Calibration of thickness measurement instruments based on twin laser sensors. Isoline bilinear look up tables

Author

Spínola, Carlos ; Vázquez, M. J Martín ; Bohorquez, Alfonso Gago ; Bonelo, José M. ; Vizoso, Julio

Author_Institution

Dept. de Electron., Malaga Univ., Spain

Volume

2

fYear

2001

fDate

2001

Firstpage

1079

Abstract

We present a procedure for the calibration of an instrument for noncontact thickness measurement of stainless steel sheets, based on a pair of triangulation laser sensors. Firstly, we carry out a general review of the architecture of this kind of instrument and of the problems associated with noncontact measurement based on commercial laser sensors in an industrial production environment. Secondly, we introduce a method for the calibration and characterization of this instrument based on the piecewise linear approximation of the isoline curves obtained in the calibration process (isoline bilinear look-up tables). We follow with a description of the searching and calculation of thickness in these types of tables

Keywords

analogue-digital conversion; automatic optical inspection; calibration; computerised instrumentation; interpolation; measurement by laser beam; optical sensors; piecewise linear techniques; stainless steel; table lookup; thickness measurement; ADC; calibration; industrial production environment; interpolation; isoline bilinear look up tables; isoline curves; noncontact thickness measurement; piecewise linear approximation; planar approximation; stainless steel sheets; thickness measurement instruments; triangulation laser sensors; twin laser sensors; Calibration; Continuous production; Displacement measurement; Instruments; Particle measurements; Position measurement; Sensor arrays; Sensor phenomena and characterization; Sensor systems; Thickness measurement;

fLanguage

English

Publisher

ieee

Conference_Titel

Instrumentation and Measurement Technology Conference, 2001. IMTC 2001. Proceedings of the 18th IEEE

Conference_Location

Budapest

ISSN

1091-5281

Print_ISBN

0-7803-6646-8

Type

conf

DOI

10.1109/IMTC.2001.928246

Filename

928246