在尺寸测量中,准确度、重复性、分辨率及速度表征着任何一种技术的效用。目前,外径测量的发展趋势已朝向百分之百的零件检验和更快速的信息反馈。这种趋势使同时改善上述四个参数成为必要。传统的接触式外径测量方法在速度适中且方法准确度要求不高的应用场合有一席之地。在预定开支少的情况下能解决许多外径测量问 In size measurement, accuracy, repeatability, resolution and speed characterize the utility of any one technique. At present, the trend of OD measurement has been towards 100% inspection of parts and faster information feedback. This trend necessitated the simultaneous improvement of the above four parameters. Conventional contact OD measurements have a place in applications where speed is moderate and method accuracy is not critical. Many problems with outside diameter measurement can be solved without a small budget