A measurement system for printed circuit board parameters based on image

Author

Xiong, Bangshu ; Ou, Qiaofeng

Author_Institution

Key Lab. of Nondestructive Test of Minist. of Educ., Nanchang Hangkong Univ., Nanchang

fYear

2009

fDate

25-27 May 2009

Firstpage

2396

Lastpage

2400

Abstract

We develop a printed circuit board (PCB) measurement system to measure the line width, the angle between two lines, the pad diameter and the pad center position. We present the hardware constructions and the software design scheme. We propose the key algorithms on the measurement of the line width and pad parameters. The origin of measurement error is discussed. The solutions to reduce the measurement error are proposed. Experimental results demonstrate that the system is efficient and its measurement error is less than 2 mum. The system has been applied to manufacturing printed circuit boards and brought good social and economic benefits.

Keywords

CCD image sensors; image processing; least squares approximations; measurement errors; measurement systems; printed circuit manufacture; production engineering computing; least square fitting; measurement error; measurement system; pad center position; pad diameter; printed circuit board; Cameras; Charge coupled devices; Charge-coupled image sensors; Digital images; Electromagnetic measurements; Hardware; Manufacturing; Measurement errors; Position measurement; Printed circuits; image measurement; least square fitting; printed circuit board;

fLanguage

English

Publisher

ieee

Conference_Titel

Industrial Electronics and Applications, 2009. ICIEA 2009. 4th IEEE Conference on

Conference_Location

Xi´an

Print_ISBN

978-1-4244-2799-4

Electronic_ISBN

978-1-4244-2800-7

Type

conf

DOI

10.1109/ICIEA.2009.5138629

Filename

5138629