G - Physics – 01 – N
Patent
G - Physics
01
N
G01N 27/72 (2006.01) G01N 27/82 (2006.01) G01N 27/90 (2006.01) G01N 33/38 (2006.01)
Patent
CA 2356239
Discloses apparatus and methods of operation of the apparatus for performing magnetic testing of pre-stressing elements in a pre-stressed concrete pipe. The apparatus including magnetic flux production means disposed proximal to an inside surface of the pipe under test and detector means disposed proximal to an inside surface of the pipe in a plane of the magnetic flux production means that is orthogonal to an axis of the pipe. The apparatus operates over a range of low frequency periodic signals, for example, between 20 and 300 hertz. Output of the inspection apparatus produced in accordance with the method includes a multi-frequency plot showing the results of testing a pipe using two or more frequencies. In accordance with another method of inspection a single frequency is plotted along with a transformation plot, the transformation plot produced by transforming either the in-phase or quadrature components of the received signal in relation to the periodic driving signal by an angle alpha.
Kevin Mitchell
Mcintyre John
Paulson Peter O.
Blake Cassels & Graydon Llp
Kevin Mitchell
Mcintyre John
Paulson Peter O.
Pure Technologies Ltd.
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