Title:
EIGENFREQUENCY COMPENSATION METHOD FOR ULTRAHIGH-PRECISION FIBER-OPTIC GYROSCOPE, AND FAULT DIAGNOSIS AND PROCESSING METHOD THEREFOR
Document Type and Number:
WIPO Patent Application WO/2024/051050
Kind Code:
A1
Abstract:
An eigenfrequency compensation method for an ultrahigh-precision fiber-optic gyroscope, and a fault diagnosis and processing method therefor. The eigenfrequency compensation method comprises the following steps: performing open-loop processing on a gyroscope; preheating a warm box; connecting a Y waveguide to a signal generator, so that the signal generator emits a square wave signal of a variable frequency, and enabling a detector to output a peak pulse; adjusting the frequency of the square wave signal, so that the peak pulse outputted by the detector is the narrowest; adjusting the temperature of the warm box, measuring the eigenfrequency of the gyroscope at each predetermined temperature point, and calculating corresponding coefficients; and performing closed-loop processing on the gyroscope, disconnecting the Y waveguide from the signal generator, applying temperature to the warm box, looking up the eigenfrequency or calculating the eigenfrequency by means of a modulation and demodulation circuit, and feeding the eigenfrequency back to the Y waveguide to perform frequency compensation on the output of the gyroscope. The eigenfrequency compensation method for an ultrahigh-precision fiber-optic gyroscope, and the fault diagnosis and processing method therefor can ensure precision requirements of ultrahigh-precision fiber-optic gyroscopes, and can quickly diagnose and process faults.
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Inventors:
ZUO WENLONG (CN)
ZHANG HAIBIN (CN)
YAN MIAO (CN)
LI DI (CN)
WU XIAOLE (CN)
ZHANG HAIBIN (CN)
YAN MIAO (CN)
LI DI (CN)
WU XIAOLE (CN)
Application Number:
PCT/CN2022/143150
Publication Date:
March 14, 2024
Filing Date:
December 29, 2022
Export Citation:
Assignee:
CHINA STATE SHIPBUILDING CORP NO 707 RES INST (CN)
International Classes:
G01C25/00; G01C19/72
Foreign References:
| CN115143949A | 2022-10-04 | |||
| CN109724582A | 2019-05-07 | |||
| CN102840869A | 2012-12-26 | |||
| CN101408425A | 2009-04-15 | |||
| CN113310483A | 2021-08-27 | |||
| US20040233456A1 | 2004-11-25 | |||
| CN105758421A | 2016-07-13 |
Attorney, Agent or Firm:
BEIJING SANYOU INTELLECTUAL PROPERTY AGENCY LTD. (CN)
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