Defining the traffic mode of an elevator, based on traffic statistical data and traffic type definitions
US5229559A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 15, 1990 |
| Grant date | Jul 20, 1993 |
| Priority date | — |
| Expiry date | Nov 15, 2010 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S706/90
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A method for controlling an elevator group in which statistical data on a traffic flow within an elevator group, representing the times, local and total volumes of the traffic, and a number of different traffic types used in a group control are stored in a memory unit belonging to the control system. The traffic flow is divided into two or more traffic components, the relative proportion or different traffic components and the prevailing traffic intensity are deduced from the traffic statistics, the traffic components and traffic intensity, i.e. the traffic factors, are subjected to assumptions whose validity is described by means of membership functions of the factors. A set of rules which correspond to different traffic types are formed from these factors and are assigned values by means of the factors and membership functions, the rule which best describes the prevailing traffic is selected, and the traffic type corresponding to the selected rule is used in the control of the elevator group.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.