发明授权
US5200704A System and method including a buried flexible sheet target impregnated
with ferromagnetic particles and eddy current probe for determining
proximity of a non-conductive underground structure
失效
包括用于确定非导电性地下结构的临近的带有非线性颗粒和EDDY电流探测器的布置的柔性片材目标的系统和方法
- 专利标题： System and method including a buried flexible sheet target impregnated with ferromagnetic particles and eddy current probe for determining proximity of a non-conductive underground structure
- 专利标题（中）： 包括用于确定非导电性地下结构的临近的带有非线性颗粒和EDDY电流探测器的布置的柔性片材目标的系统和方法
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申请号： US662664申请日： 1991-02-28
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公开(公告)号： US5200704A公开(公告)日： 1993-04-06
- 发明人: William G. Clark, Jr. , Francis X. Gradich , Lee W. Burtner , Michael J. Metala
- 申请人： William G. Clark, Jr. , Francis X. Gradich , Lee W. Burtner , Michael J. Metala
- 申请人地址： PA Pittsburgh
- 专利权人： Westinghouse Electric Corp.
- 当前专利权人： Westinghouse Electric Corp.
- 当前专利权人地址： PA Pittsburgh
- 主分类号： G01B7/00
- IPC分类号： G01B7/00 ; G01B7/14 ; G01V3/10 ; G01V15/00
摘要：
Both a system and a method are provided which allows an eddy current probe to accurately determine both the proximity and dimensions of non-conductive structures which are normally invisible to such probes. The system includes a portable target medium that is movable into a known position with respect to the non-conductive structure, and that includes a conductive material that couples strongly with a fluctuating magnetic field, and a movable eddy current probe that emanates a fluctuating magnetic field and which generates a signal indicative of the magnitude of the interaction between the field and the portable target medium from which the distance between the two may be computed. The system may be used to determine the proximity of non-conductive structures such as plastic pipes that have been buried under ground, as well as the dimensions of such non conductive structures.
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