Elevator car position detection device
US11319187B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 10, 2017 |
| Grant date | May 3, 2022 |
| Priority date | — |
| Expiry date | Feb 19, 2038 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01B7/003
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An elevator car position detection device is provided capable of preventing erroneous detection of a metal object other than an object to be detected. The elevator car position detection device includes: an object to be detected provided in one of a hoistway and a car of an elevator, the object to be detected being formed of a magnetic body and having a slit-like opening; and a magnetic detection device provided in the other of the hoistway and the car of the elevator, the magnetic detection device being configured to detect a change in magnetic flux density according to the slit-like opening when facing the object to be detected.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.