| Numéro |
J. Phys. IV France
Volume 129, October 2005
|
|
|---|---|---|
| Page(s) | 201 - 205 | |
| DOI | https://doi.org/10.1051/jp4:2005129042 | |
J. Phys. IV France 129 (2005) 201-205
DOI: 10.1051/jp4:2005129042
Analysis of thermograms based on FFT algorithm
J. Bodzenta1, A. Kazmierczak1 and T. Kruczek21 Silesian University of Technology, Institute of Physics, Gliwice, Poland
2 Silesian University of Technology, Institute of Thermal Technology, Gliwice, Poland
Abstract
A series of thermovision images of a test plate were
analyzed in this work. The imaged object was an aluminum plate with glued
metallic and non-metallic samples. The back surface of the plate was heated
by an electrical heater. In our experiment periodical heating was applied at
10 mHz, 20 mHz, 30 mHz and 50 mHz and series of images were registered using
thermaCAM
SC 2000 IR infrared camera. Obtained time series were then
analyzed using fast Fourier transform (FFT) algorithm and were converted
into amplitude and phase images. Differences between images in time and
frequency domains were discussed. Possibility of obtaining quantitative
information about the sample from frequency analysis was also considered.
© EDP Sciences 2005