length and remaining a tail fiber enough; 2) marking the both end points and central point of the optical fiber, and marking symmetrical central points on the outer wall at the right side of the framework; 3) tightly adhering the optical fiber to the inner side of the right wall of the framework, aligning the left and right symmetrical central points of the optical fiber to the symmetrical central points with the symmetrical central point mark on the outer wall of the framework, and winding the optical fiber by using a four-pole symmetrical winding method until the two sections of optical fibers are wound to the respective final points respectively; 4) fixing the tail fiber on the framework; and 5) carrying out later-period curing process.

Description

technical field [0001] The invention relates to an optical fiber gyroscope, in particular to an optical fiber loop skeleton and its winding method. Background technique [0002] Born in 1976, the fiber optic gyroscope is an all-solid-state inertial instrument based on the Sagnac effect. Since its inception, it has attracted the attention of major countries in the world for its outstanding performance characteristics and good application prospects. The strapdown inertial system based on fiber optic gyroscope has many advantages such as high reliability, long life, fast start-up, low power consumption, and relatively simple production process, so it has very important use value and promotion in military equipment and civilian fields. prospect. [0003] Since there are obvious differences between the fiber optic gyroscope and other types of gyroscopes in terms of working principle, structural composition, manufacturing method, performance indicators, testing and evaluation, et...

AI Technical Summary

Problems solved by technology

[0004] The existing method to reduce the temperature sensitivity of the fiber optic gyroscope is to use various symmetrical winding methods with enhanced reciprocity to wind the optical fiber ring with rectangular cross-section on the basis of the rectangular cross-section bearing surface, so that the temperature field and additional thermal stress distribution in the optical fiber are as symmetrical as possible. , For example, in the Chinese invention patent application "A Method for Encircling Optical Fiber" with the publication number CN 102116623 A, the optical fiber gyroscope coil wound by the four-pole symmetrical winding method has shown a better temperature than the original spiral winding method. characteristics, but there is still a gap between the existing four-pole symmetrical winding method and the ideal complete reciprocal four-pole symmetrical winding, because the consistency of the number of turns in each layer cannot be guaranteed in the actual winding process

As shown in the above literature, the rectangular winding surface of the optical fiber ring frame at this stage will cause one of the two adjacent layers to have one more turn than the other, which will affect the reciprocity and the consistency of the winding process.

In addition, the conventional fiber optic ring skeleton is made of aluminum alloy, and direct contact with the metal skeleton will also cause the temperature sensitivity of the fiber optic ring

At present, the main solution is to use the base fiber or other heat insulation materials on the bottom of the frame. The process is complex, and the side of the frame is in direct contact with the fiber, and the temperature sensitivity of the fiber ring cannot be avoided.

[0005] In short, although there are a large number of improved fiber optic loop winding methods to reduce the influence of ambient temperature on the fiber optic gyroscope, these methods are all based on the rectangular winding surface, and cannot fully utilize the quadrupole symmetry and the improved winding method. advantage of law

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