Closed loop fiber optic gyroscope scale factor high precision calibrating method

A fiber optic gyroscope and scaling factor technology, which is applied in measurement devices, instruments, etc., can solve a large number of human and material problems, and achieve the effects of high precision, simple method and great practical application value.

Active Publication Date: 2015-06-17
FLIGHT AUTOMATIC CONTROL RES INST
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] In addition, due to the limitation of technology level, the scaling factor of high-precision fiber optic gyroscope changes with temperature is no longer a simple piecewise linear relationship
If the fixed-point constant

Method used

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  • Closed loop fiber optic gyroscope scale factor high precision calibrating method
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  • Closed loop fiber optic gyroscope scale factor high precision calibrating method

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Embodiment Construction

[0028] Below in conjunction with accompanying drawing, the present invention will be further described:

[0029] The high-precision calibration method of the closed-loop optical fiber gyro scaling factor of the present invention fixes the product on the turntable table with a temperature box, and after the temperature of the temperature box is kept for a period of time, the product is powered on for testing, and a constant angular rate is input through the turntable, and the temperature of the temperature box is changed at the same time , using the variable temperature method to obtain the calibration curve of the closed-loop fiber optic gyroscope scale factor changing point by point with temperature.

[0030] The specific implementation steps of the method for calibrating the scale factor of the closed-loop fiber optic gyroscope of the present invention are as follows:

[0031] 1. Calibration test preparation

[0032] The fiber optic gyroscope is fixed on a single-axis rate...

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PUM

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Abstract

The invention belongs to a fiber optical gyroscope, and relates to a closed loop fiber optic gyroscope scale factor high precision calibrating method. The closed loop fiber optic gyroscope scale factor high precision calibrating method comprises the following steps: fixing a product on the surface of a rotary table with an incubator, maintaining the temperature of the incubator for a period of time, carrying out power-on test on the product, inputting a constant angle rate through the rotary table, changing the temperature of the incubator, and using a variable temperature technology to obtain a calibration curve of point-to-point variation of a closed loop fiber optic gyroscope scale factor with the temperature. The method has the advantages of simple operation, low cost, high precision and large practical application values.

Description

technical field [0001] The invention belongs to the optical fiber gyroscope technology, and relates to a high-precision calibration method for the scale factor of a closed-loop optical fiber gyroscope. Background technique [0002] The fiber optic gyroscope scale factor is defined as the ratio of the gyroscope output to the input angular rate, which is one of the important performance indicators of the fiber optic gyroscope as an angular rate sensor. The temperature stability of the scale factor is an important index to measure the environmental adaptability of the gyroscope. Compared with the laser gyroscope, the temperature stability of the scale factor of the closed-loop fiber optic gyroscope is poor. This index seriously restricts the application of the closed-loop fiber optic gyroscope in the field of inertial navigation, and it is a difficult problem that must be overcome. [0003] The temperature stability of the scale factor of the closed-loop fiber optic gyroscope ...

Claims

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Application Information

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IPC IPC(8): G01C25/00
CPCG01C25/00
Inventor 田振谢良平
Owner FLIGHT AUTOMATIC CONTROL RES INST
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