Thermal measuring and testing – Temperature measurement – In spaced noncontact relationship to specimen
Patent
1986-01-29
1988-08-30
Yasich, Daniel M.
Thermal measuring and testing
Temperature measurement
In spaced noncontact relationship to specimen
250340, 356 44, 356301, 374126, 374131, 374160, G01J 0330, G01J 0560, G01N 2100
Patent
active
047672196
ABSTRACT:
Temperature is measured by launching pulses of light into an elongate optical fibre and determining the temperature at positions along the fibre from the intensity of light scattered at those positions. The input pulses can have either the same or two different wavelengths, and the scattered light can be either Raman or Brillouin scattered and either forward scattered or backscattered. One position along the fibre can be maintained at a known temperature in order to provide a reference for other calculations. In particular embodiments the temperature is derived from the ratio between the intensities at two anti-Stokes wavenumber shifts or between an anti-Stokes scattered and a Rayleigh scattered intensity measurement. Otherwise the intensities of Stokes and anti-Stokes shifted Brillouin back scattered light can be used to derive the temperature.
REFERENCES:
patent: 3622243 (1971-11-01), Wada
patent: 3909132 (1975-09-01), Barrett
patent: 4057349 (1977-11-01), Barrett
patent: 4105337 (1978-08-01), Bjorklund et al.
patent: 4298794 (1981-11-01), Snitzer et al.
patent: 4302970 (1981-12-01), Snitzer et al.
patent: 4316388 (1982-02-01), Miller et al.
patent: 4342907 (1982-08-01), Macedo et al.
patent: 4365896 (1982-12-01), Mihalow
patent: 4405237 (1983-09-01), Manuccia et al.
patent: 4483614 (1984-11-01), Rogers
patent: 4531230 (1985-07-01), Brogardh
patent: 4542987 (1985-09-01), Hirschfeld
patent: 4545253 (1985-10-01), Avicola
patent: 4575259 (1986-03-01), Bacci et al.
patent: 4576485 (1986-03-01), Lambert
patent: 4621929 (1986-11-01), Phillips
"Ultrasonic Testing", J. Szilard, TA 417.4 44 1982 pp. 190-191, 402-407, 374-1177.
Central Electricity Generating Board
Yasich Daniel M.
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