Exhaust gas particle sensor
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United States of America Patent
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-
Jan 7, 1997
Issued Date -
N/A
app pub date -
Dec 14, 1995
filing date -
Oct 22, 1991
priority date (Note) -
Expired
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Abstract
In a exhaust smoke sensor a light emitter generates a light beam which passes through a region containing the exhaust gas to a first light sensor. To reduce interference the light emitter is driven by a near square wave signal produced by passing a square wave through a low pass filter.
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