Study on pulsed phase analysis of depth measurement for infrared thermal wave nondestructive evaluation[J]. Optics and precision engineering, 2008, 16(1): 55-58.
Study on pulsed phase analysis of depth measurement for infrared thermal wave nondestructive evaluation[J]. Optics and precision engineering, 2008, 16(1): 55-58.DOI:
In order to realize the defects’ depth measurement in the infrared thermal wave nondestructive evaluation
pulse phase thermography was introduced. Pulse phase method analyzes pulse data by Fourier transform to temporal signals
and measure the depth according to the relation of thermal wave’s frequency to conduction depth. In this paper
the experimental result of Al flat bottom holes sample is obtained by phase curves in Matlab and thermographs in VC++ under different frequencies. The initial result shows the theoretical depth and factual depth has d≈1.98μ
and pulse phase infrared thermography is an assistant way for subsurface defects detection of material and structure.