Design Of High-speed Image Acquisition And Large-capacity Data Storage System

In recent years, Unmanned Aerial Vehicle(UAV) aerial develops very rapidly. It fast dominates the aerial areas because of its better flexibility and mobility. Meanwhiles, the imaging detectors used in aerial tends to be in high resolution and high frame rate, which puts forward higher requirements to the design of high-speed image acquisition and large-capacity data storage system. Due to the particularity of UAV flight environment, such a system must meet the requirements of small size, light weight, high bandwidth, large capacity and good stability, which for sure, will increase the difficulty of development.The subject comes from the actual project, it needed to design an electronic system based on a CMOS camera developed by Photonfocus, which could record the aerial data collected by CMOS camera and other flights, coordinate information to meet four hours of aerial records. In this paper, an electronic system was designed, which was constituted by power supply system, capture board and memory board group. By using the stacked connecting structure, the system met the size requirements, and the memory system architecture of FPGA and NAND FLASH met the the bandwidth and capacity requirements.Firstly, by considering the project needs, the particularities of the application environment and design of the electronic system was analyzed, while the framework of the electronic system, the core device selections and each part of the circuit designs were introduced. Secondly, the external and internal interfaces and communication protocol were determined, on which basis the softwares for capture board and memory board were realized.Finally, the project needs of 144MByte/s bandwidth and 1.98 TByte capacity were met after discrete and cascading validations. In addition the system could reach 400MByte/s bandwidth, and the storage capacity could increase in the size of 320 GB under enough power supply.