High speed terahertz TDS scanner for automatic detection of defects

Norbert Palka,Kamil Kaminski,Marcin Maciejewski,Piotr Synaszko,Krzysztof Dragan

2023 SBMO/IEEE MTT-S INTERNATIONAL MICROWAVE AND OPTOELECTRONICS CONFERENCE, IMOC（2023）

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摘要

Automatic detection of defects in glass fibre reinforced polymer (GFRP) based on a terahertz time-domain spectroscopy (TDS) system is presented. We measured a GFRP sample with 15 round delaminations of different sizes by means of a TDS reflective scanner. The algorithm acquired a series of C-scans, which were then analysed using two complementary methods - adaptive threshold and Gaussian valley emphasis. 100% of defects were successfully detected.

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关键词

terahertz,imaging,defect detection,thresholding,scanner

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