发明名称 |
Eddy Current Probe for Surface and Sub-Surface Inspection |
摘要 |
An eddy current probe includes an excitation coil for coupling to a low-frequency alternating current (AC) source. A magnetoresistive sensor is centrally disposed within and at one end of the excitation coil to thereby define a sensing end of the probe. A tubular flux-focusing lens is disposed between the excitation coil and the magnetoresistive sensor. An excitation wire is spaced apart from the magnetoresistive sensor in a plane that is perpendicular to the sensor's axis of sensitivity and such that, when the sensing end of the eddy current probe is positioned adjacent to the surface of a structure, the excitation wire is disposed between the magnetoresistive sensor and the surface of the structure. The excitation wire is coupled to a high-frequency AC source. The excitation coil and flux-focusing lens can be omitted when only surface inspection is required.
|
申请公布号 |
US2012274319(A1) |
申请公布日期 |
2012.11.01 |
申请号 |
US201213457687 |
申请日期 |
2012.04.27 |
申请人 |
WINCHESKI RUSSELL A.;SIMPSON JOHN W.;U.S.A. AS REPRESENTED BY THE ADMINISTRATOR OF THENATIONAL AERONAUTICS AND SPACE ADMINISTRATION |
发明人 |
WINCHESKI RUSSELL A.;SIMPSON JOHN W. |
分类号 |
G01R33/12 |
主分类号 |
G01R33/12 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|