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Detection of, and compensation for error inducing thin layer deposits on an ultrasonic densitometer for liquids
Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Embedded Internet Systems Lab.
2003 (English)In: Proceedings of the 20th IEEE Instrumentation and Measurement Technology Conference: IMTC '03, IEEE Communications Society, 2003, 648-652 p.Conference paper (Refereed)
Abstract [en]

A pulse echo ultrasonic densitometer can measure the acoustic impedance of a liquid by listening to the echo of an acoustic pulse reflected from the densitometer probe and liquid interface. The density of the liquid Is obtained by dividing the acoustic impedance of the liquid and the speed of sound through the liquid. However, thin layer deposits, also known as fouling, on the probe at the liquid interface Introduce errors in the assessment of the liquid's acoustic Impedance and hence in the density estimation. In this paper, we simulate the situation with different types of contaminations at different fouling layer thickness and show that when performing a discrete Fourier transform (DFT) on the echo, the presence of the contaminating layer can be detected while the correct liquid density can be estimated

Place, publisher, year, edition, pages
IEEE Communications Society, 2003. 648-652 p.
Research subject
Industrial Electronics
URN: urn:nbn:se:ltu:diva-38984ScopusID: 37493689Local ID: d8c44c30-547d-11db-9592-000ea68e967bISBN: 0-7803-7705-2OAI: diva2:1012492
IEEE Instrumentation and Measurement Technology Conference : 20/05/2003 - 22/05/2003
Godkänd; 2003; 20061005 (ysko)Available from: 2016-10-03 Created: 2016-10-03Bibliographically approved

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Deventer, Jan Van
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