Signal processing technique for ultrasonic inspection

Details Signal processing technique for ultrasonic inspection Signal processing technique for ultrasonic inspection

1979-12-26

1981-12-29

Kreitman, Stephen A.

Measuring and testing

Vibration

By mechanical waves

73620, G01N 2904

Patent

active

043076165

ABSTRACT:
Disclosed is a correlation receiver for processing an elctrical signal derived from an acoustic signal in a test object, including a signal generator for producing a reference waveform, a multiplier for combining the electrical signal and the reference waveform, an inegrator for integrating the combined signal, and a sample and hold circuit for detecting and holding the output of the integrator. In another embodiment, the signal generator also produces a second reference waveform in quadrature with the first reference waveform, and the receiver further inclues a second multiplier for combining the electrical signal and the second reference waveform, a second integrator for integrating the combined signal, and a means for combining the integrated first and second combined signals to produce an output indicating the structural integrity of the test object.

REFERENCES:
patent: 3850028 (1974-11-01), Thompson et al.
patent: 4104922 (1978-08-01), Alers et al.
patent: 4127035 (1978-11-01), Vasile
patent: 4184374 (1980-01-01), Thompson et al.

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