System development of an on-site BIM viewer based on the integration of markerless AR and BLE indoor positioning

• Main Authors: Sheng-Han Hu, 胡聖翰
• Other Authors: Hung-Ming Chen
• Format: Others
• Language: zh-TW
• Published: 2018
• Online Access: http://ndltd.ncl.edu.tw/handle/8ges3j

碩士 === 國立臺灣科技大學 === 營建工程系 === 106 === In the circumstance of on-site operations, a conventional way to use Building Information Model (BIM) for assisting these operations in indoor environment is using portable computer with BIM software to view the BIM in site. In this manner, manual navigation in virtual space is required for locating and accessing the corresponding model components of building elements encountered in site. In addition, the views of the real site and the virtual BIM are not synchronized and integrated. Using indoor positioning technology to provide automatic model navigation can improve the efficiency for these on-site operations. Further, applying Augmented Reality technology can combine virtual information on real scene to support these on-site operations more instantly and intuitively. Therefore, this study integrated Augmented Reality (AR) and indoor positioning technologies to develop an on-site BIM viewer. In the proposed viewer, BIM information is displayed and superimposed on real building elements in 3D models scences or surrounding texts using AR technology to provide instant feedback to the user. The system uses Bluetooth Low Energy (BLE) technology to establish an indoor positioning environment in a building for identifying the room which the user is currently located and loading the room’s BIM model, and then Markerless-Based Tracking technology based on computer vision is applied in the system to track the feature points of the environment and the building elements in the image of real scene. Based on the feature points, the system calculates the location and angle of the system camera in the BIM model which is corresponding to the field user's perspective and orients the system camera to obtain the virtual scene which is consistent with the field user’s perspective. The virtual can then be aligned and superimposed on the image of the real scene to achieve the goal of cyber-physical integration.