Temat: IR imaging - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Study of inline-slot ejector diffuser under varying ambient conditions: A passive infrared suppression device for ships
Autorzy:: Singh, L.
Singh, S. N.
Sinha, S. S.
Powiązania:: https://bibliotekanauki.pl/articles/117455.pdf
Data publikacji:: 2020
Wydawca:: Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
Tematy:: applications for navy
ejector diffuser
passive iInfrared suppression device
InfraRed (IR)
IR imaging
IR locking
Shear Stress Transport (SST)
Infrared Suppression System (IRSS)
Opis:: Passive infrared (IR) suppression device, commonly known as ejector diffuser, is an integral part of the defence system of a ship. The definitive role of passive IR suppressor to counter the IR tracking and locking of the ship has made them indispensable for any combat marine. The gas turbine exhaust gases are the leading heat source on a ship. The exhaust temperature of the gases ranges between 650K-850K. At such temperatures, the ship can be easily detected by the enemy through IR imaging. The role of the ejector diffuser is to (i) lower the gas turbine exhaust gases temperature to the limits (< 450K) such that the IR locking of the marine can be avoided, and (ii) recover static pressure such that the engine performance of the gas turbine is not affected. Ejector diffuser has the ability to entrain ambient air and allow mixing it with the exhaust gases thereby, lowering the temperature of the exhaust gases. However, the mixed exhaust gases temperature depends on the ambient air temperature which under extreme conditions can fluctuate from 273K to 323K. This temperature range can affect the temperature characteristics of an ejector diffuser. The present study undertakes the effect of ambient temperature on the performance of inline-slot ejector diffuser. The ambient temperature (T0) has been varied in the range 273K ≤ T0 ≤ 323K in the step of 10K. It has been found that the mass entrainment increases (≈ 8%) as the ambient temperature decreases. The core temperature at the exit decreases, from 457.58 K to 417.75K, with a decrease in the ambient temperature. However, no significant changes in static pressure recovery.
Źródło:: TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2020, 14, 2; 477-482
2083-6473
2083-6481
Pojawia się w:: TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Obrazowanie termiczne w podczerwieni w diagnostyce medycznej – stan i perspektywy
IR-thermal imaging in medical diagnostics – the state of the art and perspectives
Autorzy:: Nowakowski, A.
Powiązania:: https://bibliotekanauki.pl/articles/156744.pdf
Data publikacji:: 2013
Wydawca:: Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:: termografia w podczerwieni
aplikacje medyczne
ADT
IR thermal imaging
medical diagnostics
Opis:: Omówiono stan i perspektywy rozwoju techniki obrazowania termicznego w podczerwieni w diagnostyce medycznej. Jest to dziedzina szybko rozwijająca się, o sporych możliwościach aplikacyjnych ze względu na unikalne cechy łączące możliwości obrazowania zarówno procesów fizjologicznych, funkcjonalnych, jak i badań o charakterze strukturalnym. W szczególności omówiono postępy w rozwoju Aktywnej Termografii Dynamicznej. Przedstawiono wybrane zastosowania w praktyce klinicznej, które zilustrowano wynikami uzyskanymi we współpracy z szeregiem klinik GUMed.
This paper is devoted to developments of IR-thermal imaging in medicine. Most authors active in this field issued the monograph [1]. Some of them are members of the European Society of Thermology; some are specialists in QIRT – Quantitative InfraRed Thermography, too. Recently they participated to the 132 ICB Seminar “Advances of InfraRed thermal imaging in medicine” in Warsaw, July 2013. Here the conclusions of this meeting are summarised. IR-thermal imaging for many years was classified; finally in sixties of XX Century in the USA one of military cameras was applied to medical diagnostics, starting a new imaging modality [2]. Discovery of this technology in medicine was regarded at this time as almost a miracle – a versatile and absolutely non-invasive, objective and quantitative modality. Unfortunately due to lack of standards and miss-use of cameras in thermal mammography, medical professionals for many years gave up this modality. It took many years to recover this very useful technology and to place it as one of the most important modern diagnostic tools, again [3]. The milestone factors are quantification of IR-thermal imaging in 80-ties, development of quantitative NDT (non-destructive testing) methods in 90-ties [4], development of compact IR-cameras with FPA un-cooled detectors, around 2000 [5] and development of dynamic IR-thermal imaging algorithms: active dynamic thermography ADT and thermal tomography TT [6], thermographic signal reconstruction TSR [7], which made the technology matured, relatively inexpensive and easily available on the market. Some results of research grants devoted to applications of thermography in medical diagnostics performed in the Department of BME GUT with several clinics of GUMed are shown.
Źródło:: Pomiary Automatyka Kontrola; 2013, R. 59, nr 9, 9; 861-863
0032-4140
Pojawia się w:: Pomiary Automatyka Kontrola
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Applications of image registration in parametric imaging
Autorzy:: Rumiński, J.
Suchowirski, M.
Powiązania:: https://bibliotekanauki.pl/articles/333586.pdf
Data publikacji:: 2006
Wydawca:: Uniwersytet Śląski. Wydział Informatyki i Nauki o Materiałach. Instytut Informatyki. Zakład Systemów Komputerowych
Tematy:: parametry obrazu
obrazowanie rezonansu magnetycznego
celownik termowizyjny
rejestracja obrazu
parametric imaging
MRI
IR thermal imaging
image registration
Opis:: Applications of image registration in parametric imaging are investigated. The manual and automatic image registration methods have been used for image to image registration in sequences to correct movement artefacts in reconstructed parametric objects. Additionally the registration methods were used for multimodal visualisation of structural and parametric objects. The achieved results proved that the automatic image to image registration, for motion mechanisms correction, in the parametric model improves the quality of images. The multimodal visualisation of structural MRI images and parametric DSC-MRI images, enables to correlate the local dynamic changes with all morphological features.
Źródło:: Journal of Medical Informatics & Technologies; 2006, 10; 47-53
1642-6037
Pojawia się w:: Journal of Medical Informatics & Technologies
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: A novel tool for Non Destructive Testing using frequency analysis of IR image sequences
Autorzy:: Więcek, P.
Strąkowska, M.
Powiązania:: https://bibliotekanauki.pl/articles/114539.pdf
Data publikacji:: 2015
Wydawca:: Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:: IR thermography
wavelet
Fourier
short-time Fourier transforms
functional thermal imaging
Opis:: In this paper, a novel methodology and a software tool for advanced image processing of thermal image sequences are presented. The software implements 1-D Fourier, short-time Fourier and wavelet transforms. The tool uses temperature variation in time for each pixel in the sequence of IR images. It is dedicated to Non Destructive Testing (NDT) testing and the functional time-dependent thermal imaging, e.g. for screening in medical diagnosis. The overall methodology is based on 2-stage analysis. The first, preliminary one is to estimate the right scale/frequency and the moment in time for the final frequency analysis. It can simplify characterization of materials and detection of cracks and defects.
Źródło:: Measurement Automation Monitoring; 2015, 61, 6; 219-222
2450-2855
Pojawia się w:: Measurement Automation Monitoring
Dostawca treści:: Biblioteka Nauki

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