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Rapid testing method for optical fiber gyroscope scale factor parameter

A fiber optic gyroscope and scaling factor technology, applied in the direction of measuring devices, instruments, etc., can solve the problems of easy wear, short life, long life, generally a few minutes to tens of minutes, etc., to achieve small damage, low requirements, and test time short effect

Inactive Publication Date: 2014-09-10
ZHEJIANG UNIV
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Problems solved by technology

The turntable slip ring is one of the key components of the turntable. It is easy to wear and tear during long-term use and has a short life. It needs frequent maintenance and replacement in continuous testing.
In addition, in the test, it is necessary to rotate for a certain time at each test rate point, resulting in a very long test time for the scale factor, generally several minutes to tens of minutes

Method used

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  • Rapid testing method for optical fiber gyroscope scale factor parameter
  • Rapid testing method for optical fiber gyroscope scale factor parameter
  • Rapid testing method for optical fiber gyroscope scale factor parameter

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Embodiment Construction

[0037] The present invention will be further described below in conjunction with the accompanying drawings.

[0038] The present invention adopts following steps:

[0039] 1) if figure 1 As shown, the fiber optic gyroscope 3 is fixedly installed on the turntable 2, and the turntable 2 is controlled to rotate at a sinusoidal angular rate Ω(t)=Ωsin(2πft), and the fiber optic gyroscope 3 follows the turntable 2 to rotate at the same angular rate, where Ω is The magnitude of the sinusoidal angular rate, f is the frequency of the sinusoidal angular rate, and t is the time;

[0040] 2) Collect the output digital quantity of the fiber optic gyroscope 3 and the rotational sine angular rate of the turntable 2, and obtain the output digital quantity F(t) of the fiber optic gyroscope 3 and the rotational sine angular rate Ω(t) of the turntable 2 at different time points t ;

[0041] 3) Perform linear least squares fitting on the output digital quantity F(t) of the fiber optic gyroscope ...

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Abstract

The invention discloses a rapid testing method for optical fiber gyroscope scale factor parameters. The testing method comprises the following steps: fixedly mounting an optical fiber gyroscope on a rotating table and rotating along with the rotating table in an identical sine angle velocity, acquiring to obtain output digital amount of the optical fiber gyroscope and the rotation sine angle velocity of the rotating table at different time points, performing linear least square method fitting, calculating to obtain the optical fiber gyroscope scale factor parameters, testing a plurality of sine angle velocity periods, averaging output digital amounts of the optical fiber gyroscope under the identical sine angle velocity in each sine angle velocity period so as to obtain an average output digital amount of the optical fiber gyroscope under the identical sine angle velocity, and further performing linear least square method fitting to calculate the optical fiber gyroscope scale factor parameters. The testing method is short in testing time, the optical fiber gyroscope scale factor parameters can be rapidly evaluated, the testing equipment is lowly required, no special rotating table adaptive interface line is needed, the testing system is simple and reliable and high in security coefficient, and rapid testing on the optical fiber gyroscope scale factor parameters is achieved.

Description

technical field [0001] The invention relates to a method for testing parameters of an optical fiber gyroscope, in particular to a method for quickly testing the parameters of a fiber optic gyroscope scale factor. Background technique [0002] Fiber optic gyroscope is an important angular rate sensor, which has the advantages of no moving parts, high precision, large dynamic range, shock resistance, etc. It is widely used in the fields of carrier control and inertial navigation. A fiber optic gyroscope is essentially an optical Segneck interferometer, and its working principle is based on the Segneck effect. When the fiber optic gyroscope rotates, a phase difference proportional to the rotation angular rate will be generated inside the interferometer. By detecting this phase difference, the current rotation angular rate of the fiber optic gyroscope can be obtained. [0003] Fiber optic gyroscope is a complex optomechanical system, and the performance of different fiber optic...

Claims

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Application Information

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IPC IPC(8): G01C25/00
CPCG01C25/00
Inventor 李阳陈杏藩舒晓武刘承
Owner ZHEJIANG UNIV
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