Title :
Industrial eddy current sensors for touchless thickness measurement
Author :
Plack, D. ; Clergeot, H. ; Santander, E.
Author_Institution :
LESIR-ENS, Cachan, France
Abstract :
An eddy current sensor has been developed and combined with fast, accurate measurement and digital electronic processing for high-rate simultaneous distance and thickness measurements. The system makes it possible to maintain measurement accuracy even with high-temperature coated samples, using a simple soft correction in the digital processing. It is demonstrated how a theoretical analysis based on physical modeling of the sensor has been used to improve the design and performance. Results of measurements in a particular application (galvanization) corresponding to very adverse industrial conditions (the temperature of the coated metal sheet is about 300 degrees C) are presented.<>
Keywords :
computerised instrumentation; distance measurement; eddy currents; electric sensing devices; thickness measurement; computerised instrumentation; design; digital processing; distance measurement; eddy current sensors; measurement accuracy; modeling; performance; soft correction; thickness measurement; Coatings; Current measurement; Distance measurement; Eddy currents; Galvanizing; Metals industry; Particle measurements; Sensor phenomena and characterization; Tactile sensors; Thickness measurement;
Conference_Titel :
Industry Applications Society Annual Meeting, 1989., Conference Record of the 1989 IEEE
Conference_Location :
San Diego, CA, USA
DOI :
10.1109/IAS.1989.96839
