燃料组件管座非接触式精密测量方法

Non-Contact Precision Measurement Method for Fuel-Assembly Header

根据燃料组件管座定位销孔的几何特性及其相对位置特性,结合视觉测量的特点,提出燃料组件管座非接触式精密测量方法。该方法采用光学相机获取销孔边缘图像,以边缘点的坐标值为基础,通过误差点剔除、圆弧拟合等算法实现管座定位销孔的直径及相对位置自动检测。该方法检测精度高达5μm,可以避免接触式测量引起的组件管座损伤和减少人为操作引起的测量误差。

Based on the analysis of geometric characteristics and location characteristics of the positioning pin holes of the fuel-assembly header,and combined with the visual measurement characteristics of the fuel-assembly header,non-contact precision measurement method can be proposed.The method uses an optical camera to capture the edge image of positioning pin holes.Then the error points of the edge points are removed,and the diameters and their relative position of the pin holes by coordinate values arc fitting of the edge points can be obtained.The detection accuracy of the method is up to 5μm,and in this way can reduce the human measurement error and avoid damage ferrule caused by the contact measurement.Actual operation results show the higher detection accuracy and stability of this method.