【作者】 蒋鑫； 李华； 朱辉； 刘杰；

【Author】 JIANG Xin;LI Hua;ZHU Hui;LIU Jie;Xi’an Institute of Optics and Precision Mechanics, CAS;

【机构】 中科院西安光学精密机械研究所；

【摘要】 为了实现对核电蒸发器支撑板板孔几何参数的精密测量,建立了蒸发器支撑板板孔精密测量系统。系统以支撑板板孔为测量对象,对其几何参数进行测量。系统采用图像处理技术将待测目标转化为二维离散坐标点,计算其最小外接矩形并对轮廓进行预定位,然后将轮廓分割成相互重合的"扩展邻域轮廓",建立以曲率角为原则的边缘约束算法对各轮廓段精确定界,最后据此实现对轮廓参数的精密测量。通过实验和误差分析表明,系统的测量精度优于0.02mm,该系统测量精度高、测量速度快,对研究零件几何参数的精密测量有要重要的实际参考价值。更多还原

【Abstract】 In order to achieve high precision measurement of complex-profile parts, a parameter measurement method based on edge restriction condition is proposed. Firstly, two-dimensional discrete points can be obtained by image processing technology, and the profile can be pretreated by calculating the Minimum Enclosing Rectangle(MER) of the points. Then, the profile is divided into a series of "extended neighborhood profiles", and an edge restriction algorithm based on curvature angle is build for precision demarcation. Finally, the profile parameters of part are measured precisely. The experiment results and error analysis show that the measurement precision can reach 0.02 mm, so this method has significant reference value for precision measurement.更多还原