Adaptive ice detector circuit

Details Adaptive ice detector circuit Adaptive ice detector circuit

1990-09-28

1992-08-18

Paschall, Mark H.

Electric heating

Heating devices

With power supply and voltage or current regulation or...

219492, 219494, 219506, 340581, H05B 102

Patent

active

051401355

ABSTRACT:
An ice detector circuit controls heating of a probe detecting ice. The circuit generates an icing output as a function of a temperature output generated by the probe. A control circuit cyclically controls a start time of the heating. A time measurement circuit measures a warm-up time to a first temperature threshold below the melting temperature, and measuring a melting time to a second temperature above the melting temperature. A comparator compares the melting time to a stored comparison parameter adjusted by the warm-up time and provides the icing output.

REFERENCES:
patent: 3594775 (1971-07-01), Fox
patent: 4333004 (1982-06-01), Forgue et al.
patent: 4367399 (1983-01-01), Anthony et al.
patent: 4640127 (1987-02-01), Schneider
patent: 4755062 (1988-07-01), Meyer
patent: 4897527 (1990-01-01), Cripps et al.

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