Damage detection apparatus, damage detection method and recording medium
US8374803B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jan 31, 2007 |
| Grant date | Feb 12, 2013 |
| Priority date | — |
| Expiry date | Oct 18, 2028 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N27/20
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A damage detection apparatus and method which detect a damage occurring in a specimen include energizing an inspection area on a specimen into a predetermined energized condition, measuring a potential difference at predetermined intervals in the inspection area, and analyzing an existence or otherwise of a damage, and a shape thereof, based on a plurality of items of potential difference data. Parameters specifying a hypothetical damage are hypothesized in advance and, based on the potential difference data, calculation is executed using a maximum likelihood estimation method on a double body in which hypothetical specimens are doubled by bringing together their front surfaces, and furthermore on a quadruple body quadrupled by bringing rear surfaces of hypothetical specimens together, a maximum likelihood estimation value of the parameters is calculated.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.