Method for improving zero bias temperature sensitivity of optical fiber gyroscope

Abstract

The invention discloses a method for improving the zero-shift temperature sensibility of an optic-fiber gyro. A sampling channel converts the optic signals from the optic system of the optic-fiber gyro into electric signals, and sends them to the central processor, which after processing outputs rotation signals through a communication interface to outside; between the central processor and the communication interface, a compensator is placed. Based on a zero-shift temperature sensibility model got by measurements beforehand, the zero-shift change caused by temperature can be suppressed only by the compensator without using a huge and complicated temperature controlling equipment and additional power, this eliminates zero-shift change caused by temperature, improves the temperature sensibility of zero shift for the optic-fiber gyro, so that the optic-fiber gyro can be used in wider temperature range, and maintain static performance as like operating under a thermostatic environment. The invention expands the application field of optic-fiber gyros.

Description

technical field [0001] The invention relates to a signal processing method in an optical fiber gyroscope sensor, in particular to a method for improving the performance of the optical fiber gyroscope zero bias temperature sensitivity. Background technique [0002] The fiber optic gyroscope is an angular velocity sensor based on the optical Segneck effect. By detecting the phase of the Segneck light generated by the fiber optic interferometer, the angular velocity of the system, that is, the rotational speed [0003] Due to the non-ideal performance of each component of the fiber optic gyroscope, its comprehensive effect makes the output signal of the fiber optic gyroscope non-zero when the input is zero angular velocity, but has a certain bias. This bias is called the zero bias of the fiber optic gyroscope, or zero bias for short. . The zero bias is caused by many different factors, and it will change with the environment in different application environments. The nature of...

AI Technical Summary

Problems solved by technology

[0005] The temperature sensitivity of the zero bias of the fiber optic gyroscope deteriorates the static index of the fiber optic gyroscope when it is applied in a wide temperature range. A temperature-related error function is superimposed on its output angular velocity signal, which limits its application. The existing technology is to use Additional temperature control system fiber optic gyroscope is used for temperature control to make it work in a quasi-constant temperature environment, but this technology has serious defects, requiring a large volume, huge power consumption, and complex structure temperature control system, in certain volume, weight, power consumption Cannot be used in demanding systems

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