Anti-bunching method for dispatching elevator cars
US4790412A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 16, 1988 |
| Grant date | Dec 13, 1988 |
| Priority date | — |
| Expiry date | Mar 16, 2008 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB66B2201/226
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A method of assigning hall calls to a plurality of elevator cars in an ETA strategy in which up hall calls are scanned upwardly and down calls downwardly. A hall call floor at which the scan has stopped for the purpose of assigning or reassigning a hall call at the floor is called a "scan floor". The floor of the advanced position of the car being considered for assignment is called the "AVP floor". In order to favor the clustering of closely adjacent stops in a given car, and thus minimize car bunching, when a car has an intervening stop between the AVP floor and the scan floor, either the travel distance between the AVP floor and the scan floor, or the travel distance from an intervening stop to the scan floor, is used to develop a dynamic bias for the ETA of the associated car. The dynamic or variable bias is inversely proportional to the travel distance, i.e., the number of floors, between the relevant floors.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.