Automatic in-line inspection of shape based on photogrammetry

Bergström, Per,1981-Luleå tekniska universitet,Matematiska vetenskaper,Luleå University of Technology, Department of Engineering Sciences and Mathematics, Luleå, Sweden (author)

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.

Fergusson, MichaelXtura AB, Kungsbacka, Sweden (author)
Folkesson, PatrikXtura AB, Kungsbacka, Sweden (author)
Runnemalm, AnnaHögskolan Väst,Avdelningen för produktionssystem (PS),PTW,University West, Department of Engineering Sciences, Trollhättan,Production Technology, University West, Trollhättan, Sweden(Swepub:his)runa (author)
Ottosson, MattiasHögskolan Väst,Avdelningen för produktionssystem (PS),PTW,University West, Department of Engineering Sciences, Trollhättan,Production Technology, University West, Trollhättan, Sweden(Swepub:hv)tmot (author)
Andersson, AlfChalmers University of Technology, Department of Product and Production Development, Gothenburg, Sweden (author)
Sjödahl, Mikael,1965-Luleå tekniska universitet,Strömningslära och experimentell mekanik,Luleå University of Technology, Department of Engineering Sciences and Mathematics, Luleå, Sweden(Swepub:ltu)mike (author)
Luleå tekniska universitetMatematiska vetenskaper (creator_code:org_t)

In:The 7th International Swedish Production Symposium, SPS16, Conference ProceedingsLund : Swedish Production Academy, s. 1-9
In:SPS16Lund : Swedish Production Academy, s. 1-9

By the author/editor: Bergström, Per, ...; Fergusson, Micha ...; Folkesson, Patri ...; Runnemalm, Anna; Ottosson, Mattia ...; Andersson, Alf; show more...; Sjödahl, Mikael, ...; show less...

About the subject

ENGINEERING AND TECHNOLOGY: ENGINEERING AND ...; and Mechanical Engin ...; and Production Engin ...

ENGINEERING AND TECHNOLOGY: ENGINEERING AND ...; and Materials Engine ...; and Manufacturing Su ...

NATURAL SCIENCES: NATURAL SCIENCES; and Mathematics; and Mathematical Ana ...

ENGINEERING AND TECHNOLOGY: ENGINEERING AND ...; and Mechanical Engin ...; and Applied Mechanic ...

By the university: University West; Luleå University of Technology; University of Skövde

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