Scan assembly and method for signal discrimination

Details Scan assembly and method for signal discrimination Scan assembly and method for signal discrimination

1995-07-03

1997-07-15

Williams, Hezron E.

Measuring and testing

Vibration

By mechanical waves

73623, 73609, G01N 2906, G01N 2910

Patent

active

056486138

ABSTRACT:
A method and apparatus for discriminating a valid return pulse from noise in a return signal received by an ultrasonic transducer in response to an interrogating pulse transmitted into a wall of a gas pipe by an ultrasonic transducer of a scan assembly. A discriminator is provided to compare the return signal with adjustable reference voltage thresholds which are continually adjusted by a discriminator computer in accordance with the noise characteristics of the return signal.

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