Apparatus for performing ultrasonic measurements

Measuring and testing – Vibration – By mechanical waves

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G01N 2900

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active

049613464

ABSTRACT:
An apparatus for performing ultrasonic measurements of compliant material specimens includes a pair of facing but spaced apart ultrasonic transducers between which the specimen is placed, and which transmits signals into the specimen and receives signals from the specimen, a structure which presses the transducers against the opposite surfaces of the specimen with a reproducibly controllable force so that the same compressive force may be applied for successive measurements, a gauge that measures the separation of the two transducers, and a controller which drives the transmitting transducer and receives the signals from the receiving transducer. The apparatus permits the determination of comparable ultrasonic properties for different points on one specimen, and the determination of comparable properties of a number of specimens, by making the measurements under identical conditions. The apparatus can be provided in a hand-held form and in a form used for inspections when only one side of the specimen is accessible.

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