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Optical power self-correction method for fiber-optic gyroscope and high-precision fiber-optic gyroscope using same

A fiber optic gyroscope and optical power technology, which is applied to Sagnac effect gyroscopes, measuring devices, instruments, etc., can solve the problems of high cost of high-precision fiber optic gyroscopes, inaccurate optical power control, etc., to avoid Shupe errors and improve Stability and the effect of reducing production cost

Active Publication Date: 2015-01-21
THE GENERAL DESIGNING INST OF HUBEI SPACE TECH ACAD
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Problems solved by technology

[0005] The purpose of the present invention is to overcome the problems of high cost and inaccurate optical power control of high-precision fiber optic gyroscopes in the prior art, and provide a method for self-correcting optical power of fiber optic gyroscopes and its high-precision fiber optic gyroscope

Method used

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  • Optical power self-correction method for fiber-optic gyroscope and high-precision fiber-optic gyroscope using same
  • Optical power self-correction method for fiber-optic gyroscope and high-precision fiber-optic gyroscope using same
  • Optical power self-correction method for fiber-optic gyroscope and high-precision fiber-optic gyroscope using same

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Embodiment Construction

[0021] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0022] figure 1 The block diagram of the high-precision fiber optic gyro control based on the ASE light source shown has been explained in the background technology, and will not be repeated here.

[0023] Such as figure 2 As shown, this embodiment provides a low-cost high-precision fiber optic gyroscope with optical power self-correction function, which includes a gyroscope body 1, a light source 102 and a light source control unit 101 are arranged in the gyroscope body 1, and the light source 102 is sequentially connected and coupled 103, integrated optical modulator 104, fiber ring 111 and photodetector (PIN) 105 form an optical path, photodetector 105 and preamplifier 106 are electrically connected, preamplifier 106 and AD converter 107, digital signal processing unit ( FPGA) 108, post-amplifier 109, DA converter 110 form a cir...

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Abstract

The invention discloses an optical power self-correction method for a fiber-optic gyroscope and a high-precision fiber-optic gyroscope using the method. The method comprises the following steps: extracting optical interference signals, collecting comb-type peak values Di when a bias phase position in the optical interference signals is close to 0, integrating the collected N comb-type peak values Di to obtain Dint, comparing Dint with the optical power value of a fiber-optic gyroscope working stably, and controlling power source driving current according to the comparison value so as to further adjust the output optical power of a light source. By the method, on the conditions that no extra device is use and reciprocity of light paths is not changed, the optical power of the light source is detected in an end-to-end manner, closed-loop control is implemented so as to realize the high-precision control on a low-cost SLD (super luminescent diode) light source, and the stability of output wavelength is improved. The high-precision fiber-optic gyroscope using the method does not need an expensive ASE (amplified spontaneous emission) light source, thereby greatly reducing the production cost.

Description

technical field [0001] The invention relates to the technical field of fiber optic gyroscopes, in particular to an optical power self-correction method of a fiber optic gyroscope and a high-precision fiber optic gyroscope. Background technique [0002] In recent years, fiber optic gyroscope (FOG) has attracted much attention due to its potential advantages and application prospects, and has become the first choice in the new generation of medium and high precision inertial measurement systems. With the deepening of research, various key issues affecting the accuracy of fiber optic gyroscopes have been gradually solved, and the performance of fiber optic gyroscopes has been continuously improved, creating good economic benefits. Medium and low-precision fiber optic gyroscopes are mainly used in short-distance tactical weapons, civilian logging technology and other fields, and high-precision fiber optic gyroscopes are mainly used in long-distance, high-precision weaponry syste...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01C25/00G01C19/72
Inventor 袁慧铮李星善陆俊清邵志浩刘源远杨道安
Owner THE GENERAL DESIGNING INST OF HUBEI SPACE TECH ACAD
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