Magnetoelastic strain sensor
US9726557B2 · kind B2 · utility
2Cited by
11References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 3, 2014 |
| Grant date | Aug 8, 2017 |
| Priority date | — |
| Expiry date | Nov 22, 2034 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10N35/101
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A strain sensor having an active area that includes a magnetoelastic resonator and spring configured so that the spring undergoes a greater amount of strain than the resonator when the sensor is under load. The sensor is anchored at opposite ends of the active area to a substrate for which strain is to be measured. An interrogating coil is used for wireless sensor readout. A biasing magnet may be included to provide a desired sensor response for the particular application of the sensor. The strain sensor may be implemented as a differential strain sensor that includes a second, strain-independent reference resonator.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.