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Method for temperature compensation of fiber optic gyroscope

A fiber optic gyroscope, temperature compensation technology, applied in the direction of gyro effect for speed measurement, Sagnac effect gyroscope, speed/acceleration/shock measurement, etc. question

Active Publication Date: 2012-06-27
BEIJING SANCHI TECHNOOGY DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this way, even if the measured object does not rotate, there is a phase difference between the reciprocal light due to temperature changes, which introduces errors and severely limits the accuracy of the fiber optic gyroscope
At present, in China, the temperature compensation circuit is often used to solve this problem. However, due to the influence of the hardware after the temperature compensation circuit is added, the start-up time of the fiber optic gyroscope is longer, and most of the domestic ones can enter the working state in about 2 seconds.

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  • Method for temperature compensation of fiber optic gyroscope
  • Method for temperature compensation of fiber optic gyroscope

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Embodiment Construction

[0027] The embodiment of the present invention considers that the position space of the heading and attitude system is limited, and the power consumption is low, and adopts the single bus chip digital thermometer (1-WireDigital Thermometer) DS18B20 that Dallas Semiconductor Company releases, as figure 2 As shown, DS18B20 is a one-wire device. The efficient realization of the method of the present invention is inseparable from its implementation on a high-efficiency computer platform. In this embodiment, in order to significantly improve the performance of the fiber optic gyroscope, as the master device for data communication with DS18B20, such as image 3 As shown, the navigation computer with DSP plus FPGA structure is adopted, that is, DSP is used as the processor for navigation algorithm and heading system control, and a large-capacity FPGA integrates all I / O functions of the system. High-speed floating-point DSP chip is used for calculation and attitude system control, a...

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Abstract

The invention provides a method for temperature compensation of a fiber optic gyroscope, which comprises the following steps: measuring and collecting the temperature value of a fiber optic gyroscope; substituting the temperature value into the correcting calculations of the angular velocities of the X axis, the Y axis, and the Z axis of the fiber optic gyroscope to obtain an angular velocity correction value of each axis; calculating the respective temperature compensation value of the X axis, the Y axis, and the Z axis of the fiber optic gyroscope based on the angular velocity correction value of each axis. Therefore, the starting time of the fiber optic gyroscope is shortened.

Description

technical field [0001] The invention relates to a method for temperature compensation of the output precision of an optical fiber gyroscope. Background technique [0002] As a new type of angular velocity sensor based on the Sagnac effect, the fiber optic gyroscope is a pure optical, static gyroscope, which is essentially out of the scope of the rotor gyroscope. It has an all-solid-state structure without rotating parts, high reliability, and Strong impact and anti-acceleration ability, short start-up time, wide dynamic range, low power consumption, small size, light weight and other advantages. With the maturity of various key technologies, fiber optic gyroscope, as an important angular rate sensor, plays a key role in many fields such as missile control, aircraft navigation, and geodetic surveying. [0003] The accuracy of fiber optic gyroscopes is easily limited by many environmental factors, the most important of which is the thermal non-reciprocal effect due to tempera...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01C19/72G01P9/00
Inventor 张宪龙
Owner BEIJING SANCHI TECHNOOGY DEV