Imaging method and device based on guided wave scattering of omni-directional magneto-acoustic transducers
US10338035B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Dec 5, 2017 |
| Grant date | Jul 2, 2019 |
| Priority date | — |
| Expiry date | Mar 14, 2038 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N29/4427
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An imaging method based on guided wave scattering of omni-directional EMATs includes: selecting an nth omni-directional EMAT from N omni-directional EMATs uniformly arranged in a detection region of a metal plate to be detected as an excitation EMAT; selecting m omni-directional EMATs as omni-directionally receiving EMATs to omni-directionally receive an ultrasonic guided wave signal, and calculating a travel time and intensity of the ultrasonic guided wave signal; judging whether the excitation EMAT and the omni-directionally receiving EMATs form a scattering group, if yes, calculating a position of a scattering point; judging whether the position of the scattering point is within a preset scattering region, if yes, determining the position of the scattering point as an effective scattering point; repeating the above steps until all N omni-directional EMATs have excited omni-directional ultrasonic guided waves, and performing curve fitting on all effective scattering points to obtain a defect profile image.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.