凝视型激光主动成像系统性能验证

发布时间：2018-08-14 12:44

【摘要】：为了研究凝视型激光主动成像系统对非合作目标的成像性能及在目标跟踪中的应用,设计了基于APD阵列和分束照明的凝视型激光主动成像系统。对激光回波功率与目标距离之间的关系进行了理论分析,结果显示:200m外目标的回波功率小于1μW。为提高系统作用距离,选取高增益带宽积跨阻放大器OPA657N提高系统增益,并通过优化元件布局来克服高跨阻值时的通道串扰。实验验证了距离方程的正确性。在此基础上,采用八连通团块检测方法实现目标探测,并对两轴目标跟踪进行了实验验证。结果显示:系统能够对200m处非合作目标稳定成像,并能获取420m处非合作目标的回波信号;当目标在俯仰轴、偏航轴方向行程大于2.5°时,系统能够实时探测并稳定跟踪。
[Abstract]:In order to study the imaging performance of staring laser active imaging system for non-cooperative targets and its application in target tracking, a staring laser active imaging system based on APD array and beam splitting illumination was designed. The relationship between the laser echo power and the target distance is theoretically analyzed. The results show that the echo power of the target is less than 1 渭 W. In order to improve the operating distance of the system, the high gain bandwidth product transresistance amplifier (OPA657N) is selected to improve the system gain, and the channel crosstalk is overcome by optimizing the element layout. The correctness of the distance equation is verified by experiments. On this basis, the eight connected block detection method is used to realize the target detection, and the experimental verification of the two-axis target tracking is carried out. The results show that the system can stably image the non-cooperative target at 200m and obtain the echo signal of the non-cooperative target at 420m. When the target is on the pitch axis and the travel of the yaw axis is more than 2.5 掳, the system can detect and track the target stably in real time.
【作者单位】：中国科学院苏州生物医学工程技术研究所;中国科学院航空光学成像与测量重点实验室;
【基金】：中国科学院国防科技创新基金资助项目(No.CXJJ-14-S123) 吉林省科技发展计划资助项目(No.20150204022GX)
【分类号】：TN249;V243.5

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