The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 28, 2016
Filed:
Dec. 09, 2009
Yu Wang, North Wales, PA (US);
William Howard Eberhardt, Cherry Hill, NJ (US);
Mark Wayne Holt, Emmaus, PA (US);
Jamison W. Janawitz, Overland Park, KS (US);
Yu Wang, North Wales, PA (US);
William Howard Eberhardt, Cherry Hill, NJ (US);
Mark Wayne Holt, Emmaus, PA (US);
Jamison W. Janawitz, Overland Park, KS (US);
The Babcock & Wilcox Company, Barberton, OH (US);
Abstract
A method is provided of calibrating a system that detects presence of a pollution component within exhaust gases proceeding along an exhaust passageway. A measurement cell of a probe is isolated by movement of either the entire probe or a shield within the probe from the exhaust gas to allow reference gas to be detected by a laser beam in the mid-infrared range in the measurement cell to calibrate the system. In another example, a laser source is placed on one side of an exhaust passageway and a detector is placed on the other side. A reference cell is provided that is used to receive reference gas and calibrate the system. In yet another example, the exhaust gas is extracted from the passageway and is measured in a reference cell. The reference cell is also filled with reference gas when it is desired to calibrate the system.