ULTRASONIC VECTOR VELOCITY-MEASUREMENT BY PROJECTION COMPUTED VELOCIMETRY

A new method of measuring complete vector components of target velocit y is proposed. This method makes it possible to measure target velocit y components both along and transverse to the beam axis in two steps. The first step is Fourier transformation of the received signals in th e direction of the time-axis (the ultrasonic pulse emission number). T he second step is projection integration in the polar-axis direction. These two steps provide the two velocity components along and transver se to the beam axis. The new method is similar to the Computed Velocim etry method (CV) proposed previously by the authors, except that it do es not require Fourier transformation in the polar-axis direction. The theory for this method and results of numerical simulation are presen ted.