Systems and methods for magnetostrictive sensing
US9074860B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 13, 2013 |
| Grant date | Jul 7, 2015 |
| Priority date | — |
| Expiry date | Dec 4, 2033 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R33/18
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Magnetostrictive sensing systems and methods are disclosed. One such system comprises a magnetostrictive wire having first and second ends. A magnet is movable along a length of the magnetostrictive wire. An excitation device is operable to apply an electrical excitation signal to the magnetostrictive wire. A torsional motion sensor is operable to detect a torsional motion of the magnetostrictive wire. A reflective termination is configured to reflect the torsional motion of the magnetostrictive wire. A processor is in communication with the excitation device and the torsional motion sensor. The processor is programmed to (i) apply the electrical excitation signal to the magnetostrictive wire with the excitation device, (ii) identify whether the torsional motion detected by the torsional motion sensor has been reflected by the reflection termination, and (iii) calculate a position of the magnet along the magnetostrictive wire based on only the detected torsional motion reflected by the reflection termination.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.