Merjenje temperaturne odvisnosti razširjanja zvočnega vala v okrogli cevi

TAVČAR, ROK (author), Beguš, Samo (mentor), Bojkovski, Jovan (comentor)

Namen tega dela je ovrednotiti več možnih izvedb za izdelavo akustičnega termometra. Akustični termometri imajo kar nekaj prednosti glede na klasične izvedbe, saj so zelo odporni na zunanje motnje. Prav tako pa z njimi merimo posredno preko merjenja časa, kar znamo glede na ostale veličine izmeriti zelo natančno. Cilji s katerim sem dosegel namen tega dela so: pregled obstoječih izvedb, izdelava in testiranje izvedbe za katero sem ugotovili največji potencial. Tako sem izdelal merilnik zakasnitev s pripadajočo mehansko, električno in programsko opremo. Ta izdelani merilnik sem nato testiral v klimatski komori, da sem ugotovil kako dobro deluje in kje so potrebne izboljšave. Skupno sem izvedel še tri nadgradnje merilnika in dvoje testiranj v klimatski komori. Te zastavljene cilje sem dosegel in tudi presegel saj je končni merilnik dosegel rezultate, ki so bilo nad pričakovanji. Prav tako sem z izdelavo tega merilnika zakasnitev dobil veliko izkušenj in idej, kako izdelati in izpopolniti pravi akustični termometer. Prav tako pa sem na poti do cilja odkril kakšne probleme in napake lahko pričakujemo od take vrste merilnikov.

• Language: Slovenian
• Keywords: merjenje, temperatura, akustika, hitrost zvoka
• Work type: Master's thesis/paper
• Organization: FE - Faculty of Electrical Engineering
• Year: 2016
• PID: 20.500.12556/RUL-84476
• Publication date in RUL: 25.08.2016

Secondary language

• Language: English
• Title: Measurement of the temperature dependence of a sound wave propagation in a round pipe

Abstract

The purpose of this work was to evaluate possible designs of acoustical thermometer. Acoustic thermometers have a number of advantages compared with conventional designs. One of them is resistance to most of external disturbance. Another advantage is that they measure temperature indirectly by measuring the time, which can be measured very precisely compared to the other quantities. The goals with which I strived to achieve the purpose of this work are: a review of existing designs, fabrication and testing design in which I found the greatest potential. I made this delay meter and associated mechanical, electrical and software parts. After finishing it, I performed some tests in the climatic chamber, so I could evaluate how well it works and where improvements are needed. In total I made three upgrades to original meter and three tests in the climatic chamber. I have achieved and surpassed set goals as the final meter reached results that were above expectations. With making this meter I got a lot of experience and ideas on how to create and refine a real acoustic thermometer. Also on the way to the finish I discovered problems and errors that can be expected from such a meter in real application.

• Keywords: measurements, temperature, acoustics, speed of sound