Is a
Patent attributes
Current Assignee
Patent Jurisdiction
Patent Number
Patent Inventor Names
Keiichi Kajino0
Tatsuyuki Nihei0
Mitsuharu Iwasaki0
Date of Patent
March 13, 2012
Patent Application Number
12791426
Date Filed
June 1, 2010
Patent Citations Received
Patent Primary Examiner
Patent abstract
A particulate detector system is provided that can sense particulates (such as smoke in the air). The system employs a reflected light system that generally avoids making measurements of light intensity. Instead, coded signals are compared with one another to determine error rates between emitted light and detected light (across a chamber). Based on the error rate, processing circuitry can determine particulate concentration.
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