| 摘要 |
<p>A proximity sensor (520) includes first and second components (522, 523) disposed on a sensor body (514) adjacent to one another. The first component (522, 524) is one of an emitter (522) and a receiver (524), and the second component (522a, 524a) is the other one of an emitter and a receiver, A third component (522b, 524b) is disposed adjacent the second sensor opposite the first sensor. The third component is an emitter if the first sensor is an emitter or a receiver if the first sensor is a receiver. Each component has a respective field of view (523, 525). First and second fields of view intersect, defining a first volume (VI) that detects a floor surface (10) within a first threshold distance (¾). The second and third fields of view intersect, defining a second volume (V2) that detects a floor surface within a second threshold distance (D</p> |
