Title :
Velocity dependent characteristics of modulated ultrasonic signal in gas flow
Author :
Niemann, Mathias ; Hans, Volker
Author_Institution :
Inst. of Meas. & Control, Essen Univ., Germany
Abstract :
Natural variations of pressure, density and velocity occuring in streaming fluid modulated ultrasonic signals. The characteristics of modulated ultrasonic signal 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 :
Hilbert transforms; acoustic convolution; acoustic correlation; demodulation; discrete Fourier transforms; flow measurement; flowmeters; signal sampling; ultrasonic applications; ultrasonic measurement; Hilbert transform; cross-correlation flowmeter; demodulation; discrete convolution; flow rate; gas flow measurement; inverse DFT; modulated ultrasonic signals; normal distribution plot; single ultrasonic barrier; streaming fluid; turbulence; undersampling; velocity dependent characteristics; Demodulation; Fluid flow; Fluid flow measurement; Frequency; Sampling methods; Signal analysis; Time measurement; Ultrasonic imaging; Ultrasonic transducers; Ultrasonic variables measurement;
Conference_Titel :
Instrumentation and Measurement Technology Conference, 2001. IMTC 2001. Proceedings of the 18th IEEE
Conference_Location :
Budapest
Print_ISBN :
0-7803-6646-8
DOI :
10.1109/IMTC.2001.928880
