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Automatic in-line inspection of shape based on photogrammetry
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Mathematical Science.ORCID iD: 0000-0002-7566-3656
Xtura AB, Kungsbacka.
Xtura AB, Kungsbacka.
University West, Department of Engineering Sciences, Trollhättan.
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Number of Authors: 7
2016 (English)In: SPS16, Lund: SPS16 , 2016, , 9 p.Conference paper (Refereed)
Abstract [en]

We are describing a fully automatic in-line shape inspection system for controlling the shape of moving objects on a conveyor belt. The shapes of the objects are measured using a full-field optical shape measurement method based on photogrammetry. The photogrammetry system consists of four cameras, a flash, and a triggering device. When an object to be measured arrives at a given position relative to the system, the flash and cameras are synchronously triggered to capture images of the moving object. From the captured images a point-cloud representing the measured shape is created. The point-cloud is then aligned to a CAD-model, which defines the nominal shape of the measured object, using a best-fit method and a feature-based alignment method. Deviations between the point-cloud and the CAD-model are computed giving the output of the inspection process. The computational time to create a point-cloud from the captured images is about 30 seconds and the computational time for the comparison with the CAD-model is about ten milliseconds. We report on recent progress with the shape inspection system.

Place, publisher, year, edition, pages
Lund: SPS16 , 2016. , 9 p.
Swedish Production Symposium, 7
National Category
Production Engineering, Human Work Science and Ergonomics Applied Mechanics
Research subject
Experimental Mechanics
URN: urn:nbn:se:ltu:diva-60006OAI: diva2:1040568
7th Swedish Production Symposium, Lund, 25-27 October 2016
Available from: 2016-10-27 Created: 2016-10-27 Last updated: 2017-01-19Bibliographically approved

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