Patent ID: 8522615

Claim:
An apparatus for measuring porosity of a structure, comprising: an ultrasonic transducer device configured to be pressed against a structure, the structure having a front surface and a back surface, the ultrasonic transducer device being further configured to emit ultrasonic pulses into the structure through the front surface and detect echo profiles; and an electronic device including: a manager having an interface gate adapted to cover a front surface ultrasonic pulse entering the front surface of the structure, a back-surface sensing gate adapted to cover an interval from beyond the front surface of the structure to an end point far out in time, a back surface analysis gate adapted to center over the back surface of the structure and define limits of a signal capture, and a frequency-bandwidth discriminator adapted to isolate a frequency bandwidth in a back surface echo signal captured by the back surface analysis gate and measure a reference amplitude of the frequency bandwidth; a pulse generator interfacing with the manager and the ultrasonic transducer device; a data acquisition device interfacing with the ultrasonic transducer device and the manager; and a display having a porosity indicator interfacing with the manager.