基于FPGA的CCD光轴检测系统研究与实验

摘要

Field programmable gate array (FPGA) is used to realize real-time drive and image processing of CCD sen-sor is essential,for high speed and real time optical axis testing in space laser communication. The paper investigates a method to drive CCD sensor and test optical axis by FPGA in detail from engineering application, analyzes model and characteristics of CCD sensor,the representative of array imaging sensors. Finally,an instance of designing、experiment method、a test platform are given and analyzed. Adopting FPGA direct drive CCD sensor and image processing is fea-sible by experiments. Its ability of signal processing, processes data streams at minimum 100mb/s, can meet the de-mands of high speed servo control system completely. The bandwidth of control system has reached 2.5Hz.%为了在空间激光通信中实现高速实时的光轴检测，采用FPGA （可编程逻辑门阵列）实现对CCD传感器的实时驱动与处理是十分有必要的。从工程角度出发，研究采用FPGA完成CCD传感器的驱动与光轴检测方法，并分析了以CCD为代表的阵列传感器在光轴检测中的模型与特点；最后给出一个光轴检测系统的设计实例、试验方法与测试平台。通过实验验证了采用FPGA直接实现CCD驱动以及图像处理具有可行性，并且可以实时处理百兆数据，完全有能力满足高速伺服控制系统的需求，其总体控制带宽可达到2.5Hz。