高精度非致冷长波红外热像仪的辐射标定

张晓龙; 刘英; 孙强

doi:10.3788/CO.20120503.0235

高精度非致冷长波红外热像仪的辐射标定

doi: 10.3788/CO.20120503.0235

张晓龙^1,2,
刘英¹,
孙强^1, ,

1.
中国科学院长春光学精密机械与物理研究所,吉林长春 130033;
2.
中国科学院研究生院,北京 100039

基金项目:

国家自然科学基金资助项目(No.60977001)

详细信息

通讯作者:
孙强

中图分类号: TN216; P407.6
计量
- 文章访问数: 3666
- HTML全文浏览量: 543
- PDF下载量: 1004
- 被引次数: 0
出版历程
- 收稿日期: 2012-02-21
- 修回日期: 2012-04-23
- 刊出日期: 2012-06-10

Radiometric calibration of uncooled long-wave infrared thermal imager with high-precision

1.
Changchun Institute of Optics,Fine Mechanics and Physics,Chinese Academy of Sciences,Changchun 130033,China;
2.
Graduate University of Chinese Academy of Sciences,Beijing 100039,China

摘要

摘要: 为使非致冷长波红外热像仪在不同温度下保持较高的测温精度,建立了考虑探测器工作温度效应的非致冷长波红外热像仪的辐射标定模型。对非致冷长波红外热像仪进行辐射标定实验,在不同黑体温度和不同亮度增益值条件下,获得了16组图像灰度与探测器工作温度之间的函数关系,建立了目标温度的数学计算模型,并对定标结果进行了实验验证。结果表明:在25~40 ℃,探测器的工作温度效应可做线性化处理,且与目标温度无关。通过设定合适的亮度增益值可使红外热像仪的测温误差＜0.5 ℃,极大地提高了非致冷长波红外热像仪在不同温度环境下的测温精度。
- 红外热像仪 /
- 辐射标定 /
- 温度测量 /
- 非致冷
Abstract: In order to achieve the high accuracy temperature measurement for a uncooled long-wave infrared thermal imager under different ambient temperatures, the radiometric calibration model of the infrared thermal imager is established in consideration of the effect of detector operation temperature. The radiometric calibration experiment is then conducted, and sixteen functional relations between image gray levels and detector operation temperatures at different blackbody temperatures and different brightness gain values are obtained. The mathematical calculation model of target temperature is established and the calibration result is verified by experiments. The results show that the detector operation temperature effect can be treated linearly in the range from 25 ℃ to 40 ℃, and it is independent on the target temperature. By setting an appropriate brightness gain, the temperature measurement error of the infrared thermal imager is less than 0.5 ℃, which is a great improvement of the measurement accuracy of the uncooled long-wave infrared thermal imager under different ambient temperatures.
- infrared thermal imager /
- radiometric calibration /
- temperature measurement /
- uncooling

HTML全文

参考文献(1)

[1] 李琼花,杨家德. 非致冷凝视红外焦平面阵列的特点及应用[J]. 重庆工学院学报 ,2003,17(1):48-50. LI Q H,YANG J D. The characteristics and applications of uncooled staring infrared focal plain array[J]. J. Chongqing Institute Technol.,2003,17(1):48-50.(in Chinese) [2] 孙恋君,张俊举,王世允,等. 非致冷微测辐射热计探测器工作温度特性研究[J]. 红外与毫米波学报 ,2007,26(3):232-236. SUN L J,ZHANG J J,WANG SH Y,et al.. Research on operating temperature characteristic of uncooled microbolometer detector[J]. J. Infrared Millim. Waves,2007,26(3):232-236.(in Chinese) [3] 黄英东,安建波. 基于改进多项式拟合的红外焦平面非均匀性校正方法[J]. 红外 ,2011,32(3):29-33. HUANG Y D,AN J B. A nonuniformity correction algorithm for IRFPA based on improved polynomial fitting[J]. Infrared,2011,32(3):29-33.(in Chinese) [4] DONG L Q,LIU X H,ZHAO Y J,et al.. Scene-based nonuniformity correction algorithm for MEMS-based un-cooled IR image system[J]. SPIE,2009,7419:74190Y. [5] ROBERT M P,DANIEL T P. Radiometric calibration of a longwave FPA camera for IR scene[J]. SPIE,2006,6208:680818. [6] WILLIAMS G M,BARTER A. Dual-band MWIR/LWIR radiometer for absolute temperature measurements[J]. SPIE,2006,6205:62050M. [7] 陆子凤. 红外热像仪的辐射定标和测温误差分析 .长春:中国科学院长春光学精密机械与物理研究所,2010. LU Z F. Calibration and measurement error analysis of infrared imaging system for temperature measurement . Changchun:Changchun Institute of Optics,Fine Mechanics and Physics,Chinese Academy of Sciences,2010.(in Chinese) [8] 乐逢宁,蔡静,马兰,等. 使用红外热像仪应注意的问题[J]. 计测技术 ,2010,30(增):100-101. YUE F N,CAI J,MA L,et al.. The problem should be attended when using IR thermal imager[J]. Calculate,Measure Technology,2010,30(s):100-101.(in Chinese) [9] 孙学金,刘剑,赵世军,等. 非致冷红外焦平面阵列的辐射定标模型[J]. 解放军理工大学学报 ,2008,9(4):399-403. SUN X J,LIU J,ZHAO SH J,et al.. Radiometric calibration model of uncooled infrared focal plane array[J]. J. PLA University of Science and Technology,2008,9(4):399-403.(in Chinese) [10] 张云涛,李涛,高太长. 基于人工神经网络的红外焦平面阵列定标方法[J]. 气象水文海洋仪器 ,2009(4):19-22. ZHANG Y T,LI T,GAO T CH. Calibration method of infrared focal plane arrays based on neural network[J]. Meteorological, Hydrological and Marine Instruments,2009(4):19-22.(in Chinese)

施引文献

附加信息(0)

访问统计