Measuring and testing – Vibration – By mechanical waves
Patent
1988-06-16
1991-04-09
Williams, Hezron E.
Measuring and testing
Vibration
By mechanical waves
12866101, 36441325, G01N 2900
Patent
active
050054198
ABSTRACT:
A method and apparatus for improved digital processing of the analog echo signals in a coherent imaging system is described which simplifies the channel circuitry requirements. The analog echo signals detected with a phased array of transducer elements are first compressed in a non-linear manner then expanded non-linearly with analog-to-digital converter means to provide increased instantaneous dynamic range in the overall system. Representative phased array coherent imaging systems having the improved digital processing means are also disclosed.
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Crawford Carl R.
Karr Steven G.
O'Donnell Matthew
Pelc Norbert J.
Welles II Kenneth B.
Arana Louis M.
General Electric Company
McDevitt John F.
Williams Hezron E.
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