A method and calibration system for measuring and calibrating dynamic error characteristics of fiber optic gyroscope
A technology of dynamic error and fiber optic gyro, which is applied in the direction of measuring devices, instruments, etc., can solve the problems that the speed feedback accuracy of fiber optic gyro or the measurement accuracy of speed stability cannot meet the requirements, etc.
Active Publication Date: 2021-09-14
XI'AN INST OF OPTICS & FINE MECHANICS - CHINESE ACAD OF SCI
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[0003] The purpose of the present invention is to solve the problem that the speed feedback accuracy or speed stability measurement accuracy of the existing fiber optic gyroscope cannot meet the requirements, and to provide a method for measuring and calibrating the dynamic error characteristics of the fiber optic gyroscope and a calibration system
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[0048] The content of the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.
[0049] Such as figure 1 As shown, the present invention provides a system for measuring and calibrating the dynamic error characteristics of a fiber optic gyroscope, which includes a rotating platform 2, a first acceleration sensor 4, a second acceleration sensor 5, a force sensor 7, a fiber optic gyroscope under test 1, and a vibrator 3 and a data processing unit 6; the first acceleration sensor 4 and the second acceleration sensor 5 are respectively arranged on both sides of the rotating platform 2, and the fiber optic gyroscope 1 to be tested is installed in the middle of the rotating platform 2, and is coaxial with the rotating platform 2; The device 3 is connected with the rotary platform 2, and is used to drive the rotary platform 2 to rotate according to the set amplitude-frequency curve; the force sensor 7 is in...
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The invention provides a method for measuring and calibrating the dynamic error characteristics of an optical fiber gyroscope and a calibration system, which solve the problem that the speed feedback accuracy or speed stability measurement accuracy of the existing optical fiber gyroscope cannot meet the requirements. The method includes: Step 1, building a fiber optic gyroscope dynamic error characteristic measurement and calibration system; Step 2, the exciter works, so that the rotating platform rotates according to the set amplitude-frequency curve; Step 3, the data processing unit respectively collects the first acceleration sensor, the second Two acceleration sensors, the data of the fiber optic gyroscope under test and the exciter; Step 4, calculate the angular velocity of the rotating platform according to the data of the first acceleration sensor and the second acceleration sensor; Step 5, calculate the angular velocity output noise of the fiber optic gyroscope under test; Step Sixth, obtain the dynamic error characteristic table of the fiber optic gyroscope under test; step seven, error calibration, calibrate the real-time collected data with the dynamic error characteristic table obtained in step six, and obtain the calibrated angular velocity measurement error value.
Description
technical field [0001] The invention relates to the field of fiber optic gyroscopes, in particular to a method for measuring and calibrating dynamic error characteristics of fiber optic gyroscopes and a calibration system. Background technique [0002] Fiber optic gyroscopes are widely used due to their simple structure, wide angular velocity measurement speed range, high precision, wide bandwidth, fast response speed, and good adaptability to optical fiber all-solid-state environments. Optical theodolite mostly uses fiber optic gyroscope as speed measurement feedback or speed stability measurement reference. Usually, the static parameters of fiber optic gyroscopes are finely calibrated when they leave the factory. However, dynamic characteristics, especially dynamic noise, etc. have not been calibrated. When the fiber optic gyroscope is used for speed stability test and calibration, the raw data collected by the fiber optic gyroscope and the fitting curve are used to make...
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IPC IPC(8): G01C25/00
CPCG01C25/005
Inventor 崔凯刘鹏魏宇高雄郝伟高昕
Owner XI'AN INST OF OPTICS & FINE MECHANICS - CHINESE ACAD OF SCI