Angular velocity measurement method, device and application system

Abstract

The invention relates to an angular velocity measurement method, an angular velocity measurement device and an application system. The angular velocity measuring method comprises the steps: measuringlight is emitted and divided into first measuring light and second measuring light; a first angular velocity value is obtained in the first measurement optical path, a second angular velocity value isobtained in the second measurement optical path, a final angular velocity value is obtained, the angular velocity measurement device comprises a first emitter, a second emitter, a first optical splitter, a first measurement optical path, a second measurement optical path and a fourth optical splitter, the fourth optical splitter emits interference signals, and the application system applies the measurement device. According to the invention, high-precision measurement is carried out on the angular velocity through the first measurement optical path and large-range measurement is carried out on the angular velocity through the second measurement optical path; the method has the advantages that the two angular speeds obtained through calculation are combined and calculated to obtain the final angular speed, on the basis of high-precision angular speed measurement, the angular speed measurement range is widened in a coarse-fine combination mode, and the method is high in practicability.

Description

technical field [0001] The invention relates to the field of measurement technology, in particular to an angular velocity measurement method, device and application system. Background technique [0002] The Sagnac interferometer is a high-precision interferometer using the Sagnac effect. The laser Sagnac interferometer can be used to measure the relative angular velocity. With the invention of the femtosecond optical frequency comb, the laser measurement technology has undergone a revolutionary development. The absolute distance measurement , Spectral analysis, long-distance time transmission and other fields have made huge technological breakthroughs, and are quickly applied to various fields of the precision measurement industry. [0003] With the development of fiber optic gyroscopes, Sagnac interferometers are developing in the direction of all-fiber, but their measurement range is small and cannot be used for large-scale measurements. Although traditional optical freque...

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Problems solved by technology

[0003] With the development of fiber optic gyroscopes, Sagnac interferometers are developing in the direction of all-fiber fibers, but their measurement range is small and cannot be used for large-scale measurements. Although traditional optical frequency combs can measure angular velocity, if the measurement accuracy needs to be improved, sagnac fibers need to be added. The length of the interferometer, or increase its area, but this method has the disadvantages of serious dispersion and large volume, and cannot meet the high-precision measurement requirements of angular velocity

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