Multi-axis turntable angle positioning error detection method based on single-axis laser gyro goniometer

A technology of laser gyro and multi-axis turntable, which is applied in Sagnac effect gyroscopes, instruments, measuring devices, etc., can solve the problem of inability to trace the source of the national angle measurement reference device, projection angle measurement error, angle Problems such as measurement errors, to achieve the effect of wide application range, simple detection installation and simple detection device
CN113899323AActive Publication Date: 2022-01-07NAT INST OF METROLOGY CHINA
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
NAT INST OF METROLOGY CHINA
Publication Date
2022-01-07

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Abstract

The invention discloses a multi-axis turntable angle positioning error detection method based on a single-axis laser gyro goniometer, wherein the method comprises the steps: electrifying the single-axis laser gyro goniometer, preheating for 30 minutes, mounting the single-axis laser gyro goniometer mounted in a fixture on a working table surface of a multi-axis turntable, and calibrating an offset value B0 of the single-axis laser gyro goniometer; rotating the measured shaft of the multi-shaft turntable, and enabling the single-shaft laser gyro goniometer to output corresponding pulses and count the output pulses; according to the scale coefficient K of the single-axis laser gyro goniometer and the output pulse number corresponding to the measured shaft, calculating an angle measurement value [theta]i of the measured shaft measured by the single-axis laser gyro goniometer; performing sine curve fitting on the angle measurement error value [delta][theta]i according to the angle measurement value [theta]i of the measured shaft, and calculating the angle measurement error value [delta][theta]i introduced by earth rotation according to the projection angle of a sensitive shaft of the single-shaft laser gyro goniometer; and eliminating the angle measurement error value [delta][theta]i introduced by earth rotation, and calculating an angle positioning error of the measured shaft.
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Description

technical field

[0001] The invention relates to the detection of the angular positioning error of a multi-axis turntable, in particular to a method for detecting the angular positioning error of a multi-axis turntable based on a single-axis laser gyro goniometer. Background technique

[0002] Laser gyro is an inertial navigation and guidance instrument widely used in modern aviation, navigation, aerospace, weapon guidance and rail transportation. With the gradual maturity of laser gyroscope cavity mirror coating process, different-surface cavity processing, and adjustment technology, as well as breakthroughs in major technical issues such as locking, laser gyroscope goniometers rely on high precision, high sensitivity, high resolution, and large dynamic range. And many other excellent properties, has become an important angle measuring instrument.

[0003] The laser gyro goniometer is an instrument that uses the optical path difference of the laser beam to sense the rotatio...

Claims

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