Elevator encoder diagnostic system and diagnostic method
US11506524B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 7, 2019 |
| Grant date | Nov 22, 2022 |
| Priority date | — |
| Expiry date | Feb 5, 2040 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01D5/24461
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The present invention provides an elevator encoder diagnostic system and an elevator encoder diagnostic method by which input and output ports are kept from being occupied, functional restriction is suppressed, and abnormalities and malfunctions occurring in encoders provided in a dual-system can be detected. The elevator encoder diagnostic system according to the present invention includes a first encoder 16a and a second encoder 16b that are provided on a rotary portion of the elevator, a first diagnostic unit 21a connected to the first encoder, and a second diagnostic unit 21b connected to the second encoder, a first determination unit 23a and a second determination unit 23b that detect differences between encoder rotation amounts of the respective encoder systems and rotation detection signals of the other encoder systems, and, if a difference therebetween exceeds a predetermined threshold, determines that an abnormality has occurred.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.