Measuring and testing – Vibration – By mechanical waves
Patent
1996-09-13
1998-11-17
Williams, Hezron E.
Measuring and testing
Vibration
By mechanical waves
73625, 73628, 73611, 73612, 364508, 364550, G01N 2904
Patent
active
058378995
ABSTRACT:
An ultrasonic testing system can receive data from at least two ultrasonic transducers and process the data in parallel to each other. The testing system can compress the data by a fixed ratio by storing the value of the sample having the highest-amplitude out of a group of samples. The testing system can also provide threshold-based run-length encoding by compressing data by only storing samples which exceed a user-defined threshold value as well as a user-defined range of samples surrounding said samples. The ultrasonic testing system also provides a hardware gate for storing a peak amplitude and associated time-of-flight for a user-defined interval and a gate for storing the time-of-flight for the first excursion of the data through a user-defined threshold and interval. The operation of these gates or the storage of waveform data may be delayed by a constant delay or until the data exceeds a user-selectable threshold during a user-selectable time interval. The system also provides a multi-channel design allowing simultaneous waveform and/or hardware gate acquisition of data on more than one channel and permitting the parallel processing of data.
REFERENCES:
patent: 4173898 (1979-11-01), Forstermann et al.
patent: 4222275 (1980-09-01), Sholl et al.
patent: 4234937 (1980-11-01), Eggleton et al.
patent: 4970637 (1990-11-01), Sato
patent: 5555180 (1996-09-01), Hilger et al.
Camerlin Marc A.
Dickerman Robert L.
Klein Stanley
Leonard David S.
Martin Michel St.
Combustion Enginineering, Inc.
Kananen Ronald P.
Miller Rose M.
Mulholland John H.
Williams Hezron E.
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