Title :
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
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;
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
DOI :
10.1109/ICIEA.2009.5138629
