| 摘要 |
The present invention relates to a crane collision preventing system to prevent a collision between a crane and an object in the lower side. Disclosed is the crane collision preventing system including a scanner sensor installed on a supporter at a specific height and sensing an object positioned at a specific height by scanning lights along a flat surface horizontal to the ground surface; a reflecting plate installed to face a direction horizontal to the scanner sensor; and a horizontality detecting unit detecting whether a scanning surface of the scanner sensor is horizontal to the ground surface or not. |
