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现有的单点式挠度测量需要安装目标点,由于点数少,难以全面给出大型物体的变形。地面三维激光扫描技术采用了无接触式的测量方式,可以在短时间内获取物体表面高精度和高密度的三维坐标。将该技术应用到桥塔挠度监测方面,针对桥塔特点,提取桥塔棱线处的点云,通过去噪、拟合等处理方法,获取在不同荷载情况下整体桥塔的挠度变化,并进行对比分析。试验证明了该方法在桥塔挠度测量中的可行性。
Existing single-point deflection measurement needs to install the target point, due to the small number of points, it is difficult to give a full large-scale deformation of objects. Surface 3D laser scanning technology uses a non-contact measurement method, you can get in the short time the object surface high-precision and high-density three-dimensional coordinates. The technology is applied to the monitoring of the deflection of the bridge tower. According to the characteristics of the bridge tower, the point cloud at the ridge of the bridge tower is extracted. Through the methods of denoising and fitting, the deflection of the whole tower under different loads is obtained. For comparative analysis. The test proves the feasibility of the method in measuring the deflection of the bridge tower.