Eddy current sensor array and eddy current sensor system for additive manufacturing
US11448617B2 · kind B2 · utility
0Cited by
5References
13Claims
0Family size
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Key dates
| Filing date | Nov 13, 2019 |
| Grant date | Sep 20, 2022 |
| Priority date | — |
| Expiry date | Feb 21, 2040 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P10/25
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An additive manufacturing apparatus for manufacture of aluminum parts layer-by-layer, the apparatus comprising an eddy current sensor for in-process measuring of contour and defects of manufactured layers with a defect resolution of at least 0.25 mm. Preferably, the eddy current sensor is embodied as a differential mode line sensor with dual use of sensor coils. Preferably, the array of the line sensor comprises a zig-zag-arrangement of sensor coils with a cross section of 0.15 mm2 maximal and with a core with an initial magnetic permeability of at least 5000, preferably a permalloy or metal glass coil core.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.