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Temperature Compensation Method of Fiber Optic Gyroscope Inclinometer

A fiber optic gyroscope and fiber optic gyroscope technology, applied in the field of temperature compensation, can solve the problems of reading errors, azimuth angle ψ measurement errors, etc., and achieve the effect of eliminating influence and improving measurement accuracy

Active Publication Date: 2017-09-08
WUXI WITLINK INFORMATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0031] However, since the scaling factor of the fiber optic gyroscope varies with temperature, at different temperatures ω x and ω y There will be errors in the readings, resulting in a larger error in the measurement of the azimuth ψ

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  • Temperature Compensation Method of Fiber Optic Gyroscope Inclinometer
  • Temperature Compensation Method of Fiber Optic Gyroscope Inclinometer
  • Temperature Compensation Method of Fiber Optic Gyroscope Inclinometer

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Embodiment Construction

[0067] The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0068] see Figure 1 to Figure 2 , the fiber optic gyro inclinometer comprises a body 1, the body is provided with a fiber optic gyroscope 2 and an acceleration sensor 3, and the temperature compensation method of the fiber optic gyro inclinometer of a preferred embodiment of the present invention comprises the following steps:

[0069] S1: Rotate the fiber optic gyroscope and acceleration sensor along the main axis of the fiber optic gyroscope inclinometer, each rotation is 90°, and the sensor readings in four directions are obtained, respectively g x+ , g x- , g y+ , g y- ; x+ , ω x- , ω x+ , ω x- . The magnitude of the acceleration and the earth's rotation in t...

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Abstract

The invention relates to a temperature compensation method of a fiber optic gyroscope inclinometer. According to the temperature compensation method of the fiber optic gyroscope inclinometer, a scaling factor of the current fiber optic gyroscope can be determined according to the projection of the autorotation of earth on a horizontal plane and a reading of the fiber optic gyroscope in the horizontal plane, and then readings of an acceleration sensor and the fiber optic gyroscope are corrected, so that the influence of the scaling factor of the fiber optic gyroscope varied along with the temperature on a measurement result can be eliminated, and the measurement precision of the fiber optic gyroscope inclinometer can be improved.

Description

technical field [0001] The invention relates to a temperature compensation method, in particular to a temperature compensation method for an optical fiber gyroscope inclinometer. Background technique [0002] A fiber optic gyroscope is a new type of all-solid-state fiber optic sensor without a mechanical rotor, which is used to measure the rotational angular velocity of an object. Because of its high precision, strong shock and vibration resistance, and easy design and manufacture, it is now more and more widely used in north-seeking and orientation fields such as north-finders, theodolites, and inclinometers. [0003] The fiber optic gyro inclinometer is an instrument that uses fiber optic gyroscopes, acceleration sensors and other components as sensing elements to determine the direction of borehole inclination by measuring the earth's rotation angular velocity vector. [0004] The fiber optic gyroscope is sensitive to temperature. When the temperature changes, the scale ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01C19/72
CPCG01C19/72
Inventor 万放伍刚伍佑明
Owner WUXI WITLINK INFORMATION