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Wyświetlanie 1-10 z 279
Tytuł:
Assessment of feasibility the use of infrared techniques in aviation : testing structures and aviation parts
Autorzy:
Sobieszek, A.
Powiązania:
https://bibliotekanauki.pl/articles/243819.pdf
Data publikacji:
2016
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
NDT
composites
sandwich composites
active thermography
passive thermography
Opis:
This paper presents the use of infrared thermography in aviation. Each of the described applications has been proved experimentally and revealed the advantages and disadvantages of the thermography method. Thermography is a discipline of research that allows observation of many phenomena, e.g. simple temperature analysis, defectoscopic tests and actions of aerodynamic. Its use in aviation is multidirectional therefore; thermography is an attractive method for research. Thermal techniques seem simple; however require extensive knowledge of infrared radiation, the areas in which this technique is used, the influence of camera parameters on its capabilities and software knowledge applied depending on the purpose. This paper undertakes the verification of temperature analysis method, which is based on the tests of whole machine assembly and its parts during their operation - widely known as passive thermography. Another raised issue is defectoscopic study which aim is to detect structural defects by non-destructive testing (NDT) - active thermography. Several types of sandwich and composite materials were selected, and on the basis of the test results the limitations and possibilities of thermography in the field of active thermography were concluded. The last application considered in this study is the use of thermography for aerodynamic testing, i.e. verification transition point, laminar to turbulent layer on the aerodynamic profile.
Źródło:
Journal of KONES; 2016, 23, 4; 479-485
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Thermal sequences database of the skin flaps in breast reconstruction and burns
Autorzy:
Moderhak, Mateusz
Kaczmarek, Mariusz
Powiązania:
https://bibliotekanauki.pl/articles/114409.pdf
Data publikacji:
2019
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
thermography
active dynamic thermography
burns
breast reconstruction
image database
Opis:
This paper presents a database of Active Dynamic Thermography (ADT) thermal sequences gathered throughout 6 year study on ADT application in skin flap blood perfusion monitoring and burn wounds diagnosis. For skin flap monitoring the database comprises of data collected during three different breast reconstruction procedures. The patients were monitored pre, intra and post surgically within 90 days period. The sequences were used in skin flap parametric imaging aimed at reducing complications and improving flap perfusion. For burns investigation patients were monitored following an accident, at the 3-rd day and 21 days after.
Źródło:
Measurement Automation Monitoring; 2019, 65, 1; 26-29
2450-2855
Pojawia się w:
Measurement Automation Monitoring
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Comparison of Pulse Thermography (PT) and Step Heating (SH) Thermography in Non-Destructive Testing of Unidirectional GFRP Composites
Autorzy:
Kamińska, Paulina
Ziemkiewicz, Jarosław
Synaszko, Piotr
Dragan, Krzysztof
Powiązania:
https://bibliotekanauki.pl/articles/97879.pdf
Data publikacji:
2019
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Lotnictwa
Tematy:
pulsed thermography
step-heating thermography
composites
NDT
NDE
GFRP
Opis:
This paper presents two techniques of active thermography i.e. the pulsed thermography technique and the step heating technique. The aim of this article is to compare these two techniques and present the possibilities, advantages and limitations of their use in the context of non-destructive testing of composite materials. The experimental section presents the results of tests carried out on samples of the polymer composites reinforced with glass fiber.
Źródło:
Fatigue of Aircraft Structures; 2019, 11; 87-102
2081-7738
2300-7591
Pojawia się w:
Fatigue of Aircraft Structures
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Proposition of a method of determining the thermovision measurement extended uncertainty of the surface temperature of an object close to a camera lens
Autorzy:
Dziarski, Krzysztof
Powiązania:
https://bibliotekanauki.pl/articles/114078.pdf
Data publikacji:
2019
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
uncertainty
thermography
metrology
Opis:
In the article the influence of selected factors occurring during thermal measurements on the uncertainty of thermovision temperature measurement is discussed. A situation in which the observed surface was close to the camera lens was measured (distance less than one meter). Based on the type B determination methodology described in the literature on the subject, a method of calculating the measurement extended uncertainty is proposed. A division of factors influencing the thermovision temperature measurement uncertainty into external factors and internal factors is also proposed. Factors associated with the conditions prevailing during the measurement, the geometry of the measurement system and the properties of the observed surface were considered external factors. Factors related to the calibration of the thermal imaging camera, the sensor matrix used and the properties of its measuring path were qualified as internal factors. The method of determining the value of the camera display at the highest and lowest value of a particular factor is discussed. The probability distribution for each of the external factors was determined. The measuring system constructed is presented. It is explained how the uncertainty shares and expanded uncertainty were determined in accordance with the method proposed.
Źródło:
Measurement Automation Monitoring; 2019, 65, 1; 7-10
2450-2855
Pojawia się w:
Measurement Automation Monitoring
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Application of infrared thermography to non-contact testing of varistors
Autorzy:
Galla, S.
Konczakowska, A.
Powiązania:
https://bibliotekanauki.pl/articles/220473.pdf
Data publikacji:
2013
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
thermography
testing
varistors
Opis:
Testing of varistors using thermography was carried out in order to assess their protective properties against possible overvoltage phenomena in the form of high-level voltage surges. An advantage of the thermography technique is non-contact temperature measurement. It was proposed to assess the properties of varistors working in electronic devices as protective elements, on the basis of estimating temperature increments on varistor surfaces, registered by an infrared camera during surge resistance tests with standard voltage levels. To determine acceptable temperature increments on a tested varistor, preliminary testing was performed of P22Z1 (Littelfuse) and S07K14 (EPCOS) type varistors, working first at a constant load and presently during surge tests,. The thermographic test results were compared with measured varistor capacity values before and after tests. It was found that recording with thermography temperature increments greater than 6°C for both P22Z1 and S07K14 varistor types detects total or partial loss of varistor protective properties. The test results were confirmed by assessment of protective properties of varistors working in output circuits of low nominal voltage devices.
Źródło:
Metrology and Measurement Systems; 2013, 20, 4; 677-688
0860-8229
Pojawia się w:
Metrology and Measurement Systems
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Observation using thermography of post-operative reaction after fascial manipulation®
Autorzy:
Fidut-Wrońska, J.
Chołuj, K.
Chmiel, J.
Pikto-Pitkiewicz, K.
Majcher, P.
Powiązania:
https://bibliotekanauki.pl/articles/2085037.pdf
Data publikacji:
2019
Wydawca:
Instytut Medycyny Wsi
Tematy:
fascial manipulation
thermography
inflammation
Opis:
Introduction and objective. Fascia Manipulation® is one of the methods focusing on the deep fascia. The assumption is that fascial manipulation is carried out on precisely determined points – coordination centres (cc), and on a limited area so as the friction occurring during manipulation would cause a local rise in temperature due to the inflammatory reaction. Rise in temperature influences modification in consistency of elementary matter in the manipulated area, and by the same token causing a decrease in the negative effects of fascia densification which stems from accumulation of hyaluronic acid. The purpose of the research is to prove the thesis that fascial manipulation causes local rise in temperature due to inflammatory reaction. Materials and method. For the research, 25 individuals with densification in lower limb area were qualified. They were exposed to a single, 3-minute facial manipulation®. By means of a thermal-imaging camera, changes in the temperature of the body in the examined area were evaluated. The body’s temperature evaluation was carried out 8 times: before the treatment, 5 minutes after the treatment, and, next, 6, 12, 18, 24, 36, 48 hours after the treatment. Results. The average surface temperature of the treated area before mobilization was 33.4°C. A statistically relevant increase in temperature was already observed 5 minutes after the treatment (increase of 0.5°C; p<0.001). However, the highest temperature was observed 24 hours after mobilization (increase of 2.4 °C). The difference between the first and 7 other measurements was statistically relevant (p<0.001). Conclusion. The statistically relevant increase in temperature under the influence of fascial manipulation® in the treatment area can confirm the occurrence of inflammatory reaction.
Źródło:
Annals of Agricultural and Environmental Medicine; 2019, 26, 3; 468-471
1232-1966
Pojawia się w:
Annals of Agricultural and Environmental Medicine
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Stereoskopia w interpretacji termogramów obiektów inżynierskich
Interpretation of thermograms of constructions with use of stereoscopy
Autorzy:
Grońska, J.
Grzesik, I.
Wróbel, A.
Powiązania:
https://bibliotekanauki.pl/articles/131304.pdf
Data publikacji:
2003
Wydawca:
Stowarzyszenie Geodetów Polskich
Tematy:
termografia
stereoskopia
thermography
stereoscopy
Opis:
Termogram przedstawia rozkład temperatury na obserwowanej powierzchni, przez co znacznie się różni od obrazu w świetle widzialnym. Inną cechą szczególną termogramu są rozmycia konturów, spowodowane płynnością rozkładu temperatury na powierzchni obiektu. Utrudnia to identyfikację szczegółów na termogramie, a zatem umiejscowienie na powierzchni obiektu (zwłaszcza obiektów wielopowierzchniowych) odczytanej wartości temperatury. Dla ułatwienia interpretacji autorzy próbują zastosować wykonywanie i stereoskopową obserwację stereotermogramów. Analizę jakości modelu stereoskopowego przeprowadzono na termogramach budynków przemysłowych i mieszkalnych. Dokładność pomiaru na stereotermogramach oceniano przez porównanie go z wynikami pomiaru geodezyjnego i fotogrametrycznego. Stwierdzono, że model przestrzenny jest wyraźnie widoczny wtedy, kiedy oglądamy obrazy w małej skali. Powiększanie obrazu powodowało pogorszenie jakości obserwacji, czasami do tego stopnia, że nie można było osadzić znaczka pomiarowego na powierzchni modelu. Dokładność odtworzenia przestrzennego położenia elementów obiektu zarejestrowanego na stereotermogramie nie jest wysoka. Dla uzyskania dokładnych informacji geometrycznych o obiekcie stereotermogramy nie zastąpią steropary zdjęć fotograficznych (nawet tych wykonanych niewysokiej jakości kamerami cyfrowymi), mogą być natomiast bardzo pomocne przy interpretacji rozkładu temperatury.
Authors are proposing use of stereoscopic observation of thermograms in order to simplify their interpretation. Analysis of the quality of the stereoscopic model has been made on the images of industrial and habitable buildings. It has been found that model is clearly visible when it is seen in a low scale. Enlargement of the image resulted in decreasing accuracy of observations. Accuracy of spatial placement of objects' elements recorded on the stereograph. In order to acquire geometri-cally accurate information about the object it is necessary to make a photographical stereopair, but thermographical stereograph is very useful in the interpretation of temperature distribution.
Źródło:
Archiwum Fotogrametrii, Kartografii i Teledetekcji; 2003, 13b; 371-377
2083-2214
2391-9477
Pojawia się w:
Archiwum Fotogrametrii, Kartografii i Teledetekcji
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
New opportunities for infrared thermography in medicine
Nowe możliwości zastosowania termografii w medycynie
Autorzy:
Ring, F.
Jung, A.
Żuber, J.
Powiązania:
https://bibliotekanauki.pl/articles/261638.pdf
Data publikacji:
2009
Wydawca:
Politechnika Wrocławska. Wydział Podstawowych Problemów Techniki. Katedra Inżynierii Biomedycznej
Tematy:
termografia
termowizja
thermography
thermovision
Opis:
In the last b50 years, termography imaging has found many applications inj medicine. Nowadays, the adventage of computer technology and image processing enable the development of thermography techniques. In this paper some new developments and historical milestones, are reviewed.
Termografia znajduje wiele zastosowań w medycynie od blisko 50 lat. Dynamiczny rozwój nowoczench technologii komputerowych oraz aparatury termowizyjnej umożliwił dalszy postęp technik termograficznych. W pracy zaprezentowano zarówno nowe, jak i już historyczne osiągnięcia.
Źródło:
Acta Bio-Optica et Informatica Medica. Inżynieria Biomedyczna; 2009, 15, 1; 28-30
1234-5563
Pojawia się w:
Acta Bio-Optica et Informatica Medica. Inżynieria Biomedyczna
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Active Thermography in Qualitative Evaluation of Protective Materials
Autorzy:
Gralewicz, G.
Więcek, B.
Powiązania:
https://bibliotekanauki.pl/articles/90338.pdf
Data publikacji:
2009
Wydawca:
Centralny Instytut Ochrony Pracy
Tematy:
protective material
active thermography
defects
Opis:
This is a study of the possibilities of a qualitative evaluation of protective materials with active thermography. It presents a simulation of a periodic excitation of a multilayer composite material. Tests were conducted with lock-in thermography on Kevlar® composite consisting of 16 layers of Kevlar® fabric reinforced with formaldehyde resin with implanted delamination defects. Lock-in thermography is a versatile tool for nondestructive evaluation. It is a fast, remote and nondestructive procedure. Hence, it was used to detect delaminations in the composite structure of materials used in the production of components designed for personal protection. This method directly contributes to an improvement in safety.
Źródło:
International Journal of Occupational Safety and Ergonomics; 2009, 15, 4; 363-371
1080-3548
Pojawia się w:
International Journal of Occupational Safety and Ergonomics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Active dynamic thermography in mammography
Autorzy:
Kaczmarek, M.
Nowakowski, A.
Powiązania:
https://bibliotekanauki.pl/articles/1965793.pdf
Data publikacji:
2004
Wydawca:
Politechnika Gdańska
Tematy:
thermography
breast cancer
mathematical modelling
Opis:
We discuss limitations of the known methods of IR imaging in diagnostics of breast cancer. In conclusion we show that the known methods, based on simple observation of external temperature distribution, are not fully effective. Even advanced pattern recognition could not help in analysis of static images. May active dynamic thermography, known in non-destructive testing of materials, be of any help in breast cancer diagnostics? Analysis of thermal transients forced by external thermal excitation shows, even on simple models, that one may expect a visible improvement in resolution after such excitation. Applied models allow analysis of both static and active thermograms. Basing on the models one may recognise elements of the internal structure of a breast not visible in static pictures. This method, new in clinical practice, seems to be promising, but requires further studies.
Źródło:
TASK Quarterly. Scientific Bulletin of Academic Computer Centre in Gdansk; 2004, 8, 2; 259-267
1428-6394
Pojawia się w:
TASK Quarterly. Scientific Bulletin of Academic Computer Centre in Gdansk
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-10 z 279

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