A kind of temperature sensor and temperature measurement method
A technology of temperature sensor and sensing unit, applied in the field of temperature sensing, can solve the problems of inaccurate measurement of potential difference, limiting the maximum temperature of thermocouple, etc.
Active Publication Date: 2019-12-20
PEKING UNIV
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Problems solved by technology
The interface between the two metals creates a contact resistance, resulting in inaccurate potential difference measurements
Also, since the melting point of the alloy is lower than that of the metals that make it up, this limits the maximum temperature that the thermocouple can measure
Method used
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[0031] Specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
[0032] figure 1 It is a schematic diagram of the principle of a thermocouple that is currently widely used. Such as figure 1 As shown, the thermocouple includes a first metal arm 101 , a second metal arm 102 and a temperature measuring junction 103 . Wherein, the metal constituting the first metal arm 101 and the metal constituting the second metal arm 102 are different kinds of metals. The temperature measuring junction region 103 is connected to the first metal arm 101, for example, in figure 1 The point A shown is connected; the temperature measuring junction area 103 is connected with the second metal arm 102, for example, in figure 1 Point B connection shown. For example, one end of the first metal arm 101 and the second metal arm 102 are connected in a molten state, and then cooled, and the cooled connection part serves as the tempera...
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Abstract
The invention provides a temperature sensor and a corresponding temperature measurement method, which can be used for measuring high temperature more than 2000K-3000K. The temperature sensor comprises a temperature measurement junction area, a thick arm and a thin arm, wherein one end of the thick arm is connected with one end of the temperature measurement junction area; one end of the thin arm is connected with the other end of the temperature measurement junction area; the material of the thick arm is substantially the same with the material of the thin arm; the material of the thick arm is substantially the same with the material of the temperature measurement junction area; and the cross sectional area of the thick arm is larger than the cross sectional area of the thin arm. The temperature measurement method is characterized by enabling the temperature measurement junction area of the temperature sensor to make contact with an object to be measured, and calculating the temperature of the object to be measured based on potential difference between the thick arm and the thin arm. The temperature sensor solves the problem that contact resistance causing errors exists since the temperature measurement junction area made of alloy in a conventional thermocouple is low in melting point, and improves temperature measurement accuracy and temperature measurement range.
Description
technical field [0001] The invention relates to the field of temperature sensing, in particular to a high-temperature temperature sensor capable of measuring 2000K-3000K and a temperature measuring method. Background technique [0002] A temperature sensor is a sensor used to convert a temperature signal into other signals to measure temperature. It is of great significance in various fields such as aerospace, automobile, and medical treatment. Temperature sensors are divided into non-contact temperature sensors and contact temperature sensors. A contact temperature sensor refers to a sensor that measures temperature by contacting the temperature measurement area of the sensor with the object to be measured. It has the advantages of high measurement accuracy and wide application range. [0003] Thermocouple is a kind of contact temperature sensor which is widely used at present. The temperature of the object to be measured can be obtained by measuring the potential diff...
Claims
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IPC IPC(8): G01K7/04
CPCG01K7/04
Inventor 李刚苏小惠孙伟强杨凡许胜勇
Owner PEKING UNIV