Optical fibre gyroscope magnetic field-temperature sensitivity test method
A temperature-sensitive, fiber-optic gyroscope technology, applied in Sagnac effect gyroscopes, measuring devices, instruments, etc., can solve the problems of inconvenient experiments and research, lack of testing methods and equipment, etc.
Inactive Publication Date: 2010-06-02
ZHEJIANG UNIV
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[0003] At present, although there are relevant equipment for research and evaluation of temperature effects in China, there are no special test methods and equipment for the study of the optical fiber gyro magnetic field and the magnetic field-temperature comprehensive evaluation system, which brings great inconvenience to experiments and research.
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[0021] The present invention will be further described below in conjunction with the accompanying drawings.
[0022] As shown in the attached figure, firstly, the turntable is placed horizontally, and the fiber optic gyro is placed on it, and the turntable and the fiber optic gyroscope are relatively fixed to ensure that the fiber optic gyroscope is completely horizontal. At this time, the whole test system is in a uniform magnetic field, and the fiber optic gyroscope is under the action of a radial magnetic field. The semiconductor refrigerator is placed on the turntable, which can control the temperature change. Therefore, this test method can test the output of the fiber optic gyroscope with changes in temperature, magnetic field and magnetic field-temperature, and the data is output to the host computer. By processing the data of the host computer, the influence of the magnetic field temperature on the performance of the fiber optic gyroscope is analyzed.
[0023] The te...
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The invention discloses a test method for the magnetic field and temperature performance of fiber optic gyroscopes. The test method comprises the following main test steps that: a fiber optic gyroscope is horizontally placed on a test platform and rotates in a magnetic field at a constant speed; a computer acquires the output of the fiber optic gyroscope under the action of a static state, a radial magnetic field, an axial magnetic field and different temperature, and respectively tests the output of the fiber optic gyroscope under the combined action of the radial / axial magnetic fields and temperature. The magnetic field and temperature sensitivity of the fiber optic gyroscope can be analyzed through measured magnetic field values, temperature values and corresponding gyroscope output, soas to evaluate the zero-bias stability of the gyroscope under the action of the magnetic fields and temperature, which lays a good solid foundation for building mathematical models later and furthercarrying out the magnetic field and temperature compensation of the gyroscope. The test method can test the radial / axial magnetic field sensitivity and temperature characteristics of the fiber optic gyroscope, which fills a gap in the research in China.
Description
technical field [0001] The invention relates to a method for testing the magnetic field-temperature sensitivity of an optical fiber gyroscope. Background technique [0002] Fiber optic gyroscope is a kind of fiber optic angular velocity sensor based on Sagnac effect. The magnetic field and temperature of the FOG are two important factors affecting the output accuracy of the FOG. Due to the magneto-optic effect, the fiber optic gyroscope produces an additional non-reciprocal phase difference related to the magnetic field. This phase difference changes with the magnitude and direction of the external magnetic field, which reduces the bias stability of the fiber optic gyroscope and directly affects the accuracy of the gyroscope. . Due to the Shupe effect of temperature, when there is a temperature gradient along the fiber coil, the refractive index of each point of the fiber coil changes with time, so the phase changes caused by the temperature of the two beams of light waves...
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IPC IPC(8): G01C25/00G01C19/64
Inventor 程来富张登伟舒晓武
Owner ZHEJIANG UNIV