System and method for determining the availability of an elevator car for response to hall calls
US5487451A · kind A · utility
17Cited by
15References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 26, 1994 |
| Grant date | Jan 30, 1996 |
| Priority date | — |
| Expiry date | Jan 26, 2014 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB66B1/18
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A system and method for determining the availability of an elevator car for response to hall calls includes a plurality of infrared sensors disposed to monitor the presence of an object within an elevator car. The cross-sectional area occupied by an object, or objects, within an elevator car is determined by the number of sensors generating output signals based upon reflections of transmitted radiation from such an object. The system monitors the cross-sectional area availability of the elevator car and categorizes the car as to its availability for responding to a hall call.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.