Measuring and testing – Vibration – By mechanical waves
Patent
1980-06-10
1983-07-05
Ciarlante, Anthony V.
Measuring and testing
Vibration
By mechanical waves
73602, G01N 2900, G01H 924
Patent
active
043911420
ABSTRACT:
A tracking generator 21 is slaved to a spectrum analyzer 23 to produce an input signal having a frequency that follows the frequency of the spectrum analyzer sweeping local oscillator 22. The input signal is gated to a transducer 26 by a transmitter gate 25 to produce ultrasonic waves in the sample 28. The resulting ultrasonic echoes are converted into electrical signals by the transducer and then gated into the spectrum analyzer by receiver gate 29. This arrangement produces spectra that are equivalent to shock-exciting the transducer with a true delta function shock-excitation.
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Hewlett-Packard, 1977 Electronic Instruments and Systems Brochure, Signal Analyzers, Model 141T, 8493A, 8552B.
Cantrell, Jr. John H.
Heyman Joseph S.
Carlson David V.
Ciarlante Anthony V.
King William H.
Manning John R.
Osborn Howard J.
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