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Archivio digitale delle tesi discusse presso l’Università di Pisa

Tesi etd-02012015-205528


Tipo di tesi
Tesi di laurea magistrale
Autore
TRAGHELLA, DANIELE
URN
etd-02012015-205528
Titolo
Sviluppo di metodi di rilievo per superfici idrauliche di giranti di pompe centrifughe
Dipartimento
INGEGNERIA CIVILE E INDUSTRIALE
Corso di studi
INGEGNERIA MECCANICA
Relatori
relatore Prof. Barone, Sandro
correlatore Ing. Paoli, Alessandro
correlatore Dott. Razionale, Armando V.
Parole chiave
  • Centrifugal Pumps
  • Optical Tracking
  • Point-by-Point Acquisition
  • Reverse Engineering
  • Stereo Vision
Data inizio appello
25/02/2015
Consultabilità
Completa
Riassunto
The geometrical reconstruction of centrifugal pump impellers is a strategic activity for many manufacturing industries. In particular, the digitalization of internal hydraulic shapes represents the most critical task due to the difficulties in accessing the internal parts of impeller shrouds.
In this thesis, an automatic approach to digitize the internal shape of impellers is presented. The methodology is based on the integration of optical and probing methods in order to combine the advantages of both technologies. The developed approach uses an optically tracked hand-held probe designed to digitize, point-by-point, the whole surface of blades. The tracking system is based on a passive device, composed of two stereo cameras to accurately locate a specific plate, rigidly connected to a probe. The proposed methodology has been validated by experimental tests on primitive surfaces as plane, cylinders and spheres. Nonetheless, the robustness and flexibility of the developed technique has allowed the whole reconstruction of industrial impellers through the acquisition of hundreds of points in few minutes.
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