Electro-optic ice detection

Details Electro-optic ice detection Electro-optic ice detection

1994-10-31

1996-03-19

Fields, Carolyn E.

Radiant energy

Invisible radiant energy responsive electric signalling

Infrared responsive

25033912, 2503418, 244134F, 340583, G01N 2135

Patent

active

055005306

ABSTRACT:
To determine whether ice is present on an aircraft wing, the intensity of light in a band between 1.16 and 1.20 microns is determined as is the intensity in a band between 1.24 and 1.28 microns. The contrast, defined as the difference between the intensities over the sum of these intensities, is determined. Because of the peculiar characteristics of the reflectivity of ice, water, Type I de-icing fluid, and Type II anti-icing fluid, if the contrast is positive, it is an indication of ice on the wing whereas if it is negative it is an indication there is no ice present.

REFERENCES:
patent: 4808824 (1989-02-01), Sinnar
patent: 5180122 (1993-01-01), Christian et al.
patent: 5218206 (1993-06-01), Schmitt et al.

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