补偿强反光体表面红外测温误差的算法研究
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摘要
针对运动强反光体表面温度实时测量困难、精度低这一难点,本文从红外测温原理入手,分析并揭示了红外测温精度易受到被测物体反射率、测量距离、测量环境、红外入射角等因素的影响。根据铝板材加工设备轧辊表面测温实际需要设计了一种利用红外传感器实现对强反光体表面温度点对点测量的方案。通过对测量数据的研究分析建立了一种基于斯忒藩定律的红外入射角度补偿算法,以此减小因红外入射角度变化产生的测温误差。实验结果证明本方法能较好地弥补红外入射角度变化产生的测温误差,提高测温精度。该补偿算法运算简单,适应性强,为改善入射角度变化对测温精度影响提供了新的方法。
For the difficult measurement and low measurement accuracy on the surface temperature of a strong reflector,starting from the principle of infrared temperature measurement,it is analyzed and revealed that the precision of infrared temperature measurement is easily affected by the reflectivity,the measuring distance,the measuring environment and the infrared incidence angle of the object under test in this paper. According to the actual requirement of measuring the surface temperature of the roll in an aluminum sheet processing equipment,a scheme of measuring the surface temperature point-to-point of a strong reflector by infrared sensor is designed. Through the research and analysis of the measured data,an infrared incident angle compensation algorithm based on the Stefan's law is established to reduce the temperature measurement error caused by the change of the infrared incident angle. Experimental results show that this method can make up for the error of temperature measurement caused by the change of infrared incidence angle and improve the precision of temperature measurement. The compensation algorithm has simple operation and strong adaptability and provides a new method to improve the influence of the incident angle on the temperature measurement accuracy.
For the difficult measurement and low measurement accuracy on the surface temperature of a strong reflector,starting from the principle of infrared temperature measurement,it is analyzed and revealed that the precision of infrared temperature measurement is easily affected by the reflectivity,the measuring distance,the measuring environment and the infrared incidence angle of the object under test in this paper. According to the actual requirement of measuring the surface temperature of the roll in an aluminum sheet processing equipment,a scheme of measuring the surface temperature point-to-point of a strong reflector by infrared sensor is designed. Through the research and analysis of the measured data,an infrared incident angle compensation algorithm based on the Stefan's law is established to reduce the temperature measurement error caused by the change of the infrared incident angle. Experimental results show that this method can make up for the error of temperature measurement caused by the change of infrared incidence angle and improve the precision of temperature measurement. The compensation algorithm has simple operation and strong adaptability and provides a new method to improve the influence of the incident angle on the temperature measurement accuracy.
引文
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[13] MENG Fanwei,GAO Yue,MA Cuihong,et al.Infrared temperature measurement model for molten metal based on thermal radiation theory[J].Infrared Technology,2017,39(8):766-771.(in Chinese)孟凡伟,高悦,马翠红,等.基于热辐射理论的熔融金属红外测温模型研究[J].红外技术,2017,39(8):766-771.
[14] FU Dongmei,SHI Yanan,YANG Tao,et al.Calibration method of infrared measurement of surface temperature for heating furnace tube[J].Laser & Infrared,2016,46(12):1486-1490.(in Chinese)付冬梅,石雅楠,杨焘,等.一种加热炉炉管表面红外检测温度的修正方法[J].激光与红外,2016,46(12):1486-1490.
[2] Atas Berksoy,Bag Ozlem,Yazici Selcuk,et al .Use of noncontact thermography to measure temperature in children in a triage room[J].Medicine,2018,97(5):e9737.
[3] Lucchi,Elena.Applications of the infared thermography in the energy audit of buildings:a review[J].Renewable & Sustainable Energy Reviews,2018,82:3077-3090.
[4] CAO Hongyan,CHEN Xizhang,HU Chao,et al.Weliding quality online detection based on infrared temperature measurement[J].Journal of Shanghai Jiao Tong University,2016,50(sup.):66-70.(in Chinese)曹宏岩,陈希章,胡超,等.基于红外温度场的焊接质量在线检测方法[J].上海交通大学学报,2016,50(增刊):66-70.
[5] YANG Qingbo,WEI Zhuo,HU Siquan,et al.Application of infrared temperature-measuring technique in temperature monitoring of converter valve[J].Laser & Infrared,2018,48(1):73-78.(in Chinese)杨青波,魏卓,胡四全,等.红外测温技术在换流阀温度监测中的应用[J].激光与红外,2018,48(1):73-78.
[6] 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.(in Chinese)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.
[7] LI Yanfeng,ZHANG Zhijie,ZHAO Chenyang,et al.Surface band normal emissivity measurement using infrared thermal imager[J].Chinese Journal of Sensors and Actuators,2017,30(9):1348-1351.(in Chinese)李岩峰,张志杰,赵晨阳,等.利用红外热像仪进行物体表面波段法向发射率测量[J].传感技术学报,2017,30(9):1348-1351.
[8] LIU Chunhong,WU Haibin,XIONG Danfeng,et al.Nonlinear calibration method of detector in thermal radiation temperature measurement system[J].Chinese Journal of Quantum Electronics,2017,34(2):227-230.(in Chinese)刘纯红,吴海滨,熊丹枫,等.热辐射测温系统中探测器非线性校正方法[J].量子电子学报,2017,34(2):227-230.
[9] LIN Xiankun,FAN Zhenhua,WANG Yihan,et al.Online compensation of full-stroke thermal error for dual direct feed axis with hybrid KPLS and fuzzy logic method[J].Journal of Mechanical Engineering,2017,53(9):164-169.(in Chinese)林献坤,樊振华,王益涵,等.混合KPLS与模糊逻辑的双直接进给轴全行程热误差建模及补偿[J].机械工程学报,2017,53(9):164-169.
[10] Zhang C,Gauthier E,Pocheau C,et al.Surface temperature measurement of the plasma facing components with the multi-spectral infrared thermography diagnostics in tokamaks[J].Infrared Physics and Technology,2017,81:215-222.
[11] WANG Libin,XIE Taorong,ZHANG Jie,et al.Investigation on the infrared thermometer measurement dispersion induced by spatial temperature distribution[J].Chinese Journal of Scientific Instrument,2006,27(10):1288-1293.(in Chinese)王立斌,谢涛嵘,张杰,等.被测对象温度呈现空间分布时的红外测温偏差研究[J].仪器仪表学报,2006,27(10):1288-1293.
[12] CHANG Guoqiang,CHANG Haiping,WANG Yinhui,et al.Research on error analysis and correction of infrared temperature measurement for curved surface[J].Journal of Aerospace Power,2010,25(2):302-307.(in Chinese)常国强,常海萍,王寅会,等.曲面红外测温方向性误差分析与修正方法[J].航空动力学报,2010,25(2):302-307.
[13] MENG Fanwei,GAO Yue,MA Cuihong,et al.Infrared temperature measurement model for molten metal based on thermal radiation theory[J].Infrared Technology,2017,39(8):766-771.(in Chinese)孟凡伟,高悦,马翠红,等.基于热辐射理论的熔融金属红外测温模型研究[J].红外技术,2017,39(8):766-771.
[14] FU Dongmei,SHI Yanan,YANG Tao,et al.Calibration method of infrared measurement of surface temperature for heating furnace tube[J].Laser & Infrared,2016,46(12):1486-1490.(in Chinese)付冬梅,石雅楠,杨焘,等.一种加热炉炉管表面红外检测温度的修正方法[J].激光与红外,2016,46(12):1486-1490.
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