| 摘要 |
<p>For the control of a self-propelled appliance (1), e.g. a vacuum cleaner and/or floor sweeper, it is fitted with at least two light-sensitive elements (5,11). A lamp (6), positioned at will, is directed at the appliance for it to move towards the lamp through its directional light reception characteristics. One light element can be directed at the floor (8) and the other light element can rotate by 360[deg] .</p> |
