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Time Segmented Image Fusion based Multi-depth Defects Imaging Method in Composites with pulsed terahertz
2020
IEEE Access
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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
2016
Ocean Engineering
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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
2020
Sensors
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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]
2012
Terahertz Spectroscopy and Imaging
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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
2014
Journal of Infrared, Millimeter and Terahertz Waves
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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
Contents
2019
2019 PhotonIcs & Electromagnetics Research Symposium - Spring (PIERS-Spring)
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. . . . . . . . . . . . . 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
2021
Optical Engineering: The Journal of SPIE
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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
2007
Reports on progress in physics (Print)
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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
2019
Sensors
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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
2008
2008 33rd International Conference on Infrared, Millimeter and Terahertz Waves
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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
2019
Scientific Reports
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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
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-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
2017
Journal of Physics D: Applied Physics
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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
2021
Microscopy and Microanalysis
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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
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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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