An online monitoring method of optical power of interferometric fiber optic gyroscope based on inverse demodulation

Abstract

The invention discloses a novel interferometric optical fiber gyroscope optical power online monitoring method based on inverse demodulation, wherein the inverse demodulation is the reverse process of the angular rate demodulation of the fiber optic The process of accumulating and integrating the rate demodulation value to obtain the inverse demodulation value; after fitting and calibrating the inverse demodulation value, the current optical power information of the fiber optic gyroscope can be obtained. The invention puts forward the concept of inverse demodulation for the first time, eliminates the extra hardware circuit and complex detection program introduced in the traditional power monitoring method, realizes the idea of ​​directly calculating and extracting optical power information in the original gyro circuit system, and achieves a reliable and effective The optimization of the online monitoring method of the state of the space fiber optic gyroscope improves the possibility of further expansion of the space application of the light and small interferometric fiber optic gyroscope.

Description

technical field [0001] The invention belongs to the technical field of fiber optic gyroscopes, and specifically relates to an on-line monitoring method for interference type optical fiber gyroscope optical power based on inverse demodulation. Background technique [0002] Interferometric fiber optic gyroscopes are widely used in military and civilian fields due to their high measurement accuracy, good sensitivity, large dynamic range, small size, light weight, long life, and easy integration. They are used in missile guidance, satellite navigation, attitude control, etc. The orientation plays an important role, and has become a research hotspot all over the world in recent years. Such as figure 1 Shown is a schematic structural diagram of a typical interferometric fiber optic gyroscope, which mainly includes a light source, a beam splitter, a phase modulator, a sensitive fiber optic ring, a detector and a signal processing device. [0003] Different from the fiber optic gy...

AI Technical Summary

Problems solved by technology

These two methods are simple to implement and have high precision. However, with the continuous development of space technology and miniaturized aircraft technology, higher requirements are put forward for the volume, power consumption and weight of space fiber optic gyroscopes. The detection circuit method adds an additional detection circuit, which increases the power consumption, volume and cost of the detection circuit, which does not meet the design requirements of small size and low power consumption for space fiber optic gyroscopes, and the additional effects produced restrict space use. Performance Development of Light and Small Fiber Optic Gyroscope

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