涡轮叶片孔距测量系统设计

根据涡轮叶片上圆孔的特点，介绍一种快速检测涡轮叶片上圆孔距离的方案，该方案
将采集的数字图像输入到计算机，根据事先给定的涡轮叶片上圆孔的模型，对图像进行匹配，然后对匹配区域进行二值化，经形态学处理，去除图像上小的噪声点，再检测出图像上的圆孔的大体位置，基于最小二乘原理确定圆孔的精确位置，由此得到圆孔间的距离和尺寸。此方法具有精确度高、速度快、抗干扰强的优点。
关键词：最小二乘法；圆拟合；形态学处理；相关匹配
Abstract：In terms of characteristic of apertures on turbine vane, A fast detect method which is used to measure the distance of apertures on turbine vane is introduced, First digital image is captured and input into computer, then based on model of the apertures on turbine vane which is known before, match the object area. After that for object area, finish the following steps: image segmentation, morphologic process, which is used to get ride of small wrong pixels, detecting the approximate situation of circular holes, which is based on least square method to detect the precise central coordinate of apertures. Then you can get the distance of the apertures and their sizes. This method has advantages of higher precision and rapid speed, as well as strong anti-jamming.
Key Words : least square method； circle fitting； morphologic process； relation match