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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

Inactive Publication Date: 2019-03-29
NAT INST OF METROLOGY CHINA
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  • Summary
  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

Platinum resistance thermometers are widely used due to their measurement accuracy. However, platinum resistance thermometers require a long response time during temperature measurement, which makes the measurement time longer
[0004] As far as the current standard platinum resistance thermometers and thermocouples are concerned, they cannot meet the dual needs of users for measurement accuracy and response time

Method used

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

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Embodiment Construction

[0015] In order to facilitate the understanding of the present invention, the embodiments of the present invention will be described below in conjunction with the accompanying drawings. Those skilled in the art should understand that the following description is only for the convenience of explaining the present invention, not as a specific limitation on its scope.

[0016] Such as figure 1 As shown, as a conventional standard platinum resistance thermometer, the standard platinum resistance thermometer includes a shell 1 with an open end and a handle part 2 that matches the opening of the shell 1. Preferably, the shell is a quartz shell or a corundum shell or a high temperature resistant shell. A stainless steel casing, a skeleton 3 is arranged in the quartz casing 1, and the skeleton 3 is made of quartz or corundum material, and a platinum resistance temperature sensing element 4 is arranged on the skeleton, and the platinum resistance temperature sensing element 4 is wound a...

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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.

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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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01K7/02G01K7/18G01K15/00
CPCG01K7/02G01K7/18G01K15/005
Inventor 孙建平
Owner NAT INST OF METROLOGY CHINA
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