Temperature measuring device

Details Temperature measuring device Temperature measuring device

1985-10-15

1987-06-02

LaRoche, Eugene R.

Optics: measuring and testing

Optical pyrometers

356435, 374131, G01J 508

Patent

active

046698728

ABSTRACT:
An optical type temperature measuring device which provides an accurate output in spite of temperature variations of the sensor or degradation of the characteristics of the sensor over time. The device includes a light source, a spectroscope, and a temperature sensor made of a material having one end coupled through a first optical guide to the light source and the other end coupled through another optical guide to the spectroscope. The output of the spectroscope is converted to an electrical signal, which is subsequently detected with plural different comparison levels to obtain higher end values of the absorption wavelength ranges of the sensor at the respective reference levels. These higher end values are then processed to obtain a rising point of a temperature dependent light absorption characteristic curve of the temperature sensor.

REFERENCES:
patent: 4462699 (1984-07-01), Shaw et al.

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