Thermal measuring and testing – Temperature measurement – In spaced noncontact relationship to specimen
Patent
1985-03-27
1987-06-16
Yasich, Daniel M.
Thermal measuring and testing
Temperature measurement
In spaced noncontact relationship to specimen
2504581, 356 731, 374161, G01J 502, G01N 2184
Patent
active
046732993
ABSTRACT:
A temperature measuring arrangement including a relatively long optical fibre temperature sensor doped along its length with material that absorbs light in dependence upon temperature, launcher for launching into one end of the temperature sensor fibre contemporaneous light pulses of two different wavelengths and comparator for comparing variations with time in back-scattered light of the two different wavelengths returned along the sensor fibre in order to provide an indication of the temperature distribution along the fibre, the two wavelengths of the light pulses launched into the fibre sensor being chosen so that they correspond with different absorption bands of the doped material.
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Plessey Overseas Limited
Yasich Daniel M.
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