基于CMOS摄像头与FPGA的位置检测系统设计

Design of Position Detection System Based on CMOS Camera and FPGA

提出采用CMOS数字摄像头采集并提取黑色胶条位置来控制冷却转鼓速度的方法。系统以FPGA作为核心控制器,采用两片SRAM进行乒乓操作,FPGA根据CMOS摄像头输出的同步信号,将采集到的图像信息存储到一片SRAM中,同时读取另一片SRAM中的图像数据并进行图像处理,黑色胶条位置检测采用简单的灰度阈值二值化方法。给出了部分采集图像及仿真结果。采集图像显示,CMOS摄像头成像质量满足工程要求。仿真结果表明,系统实现了SRAM的乒乓操作,并完成了黑色胶条位置检测。系统与冷却鼓连接,实际运行可靠。

The method of controlling the speed of cooling wheel with the position of the adhesive tape is proposed. The position of the adhesive tape is gained with the CMOS digital camera. Based on the core of FPGA, two pieces of SRAM are used in the system to achieve ping-pong operation . According to the synchronous signal produced by CMOS camera, the image is sampled and stored into one of the two SRAMs by FPGA. At the same time, the image data stored in the other SRAM is read out and processed. To detect the position of the adhesive tape, the method of grey is used. One sampled image and the simulation result are given. The sampled image shows that the image quality of the CMOS camera satisfy the need of the project. The simulation result shows that the SRAM ping-pong operation is realized and the position detection of the adhesive tape is completed. The system is connected with the cooling wheel speed control system and works reliably.