20.500.12556/RUL-118039 Avtomatizacija krmiljenja pretoka plina v merilnem sistemu z zvočnimi šobami Automation of gas flow rate regulation in the measurement system with sonic nozzles Uporaba merilnega sistema z zvočnimi šobami je razširjena v industriji kot tudi v raziskovalnih laboratorijih. Merilni sistem omogoča natančno nastavljanje in merjenje pretoka plina. Zaradi njegove natančnosti je primeren za umerjanje naprav na področju masnega in volumskega pretoka plina. Nastavljanje željenega pretoka plina skozi zvočne šobe s pomočjo ročnega tlačnega regulatorja je precej zahtevno, zato smo v sklopu diplomske naloge izvedli avtomatizacijo merilnega sistema z zvočnimi šobami. Na podlagi analize delovanja sistema smo nabavili ustrezen elektronski tlačni krmilnik plina. Že obstoječ merilni sistem smo preuredili in vanj vgradili elektronski tlačni krmilnik. Izdelali smo nadzorni program, ki omogoča avtomatizirano nastavljanje željenega masnega pretoka plina. Po opravljenih meritvah smo z željo po višji točnosti delovanja uvedli korekcijo v nadzornem programu. Prišli smo do izboljšane točnosti meritev. Stabilnost sistema se je pri vseh meritvah gibala v željenih mejah. Pridobljene vrednosti so nas pripeljale do zaključka, da je avtomatiziran sistem dovolj stabilen za uporabo v laboratorijske namene. The use of a measuring system with sonic nozzles is widespread in industry as well as in research laboratories. The measuring system allows precise setting and measurement of gas flow. Due to its accuracy, it is suitable for calibration of devices in the field of gas mass and volume flow. Setting the desired gas flow through the sonic nozzles with the help of a manual pressure regulator is quite demanding, so as part of the thesis we performed the automation of the measuring system with sonic nozzles. Based on the analysis of the operation of the system, we purchased a suitable electronic gas pressure controller. The existing measuring system was redesigned and an electronic pressure controller was installed in it. We have created a control program that enables automated setting of the desired gas mass flow. After the measurements, we introduced a correction in the control program with the desire for higher accuracy of operation. We came up with improved measurement accuracy. The stability of the system was within the desired limits for all measurements. The obtained values led us to the conclusion that the automated system is stable enough for use for laboratory purposes. zvočne šobe masni pretok avtomatizacija tlačni regulator stabilnost točnost sonic nozzles mass flow automation pressure regulator stability accuracy true false false [M. Oblišar] Slovenski jezik Angleški jezik Zaključna naloga 2020-08-15 08:30:46 2020-08-15 08:30:52 2023-11-03 13:04:31 0000-00-00 00:00:00 2020 0 Ljubljana 0 XIV, 30 f. 0000-00-00 NiDoloceno NiDoloceno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 532.57:544.277:681.5(043.2) 222486 25385475 5420.pdf 5420.pdf 1 EE4ABEFD0ED55619F303FE9FC04BA509 fcdbfa0bde279c6122859cd8abfd39ecdb48e066f4ff9e8cb94109cf57e1b175 4d2cc8ec-a1b9-11eb-a523-00155dcfd717 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=131972 Fakulteta za strojništvo 0 0 0