Research Of "One Driving N" CMOS Imager Synchronization Sensing System

In the application of binocular stereo vision, three dimensional imaging andmulti-object video supervisory, it’s very critical to acquire the images of the targetfrom multiple positions and various angles, and the multi-channel video imageprocessing technology is the only way to meet the requirement. In the traditionalmulti-channel video system, data is transferred through independence interfaces bymeans of multiple video channels independently transporting. However, it increasesthe difficulty for backward video processing system to capture video and transfer datasynchronously from different channels of video. Along with the widespreadapplications of video technology in portable stereo vision measuring instruments andmicro-miniature video equipment, the demand of microminiaturization in video imagesystem becomes increasingly high. As a consequence, it will be of great significanceto look for a video transmission technology, which enables to transfer multichannelvideo synchronously with a video interface only.Because of the various advantages of CMOS sensor, such as high integration,relatively low power consumption and high cost effectiveness, CMOS sensor has beenwidely applied in industrial field. An architecture and implement method of “onedriving N” CMOS sensor image synchronization sensing system is proposed in thispaper. The system acquires the images from N channels of CMOS sensorsynchronously, and then outputs them through a video interface. In order to illustratethe feasibility of this design, an implementation method of dual-CMOS sensor imagesynchronization sensing system is proposed in this paper. The system transfersdual-channel video image data via a VGA video interface. In addition, it can beswitched working as the single channel output mode and dual-channel synchronousoutput mode, with function of video freezing. This article details the workingprinciple of the system，and the design process of the system, which includes thedesign of system hardware structure and the building of CPLD digital logical system.For purpose of improving the real-time performance and the stability of the system,Ping-Pong operation technique is applied in the video streaming transmission andstorage. At last, results of the timing simulation and hardware debugging of thesystem show that the proposed system design functions stably and reliably and meets the need of miniaturization of system.