Patent ID: 11959524
Assignee: OTIS GESELLSCHAFT M.B.H.
Field: Mechanical elements (Mechanical engineering)
Classification: CPC B  F | IPC B  F

Claim 8:
9. A method for monitoring a brake lining of one of an escalator, a moving walkway or an elevator system, the method comprising:
obtaining a signal from a non-contact sensor disposed on one side of the brake lining, the signal dependent on the distance between the non-contact sensor and a braking surface disposed on the other side of the brake lining; and
determining the state of the brake lining based on said signal; and
calculating a thickness of the brake lining from the received signal;
obtaining a plurality of measurements from the signal from the non-contact sensor; and
predicting from said plurality of measurements a replacement time for the brake lining;
wherein the non-contact sensor is a magnetic sensor arranged to detect the strength of a magnetic field between the sensor and the braking surface and outputs a signal dependent on the distance between the non-contact sensor and the braking surface.