Elevator car separation based on response time
US7152714B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 19, 2003 |
| Grant date | Dec 26, 2006 |
| Priority date | — |
| Expiry date | May 19, 2023 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB66B1/20
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
The time required for each car to reach each up hall call and each down hall call is calculated (30, 33). These times are then arranged in categories and the number of landings in each category is identified. From fuzzy sets (FIGS. 7–10), the count of landings in each category determines a fuzzy set membership in a fuzzy category, such as FEW, SOME, MANY. The fuzzy membership of all non-zero memberships are then ANDed together (by multiplication). A relationship value is then determined (FIG. 11) by a metric with as many dimensions as there are categories, each dimension having as many parts as there are fuzzy categories in the fuzzy sets. The membership combination (the fuzzy summation) is then multiplied by a relationship value determined from the multi-dimensional metric to provide a corresponding separation metric of the invention.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.