Self-calibrated double-thermocouple thermometer based on standard platinum resistance thermometer, and temperature measuring method implemented by self-calibrated double-thermocouple thermometer

A dual thermocouple and platinum resistance technology is applied in thermometer testing/calibration, thermometers, and thermometers using electric/magnetic elements that are directly sensitive to heat. Long response time and other issues, to achieve the effect of fast and accurate temperature measurement
CN109540316AInactive Publication Date: 2019-03-29NAT INST OF METROLOGY CHINA
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
NAT INST OF METROLOGY CHINA
Publication Date
2019-03-29
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention relates to a self-calibrated double-thermocouple thermometer based on a standard platinum resistance thermometer. The self-calibrated double-thermocouple thermometer comprises a casing,a handle part matched with the casing, and a platinum resistance temperature-sensing element located in the casing, wherein the platinum resistance temperature-sensing element comprises a first end and a second end; the first end of the platinum resistance temperature-sensing element is connected with a first thermocouple; and the second end of the platinum resistance temperature-sensing element is connected with a second thermocouple. The self-calibrated double-thermocouple thermometer provided by the invention has the advantages that online calibration of the thermocouples can be achieved through the platinum resistance temperature-sensing element, and the two thermocouples can be checked by each other, so that temperature measuring is quick and accurate.
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Description

technical field

[0001] The invention relates to a self-calibrating double thermocouple thermometer, in particular to a self-calibrating double thermocouple thermometer based on a standard platinum resistance thermometer and a temperature measuring method. Background technique

[0002] Thermocouple (thermocouple) is a commonly used temperature measuring element in temperature measuring instruments. It directly measures the temperature, and converts the temperature signal into a thermal electromotive force signal, and converts it into the temperature of the measured medium through an electrical instrument (secondary instrument). In occasions where the measurement accuracy is not high, a thermocouple is often used for fast measurement. Although the response time of the thermocouple is short, its measurement accuracy is relatively low.

[0003] The standard platinum resistance thermometer is an interpolation instrument that transmits the international temperature scale in the ra...

Claims

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