Thermal measuring and testing – Temperature measurement – In spaced noncontact relationship to specimen
Patent
1987-11-18
1989-05-16
Yasich, Daniel M.
Thermal measuring and testing
Temperature measurement
In spaced noncontact relationship to specimen
356 43, 356349, G01B 902, G01K 1100, G01N 2147
Patent
active
048305138
ABSTRACT:
The distributed temperature sensor employs an optical fiber as sensing element located in an ambient or near a body of which the temperature is to be monitored or measured. A source of light pulses sends into the fiber, pulses of predetermined duration. The backscattered radiation is collected for each pulse and the frequency spectrum variations in the backscattered radiation with respect to the incident radiation are analyzed. A computer obtains the temperature from said variations. The source and the spectrum variation analyzer are part of an optical time domain reflectometer which allows the temperature information to be associated with the information on the position of the backscattering point along the fiber.
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patent: 4151747 (1979-05-01), Gottlieb et al.
patent: 4365896 (1982-12-01), Mihalow
patent: 4542987 (1985-09-01), Hirschfield
patent: 4576485 (1986-03-01), Lambert
patent: 4610552 (1986-09-01), Kobayashi et al.
patent: 4652131 (1987-03-01), Fercher et al.
patent: 4710026 (1987-12-01), Magome et al.
CSELT - Centro Studi e Laboratori Telecomunicazioni S.P.A.
Dubno Herbert
Yasich Daniel M.
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