Patent ID: 9511976
Filing Date: 2016-12-06
CPC Classification: B66B,G01B

Claim Text:
1. A feedback system for a motor of an elevator system, comprising: a first sensor disposed in proximity to a drive component of the elevator system, the first sensor being configured to detect a change in position of the drive component; and a processing circuit configured to receive a first data signal from the first sensor corresponding to the change in position of the drive component and generate a feedback signal for controlling the motor based on the first data signal; wherein the processing circuit-is configured to receive a second data signal from a second sensor and generate the feedback signal based on the first and second data signals; and; wherein the first data signal corresponds to a change in position of a traction sheave and the second data signal corresponds to a change in position of a tension member, the processing circuit being configured to determine a state of traction between the tension member and the traction sheave based on any discrepancies between the first and second data signals.