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Accurate temperature estimation in ultrasonic pulse-echo systems
Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Signals and Systems.ORCID iD: 0000-0002-6216-6132
Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Embedded Internet Systems Lab.ORCID iD: 0000-0003-3874-9968
Luleå tekniska universitet.
2003 (English)In: 5th world congress on ultrasonics WCU 2003, Paris: Institut Biomedical des Cordeliers, Université Pierre et Marie Curie , 2003, 1565-1568 p.Conference paper, Published paper (Refereed)
Abstract [en]

Ultrasonic pulse-echo systems are widely used to estimate properties of liquids and gases. A common principle is to use a buffer material (buffer-rod) fixed to the ultrasound transducer. Assuming the acoustic properties of the buffer-rod are known, it is then possible to calculate the acoustic impedance of the unknown material. A problem occurs if the temperature of the buffer-rod changes during the measurements, since the properties of the buffer-rod, such as the acoustic attenuation depends on temperature. If, however, the temperature is recognized, it is possible to compensate for this. In this paper we present a method based on speed of sound changes in the buffer-rod to estimate the temperature. With the resulting model we are able to estimate temperatures in PMMA for the interval 5°C to 60°C with a 0.1 °C accuracy (at a 95% confidence level).

Place, publisher, year, edition, pages
Paris: Institut Biomedical des Cordeliers, Université Pierre et Marie Curie , 2003. 1565-1568 p.
National Category
Signal Processing Other Electrical Engineering, Electronic Engineering, Information Engineering
Research subject
Signal Processing; Industrial Electronics
Identifiers
URN: urn:nbn:se:ltu:diva-34449Local ID: 8a754060-8084-11db-9159-000ea68e967bISBN: 2-9521105-0-6 (print)OAI: oai:DiVA.org:ltu-34449DiVA: diva2:1007700
Conference
World Congress on Ultrasonics : 07/09/2003 - 10/09/2003
Note

Godkänd; 2003; 20061022 (ysko)

Available from: 2016-09-30 Created: 2016-09-30 Last updated: 2017-10-19Bibliographically approved

Open Access in DiVA

fulltext(646 kB)17 downloads
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http://www.sfa.asso.fr/wcu2003/procs/website/articles/000190.pdf

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