Time Difference Gas Ultrasonic Flowmeter Based on Peak to Peak Ratio Fitting
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.
time difference gas ultrasonic flowmeterpeak to peak ratiofeature point extraction
NETL
NSTL
万方数据
