基于非激光光源的无扫描3D成像光雷达系统的研究

发布时间：2018-01-05 21:08

本文关键词：基于非激光光源的无扫描3D成像光雷达系统的研究　出处：《电子科技大学》2014年硕士论文　论文类型：学位论文

【摘要】：无扫描3D成像光雷达有着探测视场大、成像速度快、探测距离远、分辨率高等优点,在军事、医疗、测绘等领域有着广泛的应用前景。现阶段的无扫描三维成像光雷达技术有着两类不同的实现方案,一类是利用三维成像传感器件直接获取目标的3D像,另一类是利用二维成像传感器件通过强度像与距离像合成的方法来获得目标的3D像。目前,绝大多数的三维成像光雷达方案选择后一种方案,而这些方案多采用调制激光作为发射光源或昂贵的ICCD等调制接收器件,这就导致系统的实现难度大、成本较高。本文通过对目标三维成像原理的研究,提出采用大功率LED代替激光作为发射光源,并利用高灵敏度线阵CCD器件的电子快门功能,实现一定距离上的低成本三维成像方案。最后根据该方案构建了一套以FPGA为控制核心,USB2.0为数据传输接口的实验演示平台,对一定范围内的目标进行了测距实验,验证了采用该种方法实现目标三维成像的可行性,本文主要工作内容如下:1.完成基于非激光光源的无扫描3D成像光雷达系统的整体设计方案,根据实验预期与实验室条件完成器件的选型。2.系统的硬件电路设计,主要包括系统电源部分、快门型线阵CCD器件TCD1304控制部分、模数转换器件AD80066的控制部分、USB传输接口模块以及FPGA控制模块。3.系统的软件设计,主要包括采用硬件描述语言VerilogHDL实现的快门型线阵CCD器件TCD1304的驱动控制部分、模数转换器件AD80066的配置与驱动部分、FPGA数据处理部分、USB控制传输部分以及采用VC++编写的USB上位机控制程序。
[Abstract]:Non-scanning 3D imaging lidar has the advantages of large detection field of view, high imaging speed, long detection range and high resolution in military and medical treatment. Mapping and other fields have a wide range of applications. At present, there are two kinds of different schemes in the non-scanning 3D imaging lidar technology, one is to use 3D imaging sensor device to directly obtain 3D image of the target. The other is to obtain the 3D image of the target by combining the intensity image with the range image by using the two-dimensional imaging sensor. At present, most of the 3D imaging lidar schemes choose the latter scheme. Most of these schemes use modulated laser as the emitting light source or expensive modulation receiver such as ICCD, which leads to the difficulty and high cost of the system. In this paper, the three-dimensional imaging principle of the target is studied. High power LED is used instead of laser as emitting light source, and the electronic shutter function of high sensitivity linear CCD device is used. Finally, a set of experimental demonstration platform using FPGA as the control core and USB2.0 as the data transmission interface is constructed according to the low cost 3D imaging scheme at a certain distance. A range of target ranging experiments are carried out to verify the feasibility of using this method to realize the three-dimensional imaging of the target. The main work of this paper is as follows: 1. The whole design scheme of non-scanning 3D imaging lidar system based on non-laser light source is completed. The hardware circuit design of the system includes the power supply part of the system and the TCD1304 control part of the shutter linear array CCD device. The control part of AD80066 and FPGA control module. 3. Software design of the system. It mainly includes the driving and controlling part of the shutter linear CCD device TCD1304 which is realized by the hardware description language VerilogHDL. The configuration and driving part of the analog-to-digital converter (AD80066) is composed of the data processing part and the control and transmission part of AD80066, and the USB PC control program written by VC.
【学位授予单位】：电子科技大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TN957.52

【参考文献】