Accelerometer using magnetic transducer technology
US7305882B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Oct 5, 2000 |
| Grant date | Dec 11, 2007 |
| Priority date | — |
| Expiry date | Dec 16, 2023 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01P15/11
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The accelerometer uses magnetic transducer technology. A mass-block, mounted to a base by an elongate member (shaft), moves relative to the base due to accelerations. The elongate-member has at least one magnetised transducer region (circumferential or longitudinal), which emanates a magnetic field as a function of member flexure due to acceleration of the mass-block. A sensor adjacent the transducer detects the field and derives a acceleration-representing signal. Alternatively, a mass-block is mounted to a central hub of a disc which is radially secured and has an intermediate region that flexes in response to acceleration. The intermediate region is magnetised to provide the magnetic transducer element. Otherwise, the mass-block is supported in an aperture of a reference-base by cores of inductors. The core permeability is a function of the compressive tensile forces on the cores due to acceleration of the mass-block. Resulting acceleration-dependent inductance changes provide signals for deriving an acceleration-representing output.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.