基于峰值比拟合匹配的时差式气体超声波流量计
Time Difference Gas Ultrasonic Flowmeter Based on Peak to Peak Ratio Fitting
李斌 1李鹏飞 1陈洁1
作者信息
- 1. 上海大学 机电工程与自动化学院,200444
- 折叠
摘要
时差式气体超声波流量计的回波信号在气体中传播时能量衰减严重,且存在着不同程度的幅值晃动问题.因此如何在幅值晃动的气体回波信号中确定特征点,以准确测量回波信号渡越时间及其顺、逆流渡越时间差,是当前时差式气体超声波流量计信号处理方法的主要研究热点.该文基于超声回波信号的数学模型,研究构建了一种基于峰值比拟合匹配的信号处理方法,利用拟合指标来筛选符合匹配条件的波形.并且通过实际数据验证了该方法的有效性和优越性.
Abstract
The echo signal of the time difference gas ultrasonic flowmeter exhibits severe energy attenuation and vary-ing degrees of amplitude oscillation when propagating in gas.Therefore,how to determine characteristic points in the gas echo signal with amplitude oscillation,in order to accurately measure the transit time of the echo signal and the time difference between forward and backward flow is currently the main research hotspot of signal processing meth-ods for time difference gas ultrasonic flow meters.This article is based on the mathematical model of ultrasound e-cho signals and studies the construction of a signal processing method based on peak ratio fitting matching.The fit-ting index is used to screen waveforms that meet the matching conditions.And the effectiveness and superiority of this method have been verified through actual data.
关键词
时差式气体超声波流量计/峰值比/特征点提取Key words
time difference gas ultrasonic flowmeter/peak to peak ratio/feature point extraction引用本文复制引用
出版年
2024
NETL
NSTL
万方数据