Title :
Velocity-dependent characteristics of modulated ultrasonic signal in gas flow
Author :
Niernann, M. ; Hans, Volker
Author_Institution :
Inst. of Meas. & Control, Essen Univ., Germany
fDate :
8/1/2002 12:00:00 AM
Abstract :
Natural variations of pressure, density, and velocity occur in streaming fluid modulated ultrasonic signals. The characteristics of modulated ultrasonic signals in gas flow are strongly dependent on velocity. This paper describes a way to find a velocity-dependent characteristic quality detected in the modulated signal and to determine the flow rate on the basis of signal analysis of only one ultrasonic barrier.
Keywords :
acoustic signal processing; demodulation; flow measurement; ultrasonic measurement; gas flow measurement; modulated ultrasonic signal; signal analysis; signal demodulation; streaming fluid; ultrasonic barrier; velocity-dependent characteristics; Amplitude modulation; Demodulation; Fluid flow; Fluid flow measurement; Frequency; Sampling methods; Signal analysis; Time measurement; Ultrasonic imaging; Ultrasonic variables measurement;
Journal_Title :
Instrumentation and Measurement, IEEE Transactions on
DOI :
10.1109/TIM.2002.802247
