Abstract
We propose a two-dimensional position and angle sensors using cheap the steel-mark. The proposed mark can cover all zones in path width. Therefore, the mobile robot can be driving at an intermittent setting. This mark can also detect steel plate with in long liftoff with robustness by using the magnet for environment changes. We have developed a sensor mechanism and signal processing system to detect the landmark. The sensor was installed to the mobile robot. It showed useful for robot applicable.