Aircraft ice detecting system

Details Aircraft ice detecting system Aircraft ice detecting system

1995-05-22

1999-07-13

Barefoot, Galen L.

Aeronautics and astronautics

Aircraft structure

Ice prevention

340583, 340962, B64D 1520

Patent

active

059215011

ABSTRACT:
In a method of detecting ice on surfaces of an aircraft, a surface of an aircraft is scanned with laser light operating at different wavelength regions in a manner whereby the surface scatters the laser light. Laser light scattered from the surface is detected. Radiation outside the wavelength bands of interest is removed prior to detection. The detected, filtered, scattered laser light is processed to reconstruct images of the surface, thereby indicating areas of ice and water on the surface. The processing takes into account the directions of scanned continuous wattage laser beams relative to the surface, laser beam geometry factors due to changing distance between the laser beams and the surface while scanning, relative signal levels, normalizations and returns from other detectors. The material of the windows of the aircraft blocks the laser beam and any stray laser light. Also, the windows of the aircraft could be treated to block the laser beam and the laser light. Areas of ice and water on the surface indicated by the processing are visually displayed.

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patent: 5296853 (1994-03-01), Federow et al.
patent: 5400144 (1995-03-01), Gagnon

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