Method for examining defect in prestressed tendon and apparatus therefor
US7689020B2 · kind B2 · utility
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6References
9Claims
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Key dates
| Filing date | Oct 19, 2006 |
| Grant date | Mar 30, 2010 |
| Priority date | — |
| Expiry date | Jan 28, 2029 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N23/04
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A penetrating radiation is used to examine a prestressed tendon in a prestressed concrete. A comparing object is used, whose position and size are known in advance. A magnifying rate of an image size of the comparing object projected on an imaging device is calculated. By using the magnifying rate and by comparing the image sizes of the prestressed tendon and the comparing object projected on the imaging device, the defect size of the prestressed tendon can be figured out.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.