Digital Support for Bridge Inspectors through Mixed Reality BIM Data Visualizations

We describe an interactive augmented and virtual reality (AR/VR) system that supports bridge inspectors during in-office preparation, on-site inspection, and follow-up work back in the office using building information modeling (BIM) data. Originating from the process steps required to perform a digitally supported bridge inspection, we focus on our prototypes' implementation, a combination of VR and AR methods in a prototypical development. Our goal is thus to present one possible realization of these processes on a technological level. Therefore, the collaborative aspect between on-site inspection and in-office preparation and debriefing plays an important role. Several issues of data synchronization and communication techniques need consideration and proper integration into the entire system. It is essential to consider the bridge inspectors' needs, requirements, and working environment to avoid losing track of the target group of such an application. Low initial hurdles and user-friendliness require seamless integration of different tools and additional resources. For that reason, we aim to link engineering tools and game engine environments in an operationally and reliable application. We believe that our application may serve as a starting point for further discussions on user-friendly digital support and broader usage of innovative technologies bearing in mind the evolution and tradition of structural inspections.