边缘检测方法在线阵CCD大坝位移计中的应用

根据大坝变形监测的实际需求，采用先进的CCD以及FPGA技术，设计了用于大坝水平位移监测的高精度位移计．根据线阵CCD的特性，论述了利用平行光源进行测量的结构及原理．通过对CCD图像进行数字化，采用数字的高斯滤波及边缘检测算法对CCD图像进行像元级的边缘定位．在实验中运行了FPGA作为处理部件，采用VerilogHDL对处理算法进行逻辑设计，通过论证，系统具有很高的测量精度以及集成度．

Linear array CCD dam displacement meter based on edge detect method

According to the deformation monitoring of dam＇s actual needs, based on advanced CCD and FPGA technology, a displacement meter was designed with high precision and automatic measurement for dam use. On the basis of edge gradient step characteristic of a gray image, Gaussian filter and edge detection algorithm was used to find the pixel level boundary of a CCD image. Taking FPGA as the system processing core and the digital circuit hardware carrier, Verilog HDL language was used to design the system which is all included in a single FPGA. Simulation and test show that the sopc system had high precision, high processing speed, high integration density and high reliability.