红外热成像系统作用距离预测方程计算误差探析

何恒; 白廷柱

红外技术, 2015, 37 (9): 713, 网络出版: 2015-11-30

红外热成像系统作用距离预测方程计算误差探析

Calculation Error Analysis of the Distance Equation for Infrared Imaging System

论文大纲

何恒白廷柱

作者单位

北京理工大学光电学院光电成像技术与系统教育部重点实验室，北京 100081

红外热成像温差计算误差作用距离 infrared thermal imaging temperature difference MRTD MRTD calculation error operation range

摘要

理论上讨论了能量传输过程中辐射出射度差和温差之间的关系，探讨了红外热成像系统作用距离方程小温差条件下近似计算的本质，分析了近似计算所产生的误差受温差大小、背景温度和工作波长影响的情况。基于MRTD 的定义和红外热像仪成像的原理，在前述探析的基础上，提出更为符合红外热成像物理过程的作用距离方程计算方法，并实例计算了给定条件下的作用距离。计算结果表明，本文提出的计算方法更为符合辐射能量实际传输情况，具有更好的精度。

Abstract

The paper theoretically discusses the relationship between the radiant exitance difference and temperature difference in the energy transmission, the nature of the approximate calculation under the condition of small temperature difference, and the error affected by approximate calculation influenced of the size of temperature difference, background temperature and wavelength. It also puts forward a calculation method which is more accord with the physical process of the infrared thermal imaging system adjusted by the definition of MRTD and the theory of the infrared imaging system. On this basis, the paper calculates the range of the given conditions. The results show that such method of calculation tallies more with the actuality and has better accuracy.

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何恒, 白廷柱. 红外热成像系统作用距离预测方程计算误差探析[J]. 红外技术, 2015, 37(9): 713. HE Heng, BAI Ting-zhu. Calculation Error Analysis of the Distance Equation for Infrared Imaging System[J]. Infrared Technology, 2015, 37(9): 713.

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