【摘要】 水电站厂房内设备传统变形监测采用点测量方式,无法反映整体变形特征,而全站扫描仪可快速采集目标表面点云,通过点云处理得到形变量。基于全站扫描仪提出了真配对点的形变计算方法,根据后方交会法设计方案,采集两期点云数据,然后基于真配对点计算形变量并通过点面优化算法减少误差,最后验证了形变计算方法的精度。设计了两个模拟试验验证算法的可行性,通过细绳模拟输电线路弧垂变形和箱体外加锥体模拟壳体鼓包变形,在试验对象上施加外力使其产生形变,并精确测量形变量作为形变参考值。试验结果表明:两个模拟试验的形变计算误差分别为0.146 mm和0.056 mm,精度可达亚毫米级。该形变计算方法能够较好地应用于设施设备变形监测领域。更多还原

【Abstract】 The traditional deformation monitoring of equipment in hydropower plants uses point measurement,which cannot reflect the overall deformation characteristics. However,the total station scanner can quickly collect the target surface point cloud,and obtain the shape variable through point cloud processing. Based on the total station scanner,the deformation calculation method of the true paired point was proposed. According to the design plan of the rear intersection method,the two-phase point cloud data was collected,and then the deformation was calculated based on the true paired point and the error was reduced by the point and surface optimization algorithm,which has verified the accuracy of the deformation calculation method. Two simulation experiments were designed to verify the feasibility of the algorithm. The sag deformation of the transmission line and the bulging deformation of the case were simulated by adding a cone outside the box. The external force was applied to the test object to produce deformation,and the deformation was accurately measured as a reference value for deformation. The test results showed that the deformation calculation errors of the two simulation tests were 0.146 mm and 0.056 mm,respectively,and the accuracy can reach sub-millimeter level. Therefore,the deformation calculation method can be better applied to the field of facility equipment deformation monitoring.更多还原