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Applications of digital signal processing methods in TOF calculation of ultrasonic gas flowmeter
Flow Measurement and Instrumentation ( IF 2.2 ) Pub Date : 2021-03-19 , DOI: 10.1016/j.flowmeasinst.2021.101932
Jie Ma , Ke-Jun Xu , Zhen Jiang , Lun Zhang , Hao-Ran Xu

Ultrasonic gas flowmeters (UGFM) are extensively used in petroleum, chemical, natural gas and other fields because of their distinctive measurement advantages. As the core technology of the UGFM, digital signal processing technology determines its measurement accuracy and stability. This paper systematically reviews the signal processing methods for measuring the TOF (time of flight) based on the principle of time difference method. According to the stability of the feature information extracted by different digital signal processing methods, the advantages and disadvantages of each method are analyzed. Aiming at the problems of serious energy attenuation, weak echo signal amplitude, and low signal-to-noise ratio (SNR) when ultrasonic signal propagate in the gas, different signal processing methods are evaluated and compared from the aspects of calculation accuracy, response speed, anti-interference ability and sensitivity to parameter changes. Finally, some improvement ideas and directions for further research are proposed according to the analysis results.



中文翻译:

数字信号处理方法在超声气体流量计TOF计算中的应用

超声波气体流量计(UGFM)由于其独特的测量优势而广泛用于石油,化工,天然气和其他领域。作为UGFM的核心技术,数字信号处理技术决定了其测量精度和稳定性。本文基于时差法的原理,系统地回顾了测量飞行时间(TOF)的信号处理方法。根据不同数字信号处理方法提取的特征信息的稳定性,分析了每种方法的优缺点。针对超声波信号在气体中传播时能量衰减严重,回波信号幅度弱以及信噪比(SNR)低的问题,从计算精度,响应速度,抗干扰能力和对参数变化的敏感性等方面评估和比较了不同的信号处理方法。最后,根据分析结果提出了一些改进思路和进一步研究的方向。

更新日期:2021-03-25
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