A three-dimensional small-angle measuring device and its method for dynamically measuring three-dimensional angle variation

Abstract

The invention relates to a three-dimensional small-angle measuring device and a method utilizing a three-dimensional small-angle measuring device to dynamically measure three-dimensional angle variation. The three-dimensional small-angle measuring device comprises a transmitting / receiving device, a reflecting device and a data processing computer, wherein the transmitting / receiving device comprises an LED light source, a cross-shaped optical aperture, a dispersion prism A, a measurement lens and a photoelectric detector. Light emitted by the LED light source passes through the cross-shaped optical aperture and the dispersion prism A, is then collimated by the measurement lens, radiated to the reflecting surface of the reflecting device, reflected to the measurement lens afterwards and finally radiated to the photoelectric detector. The three-dimensional small-angle measuring device can distinguish tiny variation of a roll angle to realize measurement of a spatial three-dimensional small angle; collimation light transmitting and receiving are realized by the same measurement lens, so that the optical structure is simple and compact; the attitude matrix is calculated by the multi-vector attitude estimation algorithm to obtain the real-time variation of the three-dimensional angle, so that the characteristics of small calculation quantity and high precision are achieved.

Description

technical field

[0001] The invention belongs to the field of optical precision measurement, and in particular relates to a three-dimensional angle measuring device and a method for accurately measuring three-dimensional small angle variation. Background technique

[0002] Angle measurement is a crucial step in industrial production, quality control, etc. It can usually be divided into static measurement and dynamic measurement. Static measurement refers to the measurement of the angle of the processed or assembled components and the angular position of the instrument under the conditions of returning to static state after rotation. Dynamic angle measurement refers to the measurement of the real-time angle signal of the object or system during the motion process, that is, the equipment under the condition of certain angular velocity and angular acceleration, such as the angle between the satellite orbit and the earth's equatorial plane, the axis of the precision equipment whe...

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