利用非线性波传播提高超声流量计的精度。

Exploiting nonlinear wave propagation to improve the precision of ultrasonic flow meters.

作者信息

Massaad Jack, van Neer Paul L M J, van Willigen Douwe M, de Jong Nicolaas, Pertijs Michiel A P, Verweij Martin D

机构信息

Delft University of Technology, Department of Imaging Physics, Laboratory of Medical Imaging, Lorentzweg 1, 2628CJ, Delft, The Netherlands.

Delft University of Technology, Department of Imaging Physics, Laboratory of Medical Imaging, Lorentzweg 1, 2628CJ, Delft, The Netherlands; TNO, Department of Acoustics and Sonar, Oude Waalsdorperweg 63, 2597AK, The Hague, The Netherlands.

出版信息

Ultrasonics. 2021 Sep;116:106476. doi: 10.1016/j.ultras.2021.106476. Epub 2021 Jun 2.

DOI:10.1016/j.ultras.2021.106476

PMID:34098419

Abstract

Acoustic wave propagation in ultrasonic flow measurements is typically assumed to be linear and reciprocal. However, if the transmitting transducer generates a sufficiently high pressure, nonlinear wave propagation effects become significant. In flow measurements, this would translate into more information to estimate the flow and therefore a higher precision relative to the linear case. In this work, we investigate how the generated harmonics can be used to measure flow. Measurements in a custom-made flow loop and simulations using the Khokhlov-Zabolotskaya-Kuznetsov (KZK) equation will show that the second harmonic component provides similar transit time differences to those obtained from the fundamental component, their linear combination results in more precise flow measurements compared to the estimations with the fundamental component alone.

摘要

在超声流量测量中，通常假定声波传播是线性且可逆的。然而，如果发射换能器产生足够高的压力，非线性波传播效应就会变得显著。在流量测量中，这将转化为更多用于估计流量的信息，因此相对于线性情况具有更高的精度。在这项工作中，我们研究了如何利用产生的谐波来测量流量。在定制的流量回路中进行的测量以及使用霍克洛娃 - 扎博洛茨卡娅 - 库兹涅佐夫（KZK）方程进行的模拟将表明，二次谐波分量提供的渡越时间差与从基波分量获得的相似，与仅使用基波分量的估计相比，它们的线性组合可实现更精确的流量测量。