Seeing is believing: AR-assisted blind area assembly to support hand-eye coordination

The assembly stage is a vital phase in the production process and currently, there are still many manual tasks in the assembly operation. One of the challenges of manual assembly is the issue of blind area assembly since the visual obstruction of the hands or a part can lead to more errors and lower assembly efficiency. In this study, we developed an AR-assisted assembly system that solves the occlusion problem. Assembly workers can use the system to achieve comprehensive and precise hand-eye coordination (HEC). Additionally, we designed and conducted a user evaluation experiment to measure the learnability, usability, and mental effort required for the system for other HEC modes. Results indicate that hand position is the first visual information that should be considered in blind areas. Besides, the Intact HEC mode can effectively reduce the difficulty of learning and mental burden in operation, while at the same time improving efficiency.