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A Fiber Optic Gyroscope with High Reliability and Time Division Multiplexing

A technology of time-division multiplexing and fiber optic gyroscope, which is applied in the direction of Sagnac effect gyroscopes, etc., can solve the problems of gyroscope machine failure and task failure, and achieve the effects of simplified structure, extended service life and low power consumption

Active Publication Date: 2021-11-09
BEIHANG UNIV
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Problems solved by technology

The failure or performance degradation of these devices will inevitably lead to the failure of the gyroscope, resulting in mission failure.
[0004] Therefore, from the perspective of reliability, the traditional time-division multiplexing fiber optic gyroscope still has certain limitations in the application of satellite space missions

Method used

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  • A Fiber Optic Gyroscope with High Reliability and Time Division Multiplexing
  • A Fiber Optic Gyroscope with High Reliability and Time Division Multiplexing
  • A Fiber Optic Gyroscope with High Reliability and Time Division Multiplexing

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Embodiment Construction

[0035] 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. Obviously, the described embodiments are only for illustration and are not intended to limit the present invention.

[0036] The present invention provides a high-reliability configuration time-division multiplexing fiber optic gyroscope, such as figure 2 As shown, including: first light source 1, second light source 2, first detector 3, second detector 4, coupler 5, X sensitive axis 6, Y sensitive axis 7, Z sensitive axis 8, S sensitive axis 9 , a first signal processing circuit 10, a second signal processing circuit 11, a first light source driving circuit 12 and a second light source driving circuit 13; wherein,

[0037] Specifically, the coupler 5 can be a 4×4 coupler; the first light source 1, the second light source 2, the first detector 3 and the second detect...

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Abstract

The invention discloses a time-division multiplexing optical fiber gyroscope with high reliability configuration, adopts time-division multiplexing technology, multi-axis shared light source driving circuit, light source, detector and signal processing circuit, and has the advantages of light weight, small volume and low power consumption. The advantages. The four-axis redundant configuration scheme is adopted, which can allow a sensitive axis to fail without affecting the normal operation of the fiber optic gyroscope. The dual light source drive circuit, dual light source, dual detector and dual signal processing circuit scheme is adopted to eliminate the weak link of the fiber optic gyroscope system. Redundant design is carried out with optoelectronic devices with high failure rate to improve the reliability of fiber optic gyroscope, prolong the service life and reduce the failure probability of single machine. The signal processing circuit sets a special channel to extract the optical power information of the three orthogonal sensitive axes as the fault criterion for fault diagnosis and reconstruction; the time-sharing modulation scheme is adopted, and the working sensitive axis and the fault sensitive axis are switched through the modulation signal. No complex control devices are required.

Description

technical field [0001] The invention relates to the technical field of miniature interferometric fiber optic gyroscopes for satellites, in particular to a high-reliability configuration time-division multiplexing fiber optic gyroscope. Background technique [0002] Due to its advantages of high reliability, high precision, small size and light weight, fiber optic gyroscope has good application and feasibility in space missions. With the development of satellite systems towards high precision, light and small size, low power consumption and low cost, the requirements for high reliability, low cost and small size of fiber optic gyroscopes are put forward. Therefore, reducing volume and improving reliability are important measures for fiber optic gyroscopes to be used in space missions. [0003] Time division multiplexing technology is an important means to reduce the volume of fiber optic gyroscope, reduce the quality, power consumption and cost. The configuration of the tra...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01C19/72
CPCG01C19/72
Inventor 金靖贺纪亮马坤
Owner BEIHANG UNIV
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