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Optimization of a Single Tube Practical Acoustic Thermometer
Rok Tavčar1, Janko Drnovšek1, Jovan Bojkovski1
1Laboratory of Metrology and Quality, Faculty of Electrical Engineering, University of Ljubljana, 1000 Ljubljana, Slovenia.
Sensors (Basel, Switzerland)
|March 14, 2020
Summary
This study details building a reliable practical acoustic thermometer (PAT). It presents speed of sound models, error analysis, and solutions for acoustic signal overlap to improve PAT performance.
Area of Science:
- Physics
- Thermodynamics
- Acoustics
Background:
- Practical acoustic thermometers (PATs) offer a method for temperature measurement.
- Accurate temperature measurement relies on precise acoustic thermometry principles.
Purpose of the Study:
- To address key considerations for designing a reliable single-tube practical acoustic thermometer (PAT).
- To present models for the speed of sound in tubes, incorporating real gas effects and error analysis.
Main Methods:
- Developed models for the speed of sound in tubes, including real gas effects.
- Performed error analysis on the most accurate model using Monte Carlo simulations.
- Investigated acoustic signal overlap and proposed solutions like acoustic signal cancellation and tube length optimization.
Main Results:
- Presented diverse models for speed of sound in tubes, accounting for real gas properties.
- Conducted a thorough error analysis of the most precise model via Monte Carlo simulation.
- Introduced methods to mitigate acoustic signal overlap, enhancing thermometer reliability.
Conclusions:
- Optimizing tube length and employing acoustic signal cancellation are crucial for reliable PAT performance.
- Accurate modeling of the speed of sound, including real gas effects, is essential for practical acoustic thermometry.
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