TEMPERATURE METER Russian patent published in 2015 - IPC G01K7/02 

FIELD: instrumentation.

SUBSTANCE: invention relates to measurement of temperature. Proposed device comprises two opposed measuring and extra thermocouples. Extra thermocouple is equipped with stabilized voltage source and voltage divider composed of resistor and slide-wire connected in series. Both thermocouples are connected to bridge-type potentiometric circuit with error amplifier its first and second outputs being connected with voltage divider slide-wire and bridge-type potentiometric circuit measuring slide-wire. Besides, this device comprises frequency divider, binary frequency multiplier and reversing pulse counter, controlled frequency oscillator and four digital controlled resistors, all being connected in series. First and second digital controlled resistors are connected in series in second thermocouple voltage divider while thirds and fourth are connected in series with bridge-type potentiometric circuit measuring slide-wire. Code inputs of the first and third digital controlled resistors and second and fourth digital controlled resistors are integrated with forward and inverse outputs of reversing pulse counter with subtracting input connected with the device frequency-pulse output of the device and frequency binary multiplier.

EFFECT: accelerated response, higher reliability.

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