Simplified impedance plane bondtesting inspection

Details Simplified impedance plane bondtesting inspection Simplified impedance plane bondtesting inspection

2006-12-28

2009-08-18

Williams, Hezron (Department: 2856)

Measuring and testing

Vibration

Resonance, frequency, or amplitude study

Reexamination Certificate

active

07574915

ABSTRACT:
An NDI system includes an ultrasonic transducer and an electronic device having an indicator, such as a light source. The electronic device energizes the transducer, receives sinusoidal signals from the transducer, determines impedance-plane coordinates corresponding to quadrature-phase separated components of the sinusoidal signals, and automatically activates the indicator if impedance-plane coordinates exceed a preset threshold. The system may be used in methods of inspecting layered structures such as composite aircraft components and repair patches applied to such structures.

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International Search Report for PCT/US2007/023456 dated Jun. 11, 2008.

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