Research On Optical Sensor Image Acquisition System For Space Rendezvous And Docking

At present, microwave radar technology, computer vision and laser technologyare mainly used in measuring of the target’s position and attitude. In recent years,the CCD/CMOS camera as an optical sensor in measuring system is a new trend. Inthis dissertation, for the "development of rendezvous and docking demonstrationprototype optical sensor for the third stage lunar exploitation" project’s requirement,an embedded real-time image acquisition and process system based on FPGA andDSP is designed.In this dissertation, the overall program is designed under the requirement. Theindustrial camera with Camera Link interface is used as the optical sensor. FPGA isused to control the camera for image acquisition and complete the data reception,data storage, real-time display and other operations. DSP is used for featureextraction and object space coordinates calculation.The Camera Link high-speed transmission interface, high speed data cache,image display, the connection of FPGA and DSP, DSP processor and power supply,clock, reset circuits are designed. And the circuit debugging is completed.The logic is designed in FPGA to complete the control of the camera; store theimage by the switch of double data buffer; adjust the image display resolution tomatch the resolution of the monitor; design the FPGA and DSP data sharinginterface of the memory to make DSP read the memory connected to the FPGAdirectly; DSP reads the data and completes the co-point target centroid localizationto support the experiment.The image is displayed correctly and that verify the correctness of imageacquisition circuit design; the experiment of the co-point target centroid localizationprove the stability; by calculating the time-consuming from data transmission tooutput of the result and then get the processing speed of the system.The whole system with small volume, light weight and low powerconsumption is used as a complete image acquisition and process system. It can bemore widely used in the general vision measurement.