Design Of Multifunctional Image Acquisition And Storage System Based On FPGA

With the rapid development of machine vision,the application scenarios of image acquisition and storage devices are becoming more and more complex,and various fields have put forward higher requirements for the overall performance of the system.The current popular image acquisition equipment generally has the disadvantages of high hardware cost,single function,poor scalability,and large system composition.Because of the above problems,this article developed a set of image acquisition and storage equipment that integrates image acquisition,compression,storage,and transmission functions.The equipment has low hardware cost,reliable portability,and rich communication interfaces,and can be applied to experimental environments such as industrial production,military defense and security monitoring.The main contents of this article are as follows:(1)Combining the development status of image acquisition systems at home and abroad,analyze the characteristics of the existing system architecture,and propose the overall design scheme of the system in this paper.According to the functional requirements and technical indicators of the subject,the system is decomposed into multiple functionally independent modules.Among them,FPGA is the central controller,and the functional design of multiple modules such as image acquisition,video streaming,and data storage has been completed.Using the dedicated image processing chip of Huawei Hi Silicon as the core computing unit,the functional design of the video stream compression processing module is completed.(2)After clearing the overall system design plan,a detailed analysis of the equipment’s overall workflow and key technical points such as image acquisition,storage,and compression are made.And according to the functional characteristics of each module,select the corresponding core device,so as to complete the communication interface design of Cameralink Full,HDMI,Gigabit Ethernet and so on.(3)Analyze the power solution and data stream processing characteristics of each module of the system,and complete the module schematic diagram and circuit board layout and wiring design around the relevant core devices.The equipment adopts the stacked design structure of the core board and bottom board,which makes the system compact and easy to expand the system function.(4)According to the flow of image data,complete the logical function design of each module of the system.Among them,the interface logic control of the cache array is achieved through the DDR3 IP core,which solves the problem of data transmission bandwidth mismatch between modules.Besides,by establishing Gigabit Ethernet,SFP optical communication,and other interface transmission logic,the applicability of the device is enhanced.(5)Formulate a complete system test plan.First,verify the function of the essential components of the system,then carry out image acquisition and storage test on the whole machine,and summarize the relevant experimental data;finally,the system function test was completed effectively.Based on the unique modular design architecture,the device developed in this paper expands a variety of data transmission interfaces.It can capture 1920×1080,4096×3072 and other resolution video streams,and the use of two memory arrays for image data storage,make the total storage bandwidth of the system not less than 1GB/s,and the total storage capacity can reach 2T bytes.The equipment can be used in many fields such as machine vision,intelligent industry,military technology,etc,and has important engineering practice significance.