Data Integration Method for Multipath Ultrasonic Flowmeter
Data Integration Method for Multipath Ultrasonic Flowmeter
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DOI：
10.1109/jsen.2012.2204738
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发表时间：
2012-09-01
影响因子：
4.3
通讯作者：
Shimizu, Kazuyoshi
中科院分区：
文献类型：
--
作者：
Peng, Lihui;Zhang, Bowen;Shimizu, Kazuyoshi
与单声道超声波流量计相比，多声道超声波流量计能够在管道横截面上提供更精确的平均流速。这是通过整合从多个声道测量得到的流速来完成的。在本文中，我们提出了一种基于数据融合的集成方法来获得管道横截面上的流速估计。多径超声流量计可以通过对所有声道的测量速度进行加权平均，从而得到流体的平均流速。与传统的根据声路几何位置确定权值的积分方法相比，该方法考虑了单个声路上测量速度中的噪声，并根据单个声路上测量速度的方差确定权值。这导致一个融合（集成）流速与最小的均方误差。此外，即使某些声道不能正常工作，所提出的方法仍然可以提供管道横截面上流速的可靠估计。
Compared to ultrasonic flowmeters with a single sound path, multipath ultrasonic flowmeters are capable of providing more accurate mean flow velocities on a cross-section of a pipe. This is accomplished by integrating the flow velocities derived from the measurements on multiple sound paths. In this paper, we proposed a data fusion based integration method to obtain the estimation of flow velocities on a cross-section of a pipe. The multipath ultrasonic flowmeter can provide a mean fluid velocity by taking the weighted average of the measured velocities of all sound paths. Compared to the traditional integration method, in which weights are determined according to the geometrical positions of sound paths, the proposed method considers the noise in the measured velocities on individual sound paths and determines the weights according to the variances of measured velocities on individual sound paths. This leads to a fused (integrated) flow velocity with a minimum mean square error. In addition, even if certain sound paths do not work properly, the proposed method can still provide a robust estimate of flow velocity on a cross-section of a pipe.