发明名称 |
ELECTROMAGNETIC ANALYSIS OF CONCRETE TENSIONING STRANDS |
摘要 |
Discloses methods to perform magnetic testing of tensioning elements in a pre-stressed concrete cylinder, such as a pipe or water reservoir and testing apparatus. The apparatus includes magnetic flux production means and detector means disposed proximal to a surface of the cylinder in a plane in common with the magnetic flux production means that is orthogonal to an axis of the cylinder. The apparatus operates over a range of low frequency signals, for example, between 20 and 300 hertz or a pulse. Output of the inspection apparatus includes a signal and distance plot showing the results of testing a cylinder at one or more frequencies. In accordance with another method of analysis, a characteristic of the phase of the output over distance is plotted, including the phase or representations of the in-phase or quadrature components of the received signal in relation to the driving signal. |
申请公布号 |
WO02061412(A3) |
申请公布日期 |
2004.07.08 |
申请号 |
WO2002CA00085 |
申请日期 |
2002.01.29 |
申请人 |
PURE TECHNOLOGIES LTD.;PAULSON, PETER, O.;MCINTYRE, JOHN;MITCHELL, KEVIN |
发明人 |
PAULSON, PETER, O.;MCINTYRE, JOHN;MITCHELL, KEVIN |
分类号 |
G01N27/82;G01N27/90;G01N33/38 |
主分类号 |
G01N27/82 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|