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Published on: 07/22/2019

Last Reply on: 10/07/2019

Category: Lighting Equipment

Technology: Vision

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aside from Golden unit, what is the best way to correlate vision systems?

3 Replies

Beckhoff Automation GmbH & Co. KG Logo

If you mean physical correlation, there need's the be some kind of calibration. If you mean data exchange, it depends heavily on the system you use. E.g. in Beckhoff's TwinCAT Vision you can develop multiple vision stations at once in one engineering environment and monitor all stations aggregated in one HMI.

EVT Eye Vision Technology GmbH Logo

Based on a DXF File

Michael Beising from EVT Eye Vision Technology GmbH | 08/22/2019

A3 Member Expert

Jay -- your question mentions "systems" (plural). I infer from the plural that you want to know if you are getting nearly identical results from two or more nominally identical systems. A "Golden Unit" means, to me, a part that is as close to ideal as possible and should give a known result (within some tolerance band). Comparing the results from multiple systems to a Golden Unit only correlates one point on a spectrum of possible results. Yes, use a Golden Unit to start, and assuming good correlation between systems on the Golden Unit, collect a spectrum of other parts spanning the widest range of variations possible. Using those parts, look for correlation between systems. While the Golden Unit must give a prescribed result, these other parts do not need to give a prescribed result; each part gives results across the systems that agree within some tolerance.

Perry West from Automated Vision Systems, Inc. | 10/07/2019