Calibration of ultrasonic transducers
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United States of America Patent
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Jul 17, 1990
Grant Date -
N/A
app pub date -
Apr 7, 1987
filing date -
Apr 16, 1986
priority date (Note) -
Expired
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Abstract
An ultrasonic test set is calibrated in terms of its frequency characterization by establishing a response trace on a monitor screen of the test set when the probe of the test set is applied to a standard test article, a digitizing camera is arranged for scanning the trace on the test set monitor, and a digital computer receives the digital output signal on the digitizing camera and processes the signal by sampling the signal trace at discrete points with respect to time; the digital computer provides an output on output means such as a monitor screen and/or printer which provides information on the frequency characterization of the ultrasonic test device and includes a frequency spectrum. The apparatus can be implemented by a combination of commercially available and known separate elements providing a cheap and effective apparatus and method for calibration purposes.
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