Magnetic sensor circuit for security sensing
US10488464B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Nov 11, 2016 |
| Grant date | Nov 26, 2019 |
| Priority date | — |
| Expiry date | Nov 11, 2036 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01H36/0073
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A sensor circuit for sensing a circuit change, e.g. circuit break, is described. It comprises a permanent or electro magnet for generating a magnetic field, a sensing system comprising one or more magnetic sensors configured for sensing an at least one dimensional magnetic field from the permanent magnet and for providing an output signal representative of said at least one dimensional magnetic field. The circuit also comprises a controller for detecting an event by comparing said output signal with reference data, said reference data comprising for at least one direction of said magnetic field a reference range having an upper boundary and a lower boundary wherein the upper boundary and lower boundary are magnetically unipolar.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.