Accession Number : ADD017261

Title :   Ultrasonic Test System.

Descriptive Note : Patent, Filed 13 Oct 93, patented 23 Aug 94,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s) : Smith, Anthony ; Goff, Dan ; Kruchowy, Roman ; Rhoads, Carl

Report Date : 23 Aug 1994

Pagination or Media Count : 62

Abstract : An ultrasonic system for determining the quality of concrete under water without inaccuracies caused by electromagnetic interference from the ultrasonic generator. An ultrasonic generator applies pulses to the concrete. An ultrasonic detector detects the ultrasonic pulses and produces corresponding signals that are indicative of ultrasonic pulses that have passed through the material. Signal processing circuitry processes the signals to determine the transit time of the ultrasonic pulses through the material. The signal processing circuitry is disabled for a predetermined time after application of each ultrasonic pulse to the material to prevent noise produced by the means for applying ultrasonic pulses to the material from entering the signal processing circuitry and causing spurious measurements.

Descriptors :   *CONCRETE, *ULTRASONICS, *ULTRASONIC TESTS, *PATENTS, SIGNAL PROCESSING, DENSITY, MODULUS OF ELASTICITY, ELECTROMAGNETIC INTERFERENCE, TRANSDUCERS, CIRCUITS, ACOUSTIC VELOCITY, POISSON RATIO, ACOUSTIC TRANSMITTERS, POWERR SUPPLIEES

Subject Categories : Ceramics, Refractories and Glass
      Construction Equipment, Materials & Supplies

Distribution Statement : APPROVED FOR PUBLIC RELEASE