Combined type fiber loop framework for fiber-optic gyroscope

Abstract

The invention provides a combined type fiber loop framework for a fiber-optic gyroscope. The combined type fiber loop framework is provided with an internal fiber loop framework body, an external fiber loop framework body and a mounting plate. The internal fiber loop framework body and the external fiber framework body are both of I-shaped loop structures, and the lower end face of the internal fiber loop framework body is fixed to the mounting plate. An optical fiber winding loop face I and an optical fiber winding loop face II are both provided with optical fibers wound in a quadrupolar symmetry mode, and gluing discs at the two optical fiber outlet ends of the optical fiber on each of the optical fiber winding loop face I and the optical fiber winding loop face II are mounted on the optical fiber winding loop face I and the optical fiber winding loop face. The internal fiber loop framework body is embedded into a center hole of the external fiber loop framework body, and the lower end of the external fiber loop framework body is fixed to the mounting plate. The high-precision fiber loop winding length is distributed to the internal fiber loop framework body and the external fiber loop framework body, the number of winding turns is reduced, the winding difficulty for staff is lowered, and the yield is increased; meanwhile, quadrupolar symmetry optical fiber winding is adopted, so that the influence of the temperature gradient effect on the performance of the fiber-optic gyroscope is effectively reduced, the vibration performance of the fiber-optic gyroscope is improved, the structure is simple, and operation is easy.

Description

technical field [0001] The invention belongs to the technical field of fiber optic gyroscopes, and in particular relates to a combined 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. 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. It directly affects the performance of the fiber optic gyroscope. With the movement of the carrier, the light propagates in two different directions in the fiber optic ring, and the formed optical path difference realizes the function of the gyroscope through digital demodulation of the circuit. In addition, the fiber optic ring is the key to the fiber optic gyroscope. Components, whose skeleton not only plays a supporting role, but also directly affects the disk install...

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. It directly affects the performance of the fiber optic gyroscope. With the movement of the carrier, the light propagates in two different directions in the fiber optic ring, and the formed optical path difference realizes the function of the gyroscope through digital demodulation of the circuit. In addition, the fiber optic ring is the key to the fiber optic gyroscope. The skeleton of the component not only plays a supporting role, but also directly affects the disk installation and overall structural design of the optical system. Therefore, the design of the fiber optic ring skeleton directly determines the reliability of the performance of the fiber optic gyroscope. Especially for high-precision fiber optic gyroscopes, usually winding The length of the optical fiber is more than 1km. As the number of winding turns increases, it will bring great difficulties to the winding personnel under the premise of ensuring the overall arrangement, no climbing layer, and consistent stress. At the same time, the qualified rate of the optical fiber ring will decrease and the cost will increase. Second, due to the increase in the number of winding layers, the radial temperature gradient effect of the fiber optic ring increases, thereby affecting the temperature performance of the fiber optic gyroscope; finally, the design of the fiber optic ring skeleton may cause the height of the fiber optic gyroscope to increase, causing the center of mass to rise, while The fiber optic gyro is generally fixed on the base by screws, which affects its vibration, so it is necessary to improve

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