Method and device for reducing the polygon effect in the reversing area of pedestrian coveyor systems
AssigneeKone Corporation
InventorAlexander Pietz
Life of this patent
Estimating the term…
Abstract
The invention relates to a method for reducing the polygon effect that occurs over the course of the reversing of a chain which can be used for a pedestrian conveyor, especially an escalator or moving walkway. To this end, a different rotational speed is superimposed upon the rotational speed of the reversing wheel via the electric drive which indirectly or directly acts upon said reversing wheel.
Claims10
A method for reducing the polygon effect that occurs during the course of reversing a chain, which can be used for a pedestrian conveyor system, comprising the step of:
- superimposing a different rotational speed upon the rotational speed of a reversing wheel about which the chain that is being reversed is guided via an electric drive, where said electric drive indirectly or directly acts upon said reversing wheel,
- wherein said electric drive is driven by at least one power supply unit in such a way that said electric drive rotates with a non-constant rotational speed (n), which substantially corresponds to a mathematical function of the chain and then acts upon said reversing wheel in an equalizing manner, and
- wherein at least one of the phase position of said reversing wheel and the velocity of the chain is respectively measured and this measured value is transmitted to and compared to stored values in a control unit, which is electrically connected to the at least one power supply unit thereby allowing the one power supply unit to be adjusted accordingly.
A device for reducing the polygon effect that occurs during the course of reversing a chain, which can be used for a pedestrian conveyor system, said device comprising:
- a reversing wheel about which the chain that is being reversed is guided;
- an electric driving motor which indirectly or directly acts upon said reversing wheel;
- at least one power supply unit coupled to said electric driving motor so that said electric driving motor can be driven with a non-constant rotational speed;
- a control unit having stored values and
- at least one sensor for detecting and measuring the phase position of said reversing wheel, said at least one sensor transmitting a measured value of the phase position and comparing to the stored values of the control unit, thereby adjusting the at least one power supply unit accordingly.
Dependencies are inferred from the claim text.