Quasi-zero stiffness absolute displacement sensor based on electromagnetic positive stiffness
US11573101B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 29, 2022 |
| Grant date | Feb 7, 2023 |
| Priority date | — |
| Expiry date | Apr 29, 2042 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01D5/125
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Disclosed is a quasi-zero stiffness absolute displacement sensor based on electromagnetic positive stiffness, and relates to the technical field of vibration measurement. The quasi-zero stiffness absolute displacement sensor comprises an eddy current displacement sensor unit, a negative stiffness unit, an intermediate connector, a positive stiffness unit, a bottom shell and a motion axis. The damping of the mechanism can be effectively reduced, the service life of the system is prolonged, and the mechanism size is reduced. By adjusting the number of layers of permanent magnets and coils in the electromagnetic positive stiffness unit and the electromagnetic negative stiffness unit and controlling the magnitude of current in the coils, electromagnetic force between the permanent magnets and the electromagnetic coils can be changed, the magnitude of positive stiffness and the magnitude of negative stiffness are adjusted, and control over the stiffness of the whole system is achieved.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.