| 摘要 |
The over-velocity detector uses a multi-channel light barrier (7) associated with the lift cabin and a redundant measuring rail (6) attached to the side of the lift shaft, with markings (10,13) defining a travel path (8) and a control path (9), which are scanned by the light barrier. The measuring rail may also have a safety path with markings in the form of slits or holes, the light barrier having at least 2 independent channels, positioned symmetrical to one another. |
