线阵CMOS图像采集及编码传输的实现

Implementation of Linear CMOS Image Data Acquisition and Data Encode Compression

为实现雨滴、雾滴等大气粒子的非接触测量,基于线阵CMOS图像传感器实现了粒子测量系统。充分利用FPGA的资源丰富、接口灵活、并行计算等特点,结合USB芯片实现稳定可靠的高速数据采集和传输。为解决线阵图像传感器数据高速采集和实时传输处理问题,基于Xilinx公司Spantan系列XC3S200为核心实现了高速数据的采集和实时编码处理系统。该系统能够实时采集图像传感器原始数据,同时结合预先设置的阈值也可实时对数据进行阈值比较和编码。根据实际需求可选择输出原始数据或者编码数据,系统中分别设计了FIFO和双口RAM用于数据缓冲和比较模块,从而满足系统实时数据采集、传输及处理的需求。整套系统结构简洁、成本低廉,具有较广泛的应用前景。

In order to realize untouchable measurement of raindrops and fogdrops,particle measurement system which based on linear CMOS image sensor was designed.The system take advantage of rich resoures,flexible interface and parallel computing of FPGA chip,combined with a USB chip,a stable and reliable data collection system in high speed has been realized.High-speed data acquisition and data encoding in real-time based on Xilinx ＇ s FPGA XC3S200 is designed in the system.Original data of CMOS image sensor can be obtained,with the preset threshold,data comparing and encoding in real-time can be realized as well.Original data or encoding data can be transmitted according to requirement.Dual-ports RAM and FIFO are designed in this system for data buffer unit and data comparison unit,so it can meet the demand for high speed data collecting,transfer and processing.The structure of the system is simple,low cost and has wide application prospect.