REVERSE ENGINEERING BY LASER SCANNER 3 D What

REVERSE ENGINEERING BY LASER SCANNER 3 D • What is Reverse Engineering? • Several kinds of measure instruments • Tests done on a mockup • Scan of ATLAS calorimeter face • How build surface from scans ? • Conclusion Research and development shown here was been by: • PH/DT/PO: Andréa CATINACCIO, Aurélie MAURISSET, Mark HATCH and Christophe BAULT • Survey section managed by Christian LASSEUR 30 Juin 2009 C. BAULT 1

What is Reverse Engineering? Wikipedia definition: The reverse-engineering process involves measuring an object and then reconstructing it as a 3 D model. The physical object can be measured using 3 D scanning technologies. The measured data alone, usually represented as a point cloud, lacks topological information and is therefore often processed and modeled into a more usable format such as a triangular-faced mesh, a set of nurbs surfaces or a CAD model. Work Package: 30 Juin 2009 C. BAULT 2

Few exemples: What is Reverse Engineering? Exemple at CERN: 30 Juin 2009 C. BAULT 3

Several kinds of measure instruments Slide extracted from Aurélie’s presentation With a scanner at the end of a harm Manual laser scanner Non mobile laser scanner Photogrammetry camera on support 30 Juin 2009 C. BAULT 4

Tests done on a mockup Mockup for tests 30 Juin 2009 C. BAULT Scan of mockup shown on FARO software 5

Tests done on a mockup Cloud of point loaded on CATIA 30 Juin 2009 C. BAULT Mesh done on CATIA 6

Scan of ATLAS calorimeter face Cloud of point loaded on Catia (a small part) Scan of ATLAS calorimeter face (about 300 Millions points) 30 Juin 2009 C. BAULT 7

Scan of ATLAS calorimeter face Mesh on Catia 30 Juin 2009 C. BAULT 8

Scan of ATLAS calorimeter face 30 Juin 2009 C. BAULT Mesh on Catia (zoom) 9

Scan of ATLAS calorimeter face Insertion of mesh in a Catia 3 D environment 30 Juin 2009 C. BAULT 10

How build surface from scans ? We have sawn sufaces built on Catia are not acceptable. So we foresee test several sofwares be able mesh cloud of point, and create nurbs to make a light surface: 3 D Reshaper, Rapidform and Geomagic. Below: Surfaces of Atlas calorimeter face created on Geomagic 30 Juin 2009 C. BAULT 11

Conclusion What we have done: With Survey section, we have done a lot of research about Reverse Engineering methodology, type of laser scanner and softwares available on the market. We have done several tests of laserscanner with sub-contractor Work to do: Now, we have to test softwares, to learn their using, and take decisions about materials Cern should buy. 30 Juin 2009 C. BAULT 12