METHOD AND APPARATUS FOR CHARACTERIZING REFLECTED ULTRASONIC PULSES

摘要

The invention is a method of and apparatus for characterizing the amplitudes of a sequence of reflected pulses R1, R2 and R3 by converting them into corresponding electrical signals E1, E2 and E3 and thereafter exponentially adjusting the amplitudes of the respective signals E1, E2 and E3 to substantially the same value during each sequence thereby restoring the reflected pulses R1, R2, and R3 to their initial reflection values by means of timing means (12) and (13), an exponential generator (18) and a time gain compensator (16). Envelope and baseline reject circuits (20) and (21) respectively permit the display and accurate location of the time spaced sequence of electric signals having substantially the same amplitude on a measurement scale on a suitable video display or oscilloscope (17).