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Method of absorbance correction in a spectroscopic heating value sensor

United States Patent

8,538,717
September 17, 2013
View the Complete Patent at the US Patent & Trademark Office
A method and apparatus for absorbance correction in a spectroscopic heating value sensor in which a reference light intensity measurement is made on a non-absorbing reference fluid, a light intensity measurement is made on a sample fluid, and a measured light absorbance of the sample fluid is determined. A corrective light intensity measurement at a non-absorbing wavelength of the sample fluid is made on the sample fluid from which an absorbance correction factor is determined. The absorbance correction factor is then applied to the measured light absorbance of the sample fluid to arrive at a true or accurate absorbance for the sample fluid.
Saveliev; Alexei (Cary, NC), Jangale; Vilas Vyankatrao (Raleigh, NC), Zelepouga; Sergeui (Hoffman Estates, IL), Pratapas; John (Naperville, IL)
Gas Technology Institute (Des Plaines, IL), North Carolina State University (Raleigh, NC)
13/ 015,624
20120197575
January 28, 2011
The U.S. Government has a paid-up license in this invention and the right in limited circumstances to require the patent owner to license others on reasonable terms as provided for by the terms of Contract No. DE-EE0000556 awarded by the U.S. Department of Energy.