距离对红外热像仪测温精度的影响及误差修正  

Influence of Distance on Temperature Measurement Accuracy of Infrared Thermal Imager and Error Correction

作　　者：张勇[1] 王新赛[1] 贺明[1] 

机构地区：[1]防空兵指挥学院,河南郑州450052

出　　处：《红外》2011年第2期24-27,42,共5页Infrared

摘　　要：通过分析红外热像仪测温原理,得出距离是影响测温精度的因素之一。为了提高测温精度,设计了距离对红外热像仪测温影响的实验。首先利用黑体对红外热像仪进行标定,然后在不同距离处对黑体进行测温。实验结果表明,距离的变化对测温精度有较大影响。通过整理实验数据,得出了两种温度下距离对测温精度的影响曲线,并拟合出了误差修正公式。经过误差修正,两种温度下的最大测温误差均减小到了±0.1K,有效地提高了测温精度。Distance is one of the factors which affect the temperature measurement accuracy of an infrared thermal imager.To improve this temperature measurement accuracy,an experiment on demonstrating the effect of the distance on the temperature measurement accuracy of an infrared thermal imager is carried out.Firstly,a blackbody is used to calibrate the infrared thermal imager.Then,the temperature of the blackbody is measured at different distances.The experimental result shows that the variation of distance has a great effect on temperature measurement accuracy.According to the experimental data,the curves indicating the above effect at two different temperatures are obtained and a error correction formula is derived.Through error correction,the maximum temperature measurement errors at both different temperatures are reduced to±0.1K.The temperature measurement accuracy is improved effectively.

关 键 词：红外热像仪 测温 距离 误差修正 

分 类 号：TH811[机械工程—仪器科学与技术]