| 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) 5 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, 10 defining a first volume (V1) that detects a floor surface (10) within a first threshold distance (Ds). The second and third fields of view intersect, defining a second volume (V2) that detects a floor surface within a second threshold distance (DAC). ys 520, 4 -'520d R eceiver 2 -------__ _ ------------ 524, Emitter -514 524b-' 522, 51* Receiver 525, 525 , :F 5 5 525b5 - 525a/ adi 1 10 S, I ~~s 1 * #I% Fl . ou</p> |
