低温红外目标源控温技术

低温红外目标源是测试和标定低温红外传感器的响应线性度和非均匀性的关键测试设备.对所研制的低温红外目标源设备的工作原理进行了论述,同时基于有限元分析方法,以ANSYS 软件为载体对黑体面源控温方式及温度场分布进行模拟分析,并进行了测温实验.结果表明:所研制的低温红外目标源结构设计合理,仿真温度场与实测温度场分布规律一致,控温精度不大于0.5 K,黑体面源温度分布均匀,表面温差不大于0.2 K,稳定性好(0.1 K/min),可以满足低温红外系统的测试和检定要求.

Temperature control technology of cryogenic infrared target source

In order to correct the response linearity and non uniformity of infrared sensor, variable temperature and cryogenic infrared target device was developed. The working principle of the developed infrared target device which temperature was variable and cryogenic was discussed. The temperature control system of the blackbody source was analyzed by temperature field simulation based on finite element method in ANSYS software and temperature measurement experiment. The analysis and experimental results show that the cryogenic infrared target device developed is reasonable, and the distribution of simulated temperature field and measured temperature field is consistent, and temperature control precision(0.5 K) and stability(0.2 K) are high, and temperature distribution of the blackbody source is even(0.1 K/min). And the system can meet the test and verification requirement of cryogenic infrared system.