Provjera točnosti 1D mjernog uređaja

master's thesis

• Title (english): Accuracy verification of a 1D measuring device
• Author: Antonela Šuća
• Mentor: Vedran Šimunović (mentor)
• Granter: University of Zagreb; Faculty of Mechanical Engineering and Naval Architecture; Zagreb
• Defense date and country: 2024-01-25, Croatia
• Scientific / art field, discipline and subdiscipline: TECHNICAL SCIENCES; Mechanical Engineering

Abstract

Tema ovog rada je provjera točnosti 1D uređaja za mjerenje duljine do 3 metra. Ovakvi uređaji koriste se za umjeravanje etalona duljine kao što su štapni kontrolnici, mjerni prsteni ili dugačke granične mjerke.

U prvom dijelu rada detaljno je opisan način rada inteferometra, zatim laserski interferencijski sustav Renishaw ML10 te način mjerenja pomaka upotrebom linearne optike.

U eksperimentalnom dijelu razmatrala su se dva različita postava mjerenja tj. različit razmještaj mjerne optike na 1D mjernom uređaju. Izvršene su tri vrste mjerenja. Prvo preliminarno mjerenje provedeno je samo kao testno mjerenje za ispitivanje prikladnosti prvog postava laserskog sustava, ali s obzirom na kompliciranost mjernog procesa i samo njegovo trajanje taj pristup se pokazao nezadovoljavajućim te se odbacio kao primjeren za ovu namjenu.

U drugoj mjernoj konfiguraciji izvršen je ciklus od pet jednosmjernih mjerenja s razmakom od 200 mm. Koristeći dobivene rezultate provedena je analiza točnosti korištenjem norme za određivanje točnosti i ponovljivosti pozicioniranja.

Konačno, u istoj konfiguraciji, proveden je ciklus od tri jednosmjerna mjerenja s razmakom od 100 mm kako bi se utvrdila greška očitanja mjernog uređaja sa što gušćim razmakom. Dobiveni rezultati pokazuju određeni linearni pomak koji se može pripisati nestabilnosti temperaturnih uvjeta okoliša.

Abstract (english)

The topic of this paper is the accuracy verification of a 1D length measurement device up to 3
meters. Such devices are used for calibrating length standards like bar gauges, measuring rings,
or long gauge blocks.
The first part of the paper provides a detailed description of the interferometer's operation, the
Renishaw ML10 laser interference system, and the method of displacement measurement using
linear optics.
In the experimental section, two different measurement setups were considered, meaning
different arrangements of measurement optics on the 1D measuring device. Three types of
measurements were conducted. The first preliminary measurement was carried out solely as a
test measurement to assess the suitability of the initial laser system setup. However, due to the
complexity of the measurement process and its duration, this approach proved unsatisfactory
and was discarded for this purpose.
In the second measurement configuration, a cycle of five unidirectional measurements with a
spacing of 200 mm was performed. Using the obtained results, an accuracy analysis was
conducted using the standard for determining accuracy and repeatability of positioning.
Finally, in the same configuration, a cycle of three unidirectional measurements with a spacing
of 100 mm was carried out to determine the reading error of the measuring device with a denser
spacing. The results obtained indicate a certain linear shift attributed to the instability of
environmental temperature conditions.

• Keywords: interferometar; linearnost; mjerenje duljine; optika; laser; odstupanje
• Keywords (english): interferometer; linearity; length measurement; optics; laser; deviation
• Language: croatian
• URN:NBN: urn:nbn:hr:235:323677
• Study programme: Title: Mechanical Engineering; Study programme type: university; Study level: graduate; Academic / professional title: magistar/magistra inženjer/inženjerka strojarstva (magistar/magistra inženjer/inženjerka strojarstva)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Open access
• Created on: 2024-01-24 15:01:36