Development Of High-speed Acquisition And Storage Equipment With Large Capacity

With the rapid development of industrial cameras and the gradual increase of camera interface speed,it brings great challenges to the indicators and functions of image acquisition and storage equipment.At present,acquisition and storage equipment show the trend of clearer image,higher speed,longer time and smaller size.When industrial camera is collecting the high resolution image,the image data that it captured will be very large.If the transmission speed of the acquisition interface or storage interface of the equipment is limited,it is necessary to use the method of dropping frame or drawing frame to process the image,but those method will reduce the accuracy of the image data.At the same time,in the process of high-precision image data acquisition and storage for a long time,because the data of each frame is large and the acquisition time is long,the storage speed and storage capacity required are also huge.In order to solve these problems,it has significance to develop a large-capacity high-speed acquisition and storage equipment.The main work of this paper is as follows:(1)By comparison and analysis of existing frameworks,the use of one more powerful hardware system based on ZYNQ in a variety of frameworks is proposed.According to technical specifications and functional requirements of system,the overall design of hardware and software is completed.By using the modular design,the hardware module and the structure design are divided reasonably,the equipment reliability is improved and the equipment volume is reduced on the basis of shortening the development cycle.(2)According to the overall hardware scheme,the main control module based on ZYNQ,Camera link Full80 interface module,high-speed storage module,image upload module and the ZYNQ configuration module are designed.And according to the functions of each module,the logic implementation is realized.In the implementation process,the problem that storage speed of one Micro SD card is not fast enough is solved by using multiple cache blocks and storage arrays for cyclic storage.Complete the logic function of the AXI interface to solve the communication problem between the PS side and the PL side.(3)Aiming at the high and wide image data collected by the device,a more reasonable way of image data stream splicing and storage is designed,and the time information of image data stacking is realized in the process of image data storage,so that index management and export of storage data can be easily stored.At the same time,the image upload function was completed and a corresponding set of PC software was designed for image data export and camera configuration.(4)The debugging scheme was proposed for the equipment,and the actual parameters were tested.,and the image data storage process was also verified.Finally the overall debugging of the equipment was completed.This thesis finally developed a large-capacity high-speed acquisition and storage equipment with a total capacity of 1T,a maximum acquisition speed of 632 MB/s and a maximum storage speed of 695.2MB/s..At the same time,we can get better performance by changing the larger capacity of Micro SD card and expanding the storage array.The equipment has the advantages of large capacity,fast acquisition and storage speed,low cost and high scalability,and it can be applied to various exploration fields.