Ice detector circuit

Details Ice detector circuit Ice detector circuit

1987-06-10

1990-12-25

Orsino, Joseph A.

Communications: electrical

Condition responsive indicating system

Specific condition

340962, 244134F, G08B 1902

Patent

active

049806734

ABSTRACT:
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.

REFERENCES:
patent: 3594775 (1971-07-01), Fox
patent: 4036457 (1977-07-01), Volkner et al.
patent: 4327286 (1982-04-01), Thoma

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