Method and system for testing nonlinearity degree of closed-loop feedback circuit of fiber-optic gyroscope

A closed-loop feedback, non-linear technology, applied in the field of communication

Active Publication Date: 2018-12-18
HENGYANG ZHIGU TECH DEV CO LTD
View PDF6 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] Embodiments of the present invention provide a method and system for testing the nonlinearity of the fiber optic gyr...

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method and system for testing nonlinearity degree of closed-loop feedback circuit of fiber-optic gyroscope
  • Method and system for testing nonlinearity degree of closed-loop feedback circuit of fiber-optic gyroscope
  • Method and system for testing nonlinearity degree of closed-loop feedback circuit of fiber-optic gyroscope

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0037] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Apparently, the described embodiments are part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0038] see figure 1 and figure 2 , figure 1 It is a flow chart of a fiber optic gyroscope closed-loop feedback loop non-linearity testing method provided by an embodiment of the present invention, figure 2 It is a hardware structure diagram of a fiber optic gyroscope, which includes a digital signal processing chip, a Y waveguide phase modulator, a photodetector, a digital-to-analog converter, a modulated wave drive circuit, an optical fiber ring, a pre...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention provides a method and a system for testing the nonlinearity degree of a closed-loop feedback circuit of a fiber-optic gyroscope. The method comprises the steps that a digital signal processing chip generates a modulation voltage signal, and the modulation voltage signal is output to a Y waveguide phase modulator through a digital-to-analog converter and a modulation wave driving circuit, wherein the modulation voltage signal is a superposed signal of a nonlinear excitation modulation wave signal and a fixed step wave signal; the Y waveguide phase modulator is used for convertingthe modulation voltage signal into a modulation phase signal to obtain a modulation phase difference; a photoelectric detector detects the modulation phase difference, and the modulation phase difference is output to the digital signal processing chip through a preamplifier and an analog-to-digital converter; the digital signal processing chip calculates and outputs a first demodulation value according to the modulation phase difference; and a determination module determines the nonlinear degree of a modulation coefficient of the closed-loop feedback circuit according to the first demodulationvalue. The closed-loop test of the fiber-optic gyroscope is realized, so that the accuracy of the nonlinearity test of the feedback circuit is improved.

Description

technical field [0001] The invention relates to the field of communication technology, in particular to a method and system for testing the nonlinearity of a fiber optic gyroscope closed-loop feedback loop. Background technique [0002] As an inertial angular velocity sensor based on the Sagnac effect, the fiber optic gyroscope is widely used in the field of inertial measurement due to its unique technical and performance advantages. [0003] At present, fiber optic gyroscopes generally adopt closed-loop feedback methods to improve their sensitivity, stability, dynamic range and linearity of scale factors. The feedback loop includes three key components: a digital-to-analog converter (DAC), a modulating wave driver circuit (op amp), and an integrated optical modulator (Y-waveguide phase modulator). The DAC converts the digital signal into an analog current signal, and converts it into a voltage signal through a modulated wave drive circuit. The output of the drive circuit i...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): G01C19/72G01C25/00
CPCG01C19/726G01C25/005
Inventor 张春熹孟照奎郑月王心
Owner HENGYANG ZHIGU TECH DEV CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap