Fiber-optic gyroscope capable of inhibiting starting drift
A fiber optic gyroscope and optical fiber technology, which is applied in Sagnac effect gyroscopes, gyroscopes/steering sensing equipment, measuring devices, etc., can solve the problem of reduced gyro accuracy, fiber optic gyroscope start zero drift, unfavorable system rapid alignment, etc. question
Pending Publication Date: 2020-10-23
北京思卓博瑞科技有限公司
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In the application of the inertial navigation system of the fiber optic gyroscope, the zero position of the fiber optic gyroscope will be affected due to the heating of its own circuit, as well as the heat exchange between external devices and the environment, especially in the initial stage of the inertial navigation system. The heat of the components will be conducted to the sensitive part of the fiber optic gyro - the fiber optic ring, causing the zero position drift of the fiber optic gyroscope. In severe cases, the accuracy of the gyro will be reduced by 1-2 orders of magnitude, which is not conducive to the rapid alignment of the system and other applications
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[0040] Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, the same numerals in different drawings refer to the same or similar elements unless otherwise indicated. The implementations described in the following exemplary embodiments do not represent all implementations consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with aspects of the present application as recited in the appended claims.
[0041] figure 1 It is a schematic structural diagram of a fiber optic gyroscope that suppresses start-up drift provided by an embodiment of the present application. Refer to figure 1 , a fiber optic gyro that suppresses start-up drift, comprising:
[0042] Light source 1, coupler 2, Y waveguide 3, fiber optic ring 4, detector 5, temperature sensor 9, signal processing circuit 6, temper...
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The invention relates to a fiber-optic gyroscope capable of inhibiting starting drift. On the basis that an existing fiber-optic gyroscope comprises a light source, a coupler, a Y waveguide, a fiber-optic ring, a detector and a signal processing circuit, a temperature sensor, a temperature control box and a hub are additionally arranged. The coupler is respectively connected with the light source,the detector and the Y waveguide. A signal control circuit is connected with the detector, the temperature sensor, the Y waveguide and the temperature control box. A first optical fiber and a secondoptical fiber are wound on the fiber-optic ring, the Y waveguide is connected with the fiber-optic ring through a first optical fiber pigtail and a second optical fiber pigtail, the hub is arranged inthe temperature control box, and the first optical fiber pigtail or the second optical fiber pigtail is wound on the hub. During working, the signal processing circuit carries out temperature compensation on the first optical fiber pigtail or the second optical fiber pigtail wound on the hub in real time through the temperature control box according to sensitive angular rate information and temperature information of the fiber-optic gyroscope, so that an error effect opposite to the temperature effect of the fiber-optic ring is generated, and zero drift of the fiber-optic gyroscope caused bystarting heat is compensated.
Description
technical field [0001] The present application relates to the technical field of angular rate sensors, in particular to a fiber optic gyroscope capable of suppressing start-up drift. Background technique [0002] Fiber optic gyroscope is a temperature sensitive angular rate sensor. In the application of the inertial navigation system of the fiber optic gyroscope, the zero position of the fiber optic gyroscope will be affected due to the heating of its own circuit, as well as the heat exchange between external devices and the environment, especially in the initial stage of the inertial navigation system. The heat of the components will be conducted to the sensitive part of the fiber optic gyro - the fiber optic ring, causing the zero position drift of the fiber optic gyroscope. In severe cases, the accuracy of the gyro will be reduced by 1-2 orders of magnitude, which is not conducive to the rapid alignment of the system and other applications. Contents of the invention ...
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IPC IPC(8): G01C19/72
CPCG01C19/726
Inventor 黄忠伟
Owner 北京思卓博瑞科技有限公司