Archives of Acoustics, 15, 3-4, pp. 499-514, 1990

Pseudorandom ultrasonic Doppler meter of liquid flow and profile with digital serial signal processing

Z. Trawiński
Ultrasonic Department, Institute of Fundamental Technological Research, Polish Academy of Sciences, 00-049 Warszawa, Świętokrzyska 21

D. J. Cathignol
Institut Nationale de la Sante et de la Recherche Medicale, Unite 281, 151 Cours Albert Thomas, 69003 Lyon, France

This paper presents a new method and new ultrasonic device for "real-time" measuring velocity profiles of liquid flow in vessel. Previously a flowmeter with pseudorandom coding of the transmitted signal made it possible to measuring point on a precisely determined depth with respect to the position of the ultrasonic probe. In order to obtain data for the cntirc pcnctration depth of the ultrasonic beam with that method, a system consisting or so many delay-receiving systems as there is measuring points, in which we need data for, would have be built. While the presend original method only one onc trallsmit¬ting-recciving system, enabling a measurement in all measuring points independently and at the same time.
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