Magnetised transducer element for torque or force sensor
US7219564B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Aug 14, 2000 |
| Grant date | May 22, 2007 |
| Priority date | — |
| Expiry date | Jul 26, 2021 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01L3/1435
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A magnetic torque transducer for a structure such as a disc through which torque is transmitted between a central shaft to which the disc is mounted and an outer periphery such as a gear wheel. The intervening region through which torque is transmitted is magnetized to provide a transducer element having two magnetized, annular regions which cooperate to emanate a magnetic field that is torque-dependent. The two magnetized regions may be longitudinally-magnetized through the disc or circumferentially magnetized with opposite polarities. A sensor assembly of non-contacting sensors is used to detect the emanated field and connected in circuitry to provide a torque-dependent signal. In an alternative a single magnetized annular region is employed. The annular region or regions need not be a complete annulus. The same disc-like structure can also be used as force sensor for measuring bending moments or other forces which result in stress occurring in the disc.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.