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Matematični model ocene negotovosti pri merjenju ravnosti : doktorska disertacijaGusel, AndrejMeritve ravnosti predstavljajo sredstvo za vrednotenje ravnosti merilnih ploščin ostalih površin, ki služijo kot osnova pri meritvah lege in oblike. Kljub poznavanju postopkov, metod in merilne ... opreme za merjenje ravnosti ter kljub vedno novim metodam, ki poskušajo poenostaviti postopek, se vedno pojavljajo isti problemi. En glavnih problemov so vplivni faktorji, ki učinkujejo na meritev. Te vplivne faktorje, še bolj pa njihove učinke na meritev, moramo poznati in biti sposobni ovrednotiti, saj predstavljajo osnovoza določanje negotovosti meritve ravnosti. Vplivni faktorji so na splošno sicer znani, manj znani pa so njihovi vplivi na meritev, kar vpliva naodločitev, katere upoštevati in kako, katere pa lahko zanemarimo oziroma preprečimo. Prej ali slej se soočimo tudi s pomanjkljivostmi obstoječih metod. Večino meritev ravnosti izvajamo po metodi Union Jack, ki poleg vrste prednosti prinaša tudi nekaj pomanjkljivosti. Glavna pomanjkljivost je, da mreža že v osnovi bolj slabo pokrije obravnavano površino. Bolj groba mreža res pohitri postopek merjenja, vendar pa se zato pokritost površine še dodatnozmanjša, s tem pa se nam lahko iz obravnave izmuzne katero od odstopanjpovršine, to pa seveda vpliva na rezultat in negotovost. Zdi se, da bi za bolj drobne nepravilnosti potrebovali bolj gosto mrežo, za večja odstopanja pa bi zadoščala bolj groba mreža. Če torej glede na obliko površine določamo gostoto merilne mreže, gostota merilne mreže pa spet pogojuje stopnjo pokritosti površine, moramo najti odgovor na vprašanje, ki sledi: kako sta povezani oblika površine in negotovost meritve? Ali bi bilo res možno (in smiselno), da bi za različne oblike površin vnaprej definirali različne merilne mreže? Pri odgovoru na te izzive si pomagamo z metodo Monte Carlo. Model meritve služi za osnovo algoritma, s katerim je mogoče preko serije simulacij določiti negotovost meritve. Rezultati za različne merilne mreže, prilagojene obliki površine, kažejo presenetljive izsledke.Type of material - dissertation ; adult, seriousPublication and manufacture - [Maribor : A. Gusel], 2009Language - slovenianCOBISS.SI-ID - 245713920
Link(s):
Digital Library of the University of Maribor – DLUM
Digitalna knjižnica Slovenije - dLib.siDostop z namenskih računalnikov v prostorih NUK
Author
Gusel, Andrej
Other authors
Mudronja, Vedran
Topics
Ravnost |
Merjenje |
Disertacije |
model negotovosti ravnosti |
simulacija ravnosti Monte Carlo |
simulacija merilne plošče
Library/institution |
City | Acronym | For loan | Other holdings |
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Library of Technical Faculties, Maribor | Maribor | KTFMB |
reading room 1 cop.
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National and University Library, Ljubljana | Ljubljana | NUK |
reading room 1 cop.
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University of Maribor Library | Maribor | UKM |
reading room 1 cop.
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Database name | Field | Year |
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Links to authors' personal bibliographies | Links to information on researchers in the SICRIS system |
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Gusel, Andrej | 17180 |
Mudronja, Vedran |
Source: Personal bibliographies
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