Dual-coil geophone accelerometer
US9238251B2 · kind B2 · utility
0Cited by
8References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 29, 2014 |
| Grant date | Jan 19, 2016 |
| Priority date | — |
| Expiry date | Jan 29, 2034 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R9/04
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An apparatus and a method for detecting vibration are disclosed. The apparatus comprises a housing, a magnetic structure forming a magnetic field in the housing, and a coil structure in the magnetic field, concentric of the magnetic structure. In response to external vibration, the coil structure and the magnetic structure are movable with respect to each other. The coil structure comprises at least two sets of coils overlapped in space, of which a first coil set is for detecting vibration and a second coil set is for applying control in accordance with a control signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.