High-precision gauging of metal rings

Mats Carlin; Bjorn Lillekjendlie

doi:10.1117/12.194323

15 November 1994 High-precision gauging of metal rings

Mats Carlin, Bjorn Lillekjendlie

Proceedings Volume 2248, Optical Measurements and Sensors for the Process Industries; (1994) https://doi.org/10.1117/12.194323
Event: Optics for Productivity in Manufacturing, 1994, Frankfurt, Germany

Abstract

Raufoss AS designs and produces air brake fittings for trucks and buses on the international market. One of the critical components in the fittings is a small, circular metal ring, which is going through 100% dimension control. This article describes a low-price, high accuracy solution developed at SINTEF Instrumentation based on image metrology and a subpixel resolution algorithm. The measurement system consists of a PC-plugg-in transputer video board, a CCD camera, telecentric optics and a machine vision strobe. We describe the measurement technique in some detail, as well as the robust statistical techniques found to be essential in the real life environment.

Citation Download Citation

Mats Carlin and Bjorn Lillekjendlie "High-precision gauging of metal rings", Proc. SPIE 2248, Optical Measurements and Sensors for the Process Industries, (15 November 1994); https://doi.org/10.1117/12.194323

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