红外热成像系统温度漂移补偿算法研究

Study on temperature drift compensation of infrared thermal imaging system

针对红外焦平面阵列(infrared focal plane arrays,IRFPA)响应输出易受到环境温度变化的影响,且长时间工作后易发生温度漂移,导致红外热成像系统测温误差大,为此提出了一种红外热成像系统温度漂移补偿算法。该算法建立了红外焦平面阵列响应输出随环境温度变化的补偿模型,利用该模型对IRFPA每个像素响应输出值进行逐一修正。将该补偿算法加入红外热成像系统中,进行红外目标的温度显示实验。实验结果表明,该算法能够有效减少环境温度变化引起的测温误差,提高红外热成像系统的测温精度。

Influenced by environmental temperature,infrared focal plane arrays（IRFPA） response output has obvious temperature drift after working for a long time,which causes larger temperature measurement error of infrared thermal imaging system（ITIS）.Therefore,a temperature drift compensation algorithm of ITIS is presented.The algorithm establishes a temperature compensable model for IRFPA response output drift with the environmental temperature,which can correct the drift value of every detector response output.With this compensation algorithm,some infrared object temperature display experiments in ITIS have been done.The experimental results show that the algorithm can effectively reduce temperature drift caused by the environmental temperature,and temperature measuring accuracy of ITIS can be greatly improved.