Influence of environment on temperature measurement precision based on middle-wave IRFPA
-
摘要: 为了分析环境辐射和大气吸收对红外辐射特性测量精度的影响,对基于中波红外探测器的红外测温进行了研究。首先,介绍了影响中波红外探测器测温精度的几种辐射能,根据测温模型得出了红外探测器像元灰度值和辐射照度之间的关系公式,并进一步推导出辐射测温的修正公式。以高精度面黑体为目标进行了测温实验,对红外探测器像元的灰度值进行修正并计算测温误差。结果显示,修正前、后测温误差的均方根分别为3.56 ℃和0.27 ℃,测温精度得到了显著的提高,表明该修正公式可准确地修正环境和大气吸收对中波红外探测器测温精度的影响。Abstract: In order to analysis the influences of environment radiation and atmosphere absorbing on the measurement precision, the infrared temperature measurement by using a middle-wavelength infrared detector is studied. Firstly, several environment radiations which influence the measurement precision of a middle-wave Infrared Focal Plane Array(IRFPA) are introduced, and the relation between the gray and the absorbed radiation of the infrared detector is deduced. Then the amending formulae of environment radiations are achieved. Using the blackbody as the measurement target, the measurement error are 3.56 ℃ and 0.27 ℃ before and after amendings, respectively, and the measurement precision is improved evidently. The results show that the amending formulae could modify the influences of environment radiation and atmosphere absorbing correctly.
-
[1] DATCU S,IBOS L,CANDAU Y,et al.. Improvement of building wall surface temperature measurements by infrared thermography[J]. Infrared Physics Technol.,2005,46(6):451-467. [2] 杨立. 红外热像仪测温计算与误差分析[J]. 红外技术 ,1997,21(4):20-24. YANG L. Calculation and error analysis of temperature measurement using thermal imager[J]. Infrared Technol.,1997,21(4):20-24.(in Chinese) [3] 郁道银,谈恒英.工程光学[M]. 北京:机械工业出版社,1999:70-71. YU D Y,TAN H Y. Eengineering Optics[M]. Beijing:China Machine Press,1999:70-71.(in Chinese) [4] 《红外与 工程》编辑部.红外成像系统测试与评价[M]. 张正辉,魏宇飞 ,译.哈尔滨:哈尔滨工业大学,2006. 《Infrared and Laser Engineering》 Editorial Office. Testing and Evaluating of Infrared Imaging System[M]. ZHANG ZH H,WEI Y F. Harbin:Harbin Institute of Technology,2006.(in Chinese) [5] 范纪红,侯西旗,杨照金. 红外探测器光谱响应度测试技术研究[J]. 应用光学 ,2006,27(5):461-462. FAN J H,HOU X Q,YANG ZH J. Technology research of infrared detector's spectrum response[J]. Appl. Opt.,2006,27(5):461-462.(in Chinese) [6] 邢强林. 红外焦平面成像探测辐射特性测量标定方法研究[J]. 飞行器测控学报 ,2007,26(4):68-71. XING Q L. Calibration for FPA infrared radiation measuring system[J]. J. Spacecraft TT&C Technol.,2007,26(4):68-71.(in Chinese) [7] 孙志远,朱玮,乔彦峰. 红外测温过程中灰度值漂移的修正[J]. 中国光学与应用光学 ,2010,3(4):391-396. SUN ZH Y,ZHU W,QIAO Y F. Amendment of gray drift in infrared temperature measurement[J]. Chinese J. Opt. Appl. Opt.,2010,3(4):391-396.(in Chinese) [8] 吴晗平. 红外辐射大气透过率的工程理论计算方法研究[J]. 光学 精密工程 ,1998,6(4):35-43. WU H P. Research into theoretical calculation method on engineering of transmittance of infrared radiation through atmosphere[J]. Opt. Precision Eng.,1998,6(4):35-43.(in Chinese) [9] 李云红,孙晓刚,原桂彬. 红外热像仪精确测温技术[J]. 光学 精密工程 ,2007,15(9):1336-1341. LI Y H,SUN X G,YUAN G B. Accurate measuring temperature with infrared thermal imager[J]. Opt. Precision Eng.,2007,15(9):1336-1341.(in Chinese) [10] 胡剑虹,宁飞,沈湘衡,等. 目标表面发射率对红外热像仪测温精度的影响[J]. 中国光学与应用光学 ,2010,3(2):152-156. HU J H,NING F,SHEN X H,et al.. Influence of surface emissivity of objects on measuring accuracy of infrared thermal imagers[J]. Chinese J. Opt. Appl. Opt.,2010,3(2):152-156.(in Chinese)
点击查看大图
计量
- 文章访问数: 4590
- HTML全文浏览量: 446
- PDF下载量: 1775
- 被引次数: 0