Quasi-zero-stiffness based six-degree-of-freedom absolute displacement and attitude measurement device
US12013237B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Dec 14, 2020 |
| Grant date | Jun 18, 2024 |
| Priority date | — |
| Expiry date | Jul 21, 2042 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01B5/004
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The present invention discloses a quasi-zero-stiffness (QZS) based six-degree-of-freedom (6-DOF) absolute displacement and attitude measurement device. A lower end coil and an upper end coil are respectively charged with currents in the opposite directions; The electromagnetic field and the magnetic fields of an upper magnet and a lower magnet per se are mutually acted to produce an electromagnetic stiffness opposite to the stiffness of a spring. The stiffness of the whole leg is close to zero stiffness. When the to-be-measured platform generates space motion, the reference platform is in the stationary state. At this point, the deformation amounts of the six legs can be measured by laser displacement sensors. The six deformation amounts are respectively inputted into the displacement and attitude resolver, and by forward kinematic solution of the 6-DOF device, the displacement and the attitude of the to-be-measured platform can be obtained.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.