Elliptical fiber ring skeleton for fiber gyroscope

Abstract

The invention provides an elliptical fiber ring skeleton for a fiber gyroscope. The elliptical fiber ring skeleton comprises a fiber ring skeleton, wherein the fiber ring skeleton is of an H-shaped elliptical ring structure; the elliptical outer wall of the middle of the fiber ring skeleton is a fiber winding ring surface; the upper end surface of the fiber ring skeleton is a fiber coiling surface and two fiber outlet spiral grooves of which the positions are mutually symmetrical are formed in the fiber coiling surface; a fiber is wound on the fiber winding ring surface according to a quadrupole symmetric method and two ends of the fiber are gummed and coiled on the fiber coiling surface through the fiber outlet spiral grooves separately; a top edge boss for preventing the fiber from being separated from the fiber ring skeleton is formed in the fiber coiling surface; and a small optical device is arranged in a central elliptical hole of the fiber ring skeleton and a tail fiber of the small optical device is coiled on the fiber coiling surface. The small optical device is arranged in the central elliptical hole of the fiber ring skeleton according to the size of the small optical device, so that stress distribution of a fiber ring is relatively uniform while the space utilization ratio is improved, the fiber ring winding difficulty is reduced, the structure is compact and the fiber ring is easy to wind.

Description

technical field [0001] The invention belongs to the technical field of fiber optic gyroscopes, and in particular relates to an elliptical fiber optic ring frame used for fiber optic gyroscopes. Background technique [0002] The fiber optic gyroscope is a new type of inertial device, which is based on the Sagnac effect of light, and the fiber optic ring is a component used in the fiber optic gyroscope to sense the Sagnac phase difference between two beams of opposite light waves caused by the input angular velocity. With the movement of the carrier, Light propagates in two different directions in the fiber optic ring, and the resulting optical path difference realizes the function of the gyroscope through digital demodulation of the circuit. In addition, as the key component of the fiber optic gyroscope, the skeleton of the fiber optic ring not only plays a supporting role, but also directly affects The design of the disk installation and the overall structure of the optical ...

AI Technical Summary

Problems solved by technology

[0002] The fiber optic gyroscope is a new type of inertial device, which is based on the Sagnac effect of light, and the fiber optic ring is a component used in the fiber optic gyroscope to sense the Sagnac phase difference between two beams of opposite light waves caused by the input angular velocity. With the movement of the carrier, Light propagates in two different directions in the fiber optic ring, and the resulting optical path difference realizes the function of the gyroscope through digital demodulation of the circuit. In addition, as the key component of the fiber optic gyroscope, the skeleton of the fiber optic ring not only plays a supporting role, but also directly affects The design of the disk installation and the overall structure of the optical system, especially for the requirements of the miniaturized fiber optic gyroscope for the fiber ring skeleton, firstly use small optical devices (such as light source, coupler, Y waveguide, detectors are all cuboid, and the pigtails are all in the same direction) Long side direction), carry out the layout of the skeleton structure of the optical fiber ring, and there are pigtails in the optical device, and the bending transition of the pigtail coil must be considered. The bending radius is more than 10mm. Usually, the optical fiber ring is built on the basis of a circular skeleton. For the design, the fiber optic ring is designed with a racetrack-shaped skeleton abroad. For a circular fiber optic ring skeleton, the size of the fiber optic gyro is relatively large; In the part of the fiber optic gyroscope, the optical fiber cannot be close to the ring surface, resulting in uneven stress distribution of the fiber optic ring, causing the performance of the fiber optic gyroscope to decline. Therefore, it is necessary to improve

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