Tri-axial digital closed ring optical fiber peg-top time-sharing modulation method

A fiber optic gyroscope, digital closed-loop technology, applied in Sagnac effect gyroscope, gyro effect for speed measurement, measurement device and other directions, to achieve the effect of reducing volume, reducing winding difficulty, and avoiding crosstalk

Inactive Publication Date: 2008-02-20
BEIHANG UNIV
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Problems solved by technology

[0004] The purpose of the present invention is to propose a time-sharing modulation method for a three-axis digital closed-loop fiber optic gyroscope. This time-sharing modulation method solves the problem that the existing three-axis fiber optic gyroscope needs three circuits for signal processing, an

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  • Tri-axial digital closed ring optical fiber peg-top time-sharing modulation method
  • Tri-axial digital closed ring optical fiber peg-top time-sharing modulation method
  • Tri-axial digital closed ring optical fiber peg-top time-sharing modulation method

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[0011] The present invention will be further described in detail below in conjunction with the accompanying drawings.

[0012] In the publication number CN 1657876A, the disclosed three-axis integrated fiber optic gyroscope is different from the present invention in that it adopts a light source, a detector, a coupler, a strobe switch, and a modulation timing control unit added in the processor to three The axis digital closed-loop fiber optic gyroscope performs time-sharing modulation, which realizes that the three axes share a set of signal processing circuit, which effectively improves the volume and weight of the three-axis integrated fiber optic gyroscope, and makes the fiber optic gyroscope develop towards miniaturization.

[0013] Please refer to Figure 1, the three-axis digital closed-loop fiber optic gyroscope of the present invention includes a light source, a detector, a coupler, a signal processing circuit, a gate switch, an X-axis phase modulator, an X-axis fiber ring...

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Abstract

The utility model discloses a timesharing modulation method for the three-axis digital closed loop optical fiber gyroscopes; wherein, a time sequence modulation control is arranged in a selected processor through Verilog programming language, and fitted with a gating switch to realize the purpose that three phase modulators and fiber-optic rings are alternately controlled by one signal processing circuit. The utility model adopts the technical proposal that: in the modulation time Tx of the X-axis, the X-axis is modulated by the gating switch, while the Y-axis and Z-axis are not modulated; in the modulation time Ty of the Y-axis, the Y-axis is modulated by the gating switch, while the X-axis and Z-axis are not modulated; in the modulation time Tz of the Z-axis, the Z-axis is modulated by the gating switch, while the X-axis and Y-axis are not modulated. The utility model has the advantages of utilizing one shared signal processing circuit for the three-axis digital closed loop optical fiber gyroscopes, effectively reducing the volume and weight of the three-axis optical fiber gyroscopes, lowering the power consumption of the gyroscopes and dissipating heat efficiently.

Description

technical field [0001] The invention relates to a three-axis digital closed-loop fiber optic gyroscope time-sharing modulation method. Background technique [0002] Fiber optic gyroscope is a new type of angular rate sensor. Compared with mechanical gyroscopes, it has the advantages of all solid state, insensitivity to gravity, and fast startup. Compared with ring laser gyroscopes, it has no high-voltage power supply and no mechanical jitter; It has the advantages of light weight, long life and low cost. It has broad application prospects in military fields such as aviation, aerospace, and navigation, as well as civil fields such as geology and oil exploration. The current typical structural form is: three independent single-axis fiber optic gyro subsystems are used to measure the angular velocity or position of the rotation axis of three orthogonal space coordinate systems. Each fiber optic gyro subsystem includes a light source, a photodetectors and a processing circuit....

Claims

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Application Information

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IPC IPC(8): G01C19/72G01P9/00
Inventor 金靖马东营宋凝芳伊小素张忠钢
Owner BEIHANG UNIV
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