Torque sensor of the noncontact type
US4627298A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 24, 1984 |
| Grant date | Dec 9, 1986 |
| Priority date | — |
| Expiry date | Aug 24, 2004 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01L3/105
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
In a torque sensor of a noncontact type for sensing a rotary torque applied to a shaft, a magnetic ribbon of a film shape formed of a magnetic material and applied in advance with an induced magnetic anisotropy in the direction of an angle .theta. along the circumference of a shaft is bonded to the shaft along its circumference. A U-shaped first core member having end faces opposite to the ribbons is provided in the vicinity of the shaft. An exciting coil for producing a magnetic flux and a detecting coil are wound around the core member, and the magnetic flux produced by the exciting coil and introduced through the ribbon to the core member is detected by the detecting coil. When an exciting current of a predetermined frequency is supplied from an oscillator to the exciting coil to produce a magnetic flux, an output signal is generated from the detecting coil and is measured by a voltmeter.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.