基于靶标辐射元的IR-JST温度反演方法研究

Research on the temperature inversion algorithm of IR-JST based on the target radiation element

红外成像干扰模拟靶标(JST)用以在红外成像导引系统(IRIGS)抗干扰性能测试中为IRIGS提供干扰源,目前普遍采用的数字仿真法受仿真精度的制约不能准确的模拟各类干扰源,为此本文提出了一种基于热电器件阵列的红外成像干扰模拟靶标生成方法。但是实验中发现在热像仪温度反演过程中,利用传统的黑体定标方法将引入发射率补偿误差,并且随着工作时间的增加,热像仪发生温度漂移现象,严重的影响了热像仪温度反演精度。针对以上问题,提出了一种基于靶标敏感单元的热像仪标定方法及漂移补偿算法,实验结果表明,该方法能够使热像仪温度反演误差由7℃降低至0.5℃。

Infrared imaging jamming simulation target(JST)is used to provide interference source for IRIGS in the anti-jamming performance test of infrared imaging guidance system(IRIGS).at present,the digital simulation method is widely adopted,but it cannot simulate all kinds of interference sources accurately,because of the limitation of simulation accuracy.For this reason,a generation methods of the JST for IRIGS was proposed.But in the experiment,it is found that the emissivity error is introduced when using the traditional blackbody calibration method,and with the increase of operate time,the phenomenon of temperature drift occurs,it seriously affects the temperature inversion accuracy of thermal imager.In view of the above problems,a calibration method and a drift compensation algorithm for thermal imager based on target radiation element are proposed.The experimental result shows that This method can reduce thermal imager temperature inversion error from 7°C to 0.5°C.