Ultrasonic vector velocity measurement by projection Computed Velocimetry

Abstract

A new method of measuring complete vector components of target velocity is proposed. This method makes it possible to measure target velocity components both along and transverse to the beam axis in two steps. The first step is Fourier transformation of the received signals in the direction of the time-axis (the ultrasonic pulse emission number). The second step is projection integration in the polar-axis direction. These two steps provide the two velocity components along and transverse to the beam axis. The new method is similar to the Computed Velocimetry method (CV) proposed previously by the authors, except that it does not require Fourier transformation in the polar-axis direction. The theory for this method and results of numerical simulation are presented. >