Automatic in-line inspection of shape based on photogrammetry
2016 (English)In: The 7th International Swedish Production Symposium, SPS16, Conference Proceedings: 25th – 27th of October 2016, Lund: Swedish Production Academy , 2016, 1-9 p.Conference paper (Refereed)
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: Swedish Production Academy , 2016. 1-9 p.
Automatic, full-field, in-line, photogrammetry, shape inspection, single-shot
Production Engineering, Human Work Science and Ergonomics
Research subject ENGINEERING, Manufacturing and materials engineering
IdentifiersURN: urn:nbn:se:hv:diva-10249OAI: oai:DiVA.org:hv-10249DiVA: diva2:1053132
7th International Swedish Production Symposium, SPS16, Lund, Sweden, October 25–27, 2016