Thermocouple cold junction compensation and temperature measurement circuit and device
A technology of cold junction compensation and temperature measurement circuit, which is applied in the direction of measuring devices, electric devices, and thermometers using electric/magnetic elements that are directly sensitive to heat, and can solve the problem of low measurement accuracy, cold junction temperature, error, and uncertainty Thermocouple temperature measurement and other issues to achieve the effect of improving accuracy and reliability and realizing accurate measurement
Active Publication Date: 2016-06-08
CHINA HANGFA SOUTH IND CO LTD
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[0004] The invention provides a thermocouple cold junction compensation temperature measurement circuit and device to solve the low measurement accuracy caused by the influence of the environment on the thermocouple cold junction temperature and the uncertainty of the cold junction temperature. technical problems
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[0032] It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and examples.
[0033] refer to figure 1 , a preferred embodiment of the present invention provides a thermocouple cold junction compensation temperature measurement circuit, including a temperature sensor 10 for collecting ambient temperature; electronic controller 20, electronic controller 20 includes a cold junction temperature compensator 21 and a cold A pair of terminal posts that are connected to the temperature compensator at the end, the temperature compensator 21 at the cold end is connected with the temperature sensor 10, and is used for temperature compensation to the cold end of the thermocouple according to the ambient temperature collected by the temperature sensor 10; the temperature compensator...
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The invention discloses a thermocouple cold junction compensation and temperature measurement circuit and device. The thermocouple cold junction compensation and temperature measurement circuit comprises a temperature sensor and an electronic controller, wherein the temperature sensor is used for acquiring the environmental temperature; the electronic controller comprises a cold junction temperature compensator and a pair of binding posts connected with the cold junction temperature compensator, and the cold junction temperature compensator is connected with the temperature sensor and used for performing temperature compensation on a cold junction of a thermocouple according to the environmental temperature acquired by the temperature sensor; the cold junction temperature compensator is connected with the cold junction of the thermocouple through the pair of binding posts and a group of compensation leads, the materials of the pair of binding posts and the group of compensation leads are the same with that of a thermode of the thermocouple, and the cold junction temperature compensator is mounted close to the pair of binding posts. Precise measurement of the temperature of the cold junction temperature compensator and a pair of binding posts thermocouple is realized through organic integration of the compensation leads and the temperature sensor, meanwhile, longer-distance reliable transmission of mV-level temperature signals in an auxiliary power unit system is guaranteed, and the precision and reliability of the temperature signals are improved.
Description
technical field [0001] The invention relates to the design field of electronic controllers of aeroengines, in particular to a thermocouple cold junction compensation temperature measurement circuit. In addition, the present invention also relates to a thermocouple cold junction compensation temperature measurement device comprising the thermocouple cold junction compensation temperature measurement circuit. Background technique [0002] Thermocouples are currently the most widely used sensing elements for temperature measurement. The thermocouple is also commonly used on the engine as a temperature sensor to sense the temperature of the engine's heating components, and the supply control system is used as one of the basis for judging the working state of the engine. Among them, the K-type nickel-chromium-nickel-silicon thermocouple is widely used in the gas temperature sensor to measure the gas temperature of the engine due to its wide measurement range of -200 ° C to 1200 ...
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IPC IPC(8): G01K7/13
CPCG01K7/13
Inventor 袁伟朱文光桂晓玉薛晓波李明沈领
Owner CHINA HANGFA SOUTH IND CO LTD
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