High-throughput single pixel spectral imaging system for glow discharge optical emission spectrometry elemental mapping enabled by compressed sensing

Carbon fiber laminates enjoy a wide range of applications from innovative architectural design to aerospace and the safety overwrap for pressure vessels. In the case of carbon fiber overwrapped pressure vessels (COPVs), the overwrap thickness can vary from 6 mm (0.25 inch) for thin-walled COPV up to 25 mm (~ 1”) or more for thick walled COPV, depending on the vessel type. The failure mechanisms for carbon fiber are more complex than for metals and monitoring COPVs for defects or fatigue over their lifetime is further complicated by the thickness of the carbon fiber used. In this paper, we introduce a new technique, Electro-Magnetic-Inductive-Coupling-Analysis, or EMICA, which can detect damage inside thick carbon fiber laminate pieces. EMICA is based on the interaction of the repeating three-dimensional conducting structure of carbon fiber and low-frequency electromagnetic waves to highlight defects such as delamination and fiber disruptions, well below the laminate surface. In this paper, we demonstrate EMICA in flat carbon fiber laminates up to 12 mm (~ 0.5”) thick, made in-house, with known defects hidden through the thickness of the piece that cannot be detected via visual inspection.

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High-throughput single pixel spectral imaging system for glow discharge optical emission spectrometry elemental mapping enabled by compressed sensing

Abstract: Glow discharge optical emission spectroscopy elemental mapping (GDOES EM), enabled by spectral imaging strategies, is an advantageous technique for direct multi-elemental analysis of solid samples in rapid timeframes. Here, a...

Cited by 3 publications

References 39 publications

Computer simulation and modeling of glow discharge optical emission coded aperture elemental mapping

Computer simulation and modeling of glow discharge optical emission coded aperture elemental mapping

Probe-Free High-Resolution Millimeter-Wave Frequency-Diverse Sensing Based on Spoof Surface Plasmon Polaritons

Electromagnetic Inductive Coupling Analysis (EMICA): A new tool for imaging internal defects in carbon fiber composites

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