Aeronautics composite material inspection with a terahertz time-domain spectroscopy system
By F. Ospald, W. Zouaghi, R. Beigang, C. Matheis, J. Jonuscheit, B. Recur, Jean-Paul Guillet, P. Mounaix, W. Vleugels, P. Bosom and 5 more. 2013
132 citations recorded by the source corpus.
Abstract. The usability of pulsed broadband terahertz radiation for the inspection of composite materials from the aeronautics industry is investigated, with the goal of developing a mobile time-domain spectroscopy system that operates in reflection geometry. A wide range of samples based on glass and carbon fiber reinforced plastics with various types of defects is examined using an imaging system; the results are evaluated both in time and frequency domain. The conductivity of carbon fibers prevents penetration of the respective samples but also allows analysis of coatings from the reflected THz pulses. Glass fiber composites are, in principle, transparent for THz radiation, but commonly with significant absorption for wavelengths >1 THz. Depending on depth, matrix material, and size, defects like foreign material inserts, delaminations, or moisture contamination can be visualized. If a defect is not too deep in the sample, its location can be correctly identified from the delay between partial reflections at the surface and the defect itself.
Subfields: Astronomy and Astrophysics, Atomic and Molecular Physics, and Optics, Electrical and Electronic Engineering
View Paper: https://www.semanticscholar.org/paper/731a7116a2a39ea743f36caddf05eac1582961a9
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In Astronomy and Astrophysics
In Atomic and Molecular Physics, and Optics
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Citations in the corpus
- Review of terahertz photoconductive antenna technology (2017, background): “Many works have studied the potential use of THz imaging and time-domain reflectometry as a quality control tool in electronics fabrication and packaging as well as composite material inspection.(21) Biomedical imaging using THz radiation has been proposed and studied for the purpose of cancer imagi”