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Title: Diagnostic system for measuring temperature, pressure, CO.sub.2 concentration and H.sub.2O concentration in a fluid stream

A diagnostic system for measuring temperature, pressure, CO.sub.2 concentration and H.sub.2O concentration in a fluid stream is described. The system may include one or more probes that sample the fluid stream spatially, temporally and over ranges of pressure and temperature. Laser light sources are directed down pitch optical cables, through a lens and to a mirror, where the light sources are reflected back, through the lens to catch optical cables. The light travels through the catch optical cables to detectors, which provide electrical signals to a processer. The processer utilizes the signals to calculate CO.sub.2 concentration based on the temperatures derived from H.sub.2O vapor concentration. A probe for sampling CO.sub.2 and H.sub.2O vapor concentrations is also disclosed. Various mechanical features interact together to ensure the pitch and catch optical cables are properly aligned with the lens during assembly and use.
Inventors:
; ; ;
Issue Date:
OSTI Identifier:
1414946
Assignee:
UT-Battelle, LLC (Oak Ridge, TN) ORNL
Patent Number(s):
9,851,296
Application Number:
15/355,762
Contract Number:
AC05-00OR22725
Resource Relation:
Patent File Date: 2016 Nov 18
Research Org:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org:
USDOE
Country of Publication:
United States
Language:
English
Subject:
47 OTHER INSTRUMENTATION; 42 ENGINEERING

Other works cited in this record:

Sensor for measuring the concentration of a gaseous component in a fluid by absorption
patent, January 1989

Apparatus for detecting and analyzing adsorbates
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Laser-induced fluorescence fiber optic probe measurement of oil dilution by fuel
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EGR distribution and fluctuation probe based on CO2 measurements
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EGR distribution and fluctuation probe based on CO2 measurements
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Laser-based sensor for measuring combustion parameters
patent-application, October 2002

Exhaust Gas Analyzer and Exhaust Gas Analyzing Method
patent-application, September 2009

High-speed diode laser measurements of temperature and water vapor concentration in the intake manifold of a diesel engine
journal, January 2014
  • Jatana, Gurneesh S.; Naik, Sameer V.; Shaver, Gregory M.
  • International Journal of Engine Research, Vol. 15, Issue 7, p. 773-788
  • DOI: 10.1177/1468087413517107

Simultaneous high-speed gas property measurements at the exhaust gas recirculation cooler exit and at the turbocharger inlet of a multicylinder diesel engine using diode-laser-absorption spectroscopy
journal, January 2015
  • Jatana, Gurneesh S.; Magee, Mark; Fain, David
  • Applied Optics, Vol. 54, Issue 5, p. 1220-1231
  • DOI: 10.1364/AO.54.001220

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