Compensation Method for Temperature Distribution Measured by Infrared Thermography for Non-flat Surfaces

FU Wanchao; FAN Chunli; YANG Li

Volume 43 Issue 2

Mar. 2021

Turn off MathJax

Article Contents

Article Navigation > Infrared Technology > 2021 > 43(2): 179-185

FU Wanchao, FAN Chunli, YANG Li. Compensation Method for Temperature Distribution Measured by Infrared Thermography for Non-flat Surfaces[J]. Infrared Technology , 2021, 43(2): 179-185.

Citation:

FU Wanchao, FAN Chunli, YANG Li. Compensation Method for Temperature Distribution Measured by Infrared Thermography for Non-flat Surfaces[J]. Infrared Technology , 2021, 43(2): 179-185.

FU Wanchao, FAN Chunli, YANG Li. Compensation Method for Temperature Distribution Measured by Infrared Thermography for Non-flat Surfaces[J]. Infrared Technology , 2021, 43(2): 179-185.

Citation:

FU Wanchao, FAN Chunli, YANG Li. Compensation Method for Temperature Distribution Measured by Infrared Thermography for Non-flat Surfaces[J]. Infrared Technology , 2021, 43(2): 179-185.

PDF( 730 KB)

Compensation Method for Temperature Distribution Measured by Infrared Thermography for Non-flat Surfaces

College of Power Engineering, Naval University of Engineering, Wuhan 430033, China

Received Date: 2020-07-29
Rev Recd Date: 2020-08-20
Publish Date: 2021-02-20

Abstract

Abstract

When employing an infrared thermal imager to measure surface temperature, the emissivity of the surface to be measured should be set first and kept constant during the measurement process. However, when the infrared imager is placed in the range of more than 50° of the zenith angle of the points to be measured, the emissivities of the points in this angle will vary significantly; hence, temperature measurement errors will occur, especially for points on non-flat surfaces. In view of the measurement error caused by the variation of emissivity of different points in the measured non-flat surface when using a monocular infrared thermal imager, this paper provides a compensation factor based on the variation rules of the emissivity with the measuring angle. In addition, based on 3D modeling technology, the relationship between the positions of the points in the thermographic image and those in the actual surface is determined. The compensation method of the temperature measurements for a non-flat surface is presented. The feasibility of the method was verified through experiments.
- thermographic non-destructive inspection,
- infrared imager,
- temperature measurement error,
- compensation method,
- non-flat surface

FullText(HTML)

References(13)

References

[1]	杨立, 杨桢. 红外热成像测温原理与技术[M]. 北京: 科学出版社, 2016. YANG Li, YANG Zhen. Theory and Technology of Temperature Measurement by Infrared Thermography[M]. Beijing: Beijing Science Press, 2016.
[2]	范春利. 几何形状导热反问题方法与应用[M]. 北京: 科学出版社, 2015. FAN Chunli. Geometric Inverse Heat Conduction Problems: Methods and Applications[M]. Beijing: Science Press, 2015.
[3]	廖盼盼, 张佳民. 红外测温精度的影响因素及补偿方法的研究[J]. 红外技术, 2017, 39(2): 173-177. http://hwjs.nvir.cn/article/id/hwjs201702012 LIAO Panpan, ZHANG Jiamin. Research on influence factors for measuring and method of correction in infrared thermometer[J]. Infrared Technology, 2017, 39(2): 173-177. http://hwjs.nvir.cn/article/id/hwjs201702012
[4]	刘慧开, 杨立. 太阳辐射对红外热像仪测温误差的影响[J]. 红外技术, 2002, 24(1): 34-37. doi: 10.3969/j.issn.1001-8891.2002.01.010 LIU Huikai, YANG Li. Effect of radiation of the sun on infrared temperature measurement[J]. Infrared Technology, 2002, 24(1): 34-37. doi: 10.3969/j.issn.1001-8891.2002.01.010
[5]	吕游, 杨波, 魏仲慧, 等. 大气与环境影响分析的红外比色测温方法[J]. 红外与激光工程, 2015, 44(8): 2321. doi: 10.3969/j.issn.1007-2276.2015.08.015 LV You, YANG Bo, WEI Zhonghui, et al. Middle infrared colorimetric temperature measurement method considered influence of atmosphere and ambient[J]. Infrared and Laser Engineering, 2015, 44(8): 2321. doi: 10.3969/j.issn.1007-2276.2015.08.015
[6]	石东平, 吴超, 李孜军, 等. 基于反射温度补偿及入射温度补偿的红外测温影响分析[J]. 红外与激光工程, 2015, 44(8): 0204006. https://www.cnki.com.cn/Article/CJFDTOTAL-HWYJ201508016.htm SHI Dongping, WU Chao, LI Zijun, et al. Analysis of the influence of infrared temperature measurement based on reflected temperature compensation and incidence temperature compensation[J]. Infrared and Laser Engineering, 2015, 44(8): 0204006. https://www.cnki.com.cn/Article/CJFDTOTAL-HWYJ201508016.htm
[7]	张健, 杨立, 刘慧开. 环境高温物体对红外热像仪测温误差的影响[J]. 红外技术, 2005, 27(5): 419-422. doi: 10.3969/j.issn.1001-8891.2005.05.017 ZHANG Jian, YANG Li, LIU Huikai. Effect of environmental object on infrared temperature measurement[J]. Infrared Technology, 2005, 27(5): 419-422. doi: 10.3969/j.issn.1001-8891.2005.05.017
[8]	周志成, 魏旭, 谢天喜, 等. 观测距离及视角对红外热辐射检测的影响研究[J]. 红外技术, 2017, 39(1): 86-90. http://hwjs.nvir.cn/article/id/hwjs201701016 ZHOU Zhicheng, WEI Xu, XIE Tianxi, et al. Influence of observation distance and angle of view on the detection accuracy of infrared thermal radiation[J]. Infrared Technology, 2017, 39(1): 86-90. http://hwjs.nvir.cn/article/id/hwjs201701016
[9]	杜玉玺, 胡振琪, 葛运航, 等. 距离对不同强度热源红外测温影响及补偿[J]. 红外技术, 2019, 41(10): 976-981. http://hwjs.nvir.cn/article/id/hwjs201910014 DU Yuxi, HU Zhenqi, GE Yunhang, et al. Distance influence and compensation of infrared temperature measurement with different intensity heat sources[J]. Infrared Technology, 2019, 41(10): 976-981. http://hwjs.nvir.cn/article/id/hwjs201910014
[10]	范春利, 杨立, 华顺芳. 热探测器温度对红外热像仪测温的影响[J]. 红外技术, 2002, 24(5): 22-24. doi: 10.3969/j.issn.1001-8891.2002.05.006 FAN Chunli, YANG Li, HUA Shunfang. Effect of temperature of thermal detector on temperature measurement of uncooled infrared thermography[J]. Infrared Technology, 2002, 24(5): 22-24. doi: 10.3969/j.issn.1001-8891.2002.05.006
[11]	Mikhail Polyanskiy. Refractiveindex.info database[DB/OL].[2020-04-01] https://refractiveindex.info/2008-2020.
[12]	马颂德, 张正友. 计算机视觉: 计算理论与算法基础[M]. 北京: 科学出版社, 1998. MA S, ZHANG Z. Computer Vision Algorithms and the Theoretical Calculation Based[M]. Beijing: Science Press, 1998.
[13]	ZHANG Z. A flexible new technique for camera calibration[J]. IEEE Transactions on Pattern Analysis & Machine Intelligence, 2000, 22(11): 1330-1334. http://dl.acm.org/citation.cfm?id=357025