Method of formation of magnetostrictive layer and strain sensor using same
US5449418A · kind A · utility
18Cited by
6References
9Claims
0Family size
Assignee
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Key dates
| Filing date | Jun 7, 1993 |
| Grant date | Sep 12, 1995 |
| Priority date | — |
| Expiry date | Jun 7, 2013 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/12653
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A strain sensor for detecting strain in automobiles, robots, and the like includes a magnetostrictive layer. The magnetostrictive layer is formed by irradiating an alloy layer with a high energy density beam (such as a laser) to form a magnetostrictive layer having an amorphous structure. The resulting magnetostrictive layer has a magnetic inductance in the direction of irradiation that is much higher than in a perpendicular direction thereof. Using such a sensor, it is possible to selectively detect components of stresses and strains in a given direction.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.