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An ice detector circuit (60) controls heating of an ice detecting probe (62). The circuit (60) generates an icing output as a function of a temperature output generated by the probe (62). A control circuit (114) cyclically controls a start time of the heating. A time measurement circuit (106) measur...

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Bibliographische Detailangaben
1. Verfasser:	FREEMAN, KENNETH, J., EAGAN, MN 55123, US
Format:	Patent
Sprache:	ger
Schlagworte:	AIRCRAFT ALARM SYSTEMS ARRANGEMENTS OR MOUNTING OF POWER PLANTS OR PROPULSIONTRANSMISSIONS IN AIRCRAFT AVIATION COSMONAUTICS ELECTRIC HEATING ELECTRIC LIGHTING NOT OTHERWISE PROVIDED FOR ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR ELECTRICITY EQUIPMENT FOR FITTING IN OR TO AIRCRAFT FLYING SUITS INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES MEASURING ORDER TELEGRAPHS PARACHUTES PERFORMING OPERATIONS PHYSICS SIGNALLING SIGNALLING OR CALLING SYSTEMS TESTING TRANSPORTING
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Beschreibung
Zusammenfassung:	An ice detector circuit (60) controls heating of an ice detecting probe (62). The circuit (60) generates an icing output as a function of a temperature output generated by the probe (62). A control circuit (114) cyclically controls a start time of the heating. A time measurement circuit (106) 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 (124) compares the melting time to a stored comparison parameter (122) adjusted by the warm-up time and provides the icing output.