Measuring and testing – Vibration – By mechanical waves
Patent
1995-04-12
1997-12-16
Williams, Hezron E.
Measuring and testing
Vibration
By mechanical waves
73588, 73583, 73635, 73633, 73640, G01N 2900
Patent
active
056987870
ABSTRACT:
A method and apparatus for non-destructive inspection of complex structures employs a portable laser based ultrasonic transducer 600 output to rapidly detect and size flaws in such structures, including the radii of composites, laminates, and complex skin/substructure assemblies, such as airplane wings. A fiber optic delivery system 610A is employed with the laser based ultrasonic transducer 600 and a thermoelastic medium to rapidly and accurately access the radii of complex structures in the field without the need for liquid or gel couplants, with the thermoelastic expansion of the test piece 680 producing mechanical stresses that initiate detectable sound waves regardless of the angle of the laser based ultrasonic transducer 600 output with respect to the test piece 680. A MAUS III scanning device may be employed to detect these sound waves and provide accurate information as to the detected flaws.
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MAUS III.RTM. Mobile AUtomated Scanner III Technical Description; Jul. 15, 1993.
Kintz Kevin G.
Parzuchowski Halina M.
Reighard Mark K.
McDonnell Douglas Corporation
Moller Richard A.
Williams Hezron E.
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