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Mechanical thermal expansion correction design for an ultrasonic flow meter
Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Embedded Internet Systems Lab.
2007 (English)In: 14th International Flow Measurement Conference 2007, FLOMEKO 2007: Sandton, Gauteng, South Africa, 18 - 21 September 2007, Red Hook: Curran Associates, Inc., 2007, 96-101 p.Conference paper (Other academic)
Abstract [en]

When an ultrasonic flow meter system using the transit time technique is subjected to an increasing ambient or fluid temperature, the material in the meter will expand due to thermal expansion. This will affect the measurements due to a mismatch between the calibrated lengths in the meter system and the true lengths that varies with temperature. This paper incorporates a simple idea to reduce this problem. By the insertion of a compensation body behind the transducers the thermal expansion of this body will work to compensate for the errors due to the expansion in the materials that the flow meter is made of. Simulations have been performed to verify the idea and they show on a high level of compensation for the mentioned errors. Theinfluences from thermal expansions can theoretically be reduced to a negligible level.

Place, publisher, year, edition, pages
Red Hook: Curran Associates, Inc., 2007. 96-101 p.
Research subject
Industrial Electronics
URN: urn:nbn:se:ltu:diva-31543Local ID: 5c379d50-4b14-11dc-ac5f-000ea68e967bISBN: 978-161567802-0OAI: diva2:1004777
International Flow Measurement Conference : 19/09/2007 - 21/09/2007
Godkänd; 2007; 20070815 (emimar)Available from: 2016-09-30 Created: 2016-09-30Bibliographically approved

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Martinson, EmilDelsing, Jerker
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