Device and method for measuring a temperature

Abstract

The group of inventions relates to the field of measuring technology and is intended for measuring an internal temperature of an object without penetrating into the inside of the object. A device for measuring a temperature comprises a first thermoelectric heat flux sensor (1) and a second thermoelectric heat flux sensor (2), which are connected to a heat distribution plate (3), and a temperature sensor (4), which is mounted on the heat distribution plate (3), wherein the first and second thermoelectric heat flux sensors (1, 2) are Peltier elements. A method for measuring a temperature comprises: positioning the two thermoelectric heat flux sensors (1, 2), which are coupled by the heat distribution plate (3), on an object (6); measuring the electrical signals produced by heat flows passing through the thermoelectric heat flux sensors (1, 2); measuring a temperature on the surface of the heat distribution plate (3) by means of the temperature sensor (4); and performing a temperature calculation. The group of inventions makes it possible to measure a temperature inside an object using a non-destructive method and provides a high degree of measurement accuracy and precision, increased reliability, ease of measuring internal temperatures of objects, and a simplified means of calculating temperature, as well as presenting new possibilities for measuring temperatures of objects in various industrial sectors.

Claims

Invention formula 1. A device for measuring temperature, including first and second thermoelectric heat flow sensors connected to a heat distribution plate, and a temperature sensor mounted on the heat distribution plate, wherein the first and second thermoelectric heat flow sensors are Peltier elements, wherein the areas of the sensitive sides of the first and second thermoelectric heat flow sensors have a given ratio n, and the first and second heat-conducting heat flow sensors have a different number of thermoelements and different thermal resistances.

2. A device for measuring temperature according to claim 1, in which the first and second heat-conducting heat flow sensors have thermal resistances that differ by at least a factor of two.

3. A device for measuring temperature according to claim 1, in which a metal or ceramic or other plate with high thermal conductivity is used as a heat-conducting plate.

4. A device for measuring temperature according to item 1, containing an additional element designed with the possibility of heating and / or cooling.

5. A device for measuring temperature according to claim 4, in which the additional element, capable of heating and / or cooling, is a Peltier element.

6. A method for measuring temperature using a device according to any of paragraphs 1-5, comprising placing two thermoelectric heat flow sensors connected by a heat distribution plate on an object, measuring electrical signals generated by heat flows passing through the thermoelectric heat flow sensors, measuring the temperature on the surface of the heat distribution plate using a temperature sensor, and calculating the temperature using the formula U1 X U2 Tx = T + (u x R1 - / ?2) x p x U2 x Sal — U1 x Sa2 where Tx is the measured temperature, T is the temperature measured by the temperature sensor, Rl, R2 - thermal resistances of the first and second thermoelectric heat flow sensors, Sal, Sa2 - integral sensitivities of the first and second thermoelectric heat flow sensors, Ul, U2 - electrical signals measured by the first and second thermoelectric heat flow sensors, generated by heat flows passing through them, p is the ratio of the areas of the sensitive sides of the first and second thermoelectric heat flux sensors.

7. A method for measuring temperature according to item 6, in which the values ​​of the measured parameters are controlled using an additional element designed with the possibility of heating and / or cooling the combined sides of the thermoelectric sensors, in which case a Peltier element is used.

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