Method and apparatus for determining ice boundary temperature fo

Details Method and apparatus for determining ice boundary temperature fo Method and apparatus for determining ice boundary temperature fo

1985-03-08

1987-01-27

Basinger, Sherman D.

Aeronautics and astronautics

Aircraft structure

Ice prevention

244134F, 219497, B64D 1512

Patent

active

046389601

ABSTRACT:
A method of determining the temperature, preferably the ice boundary temperature, of an electrical resistive heating element of a de-icing system for airplanes, helicopters, and the like, preferably for a fully automatic control of the heating times of the heating elements. Additional temperature sensors are avoided and circuitry costs are substantially reduced by using the resistive heating elements themselves for determining the temperature. The resistance variation due to temperature variations of an element is ascertained by a current-voltage measurement, and a temperature variation of the element is determined from the resistance variation while using the temperature coefficient. The current-voltage measurement may be based on Ohm's law with a following analog or digital processing of the signal.

REFERENCES:
patent: 2767294 (1956-10-01), Fraser et al.
patent: 3277459 (1966-10-01), Werner
patent: 4514619 (1985-04-01), Kugelman

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