Ice detector circuit

Details Ice detector circuit Ice detector circuit

G - Physics

08

B

340/139

G08B 19/02 (2006.01) B64D 15/00 (2006.01) G01D 5/34 (2006.01)

Patent

CA 1293549

ABSTRACT OF THE DISCLOSURE An ice detector circuit for sensing an ice deposition on a sensing surface of an ice detector probe from an air mass flowing relative to the probe. The probe includes a heater to heat the sensing surface and a temperature sensor for sensing the sensing surface temperature during heating. The temperature sensor provides the circuit with an output having a level varying as a function of the sensing surface temperature. The circuit includes a controller which selectively energizes the heater, a timer which provides a timing output representative of a time interval elapsed between selected temperature sensor output levels, and computing means, such as a microprocessor, which computes an output representative of ice deposition as a function of a predetermined relationship between ice deposition and the timing output.

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