Elevator controller

A controller for optimizing the leveling process of an elevator car at a stopping point for an elevator having an elevator controller which controls the stop of the car at a stopping point as a function of a specified distance X to the stopping point, and/or for an elevator car having a position sensor for detecting the position markings and/or for an elevator having an absolute positioning system, comprising a measuring tape fastened in the shaft, a measuring sensor on the car, the stored positions, and an evaluation unit for the position specification of the car,

• wherein the controller is designed, during each of at least two, in particular at least three journeys, to record a set of at least one same measured value, to determine a change dX or a changed distance X′ as a function of the set of the current journey and at least one past journey and to output the changed value X′ or the difference dX to the specified distance X,
• wherein the controller is designed to form a group from the respective set, which comprises at least the set and/or at least the main value of the set together with the change dX calculated from the set or the changed distance X′, and to select the corresponding group of a past journey as a function of the main value of the current journey and the past journey, and to determine the change dX or the changed distance X′ as a function of the selected group,
• wherein the main value of the set and/or the group assigned to the set is a specific measured value or a function of specific measured values of the underlying set, namely:
• is a function of acceleration and normal travel velocity and/or
• for the travel direction upward is the acceleration and for the travel direction downward is the normal travel velocity.