发明名称 |
A method and apparatus for internal corrosion-inspection of pipes or tubes of a relatively small diameter. |
摘要 |
<p>Capacitive internal inspection of heat exchanger tubes. The tube wall functions as one capacitor plate and a probe moving through the tube contains the other plate of a capacitor. The gap between both plates will vary depending on the condition of the tube-wall. As a consequence the capacitance will change, which change can be monitored.</p> |
申请公布号 |
EP0321013(A2) |
申请公布日期 |
1989.06.21 |
申请号 |
EP19880202714 |
申请日期 |
1988.11.28 |
申请人 |
SHELL INTERNATIONALE RESEARCH MAATSCHAPPIJ B.V. |
发明人 |
BAKKER, HENDRICUS LEO MARIA;HOFF, ANTONIUS BERNARDUS MARIA |
分类号 |
G01B7/13;G01B7/287;G01N27/24 |
主分类号 |
G01B7/13 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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