Quality control on radiant heaters manufacture

Daniel A. González; Francisco J. Madruga; Clemente Ibarra-Castanedo; Olga Conde; Jose M. López-Higuera

doi:10.1117/12.665490

18 April 2006 Quality control on radiant heaters manufacture

Daniel A. González, Francisco J. Madruga, Clemente Ibarra-Castanedo, Olga Conde, Jose M. López-Higuera

Proceedings Volume 6205, Thermosense XXVIII; 62051O (2006) https://doi.org/10.1117/12.665490
Event: Defense and Security Symposium, 2006, Orlando (Kissimmee), Florida, United States

Abstract

An inspection process of radiant heaters is presented in this paper. The proposed non destructive testing and evaluation (NDT and E) technique for defect assessment of radiant heaters is based on infrared thermography images properly acquired and processed. The technique can be used in on-line fabrication quality control radiant heaters manufacturing processes. By exciting the heater with a very short electrical pulse, a sequence of thermographic images is captured by an infrared camera and then analyzed. Regardless of the electrical excitation applied to the heating element of the heater, the electrical power supplied will dissipate at the resistor. Provided enough spatial resolution, the heaters could be tested with an infrared camera capturing the radiated heat. The analysis of the heating wire during the heating flank shows differences among pixels corresponding to defective points and pixels belonging to non-defective areas of the wire. The automation is provided by the development of an algorithm that looks for the slope of the heating evolution of each pixel. A Radon Transform based algorithm is here proposed to reduce human intervention providing just one image where an operator could quickly locate possible defects.

Citation Download Citation

Daniel A. González, Francisco J. Madruga, Clemente Ibarra-Castanedo, Olga Conde, and Jose M. López-Higuera "Quality control on radiant heaters manufacture", Proc. SPIE 6205, Thermosense XXVIII, 62051O (18 April 2006); https://doi.org/10.1117/12.665490

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