基于光纤延迟线的激光测距仪测距精度检测系统

【作者】 陈昊；

【导师】 李建欣； 安宝林；

【作者基本信息】 南京理工大学 ， 光学工程（专业学位）， 2016， 硕士

【摘要】 光电火控系统是使用光电传感器来控制射击武器自动瞄准与发射的装备的总称,已经在各种武器系统中普遍应用。为确保火控系统在实战中的打击精度和快速反应能力,我国引入了随行保障系统的概念,经过多年的研究,已经卓有成效。但是激光测距仪作为火控系统重要的组成部分,它的测距精度检测还少有专用的随行保障性系统。本文根据随行保障系统的特殊要求,围绕着光纤延迟和多光轴对准的应用技术,设计了一种用于激光测距仪测距精度检测的系统。系统选用中程长度的多模光纤作为传输系统,实现了模拟光程的技术要求。根据激光光束的光纤耦合特性设计了了大口径“前凸型”双片式激光耦合透镜。综合考虑激光测距仪的工作原理和结构,设计了一种CCD捕捉脉冲光斑的入射光轴对准系统和对应的系统软件。依据平行光管光轴校正技术设计了系统的出射端,结合入射光轴对准技术实现了激光测距仪的多光轴校准。考虑到系统光敏部件的阈值损伤,选择中性密度滤光片作为衰减系统。利用以上设计原理,对多模光纤以及CCD捕捉脉冲光斑技术进行了验证实验,实验表明了多光轴校准系统和多模光纤延迟技术的可行性。本文为校正标定系统的平行度,根据平行光管法,搭建了光轴平行度自校准实验平台,完成了系统平行度的高精度自校准。为准确标定光纤基线的长度,搭建了单脉冲多级反馈光程检测实验平台,实现了光纤光程的精确标定。本文还对系统的检测精度进行了分析。本论文的研究工作为系统的后续研制提供了有力支撑。更多还原

【Abstract】 Photo-electricity fire control system is a kind of generic terms, that using photo-electric sensor to control the shooting automatic weapons. It has been widely used in all kinds of weapon systems. To ensure the hit accuracy and the quick reaction capability of the fire control system, the concept of the accompanying security system was proposed in the 80 s in China. After thirty years of research, it has been fruitful. But, as the most important component of the fire control system, the appropriative accompanying security system of the laser range finder has not been completely exploited.Under the special requirement of the accompanying security system, this paper, using the optical alignment and the optical fiber delay line (VFDL) technology, designs a ranging accuracy testing system for the laser range finder. The system chooses multimode optical fiber as transmission system to meet technical requirements of the simulation optical path. A ’former convex type’ double-plate laser coupling lens is designed with large relative aperture. After comprehensively considering the working principle and structure of laser range finder, this paper designs an incident optical axis alignment system (IOAAS) and the corresponding software, using the pulse light capture technology by CCD. Combined with IOAAS, the output port, which is on the basis of parallel light pipe axis calibration technology, realizes the multi beam axes collimation of the laser range finder. Considering the damage threshold of the photosensitive parts, a kind of neutral density filters is used as the attenuation system. And this paper proves the feasibility of the scheme, after the experiments of VFDL and IOOAAS.In order to correct the system parallelism itself, an experiment of optical axis self-calibration is designed, and it gets a good result. To accurately demarcate the fiber length, this paper, using the method of MFQ by single pulse, makes several experiments, and verify the feasibility of the system. Finally, the detection precision of the system is analyzed. The research work of this paper provides a strong support for the subsequent development of system.更多还原