Mjerna nesigurnost u kontaktnoj termometriji

undergraduate thesis

• Title (english): Measurement uncertainty in contact thermometry
• Author: Filip Jurić
• Mentor: Davor Zvizdić (mentor)
• Granter: University of Zagreb; Faculty of Mechanical Engineering and Naval Architecture; Zagreb
• Defense date and country: 2015-09-23, Croatia
• Scientific / art field, discipline and subdiscipline: TECHNICAL SCIENCES; Mechanical Engineering; Process Energy Engineering

Abstract

U radu su opisane vrste termometara u kontaktnoj termometriji i prikazane su metode za procjenu mjerne nesigurnosti mjerenja. Posebno je opisan utjecaj provođenja topline kroz tijelo termometra, utjecaj izmjene topline termometra konvekcijom i utjecaj izmjene topline zračenjem termometra s okolinom na mjernu nesigurnost. Prikazan je zajednički utjecaj više parametara na mjernu nesigurnost temperature za dispozicije termometra u raznim proračunskim uvjetima. Nakon obrade teorijskog dijela izveden je eksperimentalni rad.

U eksperimentalnom dijelu, koji je izveden u Laboratoriju za procesna mjerenja, Fakulteta strojarstva i brodogradnje, Sveučilišta u Zagrebu, ispitan je utjecaj emisijskog faktora površine termometra na mjernu nesigurnost temperature. Prije izvođenja eksperimentalnog rada platinski otpornički termometri su umjereni u kupki s etalonom. Na kraju je prikazana usporedba između procjene rezultata i rezultata dobivenih mjerenjem.

Abstract (english)

In this paper therometeres in contact thermometry are defined and methods of evaluating measurement uncertainty are presented. Especially are described effect of heat conduction through body of thermometer, effect of heat convection and effect of thermometer radiation with ambient on measurement uncertainty. Combined effect of several parameters on temperture measurement uncertainty for thermometer dispositions in different estimate procedures is presented. After processing the theoretical part, experimental work is performed.
In experimental part, which was performed in Laboratory for Process Measurement, Faculty of Mechanical Engineering and Naval Architecture, University of Zagreb, effect of emissivity of the thermometer surface on temperature measurement uncertainty is tested. Before the execution of the work, platinum resistance thermometers are calibrated in owerflow bath with standard thermometer. At the end, comparison between evaluated results and experimental results is presented.

• Keywords: mjerna nesigurnost; temperatura; kontaktna termometrija; utjecaj zračenja
• Keywords (english): measurement uncertainty; temperature; contact thermometry; effect of radiation
• Language: croatian
• URN:NBN: urn:nbn:hr:235:987479
• Study programme: Title: Mechanical Engineering; Study programme type: university; Study level: undergraduate; Academic / professional title: sveučilišni/a prvostupnik/ prvostupnica (baccalaureus/baccalaurea) inženjer/inženjerka strojarstva (sveučilišni/a prvostupnik/ prvostupnica (baccalaureus/baccalaurea) inženjer/inženjerka strojarstva)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Open access
• Created on: 2019-05-22 14:34:06