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| Study on Dynamic Characteristics of Temperature Sensors under Different Heat Transfer Modes |
| JIA Chao,CAI Jie,XIONG Zhao-hui |
| Metrology and Testing Center, China Academy of Engineering Physics, Mianyang, Sichuan 621900, China |
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Abstract In order to study the influences of the heat transfer modes on the dynamic characteristics of temperature sensors, the relationship between the heat transfer mode and the dynamic characteristics of temperature sensors was derived by the theory of time constant, and the dynamic characteristics of temperature sensors were analyzed under different heat transfer modes. The heat transfer models of the temperature sensors were established with the modes of convection heat transfer and radiation heat transfer, and the thermocouple time constant were tested via the oil bath method and the pulsed laser method. The test results showed that the time constant test values of the thermocouple in convection heat transfer and radiation heat transfer mode are 1.2s and 6.2s respectively. It can be seen that the heat transfer mode directly affects the dynamic characteristics of the temperature sensor, and finally the rationality of the heat transfer model can be verified by comparing the test values and the theoretical calculations values.
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Received: 08 November 2018
Published: 14 May 2020
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2020, Vol. 41 
