Patent ID: 6298726
Filing Date: 2001-10-09
Classification: A61B,G01N,G01S

Abstract:
An acoustic impedance measuring apparatus for emitting ultrasonic waves to a target measurement object and measuring an acoustic impedance of the target measurement object from ultrasonic waves fed back from the target measurement object, said acoustic impedance measuring apparatus comprising:an ultrasonic transducer; anda pulser circuit that generates a trapezoidal pulse signal to be applied to said ultrasonic transducer;wherein the trapezoidal pulse signal generated by the pulser circuit has a trapezoidal shape having a slope on which a voltage of the pulse signal rises and a slope on which a voltage of the pulse signal falls, and wherein each of the slopes causes vibration of the ultrasonic transducer so as to generate the ultrasonic waves emitted to the target measurement object.