Apparatus and method for nondestructive inspection of a vehicle

Details Apparatus and method for nondestructive inspection of a vehicle Apparatus and method for nondestructive inspection of a vehicle

1992-03-27

1993-10-26

Turner, Samuel A.

Optics: measuring and testing

By dispersed light spectroscopy

Utilizing a spectrometer

356 355, 356 32, 356345, 73800, 73802, 73815, 244125, G01B 902

Patent

active

052570886

ABSTRACT:
This invention tests a vehicle, such as an aircraft, using nondestructive interferometry. An interferometer detects movements in the vehicle surface due to stress. One applies such stress by pressurizing the vehicle. In one embodiment, a hood housing the interferometer attaches to the vehicle surface with the aid of a vacuum. One can vary the pressure in the vehicle in various ways, while monitoring the interferometer for signs of defects in the structure behind the surface. The invention also includes an arrangement for substantially automating the analysis. For example, one can automatically position the interferometer according to position information received from appropriate sensors, in combination with stored information about the structure of the vehicle. One preferably uses a real-time interferometer, such as an electronic shearography camera, in the present invention. One can quickly determine the location of defects by observing fringes on a video monitor.

REFERENCES:
patent: 4682892 (1987-07-01), Chawla
patent: 4887899 (1989-12-01), Hung
patent: 5065331 (1991-11-01), VaChon et al.
patent: 5082366 (1992-01-01), Tyson, II et al.
patent: 5094528 (1992-03-01), Tyson et al.

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