DOE Patents title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: EGR distribution and fluctuation probe based on CO2 measurements

Abstract

A diagnostic system having a laser, an EGR probe, a detector and a processor. The laser may be a swept-.lamda. laser having a sweep range including a significant CO.sub.2 feature and substantially zero absorption regions. The sweep range may extend from about 2.708 .mu.m to about 2.7085 .mu.m. The processor may determine CO.sub.2 concentration 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.

Inventors:
; ;
Issue Date:
Research Org.:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1187942
Patent Number(s):
9068933
Application Number:
14/051,788
Assignee:
UT-Battelle, LLC (Oak Ridge, TN)
Patent Classifications (CPCs):
G - PHYSICS G01 - MEASURING G01N - INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
DOE Contract Number:  
AC05-00OR22725
Resource Type:
Patent
Resource Relation:
Patent File Date: 2013 Oct 11
Country of Publication:
United States
Language:
English
Subject:
33 ADVANCED PROPULSION SYSTEMS; 36 MATERIALS SCIENCE

Citation Formats

Parks, II, James E., Partridge, Jr., William P., and Yoo, Ji Hyung. EGR distribution and fluctuation probe based on CO2 measurements. United States: N. p., 2015. Web.
Parks, II, James E., Partridge, Jr., William P., & Yoo, Ji Hyung. EGR distribution and fluctuation probe based on CO2 measurements. United States.
Parks, II, James E., Partridge, Jr., William P., and Yoo, Ji Hyung. Tue . "EGR distribution and fluctuation probe based on CO2 measurements". United States. https://www.osti.gov/servlets/purl/1187942.
@article{osti_1187942,
title = {EGR distribution and fluctuation probe based on CO2 measurements},
author = {Parks, II, James E. and Partridge, Jr., William P. and Yoo, Ji Hyung},
abstractNote = {A diagnostic system having a laser, an EGR probe, a detector and a processor. The laser may be a swept-.lamda. laser having a sweep range including a significant CO.sub.2 feature and substantially zero absorption regions. The sweep range may extend from about 2.708 .mu.m to about 2.7085 .mu.m. The processor may determine CO.sub.2 concentration 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.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2015},
month = {6}
}

Works referenced in this record:

Multiple angle and redundant visibility sensor
patent, December 1994


Opacity and forward scattering monitor using beam-steered solid-state light source
patent, May 1998


Method for monitoring particulates using beam-steered solid-state light source
patent, November 1998


Optical path structure for open path emissions sensing with spinning mirror
patent, June 2004


Optical path structure for open path emissions sensing
patent, June 2004


Optical path structure for open path emissions sensing with opposed sources
patent, December 2004


Fiber optic smoke detector
patent, November 2007


Laser-induced fluorescence fiber optic probe measurement of oil dilution by fuel
patent, November 2010


Advanced Laser Imaging Diagnostics in Combustion
journal, May 2005