Back to results
US 2005/0230191 A1Published application
Safety monitoring device for a lift car
AssigneeK.A. Schmersal Holding KG
InventorsVolker Heinzer, Olav Hennemann
Life of this patent
Estimating the term…
Loading patent…
Loading patent…
AssigneeK.A. Schmersal Holding KG
InventorsVolker Heinzer, Olav Hennemann
Estimating the term…
The invention relates to a safety monitoring device for a lift car which can be moved in a lift shaft by means of a traction drive via a lift control system and whose instantaneous position can be registered by means of a position registering device which supplies two position signals, produced independently of each other, in a predetermined time pattern, having two-channel evaluation of the position signals by means of a microprocessor in each case for location-dependent, instantaneous determination of the speed of the lift car and for comparison with a predefined movement profile, it being possible for a trigger signal that can be output via a safety relay stage to be generated if a predetermined instantaneous speed desired value is exceeded.
A safety monitoring device for a lift car which is moveable in a lift shaft by means of a traction drive via a lift control system and whose instantaneous position is registratable by means of a position registering device which supplies two position signals, produced independently of each other, in a predetermined time pattern, having two-channel evaluation of the position signals by means of a microprocessor in each case for location-dependent, instantaneous determination of the speed of the lift car and for comparison with a predefined movement profile, in the case a predetermined instantaneous speed desired value is exceeded it being provided to generate a trigger signal outputed via a safety relay stage.
Dependencies are inferred from the claim text.