Temperature measurement method using temperature coefficient tim

Details Temperature measurement method using temperature coefficient tim Temperature measurement method using temperature coefficient tim

1996-11-06

1999-01-19

Gutierrez, Diego F. F.

Thermal measuring and testing

Temperature measurement

By electrical or magnetic heat sensor

374184, 374170, 307651, 327512, G01K 718, G01K 722, G01K 734

Patent

active

058621709

ABSTRACT:
A method and apparatus for temperature measurement especially suited for low cost, low power, moderate accuracy implementation. It uses a sensor whose resistance varies in a known manner, either linearly or nonlinearly, with temperature, and produces a digital output which is proportional to the temperature of the sensor. The method is based on performing a zero-crossing time measurement of a step input signal that is double differentiated using two differentiators functioning as respective first and second time constants; one temperature stable, and the other varying with the sensor temperature.

REFERENCES:
patent: 3914539 (1975-10-01), Hashimoto
patent: 4078201 (1978-03-01), Buser
patent: 4676663 (1987-06-01), Tehon
patent: 5056048 (1991-10-01), Seperant
patent: 5118200 (1992-06-01), Kirillov et al.

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