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. 30, 2015
Filed:
Oct. 11, 2013
Ut-battelle Llc, Oak Ridge, TN (US);
James E. Parks, II, Knoxville, TN (US);
William P. Partridge, Jr., Oak Ridge, TN (US);
Ji Hyung Yoo, Williamsville, NY (US);
UT-Battelle, LLC, Oak Ridge, TN (US);
Abstract
A diagnostic system having a laser, an EGR probe, a detector and a processor. The laser may be a swept-λ laser having a sweep range including a significant COfeature and substantially zero absorption regions. The sweep range may extend from about 2.708 μm to about 2.7085 μm. The processor may determine COconcentration as a function of the detector output signal. The processor may normalize the output signal as a function of the zero absorption regions. The system may include a plurality of EGR probes receiving light from a single laser. The system may include a separate detector for each probe. Alternatively, the system may combine the light returning from the different probes into a composite beam that is measured by a single detector. A unique modulation characteristic may be introduced into each light beam before combination so that the processor can discriminate between them in the composite beam.