Autocalibrating non-contact temperature measuring technique empl

Details Autocalibrating non-contact temperature measuring technique empl Autocalibrating non-contact temperature measuring technique empl

1994-04-06

1995-11-07

Gutierrez, Diego F. F.

Thermal measuring and testing

Temperature measurement

In spaced noncontact relationship to specimen

374121, 73160, 364557, G01J 508, G01K 1306

Patent

active

054642841

ABSTRACT:
A non-contact temperature measuring system and a dual-reference body structure employed therein is described, wherein a moving object whose temperature is to be determined, is passed by first and second reference bodies having a same form factor with respect to the moving object. Each of the reference bodies has a heat flow sensor embedded at the end of a cavity formed in the reference body such that the heat flow sensor primarily responds to radiation heat flow generated by a temperature differential between the moving object and its respective reference body. With the reference bodies thermally isolated and maintained at different temperatures by heaters embedded in the reference bodies, and their respective heat flow sensors properly calibrated, the temperature of the moving object is calculated, by applying the Stefan-Boltzmann law, from the respective temperatures of the first and second reference bodies, and the respective calibrated output voltages of the respective heat flow sensors of the first and second reference bodies.

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