Selective temperature control system

Details Selective temperature control system Selective temperature control system

1981-11-02

1984-12-18

Yasich, Daniel M.

Thermal measuring and testing

Temperature measurement

By electrical or magnetic heat sensor

62180, 364557, G01K 300, G01K 722

Patent

active

044888236

ABSTRACT:
A method and apparatus is disclosed for determining the temperature to which a thermistor is exposed. A capacitor is charged through a reference resistor and the length of time required to charge the capacitor to a predetermined level is measured to obtain a reference charge time. The capacitor is discharged, and then charged through the thermistor and the length of time required to charge the capacitor to the predetermined level through the thermistor is measured to obtain a temperature charge time. The temperature to which the thermistor is exposed is determined by computing the difference between the reference charge time and the temperature charge time divided by the sum of the times.

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Publ. "Digital Thermometer", by M. Plant, Practical Electronics, Aug. 1978, pp. 896-900.

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