Accurate temperature estimation in ultrasonic pulse-echo systems
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 (Refereed)
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.
Research subject Signal Processing; Industrial Electronics
IdentifiersURN: urn:nbn:se:ltu:diva-34449Local ID: 8a754060-8084-11db-9159-000ea68e967bISBN: 2-9521105-0-6OAI: oai:DiVA.org:ltu-34449DiVA: diva2:1007700
World Congress on Ultrasonics : 07/09/2003 - 10/09/2003
Godkänd; 2003; 20061022 (ysko)2016-09-302016-09-30Bibliographically approved