Flame detection

The presence or absence of a flame in an engine combustion chamber 4 is detected by monitoring the level of radiation at two different wavelengths. One wavelength is between 470nm and 530nm whereas the other wavelength is about 670nm. The ratio of the level of radiation at one wavelength to that at...

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Bibliographische Detailangaben
1. Verfasser:	PETER DONALD BAKER
Format:	Patent
Sprache:	eng
Schlagworte:	AIR INTAKES FOR JET-PROPULSION PLANTS ALARM SYSTEMS BLASTING COLORIMETRY COMBUSTION APPARATUS COMBUSTION ENGINES COMBUSTION PROCESSES CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS GAS-TURBINE PLANTS HEATING HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS LIGHTING MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT,POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRA-RED,VISIBLE OR ULTRA-VIOLET LIGHT MEASURING MECHANICAL ENGINEERING ORDER TELEGRAPHS PHYSICS RADIATION PYROMETRY REGULATING OR CONTROLLING COMBUSTION SIGNALLING SIGNALLING OR CALLING SYSTEMS TESTING WEAPONS
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Beschreibung
Zusammenfassung:	The presence or absence of a flame in an engine combustion chamber 4 is detected by monitoring the level of radiation at two different wavelengths. One wavelength is between 470nm and 530nm whereas the other wavelength is about 670nm. The ratio of the level of radiation at one wavelength to that at the longer wavelength is measured. When the ratio is between about 0.1 and 1.0, this indicates the presence of a flame. When the ratio is outside this range this indicates absence of a flame and causes a signal to be supplied to an igniter control unit 13.