Radiation thermometer and method of computing the temperature

Details Radiation thermometer and method of computing the temperature Radiation thermometer and method of computing the temperature

1998-12-16

2000-11-21

Bennett, G. Bradley

Thermal measuring and testing

Temperature measurement

In spaced noncontact relationship to specimen

374121, 374179, 374124, G01K 1300

Patent

active

061492981

ABSTRACT:
The invention is directed to a method of computing the radiation temperature of a body from the signals of a radiation and an ambient temperature sensor, and further to a radiation thermometer, in particular a clinical radiation thermometer. In the method of the present invention, computation of the temperature is not using the Stefan Boltzmann law, but rather, a polynomial is used, preferably a third-degree polynomial, which is adjusted to the radiation-optical properties of the thermometer in the relevant wavelength range. The reciprocal value of the sensitivity of the radiation sensor is preferably represented as a polynomial as well. In this manner, the computation of a fourth root or divisions which are otherwise customary are avoided, enabling the necessary computations to be also performed, for example, by a 4-bit microprocessor with great speed.

REFERENCES:
patent: 4784149 (1988-11-01), Berman et al.
patent: 4797840 (1989-01-01), Fraden
patent: 4881823 (1989-11-01), Tanaka
Disclosed Anonymously, Correction for Media Absorption of Transmitted Light Intensity in Optical Pyrometry, Research Disclosure, Nov. 1991, No. 331, Emsworth, Great Britian.
Von J. Verch, Auswertung optisch-pyrometrischer Temperaturmessungen/Optik 19, Heft 12, 1962/pp. 640-665.

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