Apparatus and method for transient thermal infrared spectrometry of flowable enclosed materials
- Ames, IA
A method and apparatus for enabling analysis of a flowable material enclosed in a transport system having an infrared transparent wall portion. A temperature differential is transiently generated between a thin surface layer portion of the material and a lower or deeper portion of the material sufficient to alter the thermal infrared emission spectrum of the material from the black-body thermal infrared emission spectrum of the material, and the altered thermal infrared emission spectrum is detected through the infrared transparent portion of the transport system while the altered thermal infrared emission spectrum is sufficiently free of self-absorption by the material of emitted infrared radiation. The detection is effected prior to the temperature differential propagating into the lower or deeper portion of the material to an extent such that the altered thermal infrared emission spectrum is no longer sufficiently free of self-absorption by the material of emitted infrared radiation. By such detection, the detected altered thermal infrared emission spectrum is indicative of characteristics relating to molecular composition of the material.
- Research Organization:
- Ames Laboratory (AMES), Ames, IA; Iowa State Univ., Ames, IA (United States)
- DOE Contract Number:
- W-7405-ENG-82
- Assignee:
- Iowa State University Research Foundation, Inc. (Ames, IA) [*] Notice: portion of term of this patent subsequent to December 2, 2008 has been disclaimed.
- Patent Number(s):
- US 5191215
- Application Number:
- 07/749,186
- OSTI ID:
- 868687
- Country of Publication:
- United States
- Language:
- English
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method
transient
thermal
infrared
spectrometry
flowable
enclosed
materials
enabling
analysis
material
transport
transparent
wall
portion
temperature
differential
transiently
generated
surface
layer
deeper
sufficient
alter
emission
spectrum
black-body
altered
detected
sufficiently
free
self-absorption
emitted
radiation
detection
effected
prior
propagating
extent
indicative
characteristics
relating
molecular
composition
transient thermal
layer portion
sufficiently free
thermal infrared
wall portion
transparent wall
emission spectrum
infrared emission
infrared radiation
surface layer
temperature differential
molecular composition
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emitted infrared
material sufficient
enabling analysis
material enclosed
infrared spectrometry
infrared transparent
enclosed materials
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