动态红外场景仿真的灰度调制成像技术  

Dynamic infrared scene simulation using grayscale modulation imaging

作　　者：张凯[1] 黄勇[1] 孙力[1] 闫杰[1] 

机构地区：[1]西北工业大学航天学院,陕西西安710072

出　　处：《红外与激光工程》2012年第9期2283-2287,共5页Infrared and Laser Engineering

基　　金：中国博士后科学基金(20090461314)

摘　　要：红外场景仿真是红外成像制导武器设计、研制和生产过程中发现和解决问题的主要手段。文中针对红外场景仿真技术中的调制成像核心问题展开研究,在分析DMD系统灰度调制成像的基础上,借鉴PWM脉宽调制机理实现数字灰度调制技术,建立了DMD红外图像调制成像模型,研制了基于DMD图像灰度调制方法的红外场景仿真技术原理验证样机。验证结果表明,基于DMD灰度调制方式的红外场景仿真技术具备较高灰度等级、小几何畸变、高成像分辨率和对比度的技术特点,较好地满足了实验室内红外场景仿真的需要。Dynamic infrared scene simulation is an important means to discover and solve the problems encountered in designing,developing and manufacturing infrared imaging guidance weapons.The infrared scene simulation was explored by developing the digital grayscale modulation technology.The infrared image modulation model of a digital micro-mirror device（DMD） was established and the infrared scene simulator prototype was developed which was based on DMD grayscale modulation.To evaluate its main technical specifications as resolution,contrast,minimum temperature difference,gray scale,various DMD subsystems were studied and designed such as signal decoding,image normalization,synchronization driving,pulse width modulation（PWM） and DMD chip periphery circuits.Real-time infrared scene was created using the sensor-vision module of the Vega.The simulator was tested on a certain infrared missile seeker.The experimental results show preliminarily that the infrared scene simulator has high gray scale,small geometrical deformation,high imaging resolution and contrast,and yields high-fidelity images,which meets the needs of the infrared scene simulation inside a laboratory.

关 键 词：红外场景仿真 数字灰度调制 DMD PWM 灰度等级 

分 类 号：TN215[电子电信—物理电子学]