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Wyświetlanie 1-15 z 91
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:
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:
Remarks on noise removal in infrared images
Autorzy:
Budzan, S.
Wyżgolik, R.
Powiązania:
https://bibliotekanauki.pl/articles/114180.pdf
Data publikacji:
2015
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
thermography
infrared images
noise removal
Opis:
Noise removal in IR (Infra Red) images is very popular in recent years, however the same approach is utilized as for vision images, with no or minor changes. In this work we wanted to show the results of noise removal for selected filters. We focused on investigation of some filters normally used for image processing and their influence to IR image quality. In IR imaging the choice of filter depends mainly on the purpose of the processing, e.g. detection of small objects in complex images, edge and contour detection or removal of non-uniformity of the detector array. The performance of the selected noise reduction filters was evaluated using PSNR (Peak Signal-to-Noise Ratio) and MAE (Mean Absolute Error) quality measure, greater value of the PSNR and lower value of the MAE indicate better noise reduction. The results are shown only for few images from our database which contain over 2000 of IR images.
Źródło:
Measurement Automation Monitoring; 2015, 61, 6; 187-190
2450-2855
Pojawia się w:
Measurement Automation Monitoring
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Evaluation of selected thermal properties of components of bonded joint for purposes of active thermography
Autorzy:
Fidali, M.
Kruczek, T.
Kurpiński, M.
Powiązania:
https://bibliotekanauki.pl/articles/114512.pdf
Data publikacji:
2017
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
diffusivity
specific heat
active thermography
Opis:
Adhesively bonded joints are widely used in the automotive industry. Different kinds of defects could appear in the bounded joint during its creation. The defects could be detected by use of many destructive and non-destructive methods including active thermography. Application of active thermography requires setting of test parameters. It could be done based on analytical or numerical models which requires material properties of bonded components. In the article presented results of measurements of thermal diffusivity and specific heat of automotive steel and adhesive for purposes of further modelling and estimation of active thermography test parameters.
Źródło:
Measurement Automation Monitoring; 2017, 63, 3; 102-106
2450-2855
Pojawia się w:
Measurement Automation Monitoring
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Investigation of the Heat Transfer in Radiators for LED Light Sources Using Thermography and Numerical Modeling
Autorzy:
Szubel, M.
Basista, G.
Karkoszka, L.
Powiązania:
https://bibliotekanauki.pl/articles/114533.pdf
Data publikacji:
2015
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
LED
radiators
thermography
numerical modelling
Opis:
Light-emitting diodes – LED, appeared on the market in the 60s of the last century, and today it is the fastest developing lighting technology. Due to high heat flux on the small surface of the individual diodes, problems related to the light source cooling become to be one of the basic ones. The paper presents results of the thermographic and numerical analyses of the chosen design of the LED lamp radiator. Experimental and computational data have been compared and discussed.
Źródło:
Measurement Automation Monitoring; 2015, 61, 6; 257-260
2450-2855
Pojawia się w:
Measurement Automation Monitoring
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Thermographic monitoring of the power transformers
Autorzy:
Lisowska-Lis, A.
Powiązania:
https://bibliotekanauki.pl/articles/114168.pdf
Data publikacji:
2017
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
transformer
thermography
diagnostics
monitoring
cooling
Opis:
Results of thermographic monitoring of exemplary power transformers are presented in the paper. Series of thermograms were taken. The areas on the transformer surfaces were analysed for higher temperature in aspects of: the electrical insulation condition of the transformer, the area on the surface, the season of the measurement. The thermograms indicated inefficient cooling for the transformers with deteriorated electrical insulation, especially during the summer season.
Źródło:
Measurement Automation Monitoring; 2017, 63, 4; 154-157
2450-2855
Pojawia się w:
Measurement Automation Monitoring
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Foreground extraction in images obtained in active thermography
Autorzy:
Kurpiński, M.
Jamrozik, W.
Powiązania:
https://bibliotekanauki.pl/articles/114529.pdf
Data publikacji:
2017
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
active thermography
image processing
segmentation
Opis:
Detecting defects in adhesively bonded joints, using active thermography methods is very promising NDT testing method. In many cases, tests are made with agreed conditions, where a test object is always in specific place of IR camera view. Although, for needs of industry, system should be able to adjust Region of Interest in order to prevailing conditions. Therefore, it is necessary to develop appropriate method for this task. The paper describe one of the easiest attempt to separate foreground of an IR image sequence acquired by Lock-In Thermography (LT) and Pulse Thermography (PT). Proposed approach is based on segmentation and morphological operations. The IR image sequences of 11 various samples were used for this task. Obtained results show that elaborated technique of foreground object extraction is possible.
Źródło:
Measurement Automation Monitoring; 2017, 63, 4; 150-153
2450-2855
Pojawia się w:
Measurement Automation Monitoring
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Detection of Bonded Joint Defects by use of Lock-in Thermography
Autorzy:
Kurpiński, M.
Fidali, M.
Powiązania:
https://bibliotekanauki.pl/articles/114547.pdf
Data publikacji:
2016
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
lock-in thermography
NDT
bonded joints
Opis:
Joining of two or more materials using adhesives is one of the most widely used way to connect and/or seal steel panels used in the automotive industry. Due to instabilities of the technological process a different kind of defects could appear in the adhesively bonded joints. There are many destructive and non-destructive methods allowing investigation of defects of bonded joints. In this article lock-in thermography (LT) technique was used to detect of discontinuities in sealing joints between two steel plates. Results of the research shown the defect of bonded joints could be recognised effectively however it is necessary to ensure proper test conditions.
Źródło:
Measurement Automation Monitoring; 2016, 62, 10; 333-336
2450-2855
Pojawia się w:
Measurement Automation Monitoring
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Identification of the reinforcement bars in concrete samples using eddy currents thermography
Autorzy:
Różański, Leszek
Ziopaja, Krzysztof
Powiązania:
https://bibliotekanauki.pl/articles/114038.pdf
Data publikacji:
2019
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
active IR thermography
eddy currents
reinforcement bars
Opis:
It is known that sub-surface discontinuities of matter, internal voids, inclusions of other materials or delaminations of the structure can be revealed on the surface temperature distribution. An important element of IR thermography investigations is the application of an appropriate heat source to heat the examined object. This article discusses the use of eddy currents for identification of reinforcing bars in concrete samples. The experiments have the laboratory character and are used primarily for qualitative assessment of the influence of bar diameter and concrete cover thickness on the identification of reinforcement in concrete elements. In order to induce a transient heat flow in tested samples, the eddy currents (EC) generator from IFF GmbH was used. After the pulse was completed, the surface temperature distribution was recorded using FLIR T620 infrared camera. The following experimental studies validate the practical application of active IR with EC to locate and assess the technical condition of reinforcing bars in reinforced concrete structures in buildings and civil engineering structures.
Źródło:
Measurement Automation Monitoring; 2019, 65, 2; 55-59
2450-2855
Pojawia się w:
Measurement Automation Monitoring
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The use of IR thermography for testing the operation parameters of water radiant ceiling systems for heating
Autorzy:
Sornek, K.
Gradzik, I.
Rzepka, K.
Filipowicz, M.
Powiązania:
https://bibliotekanauki.pl/articles/114128.pdf
Data publikacji:
2015
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
IR thermography
radiant ceiling system for heating
Opis:
This paper shows the possibility of the use of IR thermography for testing the operational parameters of water radiant ceiling systems for heating. The study showed positive results regarding the efficiency of different types of ceiling panels in a function of the level of homogeneous surface temperature distribution. Experimental results were supplemented by theoretical calculations performed with the use of a special equation originally dedicated to sun collector calculations.
Źródło:
Measurement Automation Monitoring; 2015, 61, 6; 228-232
2450-2855
Pojawia się w:
Measurement Automation Monitoring
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Thermographic Criteria of Evaluation of Technical Condition of Machinery and Equipment
Autorzy:
Fidali, M.
Powiązania:
https://bibliotekanauki.pl/articles/114634.pdf
Data publikacji:
2015
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
infrared thermography
machinery
devices
diagnostics
methodology
criteria
Opis:
Infrared thermography is used for the diagnosis purposes of various machines and devices. Despite the huge potential of thermography as a diagnostic tool, beginning thermographers are not always able to correctly assess and classify condition of the investigated object. The article presents an overview of current standards, and characterizes the methods and criteria for assessing the condition of machines and equipment.
Źródło:
Measurement Automation Monitoring; 2015, 61, 6; 245-248
2450-2855
Pojawia się w:
Measurement Automation Monitoring
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Non-destructive evaluation of sandwich plates by an ultrasonic IR thermographic method
Autorzy:
Świderski, W.
Hłosta, P.
Chuda-Kowalska, M.
Powiązania:
https://bibliotekanauki.pl/articles/114699.pdf
Data publikacji:
2016
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
non-destructive testing
IR thermography
sandwich panels
Opis:
The paper presents the possibility of using an ultrasonic IR thermographic method to detect internal defects in composite types of sandwich panels with metal sheets. Experimental results indicate that this method may in many cases be effective in detecting defects that weaken the structure of sandwich panels. The results also show the limitations of using this method to sandwich panels and the materials used in them.
Źródło:
Measurement Automation Monitoring; 2016, 62, 12; 406-410
2450-2855
Pojawia się w:
Measurement Automation Monitoring
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Zakres spektralny kamery termowizyjnej do badań w mikroelektronice
Spectral Range of IR Camera for Research in Microelectronics
Autorzy:
Błąd, G.
Wałach, T.
Powiązania:
https://bibliotekanauki.pl/articles/157693.pdf
Data publikacji:
2009
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
termografia
mikroelektronika
niepewność
infrared thermography
microelectronics
uncertainty
Opis:
Omówiono główne czynniki wpływające na wybór zakresu spektralnego kamery termowizyjnej do badań w mikroelektronice: parametry katalogowe kamer, przebiegi krzywych kalibracyjnych oraz własności promienne mikroukładów. Dla oceny kamer opracowano procedurę i obliczono niepewność standardową pomiaru emisyjności i temperatury. Zwykle mniejszą niepewność oferują kamery średniofalowe, lecz inne czynniki mogą zdecydować o wyborze kamery długofalowej.
In microelectronics the accuracy of infrared thermography very often depends strongly on the IR camera spectral range. Cameras with different spectral ranges are usually compared using the uncertainty of temperature measurements. There are several works devoted to calculating this uncertainty. Unfortunately, in these works the uncertainty of emissivity measurements is arbitrarily determined, which makes it difficult to evaluate generally the accuracy of cameras. In the paper procedures for calculation of the relative combined standard uncertainties of emissivity and temperature measurements are proposed. Thanks to knowledge of the definition of some camera parameters it was possible to estimate well the uncertainty components coming from the camera by using statistical relationships and to achieve a high reliability of calculations. The calculation results allow one both to evaluate generally the uncertainties for IR cameras with various spectral ranges and to determine the conditions of obtaining low values of these uncertainties. The camera calibration curve shape influences not only the uncertainty but also the result of averaging temperatures in the camera ground instantaneous field-of-view. The dependence of this result on the spectral range is analysed in the work. In microelectronics the radiative properties of the components may often have the main influence on the choice of camera. Some of these properties and their impact on measurements are also discussed.
Źródło:
Pomiary Automatyka Kontrola; 2009, R. 55, nr 11, 11; 878-881
0032-4140
Pojawia się w:
Pomiary Automatyka Kontrola
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Zastosowanie termografii w diagnostyce i badaniach urządzeń elektronicznych
Application of infrared thermography to diagnosis and testing of electronic equipment
Autorzy:
Galla, S.
Konczakowska, A.
Powiązania:
https://bibliotekanauki.pl/articles/153494.pdf
Data publikacji:
2013
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
termowizja
odporność
diagnostyka
EMC
thermography
immunity
diagnostic
Opis:
Zaproponowano zastosowanie techniki termowizyjnej do oceny poprawność konstrukcji i działania urządzeń elektronicznych. Technikę termowizyjną zastosowano do badania elementów ochronnych zasilacza AC/DC w czasie standardowych badań odporności na udary oraz do badania modułów GSM pracujących pod kontrolą nadrzędnego programu sterującego i płyty głównej centrali systemu przeciwpożarowego. Pomiary termowizyjne zastosowano do oceny przyrostu temperatury ww. urządzeń.
In the paper there is proposed use of infrared thermography for assessing the validity of construction and operation of electronic devices. The most important advantages of this technique are the short time of studies and the ability of direct evaluation of results. It was found that for electronic devices it was appropriate to record infrared imagings in various states of their operation. Comparison of temperature increments from different states of operation enables validation of constructions from the heat discharge point of view. Investigations were performed for AC/DC power supplies, a GSM module, and the motherboard of a fire-fighting system using the camera VIGOcam v50. For AC/DC power supplies (Fig. 1) it was proposed to record infrared imagings during the surge immunity test (the standard EN 61000-4-5) in order to evaluate the quality of protective elements, varistors. From the imaging of the power supply immediately after the first surge (Fig. 2b) it was possible to evaluate the temperature increment on the varistor. It was stated that the accepted temperature increments on the varistor could be equal up to 30°C. The research results for the GSM module (Fig. 3) and the motherboard of the fire-fighting system (Figs. 4 and 5) are presented as imagings of the devices operating in a standby regime and with a full power. The areas with increased emission were identified. It was found that infrared thermography is very useful in the assessment of temperature distributions.
Źródło:
Pomiary Automatyka Kontrola; 2013, R. 59, nr 4, 4; 345-348
0032-4140
Pojawia się w:
Pomiary Automatyka Kontrola
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Jakość diagnozowania termograficznego w podczerwieni jako funkcja wymuszenia termicznego w wybranych zastosowaniach medycznych
The Quality of the Infrared Thermographic Diagnosis as Function of Thermal Stimulation in Chosen Medical Applications
Autorzy:
Trafarski, A.
Jaskólska, Z.
Różański, L.
Powiązania:
https://bibliotekanauki.pl/articles/152788.pdf
Data publikacji:
2007
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
termografia medyczna
termostymulacja
medical thermography
thermal stimulation
Opis:
Działanie wielu zabiegów fizykalnych stosowanych w medycynie wiąże się ze zmianami temperatury tkanek. Przeprowadzono badania dotyczące możliwości wykorzystania techniki termograficznej do oceny skuteczności zabiegu krioterapii miejscowej (kriostymulacji miejscowej) u pacjentów z reumatoidalnym zapaleniem stawów. Badanie przeprowadzono w celu określenia stopnia intensywności wymuszenia termicznego podczas zabiegów krioterapii miejscowej i czasu trwania odpowiedzi organizmu na zastosowane wymuszenie. Badanie oparto na porównaniu rozkładu temperatury na powierzchni dłoni przed, zaraz po zabiegu miejscowego nadmuchu oparami ciekłego azotu lub zimnego powietrza na dłoń oraz w pewnych okresach czasu po zabiegu. Wszystkie osoby poddane badaniu były chore na reumatoidalne zapalenie stawów, u niektórych badanych występowały również inne choroby towarzyszące. Podobne procedury wykorzystano do badania reakcji współzmienniczych związanych ze stosowaniem kremów antycellulitowych. W obydwu przypadkach można było zaobserwować podobne reakcje organizmu na zastosowane wymuszenie. Badania pozwoliły na zoptymalizowanie procedur stymulacji termicznej stosowanych w reumatologii i kosmetologii.
Many medical procedures cause the thermal changes of flesh and tissues. In the paper, the investigation on the possibilities of thermographic technique application for evaluation of the criotherapy procedure success (local criostimulation) have been described. The people with rheumathoid arthritis underwent the criogenic treatment in order to evaluate the degree of local thermal stimulation and the time of the organism response. The investigations have been based on the temperature distribution on the palm surface before the treatment with cooled air or liquid nitrogen, immediately after, and in certain time periods. The similar examination had been held in the investigations of the related variables after cellulitis treatment with creams. The organism reactions are very similar in both cases. The investigations have led to the optimization of procedures of thermal stimulation in rheumatology and cosmetology.
Źródło:
Pomiary Automatyka Kontrola; 2007, R. 53, nr 9 bis, 9 bis; 437-439
0032-4140
Pojawia się w:
Pomiary Automatyka Kontrola
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 91

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