卧式能源储罐容量计量中三维激光扫描方法的研究

提出了一种基于三维激光扫描原理的卧式罐容量全自动测量方法。讨论了一种卧式罐扫描点云数据分析算法,通过三角叠加原理计算出卧式罐等水平高度截面面积,在此基础上计算出不同液位高度对应的卧式罐容积值。设计了对比试验系统,以容量比较法为参考依据,三维激光扫描方法测得的容量值相对偏差明显小于几何测量法测量值,满足不确定度为0.4% (k=2)的计量要求,验证了这种方法的有效性,而且三维扫描方法可以有效提高卧式罐容量检定工作效率。

Study on 3D Laser Scanning Method for Horizontal Tank Volume Measurement

Based on 3D laser scanning principle, one automated measuring method used for horizontal tank volume measurement was proposed, which was compatible with the technical regulations of OIML R80, API STD2551 and JJG 266-1996. Point cloud of the tank scanned data was analyzed, and one area computation algorithm for section with equal liquid lever was introduced based on triangle superimposition method, then the tank volume below this liquid lever was calculated. The comparison experimental system was designed, and the measurement result from the volumetric method was regarded as reference. The measuring relative error of 3D laser scanning method was less than that of geometric measuring method, and meet the metrology uncertainty requirement of 0.4% (k=2), which verified the measuring method discussed. On the other hand, the calibration efficiency for the horizontal tank would be improved significantly by this 3D laser scanning method.