Multi-wave ultrasonic Doppler method for measuring high flow-rates using staggered pulse intervals
Multi-wave ultrasonic Doppler method for measuring high flow-rates using staggered pulse intervals
复制标题
使用交错脉冲间隔测量高流量的多波超声多普勒方法
DOI：
10.1088/0957-0233/27/2/025303
复制
发表时间：
2016
影响因子：
2.4
通讯作者：
N. Furuichi
中科院分区：
文献类型：
--
作者：
Ei Muramatsu;H. Murakawa;K. Sugimoto;H. Asano;N. Takenaka;N. Furuichi
超声脉冲多普勒法（UDM）可以获得沿超声波束路径的速度分布。但UDM的测量体积较大，测量体积对测量精度的影响是众所周知的。在本研究中，测量体积对速度和流量测量的影响进行了分析和实验评估。为了分析由于测量体积造成的速度误差，使用UDM测量的速度被认为是测量体积上的整体平均值，而流速则是通过对管道上的速度剖面进行积分来计算的。分析结果表明，通道宽度，即沿超声光束轴的空间分辨率，而不是超声光束直径，对流量测量有很大的影响。为了提高流量测量的精度，提出了一种利用两个不同基频的压电元件组成的多波超声换能器来减小管道流近壁区测量体积的新方法。近壁区域的速度分布使用直径较小的8mhz传感器测量，而远离传感器的速度分布使用多波传感器中的空心2mhz传感器测量。利用国家先进工业科学技术研究院（AIST）的水流量校准设备，对多波传感器的适用性进行了实验研究。结果表明，流量误差在- 1%以下，而多波法对于测量大直径管道中的高流量特别有效。
The ultrasonic pulsed Doppler method (UDM) can obtain a velocity profile along the path of an ultrasonic beam. However, the UDM measurement volume is relatively large and it is known that the measurement volume affects the measurement accuracy. In this study, the effect of the measurement volume on velocity and flow rate measurements is analytically and experimentally evaluated. The velocities measured using UDM are considered to be ensemble-averaged values over the measurement volume in order to analyze the velocity error due to the measurement volume, while the flow rates are calculated from the integration of the velocity profile across the pipe. The analytical results show that the channel width, i.e. the spatial resolution along the ultrasonic beam axis, rather than the ultrasonic beam diameter, strongly influences the flow rate measurement. To improve the accuracy of the flow rate, a novel method using a multi-wave ultrasonic transducer consisting of two piezo-electric elements with different basic frequencies is proposed to minimize the size of the measurement volume in the near-wall region of a pipe flow. The velocity profiles in the near-wall region are measured using an 8 MHz sensor with a small diameter, while those far from the transducer are measured using a hollow 2 MHz sensor in the multi-wave transducer. The applicability of the multi-wave transducer was experimentally investigated using the water flow-rate calibration facility at the National Institute of Advanced Industrial Science and Technology (AIST). As a result, the errors in the flow rate were found to be below −1%, while the multi-wave method is shown to be particularly effective for measuring higher flow rates in a large-diameter pipe.
采用超声波脉冲多普勒法评估管道表面粗糙度和管道弯头对仪表系数精度的影响
DOI：
--
发表时间：
2008
期刊：
Journal of Nuclear Science and Technology 45
影响因子：
--
作者：
K.Tezuka;M.Mori;T.Suzuki;M. Aritomi;H.Kikura and Y.Takeda,
通讯作者：
H.Kikura and Y.Takeda,
影响因子：
2.2
作者：
Murakawa, Hideki;Kikura, Hiroshige;Aritomi, Masanori
通讯作者：
Aritomi, Masanori
测量体积对超声多普勒法湍流测量的影响
DOI：
--
发表时间：
2004
期刊：
Experiments in Fluids 36-1
影响因子：
--
作者：
H.KIKURA;YAMANAKA;H.MURAKAWA;M.ARITOMI
通讯作者：
M.ARITOMI