US 2025/0128913 A1 · SYSTEM AND METHOD FOR MEASURING TENSION MEMBER ELONGATION

Abstract

An apparatus and method for an elevator system includes an elevator car that is supported for movement within a hoistway by at least one suspension member and a counterweight that is coupled to the elevator car with the at least one suspension member. The at least one suspension member is supported on a machine sheave at a location between the elevator car and the counterweight. The system detects a presence of one of the counterweight or elevator car as an initial detection, and subsequently detects a presence of the other of the counterweight or the elevator car as a subsequent detection. The system then determines an amount of travel of the elevator car that occurs between the initial detection and the subsequent detection to determine an amount of elongation of the at least one suspension member.

Claims20

Dependent claims

An elevator system, comprising:

at least one suspension member that supports an elevator car and facilitates movement of the elevator car in a hoistway;
a machine sheave supporting the at least one suspension member;
a counterweight coupled to the elevator car with the at least one suspension member;
a counterweight sensor that detects a presence of the counterweight;
a car sensor that detects a presence of the elevator car;
an encoder that starts determining travel distance as soon as one of the counterweight sensor or car sensor is triggered;
and
a control system that generates a control signal to use the encoder to determine an amount of travel of the elevator car that occurs between triggering one of the counterweight sensor and car sensor and triggering of the other of the counterweight sensor and the car sensor.

5 more elements

Dependencies are inferred from the claim text.

System and method for measuring tension member elongation

Life of this patent

System and method for measuring tension member elongation

Life of this patent

Abstract

Claims20