Journal ArticleDOI
A novel pulse compression algorithm for frequency modulated active thermography using band-pass filter
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TLDR
In this paper, the authors proposed a novel pulse compression algorithm, in the context of frequency modulated thermal wave imaging, derived from a predefined reference pixel in a recorded video, which contains direct measurement of the excitation signal alongside the thermal image of a test piece.About:
This article is published in Infrared Physics & Technology.The article was published on 2017-05-01. It has received 12 citations till now. The article focuses on the topics: Pulse compression & Band-pass filter.read more
Citations
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Journal ArticleDOI
An overview of corrosion defect characterization using active infrared thermography
TL;DR: In this paper, an overview on the applications of infrared thermography for the detection and characterisation of general metal loss in metallic materials is presented, which represents the advances of thermography applications specifically in metal loss/thickness variation measurement along the recent literature.
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Pulse Compression in Nondestructive Testing Applications: Reduction of Near Sidelobes Exploiting Reactance Transformation
TL;DR: A windowing function based on reactance transformation is proposed that outperforms the most used ones in terms of near-sidelobes level reduction and sidelobes oscillations suppression and can be successfully exploited in any application relying on chirp PuC.
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Halogen optical referred pulse-compression thermography for defect detection of CFRP
Shichun Wu,Bin Gao,Yang Yang,Yuyu Zhu,Pietro Burrascano,Stefano Laureti,Marco Ricci,Yizhe Wang +7 more
TL;DR: In this article, the step heating contribution is recorded separately by mean of an additional measurement, which can effectively enhance the defect information and improve the thermal contrast between defect and non-defect areas when halogen lamps are used in combination with pulse-compression in reflection mode.
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Pixel-Level Classification of Pollution Severity on Insulators Using Photothermal Radiometry and Multiclass Semisupervised Support Vector Machine
TL;DR: An innovative method based on photothermal radiometry (PTR) and multiclass semisupervised support vector machine for the classification of insulator pollution severity and an estimation framework for fast, accurate, and nondestructive industrial application without the tedious work of labeling large amounts of data is proposed.
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Sparse Reconstruction-Based Thermal Imaging for Defect Detection
TL;DR: This paper proposes an idea of employing sparse reconstruction-based technique for thermal imaging defect detection, and describes cross-validation method for optimization of a user parameter in sparse reconstruction method.
References
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Journal ArticleDOI
An introduction to matched filters
TL;DR: In a tutorial exposition, the following topics are discussed: definition of a matched filter; where matched filters arise; properties of matched filters; matched-filter synthesis and signal specification; some forms of matched filter.
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The theory and design of chirp radars
TL;DR: This paper contains many of the important analytical methods required for the design of a Chirp radar system, and a method to reduce the time side lobes by weighting the pulse energy spectrum is explained in terms of paired echoes.
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Thermal wave imaging with phase sensitive modulated thermography
TL;DR: In this paper, the authors combined thermal wave and thermography to provide a short-time low-frequency phase angle image where non-thermal features can be suppressed using lock-in data analysis.
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Theory of frequency modulated thermal wave imaging for nondestructive subsurface defect detection
Ravibabu Mulaveesala,Suneet Tuli +1 more
TL;DR: In this paper, the authors provided the theory and mathematical analysis in support of a recently proposed frequency modulated thermal wave imaging for nondestructive subsurface defect detection in solids.
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Pulse Compression-Key to More Efficient Radar Transmission
TL;DR: The technique of pulse compression offers a means of increasing the average power available to illuminate radar targets without any loss at the receiver of the resolution needed for the tactical requirements of the system.