A fiber optic gyroscope with online fault self-diagnosis function

Abstract

The invention discloses an optical fiber gyroscope with an online fault self-inspection function. In the detection circuit, the photoelectric detector 1 signal amplification and the ADC sampling circuit perform power detection, voltage conversion and data sampling on the Sagnac interference light signal, and real-time demodulation of the photoelectric detection 1 signal, continuously obtain Sagnac phase difference information and phase closed-loop state information, photodetector 2 signal amplification and ADC sampling circuit perform power detection, voltage conversion and data sampling on the original optical signal of the light source, through real-time monitoring of photodetection The signal of device 2 can continuously obtain the real-time value of the optical power of the light source and the information of the fluctuation amplitude. It can realize online real-time self-inspection of the working status of the fiber optic gyroscope, and automatically analyze whether the fiber optic gyroscope is working normally or abnormally. risk of adverse effects.

Description

technical field [0001] The invention belongs to the technical field of optical fiber gyroscope preparation, in particular to an optical fiber gyroscope with an online fault self-checking function. Background technique [0002] Fiber optic gyro (FOG) is a new type of all-solid-state angular velocity measurement device based on the Sagnac effect, because of its high precision, large range, small size, light weight, low cost, long life, high integration, and low engineering difficulty. It is widely used in military fields such as aviation, aerospace, and navigation due to its advantages, and is one of the important components in the field of inertial technology. Over the years, experts and scholars at home and abroad have conducted in-depth research on the accuracy, range, temperature drift, dynamic response and other indicators of fiber optic gyroscopes, and achieved a lot of results. However, there are relatively few studies on the reliability of fiber optic gyroscopes. The ...

AI Technical Summary

Problems solved by technology

Over the years, experts and scholars at home and abroad have conducted in-depth research on the accuracy, range, temperature drift, dynamic response and other indicators of fiber optic gyroscopes, and achieved a lot of results. However, there are relatively few studies on the reliability of fiber optic gyroscopes. The gyroscope works normally at any time, and the fiber optic gyroscope cannot automatically alarm when it fails to work

This brings huge risks to the inertial system that uses the fiber optic gyroscope as the angular velocity and angle sensor. The inertial system cannot identify the working status of the fiber optic gyroscope in time. Once the fiber optic gyroscope outputs wrong data, it may cause the inertial system to work abnormally or even collapse.

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