The text analyses some key problems of accurately machining of O circle mould cavity, including its technology, measurement, and machining error, and then puts forward a CAD example for it.
对O形圈模具型腔精确加工中的工艺、测量及加工偏差等几个关键问题进行了分析，并针对实例进行了计算机辅助设计。
An axis external circle simulates a reference shaft line to realize the principle of the measurement of the plane to the symmetrical characteristic of the reference axis.
以轴外圆模拟基准轴线实现面对基准轴对称度测量的原理。
The measurement system on chain board of tooth shape chain was established based on computer vision, and a new kind of sub-pixel algorithm for edge orientation of beeline and circle was put forward.
构建了基于计算机视觉的齿形链链板的测量系统，对直线和圆的边缘定位，提出了新的亚像素算法，计算了齿形链链板的销孔直径及圆度误差、链板节距和两直边夹角，对测量结果进行了误差分析。
In the field of ultra-precision measurement, tiny two-degree-of-freedom error information can be separated from moire fringe image generated by overlapping a pair of concentric-circle gratings.
在超精密测量领域中，通过处理同心圆光栅副迭合的莫尔条纹图像可以分离出二自由度的微小误差信息。
In the field of ultra-precision measurement, tiny two-degree-of-freedom error information can be separated from moire fringe image generated by overlapping a pair of concentric-circle gratings.
在超精密测量领域中，通过处理同心圆光栅副迭合的莫尔条纹图像可以分离出二自由度的微小误差信息。
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