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
Poland

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