20.500.12556/RUL-84261 Določanje stopnje oblačnosti z metodo merjenja temperature neba Determination of cloudiness with the sky temperature measurement method Diplomsko delo obsega fizikalno razlago delovanja detekcije oblakov, izdelavo senzorja oblakov in analizo meritev. Senzor oblakov deluje na principu meritve elektromagnetnega sevanja neba v infrardečem spektru. Pri tem izkorišča Seebeckov termoelektrični pojav. Sestavljajo ga štiri glavne enote, in sicer senzor IR, senzor relativne vlažnosti, modul Wi-Fi ter mikrokrmilnik. Mikrokrmilnik komunicira z vsemi enotami ter obdeluje in posreduje zajete podatke na splet preko modula Wi-Fi. Z baterijskim napajanjem in sončnim panelom je senzor oblakov povsem avtonomna brezžična naprava. Analiza zajetih podatkov senzorja oblakov preko celega leta je pokazala linearno odvisnost izmerjenega IR sevanja v odvisnosti od absolutne vlage v okolici senzorja. Ugotovljena relacija je bila uporabljena pri definiciji parametra jasnosti. Le-ta v vseh letnih časih podaja informacijo ali je nebo nad senzorjem oblakov jasno, oblačno ali dežuje. Verifikacija rezultatov je bila opravljena s primerjavo meritev piranometrov ter slik iz vse-nebnih kamer. Diploma thesis includes description of physical principles for cloud detection, development, of the cloud sensor and analysis of its measurements. Cloud sensor works on a principle of measuring infrared electromagnetic irradiance of the sky. For this purpose it applies Seebeck thermoelectric effect. Cloud sensor consists of four major components, namely the IR sensor, relative humidity sensor, Wi-Fi module and microcontroller. Microcontroller is responsible for communications with all components as well as data analysis and transmission to the Internet via Wi-Fi module. Power is supplied by Li-Ion batteries which are charged with the solar panels, thus it is a fully autonomous, self-sufficient and wireless device. Analysis of obtained cloud sensor measurements reveals linear dependence of measured IR irradiance in relation to absolute humidity in the vicinity of the sensor. These findings were then used at defining clear sky parameter, which determines in all seasons of the year whether sky is clear, cloudy or if it is raining. Results were verified with the pyranometers’ measurements as well as the pictures from all-sky cameras. detekcija oblakov IR sevanje Seebeckov pojav Internet stvari cloud detection IR irradiance Seebeck effect Internet of Things true false false Slovenski jezik Angleški jezik Diplomsko delo 2016-07-22 11:39:19 2016-07-22 11:39:22 2022-08-02 01:05:26 0000-00-00 00:00:00 2016 0 0 0000-00-00 NiDoloceno NiDoloceno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 1970-01-01 34175 Mikuz_Stefan_-_Dolocanje_stopnje_oblacnosti_z_metodo_merjenja_temperature_neba.pdf Mikuz_Stefan_-_Dolocanje_stopnje_oblacnosti_z_metodo_merjenja_temperature_neba.pdf 1 D300AC6510BDD4770B67A2660A59DDA1 af5adf2f2abdbd7ef26e39c63348487e439681a92764c177f567ad410d6040bc e2cf9eef-a1b0-11eb-a523-00155dcfd717 20.500.12556/rul/9ad551a4-39d2-4072-949e-63ac1e69a754 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=87320 Fakulteta za elektrotehniko 0 0 0