Elevator tension member stiffness estimation and monitoring
US10399820B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 19, 2014 |
| Grant date | Sep 3, 2019 |
| Priority date | — |
| Expiry date | Feb 23, 2034 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB66B5/0031
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A system for determining stiffness of an elevator system tension member includes a landing floor indicator to transmit a landing floor signal of an elevator car to a stiffness estimator, and a car position encoder to transmit a car position signal of the elevator car in a hoistway to the stiffness estimator. A machine position encoder transmits a machine position signal to the stiffness estimator. The tension member is operably connected to the machine to move the elevator car along the hoistway. A load weight sensor is located at the elevator car to transmit a load weight signal of the elevator car to the stiffness estimator. The stiffness estimator utilizes at least the landing floor signal, the car position signal, the machine position signal and the load weight signal to calculate an estimated stiffness of the tension member.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.