| 摘要 |
An obstacle-detecting apparatus for a powered door or a frame of the door includes a circuit board 76, a surface-mount element for emitting or receiving radiation 78 and a radiation re-directing device 80. The surface-mount element and radiation re-directing device are both mounted on the circuit board, the radiation re-directing device being at a defined position relative to the surface-mount element. The re-directing device includes a reflecting member, mounted to sit at a defined angle relative to radiation emitted from or received by the surface-mount element, for re-directing the radiation. That system works in association with a visible-light display system to inform persons approaching an elevator car whether it is possible to safely enter the car. |
