发明名称 |
Method of and apparatus for detecting cross sectional area variations in an elongate object by the non-inductive measurement of radial flux variations |
摘要 |
A method and apparatus is provided for electromagnetically testing an elongate object such as a wire rope for cross-sectional area variations. The elongate object is magnetized over adjacent sections in opposing directions along a longitudinal axis of the elongate object. Variations in axial magnetic flux, which have been observed to be coincident with variations in the cross-sectional area of an elongate object, are measured by a plurality of non-inductive transducers. The transducers are interconnected to produce a composite signal. The composite signal is compared to a reference signal.
|
申请公布号 |
US5036277(A) |
申请公布日期 |
1991.07.30 |
申请号 |
US19880273269 |
申请日期 |
1988.11.18 |
申请人 |
CRUCIBLE SOCIETE ANONYME |
发明人 |
VAN DER WALT, NICOLAAS T. |
分类号 |
G01B7/12;G01B7/28;G01B7/32 |
主分类号 |
G01B7/12 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|