Equipment and method for measuring decoupling factor of optical fiber gyro

Abstract

The invention provides equipment and a method for measuring a decoupling factor of an optical fiber gyro. The measuring equipment comprises a laser, a measuring device, a rotary platform moving acquisition card, a 485 interface, a data analysis system, an image acquisition card, a high-speed camera and a projection screen. The measuring method comprises the following steps that: based on the fact that laser emitted by the laser is reflected when projected onto the equipment to be measured and the fact that the reflected light forms a tiny round spot on the screen, the high-speed camera acquires the moving track image of the round spot on the screen in real time and sends the image to the data analysis system of a computer; and when the equipment to be measured moves along an azimuth axis and a pitch axis, the light spot forms the moving track, corresponding to moving parameters and a moving precision of the equipment to be measured, on the screen, by dividing, identifying and tracking the light spot of the acquired high-speed image sequence, the data analysis system of the computer fits the moving curve of the round spot in the time direction, and calculates moving information based on the fitting curve. The equipment has the advantages of being easily and conveniently operated and effectively overcoming defects existing in the conventional method.

Description

technical field [0001] The invention relates to equipment and a dynamic testing method for testing the decoupling coefficient of an optical fiber gyroscope, in particular to a device and a testing method for testing the decoupling coefficient of an optical fiber gyroscope through high-speed image acquisition, image moving target recognition, and target tracking. Background technique [0002] The fiber optic gyroscope is a core device of an inertial navigation system, which determines the working accuracy of the inertial system. With the advancement of science and technology, fiber optic gyroscopes with low cost, small size and low power consumption have been widely used in the guidance systems of micro-systems and tactical weapons, and are important low-precision angular velocity sensors. [0003] The traditional method is to use a scale to manually measure the displacement of the fiber optic gyroscope before and after the closed loop. The decoupling accuracy is equal to the...

AI Technical Summary

Problems solved by technology

The traditional method of measuring the decoupling coefficient of the fiber optic gyroscope has poor measurement accuracy. It is a static approximate measurement method and cannot measure the instantaneous decoupling accuracy of the fiber optic gyroscope during its operation.

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