Coordinate Calibration Method of Machine Tool Follow-up Laser Scanning Based on Spatial Standard Sphere

Abstract

The invention discloses methods for calibrating machine tool follow-up laser scanning coordinates on the basis of space standard balls, belongs to the field of vision measurement, and relates to a method for calibrating machine tool follow-up laser scanning coordinates on the basis of space standard balls. The method includes providing third-dimension data for linear laser measurement sensors by movement modules of machine tools; scanning, measuring and fitting circle centers of the space standard balls with known radiuses and unifying data of coordinate systems of the machine tools and linear laser measurement coordinate systems; calibrating default axes of the measurement coordinate systems according to movement of the machine tools and movement of laser planes; calibrating measurement axes; integrally calibrating three-dimensional movement to obtain scale transformation matrixes of the coordinate systems of the machine tools and the measurement coordinate systems. The method has the advantages that the shortcoming that only two-dimensional data can be measured by the traditional laser measurement sensors is overcome, the measurement application ranges of the linear laser measurement sensors can be effectively expanded, and the method has a broad application prospect.

Description

technical field [0001] The invention belongs to the field of visual measurement, and relates to a method for calibrating coordinates of a machine tool following laser scanning based on a space standard sphere. Background technique [0002] With the continuous progress of industrial production, parts measurement has gradually become an indispensable part of production. Various types of measurement problems, including contours, gaps, shapes, and defects, pose great challenges to the accuracy and rapidity of measurement methods. high demands. Among the existing measurement methods, the line laser measurement method has been widely used in industrial production due to its fast, high-precision and non-contact measurement advantages. However, the traditional line laser measurement sensor can only measure two-dimensional data in the laser plane. The measurement sensor itself does not have the function of measuring three-dimensional data, and it cannot be operated when three-dimens...

AI Technical Summary

Problems solved by technology

This method can also calibrate the laser plane position of the outgoing structured light sensor, but the calculation of the calibration method is complicated, and a large number of measurement points are required to calibrate the efficiency.

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