ULTRASONIC B-SCAN SYSTEM USED TO INSPECT COMPOSITE AIRPLANE PARTS
William Paul Motzer Boeing Commercial Airplane Company, Nondestructive Evaluation Research & Evaluation M/S 73-30, P. O. Box 3707 Seattle WA. 98124 USA
An ultrasonic pulse echo scanning system that log compresses and digitizes the entire ultrasonic waveform is described. The log compression of the signal allows the operator to regenerate any C-Scan in software with different Distance Amplitude Correction (DAC), gain or gate settings. Also, any arbitrary B-Scan can be selected and viewed again with different gain and DAC settings. Any individual A-Scan can be displayed and although recorded as a log compressed signal will be shown as a conventional linear signal. The operator can change the gain of the A-Scan to bring out low amplitude features. Images from laboratory scans of composite parts will be shown. Also 777 production scans using an earlier, non log compressed version of this system will be shown.
Publication Source: Trends in NDE Science & Technology; Proceedings of the 14th World Conference on Non-Destructive Testing, New Delhi, 8-13 December 1996.Vol. 4, pages 2099 - 2104 Publisher:Ashgate Publishing Company
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