A matrix model for ultrasonic source calibration and radiation field prediction using a pulsed planar scanning system

In this study, a matrix model, relating the particle velocity distribution of the excited source transducer's surface to the pressure distribution in the radiation field: has been formulated. An automated, pulsed, planar scan ning system has been developed using a hydrophone probe with a radius of 0. 25 mm. In order to make the pulsed wave scanning equivalent to continuous w ave scanning, rye used a temporally short excitation pulse of the form exp [-(t - tau)(6)/sigma(6)] containing a plateau zone. The model used in the f irst place for the transducer calibration to obtain the particle velocity d istribution, then its profile was reversely used to calculate of the radiat ion field. The good agreement between the predictions and the experimental data support the validation of the matrix model and the preciseness of the pulsed planar scanning system. Graphical analyses of the experimental data resulted in the performance parameters of the source transducer such as the effective area, the beam divergence angle, the symmetry of the radiation b eam, and the radiation conductance.