【摘要】 获取叶片型面数据主要有接触式与非接触式两种方法,在非接触式等步长测量方法的基础上,提出一种叶片型面快速测量的新方法,并通过实验验证其测量效率和测量精度.在获取理论模型数据点的基础上,用改进的直线夹角法提取叶片截面曲线的特征点,将其与原数据进行比对,计算Hausdroff距离;在保证曲线拟合精度的前提下减少测点数目.搭建测量硬件系统,开发自动测量软件,实现获取叶片型面数据的非接触式等步长测量和按截面曲线特征点的快速测量.最后进行等步长式与快速测量式两组实验,对测量数据进行数据处理并对比测量误差,验证了快速测量方法的可行性.更多还原

【Abstract】 3D data from blade surfaces can be measured using contact or non-contact methods. A newfast measurement method was proposed based on the non-contact method of equidistance measurement. On the basis of the theoretical model data,feature points were extracted from the blade feature section curve with the improved method of straight angle and were compared with original data,thus the Hausdroff distance was calculated. On the premise of the fitting accuracy,the number of measurement points was reduced. A hardware system and software were developed to realize the non-contact equidistance measurement and feature point fast measurement. Finally,two sets of experiments for measuring complex blade were carried out. The results of data processing and error analyzing confirm the feasibility of fast measurement method.更多还原