Magnetoelastic shear force sensor with interference field compensation and method
US10627299B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Aug 6, 2018 |
| Grant date | Apr 21, 2020 |
| Priority date | — |
| Expiry date | Aug 6, 2038 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R33/18
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A magnetoelastic shear force transducer with an interference field compensation comprises a hollow component section having an interior recess. A load can be applied onto the hollow component section. The load causes a shear stress in the hollow component section. The hollow component section includes at least one annular magnetoelastically active section having a magnetic polarization surrounding the recess and magnetoelastic properties. Magnetic-field sensors include at least one magnetic-field sensor in the magnetoelastically active section and a magnetic-field compensating sensor associated with the magnetic-field sensor in the magnetoelastically active section. The magnetic-field compensating sensor is arranged outside the magnetoelastically active section. A sensor signal of the magnetic-field sensor is processed along with a compensating signal of the magnetic-field compensating sensor to reduce the influence of an interfering magnetic field. A method of determining an optimum distance between the magnetic-field sensor and an associated magnetic-field compensating sensor is also disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.