INVESTIGADORES
MARTINEZ Oscar Eduardo
artículos
Título:
A real time method for surface cleanliness measurement
Autor/es:
G.M. BILMES; D.J.O. ORZI; O.E. MARTÍNEZ; A. LENCINA
Revista:
APPLIED PHYSICS B - LASERS AND OPTICS
Editorial:
Springer Verlag
Referencias:
Lugar: Berlin; Año: 2006 vol. 82 p. 643 - 648
ISSN:
0946-2171
Resumen:
ABSTRACT The measurement of surface cleanliness is a signifi-
cant problem in many industrial and technological processes.
Existing methods are based on laboratory procedures, that are
not performed in real time, can not be automated, and usually
are restricted to a small portion of the sample. In this study we
describe a new method for real time measurement of the amount
of surface dirt or contamination deposited on a surface. It relies
on the ablation of the surface dirt film by means of a short laser
pulse, and the subsequent measurement of the emitted sound.
The intensity of the sound is proportional to the amount of
surface dirt and provides a direct measurement of the cleanliness
of the surface. We also developed a reference sample for
calibration, based on a uniform distribution of dots printed on
white paper. The density and the dot size can be easily modified
providing a homogeneous, uniform and reproducible standard
for the measurement. Based on this method, we designed, developed
and patented the first industrial instrument for on-line
determination of the degree of cleanliness of manufactured cold
rolled steel plate bobbins.