A demodulation method of a three-axis integrated fiber optic gyroscope
A technology of fiber optic gyroscope and demodulation method, applied in Sagnac effect gyroscope and other directions, can solve the problems of large volume, weight and high cost, and achieve the effect of reducing the overall volume, reducing the overall weight and reducing the cost.
Inactive Publication Date: 2020-07-24
CHONGQING HUAYU ELECTRIC GRP
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Problems solved by technology
The gyroscope inertial group composed of three single-axis fiber optic gyroscopes in a two-by-two orthogonal manner is usually large in size and weight, and is not suitable for installation and use on small carriers; at the same time, the existing three-axis integrated fiber optic gyroscope adopts the light source one for three technology Compared with three single-axis gyroscopes, it saves two light sources, but still needs three sets of solving circuits and three sets of sensitive optical circuits (three Y waveguides, three fiber optic rings and three detectors), and the cost is still high
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[0036] Example: see figure 1 , figure 2 , a three-axis integrated fiber optic gyroscope, including a light source, a coupler, a Y waveguide, a detector, a light source driver board, a main circuit board and a three-axis integrated fiber optic ring. The three-axis integrated optical fiber ring is formed by winding an optical fiber, which has three annulus and two pigtails, and the three annulus are orthogonal to each other; in specific implementation, the three-axis integrated optical fiber ring consists of a The optical fiber is wound by a special symmetrical winding method, which can be sensitive to the angular velocity of the three axes; and the optical fiber transitions between the rings through grooves. The light source driving board is connected with the light source, and the light emitted by the light source is input into the Y waveguide after passing through the coupler, and the two output pigtails of the Y waveguide are respectively connected with the two pigtails of...
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The invention discloses a three-axis integrative fiber-optic gyroscope and a demodulating method thereof. The three-axis integrative fiber-optic gyroscope comprises a light source, a coupling, a Y wave guide, a detector, a light source driving plate, a main circuit board and a three-axis integrative optical fiber ring, wherein the three-axis integrative optical fiber ring is formed by winding an optical fiber, and two output tail fibers of the Y wave guide are separately connected to two tail fibers of the three-axis integrative optical fiber ring. The demodulating method comprises the following steps of: 1) calculating a corresponding transmission time according to lengths of the three-axis integrative optical fiber ring and the ring surfaces; 2) applying an intrinsic modulating signal to the Y wave guide; 3) detecting an interfering optical wave signal through the detector to obtain a comb-like wave signal corresponding to a light wave transmission path; and 4) resolving the signal detected in the step 3) to demodulate the angular rates of rotation of sensitive axis of the ring surfaces. According to the three-axis integrative fiber-optic gyroscope disclosed by the invention, the size of the fiber-optic gyroscope can be effectively reduced, the integral weight of the fiber-optic gyroscope is alleviated, and the cost of the fiber-optic gyroscope is greatly lowered.
Description
technical field [0001] The invention relates to the technical field of fiber optic gyroscopes, in particular to a three-axis integrated fiber optic gyroscope and a demodulation method thereof. Background technique [0002] Fiber optic gyroscope is a sensitive device for angular velocity measurement. The single-axis fiber optic gyroscope can only measure the angular velocity in a single direction along the axis of the fiber optic ring. In practical applications, three single-axis fiber optic gyroscopes are often installed on the same body structure in an orthogonal manner to form a gyroscope inertial group, so as to realize the measurement of angular velocity in three directions in space. The gyroscope inertial group composed of three single-axis fiber optic gyroscopes in a two-by-two orthogonal manner is usually large in size and weight, and is not suitable for installation and use on small carriers; at the same time, the existing three-axis integrated fiber optic gyroscope...
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IPC IPC(8): G01C19/72
CPCG01C19/72
Inventor 李光辉王树春
Owner CHONGQING HUAYU ELECTRIC GRP