Elevator car frame vibration damping device

Elevator – industrial lift truck – or stationary lift for vehicle – Having specific load support drive-means or its control – Includes control for power source of drive-means

Reexamination Certificate

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Details

C318S623000

Reexamination Certificate

active

06959787

ABSTRACT:
A device for active vibration damping dampens the structural resonance of an elevator car frame with a car body through measurement of the deformation of the frame. Under elastic deformation, a safety plank and a crosshead of the frame move parallel and relative to each other and two acceleration sensors aligned vertically (in the “z” direction) capture the movement. From the difference between the sensor signals, the “y” rotation of the safety plank and the crosshead is determined. The rotation and the signals from acceleration sensors on the frame are used to determine the shear movement of the frame.

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