20.500.12556/RUL-130071 Zasnova metode merjenja neznane notranje prostornine z referenčnim telesom Design of a method for measuring the unknown internal volume with a reference body Za določevanje notranje prostornine, predvsem teles s kompleksnimi notranjimi prostorninami, se uporabljajo različne merilne metode. Dober primer za takšna telesa je metoda po principu raztezanja plina. V tej metodi neznano notranjo prostornino povežemo z znano referenčno notranjo prostornino. Prostornino določimo s tlačnimi razmerji, ki nastanejo med ločeno in povezano povezavo v sistemu. Problem nastane pri določevanju referenčnega volumna, pri katerem je lahko njegova notranja prostornina zaradi zaokrožitev robov težko določljiva. Zato se za referenčno vrednost lahko vzame znano referenčno telo, ki je glede prostornine, katero zavzema, lažje določljivo. Tako lahko določimo hkrati dve neznani notranji prostornini z eno znano zunanjo prostornino. V eksperimentalnem delu diplomske naloge sem tako zasnoval merilni sistem z večjim številom referenčnih teles. Zanimala me je končna merilna negotovost ter vpliv števila vstavljenih referenčnih teles na končno negotovost dobljenih rezultatov. Dosegel sem negotovost rezultata znotraj 2,1 % in 2,4 %. Ugotovil sem, da je stabilnost temperature in velikost referenčnega telesa, najvišji vpliv na končno negotovost rezultatov izmerjenih volumnov. Various measurement methods are used to determine the internal volume, especially of bodies with complex internal volumes. A good example of such bodies is the gas expansion method. In this method, the unknown internal volume is related to the known reference internal volume. The volume is determined by the pressure ratios formed between the separate and connected connection in the system. The problem arises in determining the reference volume, where its internal volume can be difficult to determine due to the rounding of the edges. Therefore, a known reference body can be taken as a reference value, which is easier to determine in terms of the volume it occupies. Thus, we can determine two unknown internal volumes at the same time with one known external volume. In the experimental part of the diploma thesis, I designed a measuring system with a larger number of reference bodies. I mainly was interested in the final measurement uncertainty and the influence of the number of inserted reference bodies on the final uncertainty of the obtained results. I achieved an uncertainty of the result within 2,1 % and 2,4 %. I found that the temperature stability and the size of the reference body are the highest influence on the final uncertainty of the results of the measured volumes. neznana prostornina merilna negotovost referenčno telo metoda raztezanja plina unknown volume measurement uncertainty reference body gas expansion method true false false [I. Pezdirc] Slovenski jezik Angleški jezik Diplomsko delo/naloga 2021-09-10 08:32:47 2021-09-10 08:32:48 2023-11-29 13:03:29 0000-00-00 00:00:00 2021 0 Ljubljana 0 XXII, 42 str. 0000-00-00 NiDoloceno NiDoloceno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 1970-01-01 542.3:531.7:53.088.3(043.2) 233481 77148675 10590.pdf 10590.pdf 1 32A1AEBCA1692735025FBCEF3DA0BF16 3fd4f3697a08b03c09c49beabfe3d042e1f0788fbdcdf041ac596221a13a64ca ab6c62d9-1200-11ec-a523-00155dcfd717 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=147126 Fakulteta za strojništvo 0 0 0