AR-HUD system for tower crane on construction field

Recently, safety problem of construction field is becoming more serious as construction environment is getting more complex. For example, construction field can cause accidents due to many heavy materials and equipments on the field. Tower crane is the one of the heavy equipments for moving heavy materials on construction field. Tower crane driver should be able to identify all materials on ground while sitting on top of the crane which can be around 100 meters high. Especially for the invisible/hided objects and small materials, the driver needs help from individuals on the ground to get information on those materials, which often provided with hand gestures or mere shoutings. Unfortunately, those communication methods are not well recognizable in realtime on the exact position of events from the driver due to long distance and small size of gestures. In this work, we suggest an augmented reality based guidance system for tower crane. We supply visualized information to tower crane driver for important events and materials on the site at the aligned position in real-time. The augmented reality technology is adopted to present information at the aligned position where the driver is looking at. To do this, we use an head tracker to provide interaction between user and 3D viewport. From the tracked head position, the system visualizes safe/dangerous areas, wind directions/velocity, and quantities of materials on tower crane's window through a transparent screen. It is designed to provide necessary information of tasks to the tower crane drivers at real-time, to increase the safety of construction field.