Precision Analysis for Laser Scanner to Structure Monitoring

• Main Authors: Yu-Wen Chen, 陳煜文
• Other Authors: Che-Hao Chang
• Published: 2015
• Online Access: http://ndltd.ncl.edu.tw/handle/984w9n

碩士 === 國立臺北科技大學 === 土木與防災研究所 === 103 === As an island which located on the junction of plates, Taiwan usually suffers from typhoons and earthquakes. Often, the external force will cause invisible threats to the structure. As time goes by, these potential factors will result in damages. Structure refers to such as factories, buildings, bridges, towers and other metal-material buildings etc. In Taiwan, many structures are affected by natural disasters and result in damages. These can lead to losses of the society. Thus, monitoring the stability of structures becomes important. In general, structural monitoring is through structure analysis with the original structure design. The place to install the monitoring sensor will be evaluated after the determination of professional engineers. Afterward, It will be evaluated whether it is stable or not by the monitoring data. However, it can not monitor the entire structure. In this research, the laser scanner is adopted as the wholeness and high accuracy are taken into account. It can achieve high accuracy of distance measurement, scan the entire target, and record the three dimensional coordinates. Several experiments were added during the monitoring in this research to test whether the accuracy of laser scanner on scanning structure can detect the variation of the structure. In the results of indoor and outdoor experiments, the node displacement was detected in the point cloud data. The amount of the displacement is similar with other monitoring instruments and proved the benefits of laser scanner on structural monitoring. If the monitoring can compare with structure finite element method, the appropriateness of laser scanner on structural monitoring will be more definitely approved.