Recently, the demand for moving robots working at construction sites is increasing, and research activities are in progress. Unlike industrial robots working in factories, construction robots must meet more functional requirements because they must handle a variety of complicated jobs at construction sites. The robots must also be able to locate themselves. This requires a technique that enables the robot to measure coordinates indicating its position. This paper describes a new method to enable robots working at large building sites to precisely locate themselves and describes the principle of this system and experimental results.
