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Indexed by:期刊论文

Date of Publication:2011-06-01

Journal:PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART B-JOURNAL OF ENGINEERING MANUFACTURE

Included Journals:Scopus、SCIE、EI

Volume:225

Issue:B6

Page Number:901-908

ISSN No.:0954-4054

Key Words:dimension measurement; large forging; stereo vision; structured light

Abstract:Non-contact dimensional measurements are desirable in several hot-working processes, such as hot forging processes. A dimensional measurement method, used to reduce scrap and waste during forming processes, is presented, based on a spectrum selective method and stereo vision structured light technique. Using the spectrum selective method, the image of the hot forging can be obtained without interference by self-emitted radiation. A coded single pattern is projected towards the hot forging to label characteristic lines, and simplify the process of finding correspondences between image pairs. The depth can be estimated by triangulation. An ellipse is fitted to the reconstructed 3D data for calculating the diameter of the forging. Experiments in a forging workshop are conducted to measure the diameters of round forgings. The results verify the effectiveness of the presented method.