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Title: Phosphor thermometry system

Patent ·
OSTI ID:873258
 [1];  [2];  [1];  [3];  [4];  [1]
  1. Knoxville, TN
  2. Oliver Springs, TN
  3. Vienna, AT
  4. Oak Ridge, TN
+ Show Author Affiliations

An apparatus for measuring the temperature of a moving substrate includes an air gun with a powder inlet port in communication with the outlet port of a powder reservoir, an air inlet port in communication with a pressurized air source, and an outlet nozzle spaced from and directed toward the moving substrate. The air gun is activated by the air pulses to spray controlled amounts of the powdered phosphor onto the moving substrate, where the phosphor assumes the temperature of the moving substrate. A laser produces light pulses, and optics direct the light pulses onto the phosphor on the moving substrate, in response to which the phosphor emits a luminescence with a decay rate indicative of the temperature of the phosphor. A collection lens is disposed to focus the luminescence, and a photodetector detects the luminescence focused by the collection lens and produces an electrical signal that is characteristic of the brightness of the luminescence. A processor analyzes the electrical signal to determine the decay characteristic of the luminescence and to determine the temperature of the phosphor from the decay characteristic.

Research Organization:
American Iron and Steel Institute, Washington, DC (United States)
DOE Contract Number:
FC07-93ID13205
Assignee:
American Iron and Steel Institute (Washington, DC)
Patent Number(s):
US 6123455
OSTI ID:
873258
Country of Publication:
United States
Language:
English

References (5)

Remote optical measurement of temperature using luminescent materials journal January 1981
Fiber-Optic Temperature Sensor Using Fluorescence Decay Time conference November 1984
Laser-Induced Fluorescence in Doped Metal Oxide Planar Waveguides Deposited from Aqueous Solutions journal January 1991
Monitoring permanent-magnet motor heating with phosphor thermometry journal January 1988
Laser-induced luminescence of Gd/sub 2/O/sub 2/S:Tb/sup 3+/ and La/sub 2/O/sub 2/S:Tb?sup 3+/ thermoposphors for remote high temperature measurements
  • Bugos, A. R.; Platt, K. J.; Cates, M. R.
  • LEOS '90. IEEE Lasers and Electro-Optics Society 1990 Annual Meeting, LEOS '90. Conference Proceedings IEEE Lasers and Electro-Optics Society 1990 Annual Meeting https://doi.org/10.1109/LEOS.1990.690552
conference January 1990

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Related Subjects

phosphor
thermometry
apparatus
measuring
temperature
moving
substrate
air
gun
powder
inlet
communication
outlet
reservoir
pressurized
source
nozzle
spaced
directed
activated
pulses
spray
controlled
amounts
powdered
assumes
laser
produces
light
optics
direct
response
emits
luminescence
decay
rate
indicative
collection
lens
disposed
focus
photodetector
detects
focused
electrical
signal
characteristic
brightness
processor
analyzes
determine
moving substrate
air source
controlled amounts
pressurized air
light pulses
electrical signal
air inlet
light pulse
detector detects
outlet nozzle
controlled amount
processor analyzes
phosphor emits
decay rate
photodetector detects
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