Magnetic permeability sensor for using a single sensor to detect magnetic permeable objects and their direction
US11879326B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 16, 2020 |
| Grant date | Jan 23, 2024 |
| Priority date | — |
| Expiry date | Apr 22, 2041 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B2200/06
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Apparatus, methods, and systems are provided to count one or more magnetically permeable objects that have passed by a magnetic sensor and determine a direction thereof. The apparatus comprises a first permanent magnet; a second permanent magnet; a magnetic field sensor disposed between opposing poles of the first permanent magnet and the second permanent magnet; and a circuit connected to the magnetic field sensor, the circuit configured to count one or more magnetically permeable objects that have passed by the magnetic field sensor, and determine direction of the one or more magnetically permeable objects based on an output of the magnetic field sensor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.