SU463010A1 - Device for measuring temperature differences - Google Patents

Device for measuring temperature differences

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Publication number
SU463010A1
SU463010A1 SU1760437A SU1760437A SU463010A1 SU 463010 A1 SU463010 A1 SU 463010A1 SU 1760437 A SU1760437 A SU 1760437A SU 1760437 A SU1760437 A SU 1760437A SU 463010 A1 SU463010 A1 SU 463010A1
Authority
SU
USSR - Soviet Union
Prior art keywords
temperature differences
thermocouple
measuring temperature
temperature
thermocouples
Prior art date
Application number
SU1760437A
Other languages
Russian (ru)
Inventor
Любовь Владимировна Заничковская
Владимир Алексеевич Кочан
Original Assignee
Предприятие П/Я А-7843
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Предприятие П/Я А-7843 filed Critical Предприятие П/Я А-7843
Priority to SU1760437A priority Critical patent/SU463010A1/en
Application granted granted Critical
Publication of SU463010A1 publication Critical patent/SU463010A1/en

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  • Measuring Temperature Or Quantity Of Heat (AREA)

Description

1one

Известно устройство дл  измерени  разности температур, содержащее последовательно соединенные дифференциальную термопару и термозависимую компенсирующую цепочку.A device for measuring the temperature difference is known, comprising a series-connected differential thermocouple and a temperature-dependent compensating chain.

Однако дифференциальна  термопара обладает методической погрешностью из-за нелинейности характеристик термопар. Эта погрешность заключаетс  в том, что при одинаковых разност х температур, но разных температурах , и при одинаковых характеристиках термопар значение выходного сигнала дифференциальной термопары неодинаково.However, a differential thermocouple has a methodological error due to the nonlinearity of the characteristics of thermocouples. This error is that with identical temperature differences, but different temperatures, and with identical thermocouple characteristics, the value of the output signal of the differential thermocouple is not the same.

Цель изобретени  - повышение точности измерений.The purpose of the invention is to improve the measurement accuracy.

Предлагаемое устройство отличаетс  тем, что в термозависимую компенсирующую цепочку в качестве термочувствительного элемента включен термометр сопротивлени , а параллельно ему и дифференциальной термопаре подключен резистор.The proposed device is characterized in that a resistance thermometer is included as a temperature-sensitive element in a temperature-dependent compensating chain, and a resistor is connected in parallel with it to a differential thermocouple.

На чертеже приведена схема устройства.The drawing shows a diagram of the device.

Устройство состоит из дифференциальной термопары 1 и 2, помещаемой в среды разными температурами, термометра сопротивлени  3, включенного последовательно с термопарами , и резистора 4, шунтирующего термопару и термометр сопротивлени .The device consists of a differential thermocouple 1 and 2 placed in the medium at different temperatures, a resistance thermometer 3 connected in series with thermocouples, and a resistor 4 shunt the thermocouple and the resistance thermometer.

С резистооа снимают напр жение, соответствующее разности температур.With resistors, the voltage corresponding to the temperature difference is removed.

При неизменной разности температур, но With a constant temperature difference, but

растущих абсолютных значени х температур, термоэ.д.с. элементов термопары нарастают неодинаково вследствие нелинейности их характеристик . Сопротивление термометра 3, наход щегос  вместе с одной из термопар, при этом также повышаетс , а следовательно растет надение напр жени  на нем, что при соответствующем выборе элементов схемы (термометра сопротивлени  3 и резистора 4) приводит к компенсации той части разности термоэ.д.с. термопар, на которую эта разность увеличилась с ростом крутизны характеристики термопар.increasing absolute values of temperatures, thermo emf. thermocouple elements are growing differently due to the nonlinearity of their characteristics. The resistance of the thermometer 3, which is located together with one of the thermocouples, also increases and therefore increases the voltage on it, which, with an appropriate choice of circuit elements (resistance thermometer 3 and resistor 4), leads to compensation for that part of the thermal em. with. thermocouples, by which this difference increased with increasing steepness of thermocouple characteristics.

Таким образом достигают соответстви  выходного сигнала разности температур в любой части диапазона контролируемых температур .In this way, the output signal is matched to temperature differences in any part of the controlled temperature range.

Предмет изобретени Subject invention

Устройство дл  измерени  разности температур , включающее последовательно соединенные дифференциальную термопару и термозависимую компенсирующую цепочку, о т личающеес  тем, что, с целью повышени  точности измерений, в термозависимую компенсирующую цепочку в качестве термочувствительного элемента включен термометр сопротивлени , а параллельно ему и дифференциальной термопаре подключен резистор..A device for measuring the temperature difference, which includes a series-connected differential thermocouple and a thermo-dependent compensating chain, is characterized by the fact that, in order to improve measurement accuracy, a resistance thermometer is included in the thermo-dependent compensating chain, and a resistor is connected parallel to it and the differential thermocouple. .

-, 1-, one

SU1760437A 1972-03-17 1972-03-17 Device for measuring temperature differences SU463010A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
SU1760437A SU463010A1 (en) 1972-03-17 1972-03-17 Device for measuring temperature differences

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SU1760437A SU463010A1 (en) 1972-03-17 1972-03-17 Device for measuring temperature differences

Publications (1)

Publication Number Publication Date
SU463010A1 true SU463010A1 (en) 1975-03-05

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Family Applications (1)

Application Number Title Priority Date Filing Date
SU1760437A SU463010A1 (en) 1972-03-17 1972-03-17 Device for measuring temperature differences

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SU (1) SU463010A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3462152A1 (en) * 2017-10-02 2019-04-03 Rosemount Aerospace Inc. Accurate and fast response temperature measurement
CN110426139A (en) * 2019-08-09 2019-11-08 杭州磊鑫精密仪器有限公司 A kind of thermometric management system and management method based on mobile terminal

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3462152A1 (en) * 2017-10-02 2019-04-03 Rosemount Aerospace Inc. Accurate and fast response temperature measurement
US10591363B2 (en) * 2017-10-02 2020-03-17 Rosemount Aerospace Inc. Accurate and fast response temperature measurement
CN110426139A (en) * 2019-08-09 2019-11-08 杭州磊鑫精密仪器有限公司 A kind of thermometric management system and management method based on mobile terminal

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