Open AccessTerahertz thermal wave nondestructive test
Author(s) -
Dapeng Chen,
Xing Chun-Fei,
Zheng Zhang,
Cunlin Zhang
Publication year - 2012
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.61.024202
Subject(s) - terahertz radiation , nondestructive testing , thermography , materials science , optics , excitation , infrared , thermal conduction , thermal , acoustics , optoelectronics , physics , composite material , quantum mechanics , meteorology
This work aims at developing a new excitation method for thermal wave nondestructive test(NDT)-Terahertz excitation. In the paper we introduce a theoretical model of heat conduction for periodical THz excitation. BWO (backward wave oscillator) terahertz source is employed to heat a carbon fiber plate with wave absorbing coating, surface temperature variations and distributions are captured by an infrared camera, and Canny edge algorithm is used to process thermal images to show the defects. Result of flash pulse thermography serves as comparison, and the advantages of THz thermal wave NDT are discussed. The combination of THz technology and infrared thermal wave NDT is realized.