| CCD sensors are widely used in the fields such as scientific research and astronomical observations for high sensitivity and the low readout noise,while sCMOS sensors eradicated the high noise and low quantum efficiency that have traditionally been associated with conventional CMOS image sensors,and because of its advantages such as low power consumption and high readout frame frequency,sCMOS presents the trend of replacing CCD sensor in most of the application fields.Many countries in the world have invested a lot of resources in the research of imaging system,because there is still a big gap between China and abroad in such area and the export restriction imposed on China,it is of great significance to develop the imaging system of independent intellectual property rights.Based on the above background,this paper complete the design and implementation of the imaging system by using GSENSE400 as the image acquisition device,taking Spartan-6 FPGA of Xilinx as the core controller,and using the USB3.0 interface to output the images.This paper mainly includes the following aspects:1.Proposing the overview scheme of imaging system.By analyzing the structure of the existing imaging system and comparing the types of devices needed in the imaging system,the system which uses GSENSE400 image sensor as the photosensitive element,takes Spartan-6 series FPGA of Xilinx as the control core,and outputs image by USB3.0 interface was proposed;2.Complete the hardware design of imaging system.The design and implementation of the two circuit boards of the Image Acquisition Board and the Imaging Control Board are completed,the design of the Image Acquisition Board mainly includes the design of the image sensor and its power supply circuit,and the design of the Imaging Control Board includes the FPGA and its configuration circuit,USB3.0 interface control circuit,and the basic rules of PCB design process are introduced;3.The design of FPGA control logic of imaging system and USB3.0 interface firmware program are completed.The design of FPGA control logic includes the design of Scmos sensor image acquisition time sequence,the correction of image data and the control of USB3.0 interface.Based on the FPGA logic,the acquisition and transmission of image is realized.4.The design of the imaging system has been tested,the test results show that the designed imaging system can work properly,and has high reliability and stability.At the same time,the design work is summarized and the future research work is prospected. |
