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master's thesis
Mjerna sposobnost optičkog sustava za očitanje veličine otiska tvrdoće
Zagreb: University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture, 2016. urn:nbn:hr:235:903245
Grlić, Danijel
University of Zagreb
Faculty of Mechanical Engineering and Naval Architecture

Institutional repository: Repository of Faculty of Mechanical Engineering and Naval Architecture University of Zagreb

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Grlić, D. (2016). Mjerna sposobnost optičkog sustava za očitanje veličine otiska tvrdoće (Master's thesis). Zagreb: University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture. Retrieved from https://urn.nsk.hr/urn:nbn:hr:235:903245

Grlić, Danijel. "Mjerna sposobnost optičkog sustava za očitanje veličine otiska tvrdoće." Master's thesis, University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture, 2016. https://urn.nsk.hr/urn:nbn:hr:235:903245

Grlić, Danijel. "Mjerna sposobnost optičkog sustava za očitanje veličine otiska tvrdoće." Master's thesis, University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture, 2016. https://urn.nsk.hr/urn:nbn:hr:235:903245

Grlić, D. (2016). 'Mjerna sposobnost optičkog sustava za očitanje veličine otiska tvrdoće', Master's thesis, University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture, accessed 11 August 2024, https://urn.nsk.hr/urn:nbn:hr:235:903245

Grlić D. Mjerna sposobnost optičkog sustava za očitanje veličine otiska tvrdoće [Master's thesis]. Zagreb: University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture; 2016 [cited 2024 August 11] Available at: https://urn.nsk.hr/urn:nbn:hr:235:903245

D. Grlić, "Mjerna sposobnost optičkog sustava za očitanje veličine otiska tvrdoće", Master's thesis, University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture, Zagreb, 2016. Available at: https://urn.nsk.hr/urn:nbn:hr:235:903245

Metadata
TitleMjerna sposobnost optičkog sustava za očitanje veličine otiska tvrdoće
Title (english)Measurement capability of an optical system for reading the hardness indentation
AuthorDanijel Grlić
MentorŽeljko Alar (mentor)
GranterUniversity of Zagreb
Faculty of Mechanical Engineering and Naval Architecture
Zagreb
Defense date and country2016-12-08, Croatia
Scientific / art field,
discipline and subdiscipline		TECHNICAL SCIENCES
Mechanical Engineering
Abstract
Mjerenje tvrdoće je jednostavan postupak, ali nepoznavanje faktora koji utječu na mjerenje tvrdoće može prouzrokovati velike nesigurnosti. Sustav za mjerenje veličine otisaka tvrdoće kod Vickersove metode jedan je od tih faktora, tj. najznačajniji izvor nesigurnosti mjerenja. U radu su opisani sustavi za mjerenje veličine otisaka tvrdoće kod Vickersove metode, te jedan sustav u razvoju, sustav LIMS 320/HV. Navedeni su njegova konstrukcija i karakteristike. Proveli su se postupci podešavanja i direktnog umjeravanja sustava LIMS 320/HV. Podešavalo se namještanjem duljine podešavanja pri povećanjima 5x, 10x, 20x i 40x pomoću mjernih skala te su kao rezultati dobiveni faktori podešavanja. Sustav se umjeravao pomoću mjernih skala čime se prikazala mjerna nesigurnost sustava. Analizom rezultata su dobivene mjerne sposobnosti za svako povećanje i ukupna mjerna sposobnost sustava izražena eksponencijalnom jednadžbom. Usporednim mjerenjem referentnih otisaka na referentnim etalonskim pločicama (IN45180G-461,9HV1, 33P1825-204,4HV20 i IN6807G-808,7HV50) potvrđeno je da je sustav primjenjiv za veličine dijagonala iznad 0,2 (ili 0,3) mm, dok je za vrijednosti ispod 0,2 mm mjerna nesigurnost velika.
Abstract (english)
Hardness measurement is a simple procedure, but lack awareness of factors that affect hardness measurement can lead to large uncertainty. Indentation measurement systems for Vickers hardness method is one of those factors, i.e. most significant source of measurement uncertainty. In this paper, indentation measurement system for Vickers method are described, and one who is in development, system LIMS 320/HV. His structure and characteristics are described. Procedures of alignment and direct calibration were conducted on system LIMS 320/HV. Alignment was made with adjustment of alignment length on magnifications of 5x, 10x, 20x and 40x with stage micrmeters and obtained results were alignment factors. Calibration of system was made with stage micrometer which showed measurement uncertainty. Results were analyzed and gave calibration and measurement capability for every magnification and total calibration and measurement capability of system, expressed in exponencial equation. Comparative measurement of reference indents on a standard reference blocks (IN45180G-461,9HV1, 33P1825-204,4HV20 and IN6807G-808,7HV50) confirmed that the system is effective for the size of the indent diagonal above the 0.2 (or 0.3) mm, while for values below 0.2 mm measurement uncertainty is high.
Keywords
Keywords (english)
Languagecroatian
URN:NBNurn:nbn:hr:235:903245
Study programmeTitle: Mechanical Engineering
Study programme type: university
Study level: graduate
Academic / professional title: magistar/magistra inženjer/inženjerka strojarstva (magistar/magistra inženjer/inženjerka strojarstva)
Type of resourceText
File originBorn digital
Access conditionsOpen access
Terms of useLicence In copyright icon
Created on2019-05-22 18:15:02