Development Of Remote Optical Fiber Transmission And High Speed Ethernet Communication For Digital Imaging System

With the development of digital image acquisition and transmission technology,high speed imaging system will be more and more widely used in scientific research,transportation,aerospace and other fields.However the large amout of data of digital image collecting and real-time transmission will consume a lot of processing and transmission bandwidth.Therefore,research on key technologies of high speed imaging system become more and more important.In this thesis,the Xilinx Kintex7 FPGA are used as the main control chip for high-speed imaging systems in the long-distance high-speed data transmission,large-capacity storage,data backup and high-performance communication with the host computer.Digital image data transmission and communication hardware are developed,and Verilog hardware description language is used for coding and debugging in Vivado software platform.The goal is to solve the challenge of long-distance communication,high-efficiency transmission and communication bottlenecks in high-speed imaging systems and realize the pivotal role of digital image data transmission.The main work of this thesis includes the following points:First,the overall architecture of the classic imaging system is analyzed and categorized,and the imaging system design and function realization are summarized.Based on the application scenario requirements of the design,the appropriate master control chip and related module designs are selected.Relevant module design requires key technology research,estimation of difficulty of implementation,and determination of the design of transmission and communication solutions for the back end of the image system.The function of this design is to use the 10 Gbps SFP+ optical module to receive the image data collected from the front-end digital image sensor and buffer it to the local area,use etherent protocol realize communication to the PC host,and then store the data in the SD card to ensure that the data is not lost when the power is off.Second,this system is based on the Xilinx Kintex-7 series as the main control chip.Through the analysis and research on the key links of the communication system,combined with new communication technologies,and with reference to the advanced imaging system design concept,the selection of various functional modules in the system are determined based on the design experience of the previous generation product.Meanwhile,the design of SFP+ fiber interface module,DDR3 SDRAM cache module,SD card module,and host computer network protocol communication module are completed.Third,for optical fiber transmission theory,DDR3 SDRAM high-speed storage principle,SD card storage principle,and gigabit ethernet communication protocol are described in detail and verified.Verilog hardware description language is used to implement logic design and implementation on the basic theory and basic principle of each module.System joint debugging is performed under the condition that the functions of each module are verified.This design uses a high-performance FPGA programmable chip,using DDR3 SDRAM as cache,SD card as backup,SFP+ optical transmission interface,and gigabit ethernet protocol transmission,making the transmission performance of high-speed imaging systems further improved.The introduction of SFP+ optical modules in the system can provide remote high-speed transmission,which is convenience for some researchers to enter special application scenes.This thesis will elaborate the scheme of high-speed imaging transmission system in order to better express the working mechanism and principle of the system.Performance testing on the overall and each module are carried out,and the test results are presented in chapters.