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 Lab. (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}
}