| 摘要 |
The distance detector (1) consists of an infrared transmitter (6) and an infrared receiver (5) which are arranged at a distance from one another in a watertight housing (13). The infrared receiver (5) receives the radiation reflected from a ramp and determines its intensity. A buzzer (2) or a visual indicator (3) transmits a signal, the frequency or intensity of which changes with the distance (8) between the vehicle and the ramp. <IMAGE>
|
