A rapid inspection method for Large Water Turbine Blade

Author

Liang Xinhe ; Liang Jin ; Liu Jianwei ; Guo Cheng

Author_Institution

Sch. of Mech. Eng., Xi´an Jiaotong Univ., Xi´an, China

fYear

2010

fDate

4-7 Aug. 2010

Firstpage

712

Lastpage

716

Abstract

Aiming at rapidly inspect Blade of Large Water Turbine, a new technology based on optical measurement is proposed. The procedure is divided into three steps: firstly, industrial close-range photogrammetry technology is used to acquire 3D points on the workpiece surface; secondly, using 3 pairs point method and ICP methods to achieve spatial matching between point cloud model and CAD model; finally, an error calculation method for triangulated CAD model is proposed. New vertex directed searching methods promote measuring points attaching to triangulated surfaces of CAD model. Experiments show that the program can meet the engineering requirements. Compared with the TRITOP software, the proposed method makes significantly improvement in measurement accuracy and inspection efficiency.

Keywords

CAD; blades; inspection; measurement; mechanical engineering computing; photogrammetry; solid modelling; turbines; ICP methods; TRITOP software; error calculation method; industrial close-range photogrammetry technology; large water turbine blade; optical measurement; point cloud model; rapid inspection method; triangulated CAD model; vertex directed searching methods; Blades; Clouds; Design automation; Inspection; Iterative closest point algorithm; Solid modeling; Three dimensional displays;

fLanguage

English

Publisher

ieee

Conference_Titel

Mechatronics and Automation (ICMA), 2010 International Conference on

Conference_Location

Xi´an

ISSN

2152-7431

Print_ISBN

978-1-4244-5140-1

Electronic_ISBN

2152-7431

Type

conf

DOI

10.1109/ICMA.2010.5589085

Filename

5589085