G - Physics – 01 – N
Patent
G - Physics
01
N
G01N 29/06 (2006.01) A61B 8/00 (2006.01) G01S 7/52 (2006.01)
Patent
CA 2102403
2102403 9221040 PCTABS00017 An ultrasonic inspection system and method having an audible signal output is shown which includes an ultrasonic transducer (10) for pulse insonification of an object (12) under control of pulser (14). Echo signals are converted to electrical signals at transducer (10) and the electrical signals are supplied to an A/D converter (30) through amplifiers (18 and 20). Signals from converter (30) are processed to provide for an A-scan or B-scan display at CRT (38). Digital ultrasonic return signals from A/D converter (30) are converted to an audio frequency signal at ultrasound-to-audio converter (50). The audio frequency signal from converter (50) is converted to analog signal form at D/A converter (54) and the analog audio signal is supplied to first and second variable gain amplifiers (58 and 60) the gain of one of which is ramped up while that of the other is simultaneously ramped down. Outputs from the variable gain amplifiers (58 and 60) are supplied to spaced electro-acoustic transducers (66L and 66R) to provide an audible presentation having a stereophonic spatial effect dependent upon distance of travel of the reflected ultrasonic wave pulses. A moving cursor (40) is provided at visual display (38), the movement of cursor which is synchronized with the audible presentation.
Green Philip S.
Gowling Lafleur Henderson Llp
Sri International
LandOfFree
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