Modeling of temperature dependency of structural waves in an ultrasonic flow measurement system

Structural waves transmitted solely through the pipe wall influence the accuracy in a clamp-on ultrasonic flow measurement system because of the superposition with the signals of interest. To improve the measurement against temperature variations, an algorithmic compensation of the structural waves...

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Bibliographic Details
Published inTechnisches Messen Vol. 86; no. 2; pp. 73 - 81
Main Authors Bächle, Matthias, Puente León, Fernando
Format Journal Article
LanguageEnglish
Published De Gruyter Oldenbourg 25.02.2019
Subjects
modeling
Modellierung
Structural waves
Strukturschallwellen
Ultraschall
ultrasound
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Summary:Structural waves transmitted solely through the pipe wall influence the accuracy in a clamp-on ultrasonic flow measurement system because of the superposition with the signals of interest. To improve the measurement against temperature variations, an algorithmic compensation of the structural waves using a temperature model is required. This paper proposes a temperature model for structural waves, using the Matching Pursuit method. In the first section, a sparse signal representation is presented to approximate the structural wave signals. The resulting signal coefficients are used to describe the temperature dependency in a linear model. The method is validated using measurements of structural waves in a circular pipe over a temperature range between and . Based on these measurements, the accuracy of the approximated temperature model is evaluated and compared against the baseline signal-stretch method.
ISSN:0171-8096
2196-7113
DOI:10.1515/teme-2018-0067