基于FPGA的自准直系统数据处理技术

Research on data processing technology based on FPGA for auto collimating system

提出一种基于现场可编程门阵列(FPGA)的CCD自准直测角系统。以FPGA作为系统处理核心;以自适应调节模块为CCD驱动发生器提供准确的波形时序;采用边缘检测算法获得图像的像元级边界;通过最小二乘拟合算法计算得到光斑圆心位置;利用VHDL语言以及MAX+plus II软件完成了系统设计。系统测试和实验表明:所设计的片上系统具有高精度、高集成度的特点。

A CCD auto collimation angle measuring system based on field programmable gate array （FPGA） is proposed. In this system, FPGA is used as processor core of system ; using self-adaptive module to provide accurate wavefnrm timing for CCD driving generator; edge detection algorithm is utilized to obtain pixel level edge of image ; by using the least square fitting algorithm,circle centre position of facula is calculated;system design is completed with VHDL and MAX ＋ plusII software. System testing and experiment prove that the system has characteristics of high precision and high integration.