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液氮比较器是一种可以提供恒定低温(-196℃)环境的设备,可以应用于低温温度计、低温变送器的鉴定和校准工作。文章利用数值模拟和试验相结合的方式得到一种新型液氮比较器的温度均匀性和温度波动性,从而验证了其作为温度计量标准的可行性,并结合数值模拟的结果对该设备提出一些改进意见。
Liquid nitrogen comparator is a device that can provide a constant low temperature (-196 ℃) environment, can be applied to the identification and calibration of low temperature thermometer, low temperature transmitter. In this paper, the temperature homogeneity and temperature fluctuation of a new type of liquid nitrogen comparator are obtained by the combination of numerical simulation and experiment, which verifies the feasibility of the method as a temperature measurement standard. Combined with the numerical simulation results, Improve your opinion.