Method and device for determining the state of a rail stretch
US6809650B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 26, 2002 |
| Grant date | Oct 26, 2004 |
| Priority date | — |
| Expiry date | Nov 12, 2022 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB66B7/1246
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A method and a device for determining the state of a rail stretch utilize a receiver that is moved along the rail stretch to receive radio signals transmitted by at least three transmitters mounted in the elevator shaft. Spacing data is determined from the radio signals and is compared by an evaluating unit with reference data of the spacing to generate a result with respect to the state of the rail stretch. The positions of rail fastenings, connecting straps and shaft doors can be detected by additional sensors also moved along the rail stretch and are represented in a correction protocol to permit an efficient adjusting of the rail stretch.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.