圆钢椭圆度的在线测量是通过同时测量圆钢横截面上四个不同方位的直径实现的。由于圆钢的轧制是在高温快速的条件下进行的,用接触法测量难以实现在线测量的要求。采用激光扫描测径法,较工业电视和图象传感器测径技术,精度要高一个数量级以上,且不受振动等干扰。在传统的激光测径技术中,是通过一个 Oval roundness is measured on-line by simultaneously measuring the diameters of four different orientations on the cross-section of the bar. Since the rolling of round bar is carried out under high temperature and rapid conditions, it is difficult to measure on-line measurement by the contact method. Using laser scanning caliper, compared with industrial TV and image sensor caliper technology, the accuracy is higher than an order of magnitude, and not subject to vibration and other interference. In the traditional laser caliper technology, is through one