应用于标准光电高温计的多点控温系统设计

Design of multi-point temperature control system applied to standard photoelectric pyrometer

为满足精密测温需求,解决标准光电高温计测温结果易受环境温度影响的问题,设计多点控温系统,该系统通过多点布控的方式实现内层壳体整体控温,应用薄膜加热片作为控温元件,并采用自主设计的控温电路。开展试验对该系统的控温稳定性、重复性以及标准光电的测温稳定性进行了验证,结果表明多点控温系统稳定后2.5 h波动0.09℃,三天控温重复性0.1℃。室温环境下,应用标准光电高温计测试银固定点黑体辐射源,使用多点控温系统与不使用多点控温系统时的测温波动分别为0.1℃和0.7℃。本文研制的标准光电高温计多点控温系统具有稳定性好、体积小、重量轻、易于控制等优点,能够有效满足标准光电高温计的精密测温需求,为促进国产精密测温仪器的性能提升起到推动作用。

In order to meet the needs of precision temperature measurement and solve the problem that the temperature measurement results of standard photoelectric pyrometers are easily affected by the ambient temperature,a multi-point temperature control system is designed.The system realizes the overall temperature control of the inner shell through multi-point control.The thin-film heating sheet is used as the temperature control element,and the self-designed temperature control circuit is adopted.Tests were carried out to verify the temperature control stability and repeatability of the system and the temperature measurement stability of the standard photoelectric pyrometer.The results showed that the multi-point temperature control system fluctuated 0.09℃in 2.5 hours after it was stable,and the temperature control repeatability for three days was 0.1℃.At room temperature,a standard photoelectric pyrometer is used to test the silver fixed-point blackbody radiation source.The temperature fluctuations when using the multi-point temperature control system and not using the multi-point temperature control system are 0.1℃and 0.7℃respectively.The multi-point temperature control system of the standard photoelectric pyrometer introduced in this paper has the advantages of good stability,small volume,light weight,easy control and so on.It can effectively meet the precision temperature measurement needs of the standard photoelectric pyrometer and promote the performance improvement of domestic precision temperature measurement instruments.