Built-in S-typed array eddy current testing probe and method for detecting defects of tubular structure
US10823702B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 20, 2019 |
| Grant date | Nov 3, 2020 |
| Priority date | — |
| Expiry date | Mar 20, 2039 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N27/904
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A built-in S-typed array eddy current testing probe and a method for detecting defects of a tubular structure are provided. The probe includes an exciting coil part and a plurality of pick-up coil parts, wherein: the exciting coil part includes multiple bundles of exciting coil wires helically wound on a columnar coil former with a same interval; two bundles of exciting coil wires with an interval of 180° are connected at an end of the columnar coil former, actually being a same group of exciting coil wire bundles; each pick-up coil part consists of two rows of pancake coils; each four pancake coils which are closely arranged in a square shape form one differential eddy current testing pick-up unit; a final output signal is a result of additions between signals of opposite pancake coils and subtractions between signals of adjacent pancake coils in each differential eddy current testing pick-up unit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.