Thermal measuring and testing – Temperature measurement – In spaced noncontact relationship to specimen
Patent
1990-05-21
1991-07-02
Cuchlinski, Jr., William A.
Thermal measuring and testing
Temperature measurement
In spaced noncontact relationship to specimen
374129, 374130, G01N 2165, G01J 510
Patent
active
050281461
ABSTRACT:
An optical fiber is installed to pass through a plurality of measurement places. Predetermined positions in the optical fiber are set at a predetermined temperature. When an optical signal is radiated on the optical fiber, Raman scattering occurs at various portions of the optical fiber. The intensities of the Raman scattered light components depend on temperatures. Backscattered light components of the Raman scattered light are sampled and stored in a memory. A temperature distribution on the optical fiber is obtained on the basis of the stored data. The temperatures of the mesurement places can be specified on the basis of the predetermined temperature on the obtained temperature distribution as a reference. The temperatures of the measurement places can be corrected on the basis of the predetermined temperature.
REFERENCES:
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patent: 3986775 (1976-10-01), Chang et al.
patent: 4008961 (1977-02-01), Barrett et al.
patent: 4673299 (1987-06-01), Dakin
patent: 4767219 (1988-08-01), Bibby
patent: 4823166 (1989-04-01), Hartog et al.
Bennett G. Bradley
Cuchlinski Jr. William A.
Kabushiki Kaisha Toshiba
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