激光与光电子学进展, 2016, 53 (9): 091201, 网络出版: 2016-09-14
弥散介质遮蔽表面的红外成像测温方法
Infrared Imaging Temperature Measurement for a Shielded Surface by Diffuse Medium
测量 红外成像测温 米氏散射理论 弥散介质 透射率 measurement infrared imaging temperature measurement Mie scattering theory diffuse medium transmissivity
摘要
弥散介质遮蔽表面的红外成像精确测温问题可归结为遮蔽物对热像仪工作波段光学厚度的准确测算。以细水雾遮蔽下的目标红外成像测温为例,通过理论和实验分析,确定具体的测量方法为通过粒子测量系统可以确定弥散介质的几何参数(粒度、浓度、厚度等);结合米氏散射理论计算获得其光学衰减系数;采用朗伯比尔定律计算弥散介质的透射率;通过设定红外热像仪中的大气透射率参数完成对待测目标的准确的红外成像测温。实验证明,该方法可准确测定弥散介质遮蔽表面的温度。而对实际应用问题,提出了通过估算的方法来确定大气透射率。
Abstract
The issue of precise measurement of the infrared imaging temperature on a surface shielded by diffuse medium can be attributed to accurate calculation of the spectral bands optical depth of the medium at which the infrared image works. Infrared imagery temperature of the object shielded by the fine water sprays is taken as examples. A specific measurement method is presented by theoretical and experimental analysis. The geometrical parameters of diffuse medium (particle size, concentration, depth and so on) are measured by particle measuring system, the optical extinction coefficients combined with the theoretical calculation of Mie scattering are obtained, and the air transmissivity of the medium with Lambert-Beer law is calculated. Though setting the atmospheric transmission parameters in the infrared image, and complete the operation of accurate temperature measurement. Experimental results show that this method can accurately measure the surface temperature of the dispersion medium shield. As to the problem of the practical application, a method to estimate atmospheric transmissivity is proposed.
刘永翔, 张健, 杜永成. 弥散介质遮蔽表面的红外成像测温方法[J]. 激光与光电子学进展, 2016, 53(9): 091201. Liu Yongxiang, Zhang Jian, Du Yongcheng. Infrared Imaging Temperature Measurement for a Shielded Surface by Diffuse Medium[J]. Laser & Optoelectronics Progress, 2016, 53(9): 091201.