Method and device for adjusting array structure of omnidirectional electromagnetic acoustic transducers for imaging defect profile of metal plate
US10436753B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Jan 5, 2018 |
| Grant date | Oct 8, 2019 |
| Priority date | — |
| Expiry date | Jun 16, 2038 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2291/106
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method for adjusting array of omnidirectional EMATs includes: uniformly arranging N EMATs in a detection region of a metal plate; calculating positions of scattering points according to amplitudes and travel times of guided wave scattering signals, and forming a first defect profile curve by performing three smooth spline interpolations on coordinate data of positions of scattering points; calculating curvatures of points on the first defect profile curve by solving a first and second derivatives of a function of the first defect profile curve; determining an array adjustment region by comparing the curvature with a preset threshold, adjusting the array and calculating a second defect profile curve; and performing data fusion on the first and second defect profile curves to form a defect profile image of the metal plate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.