1. 30 Juin 2009C.BAULT1 REVERSE ENGINEERING BY LASER SCANNER 3D 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

2. 30 Juin 2009C.BAULT2 What is Reverse Engineering? Wikipedia definition: The reverse-engineering process involves measuring an object and then reconstructing it as a 3D model. The physical object can be measured using 3D 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:

3. 30 Juin 2009C.BAULT3 What is Reverse Engineering? Exemple at CERN: Few exemples:

4. 30 Juin 2009C.BAULT4 Several kinds of measure instruments With a scanner at the end of a harm Non mobile laser scanner Manual laser scanner Photogrammetry camera on support Slide extracted from Aurélies presentation

5. 30 Juin 2009C.BAULT5 Tests done on a mockup Mockup for tests Scan of mockup shown on FARO software

6. 30 Juin 2009C.BAULT6 Tests done on a mockup Cloud of point loaded on CATIAMesh done on CATIA

7. 30 Juin 2009C.BAULT7 Scan of ATLAS calorimeter face (about 300 Millions points) Cloud of point loaded on Catia (a small part)

8. 30 Juin 2009C.BAULT8 Scan of ATLAS calorimeter face Mesh on Catia

9. 30 Juin 2009C.BAULT9 Scan of ATLAS calorimeter face Mesh on Catia (zoom)

10. 30 Juin 2009C.BAULT10 Scan of ATLAS calorimeter face Insertion of mesh in a Catia 3D environment

11. 30 Juin 2009C.BAULT11 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: 3D Reshaper, Rapidform and Geomagic. Below: Surfaces of Atlas calorimeter face created on Geomagic

12. 30 Juin 2009C.BAULT12 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.