条码检测装置中CCD图像采集电路的设计

摘要

In order to implement liner array Data acquisition for Barcode and real-time detection and further processing for collected object data, this paper presents a design of image capture circuit based on FPGA chip, using top-down design with Verilog. The image data acquisition unit implements Barcode image data collection controlled by encoder and com-municates with host computer through UART. In the paper, CCD and AD chips’driving time sequence are realized with hardware description language. After platform debugging, it shows that a real-time image acquisition is achieved from image acquisition based on FPGA and it provides a guarantee for improving the detection speed and efficiency for barcode.%为了实现对条码的在线采集，对采集对象进行实时检测和进一步处理，基于FPGA芯片，利用Verilog语言采用自顶向下的设计方法对图像采集电路进行了设计。图像采集单元与上位机之间通过UART进行通信，通过编码器的控制实现对条码的图像采集。其中，使用硬件描述语言对于CCD和AD芯片驱动时序的实现方法进行了设计。经过平台调试，结果表明：基于FPGA的图像采集电路实现了图像的实时采集，为提高条码的检测速度和效率提供了保证。