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

Claim 7:
8. A brake of one of an escalator, a moving walkway or an elevator system, the brake comprising:
a braking surface;
a brake lever arranged to move between a retracted position and an engaged position;
a brake lining disposed between the braking surface and the brake lever such that when the brake lever is in the engaged position the brake lining is in contact with the braking surface; and
at least one non-contact sensor;
wherein the at least one non-contact sensor is a magnetic sensor arranged to detect the strength of a magnetic field between the sensor and the braking surface, and to output a signal dependent on the distance between the non-contact sensor and the braking surface; and
a controller arranged to receive the signal from the at least one non-contact sensor and calculate a thickness of the brake lining from the received signal;
wherein the controller is arranged to generate a mathematical regression model from a plurality of measurements of the signal from the at least one non-contact sensor and to use said model to predict a replacement time for the brake lining.