Design And Research Of Driving Circuit Of High Speed Camera Based On CMOS Image Sensor

With the improvement of the manufacturing level and integrated circuit designtechnical level, the CMOS image sensors achieve rapid development. CMOS imagesensors have many advantages, such as high integration, flexible control, low power,low cost and so on. In terms of high speed, CMOS is much better than CCD. In thefield of high-speed digital imaging, CMOS image sensors occupy an increasinglyimportant position. The high-speed camera based on CMOS image sensor can catchmore than1000frames of pictures in1second, which is convenient for the study oftransient phenomena. The high-speed camera has been an important tool in manyfields such as scientific research, military and industry.This paper is about a high-speed, small-size, low-power camera system basedon CMOS image sensor LUPA1300-2. The main works of this paper are as follows:(1) The development, work mechanism, and key technologies of CMOS imagesensor are introduced. The advantages and prospects of CMOS image sensor appliedto high-speed camera is analyzed. And its performances are compared with CCD;(2) The design requirements of the camera are analyzed, and logic device,processing chip, transmission chip and LDO are chosen to build the hardware system.The function and characteristic of each chip is introduced.(3) FPGA is chosen to be the core of timing control. The driving,communicating and data processing program is described in Verilog HDL. Theprinciple of every part is described in detail.(4) The hardware platform of this imaging system is built, and the circuit designof each module is described. PCB design, debug, test is completed based on theanalysis of the high-speed circuit design principle. Experiments show that, thesystem works stably, and the images have good effects.(5) Multiple slope integration is described in details. The impact of multipleslope reset to image is researched. Optimization experiments are conducted.Experiments show that, multiple slope integration can improve the dynamic rangeand the optimization strategy for the single image is proposed.(6) Experience and suggestions are listed, which are useful for the futuredesign.