Shearography has been shown to be a powerful tool for on- site non-destructive evaluation applications, especially in aircraft component inspections. However, current commercially available portable shearography systems are qualitative, low signal to noise ratio, and low flaw detection sensitivity. In this paper, we will introduce a real-time, high-resolution, portable, phase-stepping shearography system developed at the Applied Research Lab of The Pennsylvania State University. The system can fit into a wheeled cart and run at a speed of 1-2 inspections/sec for a 7 inch X 5 inch field of view. It provides full quantitative analysis ability and substantially improves flaw detection sensitivity. The applicability and portability of the system to on-site field NDE applications have been tested by a successful field demonstration conducted at a naval air station.
Real-time portable phase-stepping shearography system for NDE
Nondestructive Evaluation of Aging Aircraft, Airports, and Aerospace Hardware II ; 1998 ; San Antonio,TX,USA
Proc. SPIE ; 3397
1998-03-31
Conference paper
Electronic Resource
English
Real-time portable phase-stepping shearography system for NDE [3397-25]
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