【摘要】 针对长轴直线度检测需要直线和角度基准问题,本文提出采用十字线激光束的长轴直线度检测方法。根据被测长轴轴心到两激光平面的距离唯一的原理,用图像处理技术对十字线激光图像进行处理,求出十字线激光图像的交点坐标和水平线倾角,结合距离信息计算被测长轴的直线度参数。讨论了检测系统的结构,详细介绍了直线度参数的计算方法。采用640pixel×480pixel摄像机(光靶分辨率为0.0973mm/pixel),在1m、9m和18m处分别摄取50幅图像,测量结果的极径标准偏差分别为0.00937mm、0.0342mm和0.0860mm,极角标准偏差分别为0.843′、1.26′和1.57′。更多还原

【Abstract】 Since a straightness inspection system for long shaft needs line and angle datum,a method of straightness inspection using cross laser for long shaft is proposed in this paper. Based on the principle that the distance from the axle centre of inspected long shaft to the two laser planes is unique,the image processing is used in the method to get the coordinate of the cross point and the angle of the horizontal line of the laser image and calculate the straightness parameters with distance information. The structure of inspection system is discussed. The calculation method for parameters of straightness is explained in detail. With a camera (640pixel×480pixel and 0.0973mm/pixel as resolution of target),50 samples are taken at each distance of 1m,9m and 18m. The standard deviation is 0.00937mm,0.0342mm and 0.0860mm for polar radius,0.843′,1.26′ and 1.57′ for angle,respectively. Experimental results show that the straightness inspection system for long shaft using the method is simple in structure,easy in operation and precise in inspection.更多还原