Fiber optic gyro reliability prediction model

A fiber optic gyroscope and reliability technology, applied in the direction of measuring devices, instruments, etc., can solve the problems of deviation of predicted results, large errors of predicted results, and different reliability levels, etc., and achieve the effect of good applicability and practicability

CN102435205AInactive Publication Date: 2012-05-02FIFTH ELECTRONICS RES INST OF MINIST OF IND & INFORMATION TECH
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
Publication Date
2012-05-02
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a fiber optic gyro reliability prediction model. The fiber optic gyro reliability prediction model is characterized in that 1, a fiber optic gyro comprises an optical path part and a signal processing circuit part; and 2, in a failure rate formula, lambda b1 represents a basic failure rate of the optical path part; a signal processing circuit failure rate is shown in the patent specification; lambda pi represents a work failure rate of a certain component; and Ni represents the number of the component; piK represents a type factor and shows that the fiber optic gyro is an open loop or is a closed loop; piC represents a structure factor and shows that the fiber optic gyro has a single axis, double axes or three axes; piT represents a temperature factor; and piE represents an environment factor.
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Description

technical field

[0001] The invention relates to device reliability prediction technology, in particular to a fiber optic gyroscope reliability prediction model. Background technique

[0002] From the 1970s to the present, after nearly 40 years of research and development, the fiber optic gyroscope technology has been quite mature, and has a good engineering background. It has become more and more important, and the index data to clarify its reliability level has become an urgent need for engineering. As a multi-technology product integrating light, mechanics and electricity, the fiber optic gyroscope has many factors that affect its reliability, mainly in the following aspects: (1) light source module failure, including failure modes such as optical power drop and spectral instability; (2) Fiber optic coupler failures, including failure modes such as fiber breakage; (3) Y waveguide failures, including failure modes such as electrode failure, waveguide failure, and coupling ...

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Embodiment Construction

[0014] see figure 1 , the present invention divides the fiber optic gyroscope into two parts, i.e. the optical path (Sagnac interferometer) part and the signal processing circuit part, wherein any part breaks down (disqualified), and the fiber optic gyroscope just fails. The failure rate of the fiber optic gyroscope is contributed by two parts, one part is the sensitive device of the optical path (Sagnac interferometer), and the other part is the signal processing circuit; in addition, there are different types of Sagnac interferometers, generally open-loop and closed-loop; the Sagnac interferometer In terms of structure, it is divided into three types: uniaxial, biaxial, and triaxial.

[0015] Through the analysis of field and process data, it is found that these factors have an impact on its reliability. Based on this, the reliability prediction model of fiber optic gyroscope is proposed:

[0016] λ P = λ ...