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Title: Diagnostic system for measuring temperature, pressure, CO2 concentration and H2O 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.
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Issue Date:
OSTI Identifier:
UT-Battelle, LLC (Oak Ridge, TN) ORNL
Patent Number(s):
Application Number:
Contract Number:
Resource Relation:
Patent File Date: 2015 Aug 21
Research Org:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org:
Country of Publication:
United States

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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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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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