Position-determining system and method for ascertaining a car position of an elevator car
US12275619B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 11, 2019 |
| Grant date | Apr 15, 2025 |
| Priority date | — |
| Expiry date | Jul 6, 2042 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03M5/12
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A position-determining system and a method for ascertaining a car position of an elevator car use a code tape mounted next to the elevator car in parallel with a movement direction and that includes a code-mark pattern of individual code marks, a detection apparatus mounted on the elevator car that detects the code marks, and an evaluation unit that determines the car position on the basis of the detected code marks. Here, n successive code marks of the code-mark pattern form a position mark, the position marks are unambiguously arranged in an n-digit pseudorandom sequence of various position marks, the position marks form a single-track code-mark pattern, and a discrete car position is assigned to each position mark. A detection region of the detection apparatus has a detection length in the movement direction that is shorter than a position-mark length of a position mark in the movement direction.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.