AUTOMATIC DEFECT SIGNALLING DEVICE FOR ULTRASONIC DETECTOR Russian patent published in 2009 - IPC G01N29/22 

FIELD: instrument making.

SUBSTANCE: automatic defect signaling device for ultrasonic detector contains the peak selector, actuator, synchroniser connected, via the tested zone strobe-pulse front edge shaper, with the trigger first input, the output of the latter being connected with the counter reset input and, via the clock pulse generator, with the counter input and shift register clock input. The shift register output is connected to logic element "AND", while the counter output is connected to the trigger second input. Note that the proposed device additionally incorporates the one-shot multivibrator arranged between the peak selector output and shift register write input, (n-1) m of input logic elements "AND" with their inputs connected to the registers outputs, while outputs of all n logic elements "AND" are connected to logic element "OR", its output being connected to the actuator input.

EFFECT: higher noise immunity and reliability of proposed device of defects, hence, reduced number of its false operations.

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