Fiber-optic gyroscope with optical power self-checking function

Abstract

The invention relates to a fiber-optic gyroscope with an optical power self-checking function, which comprises a light source, a coupler, a Y waveguide and a fiber-optic ring which are connected in sequence, and further comprises a detector, a reference voltage module, a pre-amplification circuit, an AD conversion module, a processor, a DA conversion module, a post-amplification circuit and a power supply for supplying power to the whole fiber-optic gyroscope, the detector is connected with the coupler, the detector and the reference voltage module are both connected with the pre-amplification circuit, and the pre-amplification circuit, the AD conversion module, the processor, the DA conversion module, the post-amplification circuit and the Y waveguide are connected in sequence. Compared with the prior art, the fiber-optic gyroscope not only realizes the function of measuring the angular rate of the fiber-optic gyroscope, but also realizes the function of real-time self-inspection in normal operation of the gyroscope, and has the advantages of early fault discovery, high accuracy and the like.

Description

technical field [0001] The invention relates to the field of optical fiber gyroscopes, in particular to an optical fiber gyroscope with an optical power self-inspection function. Background technique [0002] Gyroscope is an angular rate sensor, a device sensitive to angular motion in relative inertial space, and is currently the main sensor used to determine the spatial motion attitude of moving objects. It can be applied to various fields of sea, land, air and sky. The basic function of the traditional fiber optic gyroscope is to measure the angular rate, and it does not have the function of optical power self-test. Some fiber optic gyroscopes have a power-on self-test function, but the power-on self-test is only applicable to the moment of starting up, and cannot be self-tested in real time during work. Moreover, the power-on self-test will reduce the start-up time, which is not suitable for the application environment requiring fast start-up, and cannot solve the probl...

AI Technical Summary

Problems solved by technology

Some fiber optic gyroscopes have a power-on self-test function, but the power-on self-test is only applicable to the moment of power-on and start-up, and cannot perform real-time self-test during work

And the power-on self-test will reduce the start-up time, which is not suitable for the application environment that requires fast start-up, and cannot solve the problem of accurate measurement of optical power

In practical applications, as the core sensor of attitude control and inertial navigation, an instantaneous failure will bring disaster consequences and cause huge losses

In the launch of rockets and satellites, there have been many launch failures or launch delays caused by fiber optic gyro failures

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