Geometric parameter visual measurement method for large composite board

Abstract

The invention relates to a geometric parameter visual measurement method for a large composite board, and belongs to the field of visual measurement. By means of the method, on-site quick three-dimensional reconstruction and geometric parameter measurement of the large composite board can be achieved. According to the method, a binocular vision measurement system, a laser tracker system and an indoor Bluetooth locating system are used for measurement, feature points are distributed on the measured composite board, and reflection targets are pasted to the feature points; the binocular vision measurement system is set up and is composed of a left camera, a right camera, a continuous line laser and an automatic position control platform; the laser tracker system is arranged, and the indoor Bluetooth locating system is mounted, so that measurement is completed. By means of the method, visual calibration of the large composite board can be quickly and precisely achieved, splicing precision of adjacent images is improved, data measurement precision is improved on the whole, and the defects that a traditional measurement method is low in efficiency, precision and stability are overcome.

Description

technical field [0001] The invention belongs to the field of visual measurement and relates to a visual measurement method for geometric parameters of large composite plates. The method can realize on-site fast three-dimensional reconstruction and geometric parameter measurement of large composite plates. Background technique [0002] With the continuous improvement of the requirements for aircraft transportation capacity in the field of air transportation, the application of large aircraft in air transportation is becoming more and more extensive, and the large composite materials used in the aircraft manufacturing process put forward higher requirements for its manufacturing, molding and assembly testing. In order to ensure high-reliability and low-loss connection assembly in aircraft manufacturing, on-line high-precision parameter measurement of large composite panels is a necessary condition to ensure aircraft safety. At present, there are mainly the following methods for...

AI Technical Summary

Problems solved by technology

The three-coordinate measurement method is a contact measurement, which is slow, inefficient, and easy to scratch the surface of the workpiece; the laser tracker measurement method is easily affected by the working environment and is expensive, and the single-point measurement efficiency is low; the indoor GPS measurement method has a low degree of automation. The equipment layout is complex and the operation is cumbersome; the laser radar measurement method is point-by-point scanning, which is greatly affected by environmental conditions during work; while the traditional machine vision method needs to use a calibration board for calibration, the calibration process is complicated, and the image stitching accuracy is not high. Unsatisfactory measurement results of parts

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