Готові списки джерел за темами / Microwave non-destructive diagnostics

Добірка наукової літератури з теми "Microwave non-destructive diagnostics"

Автор: Grafiati
Опубліковано: 30 травня 2022
Оновлено: 31 травня 2022

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Статті в журналах з теми "Microwave non-destructive diagnostics"

1

Osaki, Shota, Atsushi Mase, Yoshikazu Hirata, and Munehiro Iwakura. "Imaging Diagnostics of Inside of a Building Wall Using Millimeter-Wave Reflectometer." Applied Sciences 12, no. 6 (March 11, 2022): 2879. http://dx.doi.org/10.3390/app12062879.

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Анотація:
Progress in microwave and millimeter-wave technologies has enabled advanced diagnostics for industrial applications. The transmission, reflection, scattering and radiation processes of electromagnetic waves are utilized as diagnostic principles. Specifically, the reflectometric method has gained importance in various applications due to the possibility of the high localization and accessibility of measurements, as well as the non-destructive nature of the systems. In this paper, radar reflectometers were applied to the measurement of the inside of a building wall, that is, the inspection of tile materials attached to a concrete wall. The measurement principle utilizes the phase interference effect of the reflected wave due to the multiple reflections between the two layers (Fabry–Perot effect). The results show the imaging inside the surface related to the peering condition between the tile and concrete wall, and the quantitative evaluation of the condition with non-destructive inspection.
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2

Gueorguiev, Nikolay L., Atanas Nachev, and Sergey Ivashov. "Applicability of microwave non destructive diagnostics for composite materials used in the aerospace industry." IOP Conference Series: Materials Science and Engineering 878 (July 22, 2020): 012040. http://dx.doi.org/10.1088/1757-899x/878/1/012040.

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3

Khablov, Dmitrii V. "Remote diagnostics of vibrations of dynamic objects by Doppler microwave sensors." Metrologiya, no. 3 (2020): 25–42. http://dx.doi.org/10.32446/0132-4713.2020-3-25-42.

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Анотація:
This paper describes a promising method for non-contact vibration diagnostics based on the use of Doppler microwave sensors. In this case, active irradiation of the object with electromagnetic waves and the allocation of phase changes using two-channel quadrature processing of the received reflected signal are used. The modes of further fine analysis of the resulting signal using spectral or wavelet transformations depending on the nature of the active vibration are considered. The advantages of this non-contact and remote vibration analysis method for the study of complex dynamic objects are described. The convenience of the method for machine learning and use in intelligent systems of non-destructive continuous monitoring of the state of these objects by vibration is noted.
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4

Aydinalp, Cemanur, Sulayman Joof, and Tuba Yilmaz. "Towards Accurate Microwave Characterization of Tissues: Sensing Depth Analysis of Open-Ended Coaxial Probes with Ex Vivo Rat Breast and Skin Tissues." Diagnostics 11, no. 2 (February 18, 2021): 338. http://dx.doi.org/10.3390/diagnostics11020338.

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Анотація:
Dielectric properties of biological materials are commonly characterized with open-ended coaxial probes due to the broadband and non-destructive measurement capabilities. Recently, potential diagnostics applications of the technique have been investigated. Although the technique can successfully classify the tissues with different dielectric properties, the classification accuracy can be improved for tissues with similar dielectric properties. Increase in classification accuracy can be achieved by addressing the error sources. One well-known error source contributing to low measurement accuracy is tissue heterogeneity. To mitigate this error source, there is a need define the probe sensing depth. Such knowledge can enable application-specific probe selection or design. The sensing depth can also be used as an input to the classification algorithms which can potentially improve the tissue classification accuracy. Towards this goal, this work investigates the sensing depth of a commercially available 2.2 mm aperture diameter probe with double-layered configurations using ex vivo rat breast and skin tissues. It was concluded that the dielectric property contrast between the heterogeneous tissue components has an effect on the sensing depth. Also, a membrane layer (between 0.4–0.8 mm thickness) on the rat wet skin tissue and breast tissue will potentially affect the dielectric property measurement results by 52% to 84%.
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5

Sukhanov, Dmitry, and Kseniya Zavyalova. "Method of Multi-Angle Transmission Radiowave Tomography of Dielectric Objects." Applied Sciences 10, no. 9 (May 8, 2020): 3270. http://dx.doi.org/10.3390/app10093270.

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Анотація:
A method for solving the inverse problem for reconstructing the spatial distribution of dielectric permittivity from the results of multi-angle transmission broadband radiosounding is proposed. The method is based on inverse wave propagation. The average refractive index of the medium along the wave trajectory is calculated by comparing the results of the calculation of the time delay of the inverse signal in the entire sounding region and the forward propagation time in a homogeneous medium. This method takes into account diffraction effects in solving a direct problem, which allows one to obtain a resolution in the order of a wavelength. The combination of time delays obtained at different probing angles allows the restoration of the distribution of the refractive index in the medium. The paper presents the results of the numerical simulation of this method. The novelty of the proposed approach compared to the conventional back-projection algorithm is that ray approximation is not applied. Instead of the absorption coefficient (used in X-ray tomography), a time delay is considered, which is restored in the entire probed region. The developed method can be widely used in radiowave tomography or microwave tomography for remote non-destructive testing, diagnostics for the internal structures of inhomogeneous media and the restoration of the shapes of opaque objects based on multisensor sensing.
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6

Macchioni, Nicola, Massimo Mannucci, Roberto Olmi, Sabrina Palanti, and Cristiano Riminesi. "Microwave Reflectometric Tool for Non-Destructive Assessment of Decay on Timber Structures." Advanced Materials Research 778 (September 2013): 281–88. http://dx.doi.org/10.4028/www.scientific.net/amr.778.281.

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Анотація:
Timber structures can be degraded during their life both by structural problems and, mainly, by biological degradation factors like fungi, and insects (Coleoptera and termites). The occurrence of these biodegradation agents leads, in the absence of appropriate maintenance interventions, to the loss of their structural integrity. Furthermore, if these biological agents decay old buildings, the loss of mechanical resistance of timber structures can be added to loss of cultural heritages. Just in these contexts an early evaluation of decay is crucial to design remedial treatments and a less invasive restoration intervention. This work presents a new microwave diagnostic system for the in situ evaluation of timber structures based on microwave reflectometry, i.e on the measurement of the microwave reflection coefficient as a function of frequency. The continuous-wave (CW) microwave signal is launched by a double-ridged antenna, which also measures the wave reflected by the material under investigation. The measurement system allows diagnosing the effects of biodegradation during a first quick survey in a non-destructive and non-invasive manner. Measurements on laboratory models demonstrated the feasibility of the method. Results obtained on timber beam sections, compared with the findings of traditional investigation methodologies, demonstrate the potentiality of microwave reflectometry, suggesting its usefulness for decay detection and as a support to invasive diagnostic tools.
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7

Šmelko, Miroslav, Katarína Draganová, Pavol Lipovský, Karol Semrád, Monika Blišťanová, and Patrik Kašper. "Non-Destructive Testing of Aircraft Structures Using Microwire-Based Tensile Stress Sensor." Applied Sciences 10, no. 22 (November 20, 2020): 8218. http://dx.doi.org/10.3390/app10228218.

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Анотація:
The development of non-destructive methods for material testing and diagnostics has been, in the last few decades, focused mainly on optical, infrared, thermography, ultrasonic, acoustic or X-ray principles. This article deals with the possibility of adaptation of magnetic sensors for the diagnostics of aircraft structures. The developed sensors are based on the enhanced induction method, allowing contactless diagnostics of the material structure. In the role of the sensing element, amorphous magnetic microwires were used. Thanks to their dimensions, microwires can either be placed on the material surface or be embedded directly into the composite material without structural violations. In the article, the measurement principles of the developed microwire-based tensile stress sensors, together with the experimental measurements with the sensors originally tested in the aircraft wing, are presented.
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8

Rossignol, Jerome, and Alain Thionnet. "Damage in Composite Material: A Microwave Detection." Key Engineering Materials 605 (April 2014): 303–5. http://dx.doi.org/10.4028/www.scientific.net/kem.605.303.

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Анотація:
In the field of the transport, the increase of the security rule recommends to a periodic control of the structure to detect damage due to mechanical loadings. Now, current materials, used in the case of transport applications, are the composite materials. The methods, to control these materials or composite structures, need to be low cost, non-destructive, in-situ and swiftness as far as possible. The scientific literature reports many methods to control the damage in composite materials and structures. However the above requirements and the adaptation to composite materials reduce the number of methods that can be used. Currently, the adapted methods are based on infrared thermography, acoustical emission, EMIR (ElectroMagnetic InfraRed) or microwave imagery. We present an innovative non-destructive method of detecting damages in composite materials. The method is based on the observation and analysis of the modification in dielectric material resulting from damage. The originality of this method is that the diagnostic is obtained by using a microstrip resonator at microwave frequencies. The feasibility of the method is demonstrated by the detection of a fibre break into an unidirectional composite submitted to a flexural loading. The fibre break is the damage to detect. The perspective of this work is to develop a quantification and a localization of damages.
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9

"Preface." Journal of Physics: Conference Series 2091, no. 1 (November 1, 2021): 011001. http://dx.doi.org/10.1088/1742-6596/2091/1/011001.

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Анотація:
These are the proceedings of the 5th International Scientific Conference on Information, Control, and Communication Technologies (ICCT-2021) which had been held October 4-7, 2021 in Astrakhan, Russian Federation. The main technical areas and applications covered by the proceedings are optoelectronics, acousto-optic, microwave technology, antenna systems, measuring technology, metamaterials, nanostructures, nanofilms, photonic crystals, biology and medicine, biophotonics, bioengineering, neural networks in communication technologies; 5G/6G systems; optical and millimeter-wave communication systems; defectoscopy and non-destructive testing of materials and devices for radio- and microelectronics; problems of reliability; automated control systems; diagnostics, etc. The Proceedings can be interesting for specialists in the communications and control systems. The conference had been held in a mixed format (online and offline) due to COVID-19. The organizing committee has chaired the meeting from Astrakhan (Astrakhan State Technical University). The conference included plenary talks (35 min for presentation and 5 min for questions for each speaker) and session talks (10 min for presentation, 5 min for questions). Fifty one speaker participated in the conference in person and ninety five speakers participated online via Zoom. List of Organising Committee, Program Committee are available in this pdf.
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Дисертації з теми "Microwave non-destructive diagnostics"

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Бондаренко, И. Н., Ю. Е. Гордиенко, А. С. Нечипоренко, and А. Ю. Панченко. "Microwave local diagnostics of bioobjects." Thesis, Kharkiv, bookfabrik, 2019. http://openarchive.nure.ua/handle/document/10407.

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Анотація:
Information on the content and changes in the distribution of free and bound water in biological objects allows for the diagnosis of their condition. Microwave diagnostics of bioobjects using resonator transducers with coaxial probe structures provide an opportunity for non-destructive analysis with millimeter and submillimeter spatial resolution. Analytical methods were used to study the nature of the interaction of electromagnetic fields created by coaxial apertures of various configurations with samples. On the basis of the obtained results, directions for the implementation of microwave high-local diagnostics techniques are determined.
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Частини книг з теми "Microwave non-destructive diagnostics"

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Saisi, A., C. Gentile, and L. Valsasnini. "Pre-diagnostic prompt investigation of a historic Bell Tower by visual inspection and microwave remote sensing." In Emerging Technologies in Non-Destructive Testing VI, 477–83. CRC Press, 2015. http://dx.doi.org/10.1201/b19381-79.

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