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Radially focused eddy current sensor for detection of longitudinal flaws in metallic tubes
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Copyright Year | 1999 |
| Description | A radially focused eddy current sensor detects longitudinal flaws in a metal tube. A drive coil induces eddy currents within the wall of the metal tube. A pick-up cod is spaced apart from the drive coil along the length of the metal tube. The pick@up coil is positioned with one end thereof lying adjacent the wall of the metal tube such that the pick-up coil's longitudinal axis is perpendicular to the wall of the metal tube. To isolate the pick-up coil from the magnetic flux of the drive coil and the flux from the induced eddy currents. except the eddy currents diverted by a longitudinal flaw. an electrically conducting material high in magnetic permeability surrounds all of the pick-up coil except its one end that is adjacent the walls of the metal tube. The electrically conducting material can extend into and through the drive coil in a coaxial relationship therewith. |
| File Size | 593488 |
| Page Count | 11 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19990104280 |
| Archival Resource Key | ark:/13960/t2j72cv64 |
| Language | English |
| Publisher Date | 1999-08-24 |
| Access Restriction | Open |
| Subject Keyword | Magnetic Flux Patents Magnetic Permeability Focusing Charge Flow Devices Pipes Tubes Electric Coils Eddy Currents Walls Defects Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Patent |
