Automated visual inspection for surface profile tolerancing

Author:

Lau K H1,Ng K C1

Affiliation:

1. Monash University Department of Electrical and Computer Systems Engineering Victoria, Australia

Abstract

Achieving inspection automation is desirable in a production line in order to reduce labour cost and ensure consistent product quality. This paper presents an automated inspection system for a three-dimensional complex surface according to the specification of surface profile tolerancing. A range scanner is used to measure the surface profile of an object and an algorithm is designed to decide upon the acceptability of the part. The pyramidal generalized Hough transform is used to obtain a rough estimate of the object's pose in the three-dimensional world. This pose estimate is then refined over a linearized optimization process to achieve an optimal solution from which shape acceptability can be determined on the basis of a statistical interpretation. Experiments showed that the current inspection system is capable of registering objects having arbitrary deformations and that the system is capable of inspecting objects of complex shape.

Publisher

SAGE Publications

Subject

Industrial and Manufacturing Engineering,Mechanical Engineering

Reference19 articles.

1. 3DPO: A Three- Dimensional Part Orientation System

2. Park H. D., Mitchell O. R. CAD based planning and execution of inspection. IEEE Computer Vision and Pattern Recognition, 1988, 858–863.

3. Gunnarsson K. T., Prinz F. B. CAD model-based localization of parts in manufacturing. IEEE Computer, August 1987, 66–74.

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1. Development of a novel high-speed dynamic length measurement system for mobile and large-scale cylinder workpiece;Proceedings of the Institution of Mechanical Engineers, Part B: Journal of Engineering Manufacture;2014-07-02

2. A comparison of linear and non-linear magnification on target detection performance in visual inspection;Proceedings of the Institution of Mechanical Engineers, Part B: Journal of Engineering Manufacture;2004-10-01

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