Electromechanical and electrochemical impedance spectroscopy for measuring and imaging fatigue damage
US6151969A · kind A · utility
26Cited by
5References
21Claims
0Family size
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Key dates
| Filing date | Jul 14, 1998 |
| Grant date | Nov 28, 2000 |
| Priority date | — |
| Expiry date | Jul 14, 2018 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N17/02
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
EIS and EMIS methods of assessing the fatigue status of a material. The EIS method uses an electrochemical transducer cell to apply electrical perturbations to the material, and to acquire voltage and current measurements over a range of frequencies. The impedance at each frequency is calculated, resulting in impedance spectrum data. This data is correlated to reference data representing the fatigue life of the material. The EMIS method is similar except that mechanical instead of electrical perturbations are applied to the material.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.