Magnetostrictive torque sensor that prevents torque measurement error due to offset voltage
US9983075B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Mar 28, 2017 |
| Grant date | May 29, 2018 |
| Priority date | — |
| Expiry date | Mar 28, 2037 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01L3/102
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A torque sensor includes a bobbin that includes a plurality of first inclined guide paths inclined at a predetermined angle relative to an axial direction and a second inclined guide paths inclined at a predetermined angle relative to the axial direction in a direction opposite, first and fourth detection coils formed by winding insulated wires around the bobbin along the first inclined guide paths, and second and third detection coils formed by winding insulated wires around the bobbin along the second inclined guide paths. The first to fourth detection coils each form a plurality of layers laminated on the outer surface of the bobbin. The layers of the second and third detection coils are interposed between the plurality of layers of the first and fourth detection coils. The layers of the first and fourth detection coils are interposed between the plurality of layers of the second and third detection coil.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.