FIELD: physics.
SUBSTANCE: ultrasonic device of controlling the state of products consisting of a pulse generator connected to one or more emitting acoustic transducers placed on the surface of the product, having one or more foster acoustic transducers, each of which is connected to a bandpass frequency filter with a series-connected pre-amplifier, an analogue-to-digital converter, a computer with a monitor displaying the output, a unit of recording acoustic signals, a unit for computing the crosscorrelation functions, a unit of calculating the correlation coefficients, an amplitude discriminator according to the level of the correlation coefficient, and a danger signal generator.
EFFECT: increasing the reliability of controlling the results obtained with a reduced number of used acoustic radiating and receiving transducers.
1 dwg
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