动态红外成像系统MRTD的测试与分析

提出一种在正弦运动状态下测试红外热像仪最小可分辨温差(MRTD)的方法,建立了正弦运动状态下测试靶标灰度对比度变化的数学模型,采用MATLAB软件模拟得到该数学模型曲线,从理论上直观地阐述了在正弦运动下,目标四杆靶灰度对比度的变化趋势,为MRTD的动态测试提供了坚实的理论基础。论文设计并研制了实验平台,采用统计学方法对实验数据进行分析,得到扰动情况下红外热像仪的MRTD值。实验结果表明,提出的方法和实验装置能准确地完成动态MRTD的测试。

Measurement and analysis of infrared imaging system's MRTD under sinusoidal motion

A method of measuring dynamic MRTD of infrared imaging system under sinusoidal motion is presented,the mathematical model of the four-bar-target gray contrast change is established,the mathematical model curves are obtained by MATLAB.This explains the change of the four-bar-target gray contrast under sinusoidal motion and establishes the theoretical foundation for the dynamical MRTD measurement.The experimental platform was designed and developed,the experimental data was analyzed by the statistical methods,the dynamic MRTD of the infrared imaging system was gotten under sinusoidal motion.Experimentation result shows that measurement of dynamic MRTD can be achieved by utilizing the proposed method and the developed experimental facilities.