A three-dimensional small-angle measuring device and method

Abstract

The invention discloses a three-dimensional small-angle measuring device and a three-dimensional small-angle measuring method. The three-dimensional small-angle measuring device comprises a laser, a beam expander, a beam splitter, a measuring camera, a rectangular square pyramid reflector and a data processing computer, wherein a planar reflector is arranged between the beam expander and the beam splitter, the beam splitter is positioned between the measuring camera and a light path of the rectangular square pyramid reflector, laser emitted by the laser is expanded through the beam expander, enters the rectangular square pyramid reflector through the planar reflector and the beam splitter, then returns the beam splitter after being reflected by the rectangular square pyramid reflector, and enters the measuring camera; the data processing computer is connected with the measuring camera. The invention also discloses a method for measuring the three-dimensional small-angle change amount by using the three-dimensional small-angle measuring device further comprises the steps of establishing a coordinate system; acquiring position data of the center of mass of a lasing image spot; and solving the angle. The three-dimensional small-angle measuring device is high in accuracy and measurement resolution ratio due to the adoption of a non-contact optical small-angle precision measurement technology. Compared with a conventional method, the three-dimensional small-angle measuring method has the advantages that the small change amount of a rolling angle can be distinguished, and the spatial three-dimensional small-angle measurement is realized.

Description

technical field [0001] The invention relates to a three-dimensional small-angle measuring device and method in the field of optical measurement. Background technique [0002] Angle measurement is an important part of geometric metrology technology, and has a wide range of applications in various fields such as optical engineering, machinery, aviation, aerospace, and military affairs. High-precision, continuous, and automatic measurement of small angular deflections of objects is an important aspect of angular measurement and has strong application requirements. For example, when a ship is sailing at sea, it will be affected by external stresses such as its own load, wave impact, and environmental temperature changes and the external environment, which will produce non-negligible distortion and deformation, making the attitude of peripheral equipment such as radar antennas and optical measurement systems relative to the central reference Small angles of deflection occur, cau...

AI Technical Summary

Problems solved by technology

However, the optical alignment method is only suitable for one-dimensional or two-dimensional angle measurement, and cannot realize the measurement of roll angle

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