Alnico sheet measurement based on machine vision

Author

Yinzhen Dai ; Wei Zhang ; Shuxia Guo ; Jiancheng Zhang ; Lei Wang

Author_Institution

Sch. of Phys. & Mech. & Electr. Eng., Xiamen Univ., Xiamen, China

fYear

2013

fDate

25-27 Oct. 2013

Firstpage

1

Lastpage

4

Abstract

A vision system for alnico sheet measurement is proposed in this paper, which is composed of a CMOS camera, a lens, a polygonous illuminator and a linear laser projector. The thickness of the alnico sheet is measured by laser triangulation. After the camera is calibrated and the distortion of the image is revised, edge detection and contour fitting are taken to measure the length and width of the alnico sheet. The experiment results show that measuring reproducibilities of the thickness, length and width are 0.00885mm, 0.0022mm and 0.0045mm respectively, and the uncertainty analysis shows that the calibration of the system has the biggest impact on the uncertainty.

Keywords

CMOS image sensors; computer vision; edge detection; length measurement; lenses; CMOS camera; alnico sheet measurement; contour fitting; edge detection; laser triangulation; length measurement; lens; linear laser projector; machine vision; polygonous illuminator; vision system; width measurement; Calibration; Cameras; Length measurement; Machine vision; Measurement by laser beam; Thickness measurement; Uncertainty; alnico sheet; machine vision; size measurement;

fLanguage

English

Publisher

ieee

Conference_Titel

Anti-Counterfeiting, Security and Identification (ASID), 2013 IEEE International Conference on

Conference_Location

Shanghai

Type

conf

DOI

10.1109/ICASID.2013.6825315

Filename

6825315