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A Fast Stabilization Method of Fiber Optic Gyroscope Scale Factor

A fiber optic gyroscope and scale factor technology, which is applied to Sagnac effect gyroscopes, measuring devices, instruments, etc., can solve the problem that the fiber optic gyroscope scale factor cannot be quickly stabilized, and achieves a reduction in startup time and gap reduction. Effect

Inactive Publication Date: 2016-03-02
ZHEJIANG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0021] The purpose of the present invention is to overcome the deficiencies of the prior art, aim at the problem that the scale factor of the fiber optic gyroscope cannot be quickly stabilized under high and low temperature conditions, and provide a method for quickly stabilizing the scale factor of the fiber optic gyroscope

Method used

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  • A Fast Stabilization Method of Fiber Optic Gyroscope Scale Factor
  • A Fast Stabilization Method of Fiber Optic Gyroscope Scale Factor
  • A Fast Stabilization Method of Fiber Optic Gyroscope Scale Factor

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Embodiment Construction

[0033] The flow of a method for fast stabilization of the fiber optic gyroscope scale factor is as follows: image 3 As shown, the steps are as follows:

[0034] The steps of the fast stabilization method of the fiber optic gyroscope scale factor are as follows:

[0035] 1) Suppose the operating temperature range of the light source is [T 1 , T 2 ], the temperature range is divided into n segments on average, and the temperature width of each segment is (T 2 -T 1 ) / n;

[0036] 2) Select the arithmetic mean temperature point of the i-th temperature segment as the characteristic temperature point T of the segment i , set the target temperature of the die temperature control of the light source as T i , to test the scale factor K of the fiber optic gyroscope i , and the drive current I when the light source power reaches the desired value at this temperature i , converting all T i , K i and I i Stored in the internal ROM of the fiber optic gyroscope, i=1~n;

[0037] 3...

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Abstract

The invention discloses a rapid stabilization method for scale factors of an optical fiber gyroscope. The method comprises the following steps: equally dividing a light source working temperature range into sections; selecting an arithmetic mean temperature point of each section as a characteristic temperature point of the section; storing driving current and a scale factor of each characteristic temperature point into an inner ROM (Read Only Memory) of the optical fiber gyroscope; when the optical fiber gyroscope is started, setting a target temperature according to an environment temperature and continually setting the driving current of a light source; and when the target temperature and the driving current reach pre-set values, reading the scale factor under the target temperature to enable the optical fiber gyroscope to work. The working temperature of the optical fiber gyroscope is divided into the sections; the target temperature of light source tube core temperature control is set according to the environment temperature when the optical fiber gyroscope is started and the distance between the target temperature of the light source tube core temperature control and the environment temperature is greatly reduced; the temperature of a light source tube core is stabilized in short time; and meanwhile, the driving current is applied to the light source so that the optical fiber gyroscope can rapidly enter a stable working state and the starting time of the optical fiber gyroscope under high-temperature and low-temperature conditions is greatly shortened.

Description

technical field [0001] The invention relates to the field of optical fiber sensing in optoelectronic technology, in particular to a method for quickly stabilizing the scale factor of an optical fiber gyroscope. Background technique [0002] The fiber optic gyro is a sensor sensitive to angular velocity. Its working principle is based on the Sagnac effect, that is, when the ring interferometer rotates, a phase shift proportional to the rotation speed is generated. By detecting the phase shift, the position of the ring interferometer can be obtained. The angular velocity of the system. The relationship between Sagnac phase shift and angular velocity is [0003] [0004] in: [0005] is the Sagnac phase shift in rad; [0006] R is the radius of the fiber ring, in m; [0007] L is the length of the fiber, in m; [0008] c is the speed of light; [0009] Ω is the input angular velocity of the fiber optic gyroscope. [0010] The output of the fiber optic gyroscope is t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01C25/00G01C19/72
CPCG01C19/64G01C25/005
Inventor 胡慧珠薛蕃衍缪立军舒晓武刘承
Owner ZHEJIANG UNIV
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