多CCD摄像机同步图像采集系统研究

发布时间：2018-03-08 03:11

本文选题：多路图像采集　切入点：FPGA　出处：《哈尔滨理工大学》2015年硕士论文　论文类型：学位论文

【摘要】：本文是基于我国“数字海洋”，研制数字化海面采集与生成系统中图像采集同步部分的模拟试验。该部分是通过实时记录海面几何波形的变化，对采集的图像进行算法处理，将实时海面波形图像变换为具有对应几何精度的立体高度图，获取模拟海面的数字化波形。由于现场待测海波池区域面积很大，一台CCD摄像机的测量范围不能覆盖整个测量区域，不能满足测量的需求。因此，需要采用多台CCD摄像机分区域测量与数据融合的方式进行现场大范围海浪浪高的在线测量，即使用多台CCD摄像机从空间不同的位置测量整个区域。通过在海波池沿线等间隔布置四对测站，每对测站负责所覆盖海波区域的浪高实时数据采集及测量工作。由于四对测站测量的是在同一激光参考平面上调制的同一海波波形，只是测量区域不同，可以对四组浪高测量信息进行数据融合与归一化处理。为了实现多CCD摄像机对海波池区域的图像采集，本文设计了多CCD摄像机同步图像采集系统。系统以Camera Link接口的CCD摄像机为图像采集装置，现场可编程逻辑器件FPGA为控制核心实现了对海波池图像的采集与显示。系统通过Camera Link接口将CCD采集的图像数据送入FPGA数据缓存模块，数据缓存模块再通过PCI接口将采集到的数据送到计算机内，完成整个图像的采集。系统的硬件设计主要包括功能芯片的选型、FPGA与CCD摄相机的接口设计、多CCD摄相机同步控制电路的设计、图像采集和预处理模块的设计、FPGA与PCI总线接口的设计以及电源模块设计等。在程序设计中，采用verilog HDL硬件描述语言实现对多CCD摄相机的同步触发逻辑，CameraLink接口逻辑、SDRAM图像缓存控制逻辑以及PCI接口逻辑等逻辑单元的设计。最后，设计完成了原理图及PCB板的设计。通过对系统的仿真及测试，表明系统满足设计功能，基本完成了设计要求。
[Abstract]:This paper is based on our country's "digital ocean", develops the digital sea surface acquisition and generation system image acquisition synchronization part of the simulation test, this part of the real-time recording of the sea surface geometric waveform changes, the image acquisition algorithm processing, The real-time sea surface waveform image is transformed into a stereo height map with corresponding geometric accuracy, and the digital waveform of simulated sea surface is obtained. Because the area of sea wave pool is very large, a CCD camera can not cover the whole measurement area, so it can not meet the needs of measurement. It is necessary to use multiple CCD cameras to measure the ocean wave height in a large area by using the method of area measurement and data fusion. Even though multiple CCD cameras are used to measure the entire area from different locations in space, four pairs of stations are arranged at equal intervals along the sea wave pool, Each station is responsible for the real-time data acquisition and measurement of wave height in the area covered by sea waves. Because four pairs of stations measure the same wave waves modulated on the same laser reference plane, but the measuring regions are different. Four groups of wave height measurement information can be fused and normalized. In order to realize the image acquisition of sea wave pool with multiple CCD cameras, a synchronous image acquisition system for multiple CCD cameras is designed in this paper. The system uses the CCD camera of Camera Link interface as the image acquisition device. The field programmable logic device (FPGA) is used as the control core to realize the image acquisition and display of the sea wave pool. The system sends the image data collected by CCD into the FPGA data cache module through the Camera Link interface. The data cache module sends the collected data to the computer through the PCI interface to complete the whole image acquisition. The hardware design of the system mainly includes the interface design between FPGA and CCD camera and the synchronous control circuit of multi-#en1# camera. The design of image acquisition and preprocessing module, the interface between FPGA and PCI bus, the design of power supply module, etc. Verilog HDL hardware description language is used to realize the design of synchronous trigger logic for multiple CCD cameras, camera link interface logic, image buffer control logic and PCI interface logic. Finally, the schematic diagram and PCB board are designed. Through the simulation and test of the system, it shows that the system meets the design function and basically completes the design requirements.
【学位授予单位】：哈尔滨理工大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：P715;TP274.2

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