20.500.12556/RUL-119344 Infrardeča termografska analiza LED svetil na keramični plasti Infrared thermographic analysis of LED lights on a ceramic layer LED svetila intenzivno nadomeščajo žarnice z volframovo žarilno nitko, pri čemer je poleg doseganja dobrih optičnih lastnosti pomembno zagotavljati njihovo učinkovito hlajenje. V tej nalogi obravnavamo infrardečo termografsko analizo dveh različnih LED svetil na keramični plasti z debelinami od 0,25 mm do 5 mm. Razvita je bila eksperimentalna proga, ki omogoča napajanje LED svetila z omejevanjem električnega toka in napetosti ter sočasno spremljanje porabe električne moči in merjenja temperature s pomočjo hitrotekoče infrardeče kamere. V okviru meritev smo analizirali segrevanje keramičnih plasti različnih debelin, vpliv orientacije LED svetila, dinamični odziv segrevanja in čas, potreben za doseganje ustaljenega temperaturnega stanja pri različnih električnih močeh. Prikazani so tudi temperaturni profili in dvodimenzionalna temperaturna polja. Rezultati meritev kažejo, da razviti merilni postopek omogoča vrednotenje segrevanja LED svetil in določanja maksimalne dovoljene električne moči, da zadostimo temperaturnim omejitvam. LED lamps intensively replace incandescent lamps, and in addition to achieving good optical properties, it is important to ensure their efficient cooling. In this paper, the infrared thermographic analysis of two different LED lamps on a ceramic layer with thicknesses from 0.25 mm to 5 mm is considered. An experimental track has been developed that enables the power supply of LED lights by limiting current and voltage, while simultaneously monitoring electrical power consumption and temperature measurement using a high-speed infrared camera. As part of the measurements, the heating of ceramic layers of different thicknesses, the influence of LED light orientation, the dynamic heating response and the time required to achieve a steady-state temperature at different electrical powers were analyzed. Temperature profiles and two-dimensional temperature fields are also shown. The measurement results show that the developed measurement procedure enables the evaluation of the heating of LED lights and the determination of the maximum allowable electrical power in order to meet the temperature limits. infrardeča termografija meritve LED svetila keramična plast toplotna analiza infrared thermography measurements light-emitting diode ceramic layer thermal analysis true false false [J. Purič] Slovenski jezik Angleški jezik Diplomsko delo/naloga 2020-09-08 08:32:03 2020-09-08 08:32:07 2022-08-31 03:52:39 0000-00-00 00:00:00 2020 0 Ljubljana 0 XXII, 49 str. 0000-00-00 NiDoloceno NiDoloceno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 519.6:536(043.2) 223715 32604931 5844.pdf 5844.pdf 1 F466ABEEB28B62210E50B0F6E9C82A64 3e7626fef54f90efdca52be2ccdeef876d96f9dd0f23003b8804ae19ecba6cbc cd1687a4-a1b9-11eb-a523-00155dcfd717 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=134044 Fakulteta za strojništvo 0 0 0