Detection circuit and detection method for magnetostrictive torque sensor
US11346731B2 · kind B2 · utility
1Cited by
9References
9Claims
0Family size
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Key dates
| Filing date | Mar 2, 2021 |
| Grant date | May 31, 2022 |
| Priority date | — |
| Expiry date | Mar 2, 2041 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01L3/105
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A detection circuit for a magnetostrictive torque sensor is configured to detect a torque applied to a magnetostrictive material treated by shot peening. The detection circuit includes a detection coil provided around the magnetostrictive material, and a drive unit for providing alternating current excitation to the detection coil. The torque applied to the magnetostrictive material is detected based on a change in inductance of the detection coil, and the drive unit provides alternating current excitation at a frequency at which a skin effect thickness is not more than an effective depth of the shot peening.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.