采用三维点云数据采集和建模技术对球形储罐容量计量进行了研究,主要包括球形储罐罐壁坐标采集原理、数据噪声滤波、粗差剔除、半径拟合和容量计算方法研究,并进行了试验数据分析。1000m³球形罐试验数据表明:在赤道内半径测量方面,全站仪方法和三维激光扫描方法的测量的差值小于1mm;在竖向内半径测量方面,用全站仪测量方法和三维激光扫描方法的测量值之间的差值为16.1mm。三维激光扫描方法用于试验中球形罐容量测量的相对扩展不确定度为0.4% (k=2)。

The method of sample and analysis for three dimension data cloud was discussed, and the main content included data sample principle, noise reduction, gross error identification, radius fitting and volume calculation. One preliminary experiment was done to test this method. The experimental result of one 1000m3 sphere tank showed that there was consistency between total station method and data cloud analysis method for the measurement on the level diameter of spherical tank with one difference 1mm, but for vertical diameter one big difference 16.1mm occurred between the data from two methods. The measurement uncertainty of laser scanning method used for tested the sphere tank volume calibration is 0.4% (k=2)。