Design and Implementation of an Ultrasonic Flowmeter Based on the Cross-Correlation Method

被引:25
作者
Ren, Rui [1 ]
Wang, Hongliang [1 ]
Sun, Xiaolei [1 ]
Quan, He [1 ]
机构
[1] North Univ China, Natl Key Lab Elect Measurement Technol, Key Lab Instrumentat Sci & Dynam Measurement, Minist Educ, Taiyuan 030051, Peoples R China
关键词
ultrasonic flowmeter; cross-correlation method; finite element simulation; ultrasonic time of flight; SENSOR;
D O I
10.3390/s22197470
中图分类号
O65 [分析化学];
学科分类号
070302 ; 081704 ;
摘要
Ultrasonic flowmeters play an important role in industrial production, aerospace and other fields. In this paper, a high-precision ultrasonic flowmeter based on the cross-correlation method is designed, and the commercial finite element software COMSOL Multiphysics 5.6 is used to simulate the propagation process of ultrasonic waves during flow measurement, and the implementation process of the cross-correlation algorithm is simulated by Python language. The flowmeter adopts the cross-correlation algorithm to improve the measurement accuracy of ultrasonic time of flight and adopts the method of combining FPGA and an embedded microprocessor to improve operation efficiency. In order to verify the performance of the flowmeter, we tested the flowmeter on the National Institute of Metrology and the self-built test platform, using the still water dragging method, the dynamic volume method and the field comparison method, respectively. The results show that the flowmeter has the ability to test the flow under the condition of high flow velocity (26 m/s) and a pipe diameter in the range of DN6 similar to DN1600, that the absolute value of the relative indication error does not exceed 0.815% and that the repeatability does not exceed 0.150%. The designed ultrasonic flowmeter has high measurement accuracy, good repeatability, strong stability and a wide application range.
引用
收藏
页数:21
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