Self-cleaning optical sensor
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United States of America Patent
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May 20, 2008
Grant Date -
Mar 29, 2007
app pub date -
Mar 11, 2004
filing date -
Mar 13, 2003
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The invention relates to an optical sensor for detecting light emission in combustion processes in a combustion chamber. At least one lens of the sensor faces the combustion chamber and is disposed on the tip of the sensor. The inventive sensor is provided with a heating device, which is disposed on the tip thereof, in the region of the front lens. The heating device can be a wire coil, a laser or a conduit with heated fluid. The sensor can include a controller for controlling the temperature of the heating device so that the tip of the sensor can be heated by the heating device to a specific temperature at which any soot on the front lens is combusted. As a result, the sensor remains clean and operational during the entire measuring period as desired.
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