2020/01/16 by Leander Claes, Claes, Leander, Carolin Steidl +5
Engineering · #Applied Physics (physics.app-ph) #Electrical and Bioimpedance Tomography #FOS: Physical sciences #Flow Measurement and Analysis #Fluid Dynamics (physics.flu-dyn) #Ultrasonics and Acoustic Wave Propagation
paper · pdf · doi:10.48550/arxiv.2001.05708
openalex publication_date 2020/01/16 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
Most measurement methods based on ultrasound, such as sound velocity,\nabsorption or flow measurement systems, require that the acoustic wave\npropagation is linear. In many cases, linear wave propagation is assumed due to\nsmall signal amplitudes or verified, for example, by analysing the received\nsignal spectra for the generation of harmonic frequency components. In this\ncontribution, we present an approach to quantify occurrence of non-linear\neffects of acoustic wave propagation in ultrasonic measurement systems based on\nthe evaluation of the acoustic Reynolds number. One parameter required for the\ndetermination of the acoustic Reynolds number is the particle velocity of the\nacoustic wave, which is not trivially obtained in most measurement systems. We\nthus present a model-based approach to estimate the particle velocity of an\nacoustic wave by identifying a Mason model from electrical impedance\nmeasurements of a given transducer. The Mason model is then used to determine\nthe transducer's velocity output for a given electrical signal, allowing for an\nevaluation of the acoustic Reynolds number for different target media.\n