Signal processing method for flight time measurement of gas ultrasonic flowmeter

被引：0

作者：

Zheng, Dandan ^{[1
]}

Mei, Jianqiang ^{[2
]}

Mao, Yang ^{[1
]}

Yang, Zhibin ^{[1
]}

机构：

[1] Tianjin Univ, Sch Elect & Informat Engn, Tianjin, Peoples R China

[2] Tianjin Univ Technol & Educ, Sch Elect Engn, Tianjin, Peoples R China

来源：

2021 IEEE INTERNATIONAL INSTRUMENTATION AND MEASUREMENT TECHNOLOGY CONFERENCE (I2MTC 2021) | 2021年

基金：

中国国家自然科学基金;

关键词：

time of flight; gas ultrasonic flowmeter; double-threshold method; THRESHOLD;

D O I：

10.1109/I2MTC50364.2021.9459938

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

Gas ultrasonic flowmeters are widely applied in industry because of high accuracy. The time of flight (TOF) measurement is significant which determines the flowmeter performance. The traditional TOF method are easily influenced by unstable flow and noise that leads to bad results especially in large velocities. In this paper, a new signal processing method based on the double-threshold method is proposed. The peak's characteristics of the received signal are used to find the feature point on the received signal, and then using this feature point and the zero-crossing detection to complete the calculation of TOF. By comparing the new method with other traditional method based on flow experiments, higher precision and reliability are obtained. And the calibration test results show that the flowmeter can achieve 1% measurement error in the wide flowrate range from 1m/s to 35m/s.

引用

页数：6

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