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Time Segmented Image Fusion based Multi-depth Defects Imaging Method in Composites with pulsed terahertz

Qiang Wang, Hongbin Zhou, Ruicong Xia, Qiuhan Liu, Boyan Zhao
2020 IEEE Access  
ACKNOWLEDGMENT This work was supported by the Natural Science Foundation of China [grant numbers 71701210]. Thanks to professor C.X. Pei in algorithm guidance.  ...  And thanks to engineer Linyu Liu and Xiansheng Zhang for guidance.  ...  The results show that the proposed method can effectively improve the terahertz image quality and defect detection rate, especially in the detection of deep defects in composite materials. II.  ... 
doi:10.1109/access.2020.3019319 fatcat:yfcfhr5uhbbr3le3trba5i5k2e

Nondestructive testing of marine protective coatings using terahertz waves with stationary wavelet transform

Wanli Tu, Shuncong Zhong, Yaochun Shen, Atilla Incecik
2016 Ocean Engineering  
We found that the developed model and SWT-based algorithms could be used to evaluate the occurrence of defects beneath the coatings (e. g., paint-off and corrosion defects).  ...  ISSN 0029-8018 , http://dx.Abstract: Terahertz wave propagation in marine protective coatings and its non-destructive testing (NDT) capability were studied by the finite difference time domain (FDTD) method  ...  between different media, similar to the reflection mode of a TPI system, and the results represented the raw terahertz detected signals and were used in the deconvolution processing to get the impulse  ... 
doi:10.1016/j.oceaneng.2015.11.028 fatcat:d7iwldwkffavhisuu7mho4nzla

Non-Contact, Non-Destructive Testing in Various Industrial Sectors with Terahertz Technology

Tao, Fitzgerald, Wallace
2020 Sensors  
In this article, we survey various non-contact, non-destructive testing methods by way of terahertz (THz) spectroscopy and imaging designed for use in various industrial sectors.  ...  The article concludes with a discussion of novel spectroscopy and imaging devices and techniques that are expected to accelerate industry adoption of THz systems.  ...  In the industrial context, this allows examination and detection of defects in small devices such as integrated circuits [8] , as well as structural defects such as cracks in concrete [9] .  ... 
doi:10.3390/s20030712 pmid:32012901 pmcid:PMC7039230 fatcat:ecss3eoxerdu7efmak7ihh2fiy

Industrial Applications of Terahertz Imaging [chapter]

J. Axel Zeitler, Yao-Chun Shen
2012 Terahertz Spectroscopy and Imaging  
In the second half of the chapter we discuss in more detail how terahertz imaging can be used to investigate the microstructure of pharmaceutical dosage forms.  ...  This chapter gives a concise overview of potential industrial applications for terahertz imaging that have been reported over the last decade with a discussion of the major advantages and limitations of  ...  Bee Yin Yeo for her help in putting together Section 18.3.3 of this chapter.  ... 
doi:10.1007/978-3-642-29564-5_18 fatcat:iv2zhbbiinc7bddtzoi5papqim

Review of Terahertz Tomography Techniques

J. P. Guillet, B. Recur, L. Frederique, B. Bousquet, L. Canioni, I Manek-Hönninger, P. Desbarats, P. Mounaix
2014 Journal of Infrared, Millimeter and Terahertz Waves  
A tomographic imaging procedure can be used to acquire and to render three-dimensional images in the terahertz frequency range, as in the optical, infrared or X-ray regions of the electromagnetic spectrum  ...  Terahertz imaging is a well-established technique in various laboratory and industrial applications. However, these images are often two-dimensional.  ...  We would also acknowledge financial support from the European community thanks to the contract DOTNAC (Development and Optimization of THz NDT of Aeronautics Composite multilayered structures) -Contract  ... 
doi:10.1007/s10762-014-0057-0 fatcat:3sqnw4wgpre7jgngmwlletthj4


2019 2019 PhotonIcs & Electromagnetics Research Symposium - Spring (PIERS-Spring)  
. . . . . . . . . . . . . 690 Magnetic Anomaly Detection of Defects in Underground Ferromagnetic Pipeline Using Variational Mode Decomposition and Scale-space Segmentation . . . . . . . . . . . . .  ...  . . . . . . . . . . . . . . . 1481 Magnetic Inverse-design of an Ultra-compact and High-e±ciency Silicon-on-insulator Mode Expander . . . . . . . . . . . 1493 A Python-based Automatic Detection Method  ... 
doi:10.1109/piers-spring46901.2019.9017748 fatcat:lmmr7cnm7nelbbz3f6arofik4q

Review of THz-based semiconductor assurance

John True, Chengjie Xi, Nathan Jessurun, Kiarash Ahi, Navid Asadizanjani
2021 Optical Engineering: The Journal of SPIE  
Incremental advances in THz sources, detectors, and signal processing resulted in the successful applied-industrial use of THz NDT techniques on carbon fiber laminates, automotive coatings, and for detection  ...  Terahertz radiation for inspection and fault detection has been of interest for the semiconductor industry since the first generation and detection of THz signals.  ...  THz signals when enhancing the resolution of the THz imaging outside of using deconvolution techniques alone.  ... 
doi:10.1117/1.oe.60.6.060901 fatcat:uycncszevvdevmznjn5soksmsm

Imaging with terahertz radiation

Wai Lam Chan, Jason Deibel, Daniel M Mittleman
2007 Reports on progress in physics (Print)  
Many new advances in the technology for generation, manipulation, and detection of terahertz radiation have revolutionized the field.  ...  Several of the techniques used for terahertz imaging have been borrowed from other, more well established fields such as x-ray computed tomography and synthetic aperture radar.  ...  Acknowledgments We would like to express sincere gratitude to each of the individuals who have permitted us to display some version of their data for this review.  ... 
doi:10.1088/0034-4885/70/8/r02 fatcat:haz5vrajenf3pgfwa6z5v5ddby

Industrial Applications of Terahertz Sensing: State of Play

Naftaly, Vieweg, Deninger
2019 Sensors  
This paper is a survey of existing and upcoming industrial applications of terahertz technologies, comprising sections on polymers, paint and coatings, pharmaceuticals, electronics, petrochemicals, gas  ...  Finally, an estimate of the market size and growth rates is given, as obtained from a comparison of market reports.  ...  In addition, defects in the foam structure that can influence its mechanical properties can be detected with THz imaging techniques.  ... 
doi:10.3390/s19194203 fatcat:vhn5kgiyi5fqvmxlncd7mydz7q

Nondestructive evaluation of aircraft composites using terahertz time domain spectroscopy

Christopher D. Stoik, Matthew J. Bohn, James L. Blackshire
2008 2008 33rd International Conference on Infrared, Millimeter and Terahertz Waves  
Evidence of bending stress damage and simulated hidden cracks was also detected with terahertz imaging. v  ...  THz TDS, in both transmission and reflection configuration, was used to study composite damage, including voids, delaminations, mechanical damage, and heat damage.  ...  One of the earliest and most promising of these techniques is terahertz time-domain spectroscopy (THz TDS), a method which relies on the generation of broadband electromagnetic transients using ultrafast  ... 
doi:10.1109/icimw.2008.4665841 fatcat:xu6gtq6gefclhfcyflhhotjqb4

Modification of spintronic terahertz emitter performance through defect engineering

Dennis M. Nenno, Laura Scheuer, Dominik Sokoluk, Sascha Keller, Garik Torosyan, Alexander Brodyanski, Jörg Lösch, Marco Battiato, Marco Rahm, Rolf H. Binder, Hans C. Schneider, René Beigang (+1 others)
2019 Scientific Reports  
We clarify the influence of the electron-defect scattering lifetime on the spectral shape and the interface transmission on the THz amplitude, and how this is linked to structural defects of bilayer emitters  ...  The results of our study define a roadmap of the properties of emitted as well as detected THz-pulse shapes and spectra that is essential for future applications of metallic spintronic THz emitters.  ...  D.M.N. acknowledges financial support from the Graduate School of Excellence MAINZ (Excellence Initiative DFG/GSC 266). R.H.B. thanks TU Kaiserslautern for hospitality and SFB/TRR 173 for support.  ... 
doi:10.1038/s41598-019-49963-8 pmid:31527771 pmcid:PMC6746872 fatcat:ger25iarirevxppv4udr5dxte4

2021 Index IEEE Transactions on Instrumentation and Measurement Vol. 70

2021 IEEE Transactions on Instrumentation and Measurement  
-that appeared in this periodical during 2021, and items from previous years that were commented upon or corrected in 2021.  ...  The primary entry includes the coauthors' names, the title of the paper or other item, and its location, specified by the publication abbreviation, year, and article number.  ...  ., +, TIM 2021 6009110 Terahertz Imaging Method for Composite Insulator Defects Based on Edge Detection Algorithm.  ... 
doi:10.1109/tim.2022.3156705 fatcat:dmqderzenrcopoyipv3v4vh4ry

The 2017 terahertz science and technology roadmap

S S Dhillon, M S Vitiello, E H Linfield, A G Davies, Matthias C Hoffmann, John Booske, Claudio Paoloni, M Gensch, P Weightman, G P Williams, E Castro-Camus, D R S Cumming (+34 others)
2017 Journal of Physics D: Applied Physics  
Following the development of laser based terahertz time-domain spectroscopy in the 1980s and 1990s the field of THz science and technology expanded rapidly, to the extent that it now touches many areas  ...  The aim of this roadmap is to present a snapshot of the present state of THz science and technology in 2017, and provide an opinion on the challenges and opportunities that the future holds.  ...  Deconvolution and filtering of the signal in the frequency domain is routine and promising results have been obtained using wavelet denoising.  ... 
doi:10.1088/1361-6463/50/4/043001 fatcat:lkc3cvccvfgchmjs3432xtiqrq

Atom Probe Tomography Analysis of Mica

Chiara Cappelli, Alberto Pérez-Huerta, Sardar B. Alam, Tanya Prozorov
2021 Microscopy and Microanalysis  
In this study, a Mg-rich biotite was analyzed by APT to generate preliminary data on nonisotropic minerals and to investigate the effect of the crystallographic orientation on mica chemical composition  ...  Laser-assisted atom probe tomography (APT) is a relatively new, powerful technique for sub-nanometric mineral and biomineral analysis.  ...  Microscopy work (FIB-SEM and STEM imaging) was performed using instruments in the Sensitive Instrument Facility at the Ames Laboratory, which is operated for the U.S.  ... 
doi:10.1017/s1431927621012940 pmid:35179108 fatcat:2z3l2wqgs5dqdcrl54iyo5y4aq

2020 Index IEEE Transactions on Instrumentation and Measurement Vol. 69

2020 IEEE Transactions on Instrumentation and Measurement  
Meenalochani, M., and Sudha, S., Influence of Received Signal Strength on Prediction of Cluster Head and Number of Rounds; TIM June 2020 3739-3749 Hendeby, G., see Kasebzadeh, P., TIM Aug. 2020 5862  ...  Converter Using All-Digital Nested Delay-Locked Loops With 50-ps Resolution and High Throughput for LiDAR TIM Nov. 2020 9262-9271 Helsen, J., see Huchel, L., TIM July 2020 4145-4153 Hemavathi, N.,  ...  Wang, Q., +, TIM May 2020 1948-1961 Deconvolution Detection of Small Defects in Composite Insulators Using Terahertz Technique and Deconvolution Method.  ... 
doi:10.1109/tim.2020.3042348 fatcat:a5f4fsqs45fbbetre6zwsg3dly
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