
doi: 10.1063/1.2184673
A system for detecting steel objects behind ferrous steel boundaries is described. It may be used to image steel reinforcing bars in concrete, where a steel sheet exists between the bars and the surface. The sensor comprises a transmitter, receiver and a dummy coil, which cancels cross-talk and enhances the signal from the bars. It is possible to penetrate a 2mm thick sheet at 125 Hz and image 16 mm diameter bars placed underneath.
Transformer coupling, Eddy current sensor, Imaging steel reinforcement, Digital signal processing
Transformer coupling, Eddy current sensor, Imaging steel reinforcement, Digital signal processing
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