Development Of Imaging Control And Transmission System For High Speed CMOS Image Sensor

The high speed imaging system can record the transient process of the target in real time accurately and reproduce the transient process in the form of slow release.For example,in the field of Aeronautics and Astronautics,the capture of high speed motion trajectory,the analysis of vehicle collision,the analysis of explosion mechanics,etc..The United States and other western developed countries in the field started earlier,with advanced imaging control and transmission technology,has developed a wide range of applications in the field of imaging systems.China is actively carrying out relevant research and application,but because of the restrictions on imports of advanced technology from western countries,the research level is lagging behind.Therefore,it is of great significance and practical value to develop a high speed imaging control and transmission system.This paper focuses on the two aspects of high speed imaging control high speed imaging and transmission system and high speed data transmission,introduces the characteristics and performance of the basic principle of CMOS image sensor and LUX13 HS image sensor chip,introduces related technologies of optical fiber communication,combined with high speed and large capacity storage technology,developed a high speed imaging and control transmission system.The main work of this paper is as follows:(1)The system architecture of high speed CMOS imaging and transmission system is designed.Through the analysis of the current mainstream imaging system architecture,combined with the performance of the system parameters,the final selection of the front-end image data acquisition and transmission,back-end storage system architecture.In addition,selected core components required in the system,the control core uses Kintex-7 series FPGA,photosensitive element uses LUX13 HS image sensor chip,real-time data transmission interface selects SFP+ optical module,the image data is stored by DDR3 SDRAM.(2)The hardware platform of high speed imaging and transmission system is built.Based on the CMOS image sensor LUX13 HS independently designed the image acquisition circuit,according to the basic specifications and design principles of high-speed circuit,completed the PCB design,debugging and testing.It is verified that the system has stable and reliable hardware platform.(3)Using Verilog hardware description language to design the logic of each module in the system.Write programs based on top-down thinking,The logic control timing of the CMOS image sensor register and bias voltage configuration is completed;Driving control timing of CMOS image sensor;Control timing of SFP+ optical fiber communication module;DDR3 SDRAM read and write control timing.The system is based on CMOS image sensor LUX13 HS chip development,frame rate could up to 4000 fps in the resolution of 1280 V × 720H(720P),meet the high speed HD standard.At the same time,the LUX13 HS chip supports open window mode,through the host computer configuration of the smaller the window,you can get the higher frame rate,to meet the needs of some of the scenes higher frame rate requirements,flexible and convenient.In addition,the system can realize real-time data transmission and remote control through the introduction of SFP+ optical fiber module,which provides convenience for some special applications which can not enter the scene.