A Fiber-optic Surrounding Method for Reducing the Start-Up Offset of Fiber Optic Gyroscope

Abstract

The invention belongs to a fiber-optic gyroscope technology, and relates to an optical fiber ring encircling method for reducing a starting zero offset of a fiber-optic gyroscope. The optical fiber ring encircling method comprises the steps of: firstly, analyzing a heat field distribution of the fiber-optic gyroscope on a circuit main board in a starting process, and locating a position with a highest temperature on the main body, wherein correspondingly, an optical fiber ring near the position is influenced by a maximum temperature gradient in a starting process of the gyroscope. A position corresponding to a highest temperature point is marked on an optical fiber ring framework in advance when the optical fiber ring of the gyroscope is started to be encircled, an angle of 0 DEG or 180 DEG is formed between the position in which the encircling is started and the marked position through staggering, and further interaction sites of the highest temperature gradient point on the optical fiber ring are symmetrically distributed along a midpoint of the optical fiber ring, thus the starting zero offset of the gyroscope is reduced, and the starting time of the gyroscope is shortened. Meanwhile, according to the optical fiber ring encircling method, for the determined gyroscope design, the performance of the gyroscope can be improved by only changing the position of a starting point of encircling of the optical fiber ring without changing the original gyroscope; the optical fiber ring encircling method is simple and convenient to operate, and greater in practical application value.

Description

technical field [0001] The invention belongs to the optical fiber gyroscope technology, and relates to an optical fiber wrapping method for reducing the starting zero bias of the optical fiber gyroscope. Background technique [0002] The fiber optic ring, the main component of the fiber optic gyroscope, is easily affected by the external thermal field and causes the drift of the zero bias, which is called the Shupe effect, also known as the thermally induced zero bias of the gyroscope. In the usual gyro structure, the fiber optic ring usually contains light sources, detectors, motherboards and other components. Therefore, during the startup process of the gyroscope, due to the heating of the above-mentioned internal components, a changing temperature gradient distribution is formed in the fiber optic ring, causing the gyroscope to start. The change of the neutral bias is called the starting bias of the gyro. At present, the main technical means to solve this problem is to u...

AI Technical Summary

Problems solved by technology

As a result, when the gyro is started, the heat at local locations on the main board rises rapidly, and this heat field is not evenly distributed on the entire fiber ring layer, so this situation makes the temperature gradient of the fiber ring at local locations change rapidly, causing the gyro The start-up zero bias is too large, which also prolongs the start-up time of the gyro

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