Elevator car position detection device
US10399817B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 1, 2013 |
| Grant date | Sep 3, 2019 |
| Priority date | — |
| Expiry date | Jul 21, 2033 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K2017/9706
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
In an elevator car position detection device, a magnetic field generator generates an eddy current magnetic field on an identification member, and a magnetic field detector detects the eddy current magnetic field generated on the identification member. The identification member includes a plurality of conductors which are continuously arranged along an ascending and descending direction of a car, and are relatively different in a plate thickness with respect to a skin depth of an eddy current generated by the magnetic field generator on the identification member. A shape of at least a part of a boundary between the adjacent conductors is a straight line or a curve tilted with respect to a direction orthogonal to the ascending and descending direction of the car.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.