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A 1-D Solid-State-Sensor-Based Array System for Magnetic Field Imaging of Steel Reinforcing Bars Embedded Within Reinforced Concrete

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4 Author(s)
Benitez, D.S. ; Sensing, Imaging, & Signal Process. Group, Univ. of Manchester, Manchester, UK ; Sung Quek ; Gaydecki, Patrick ; Torres, V.

This paper describes a linear 1-D solid-state-based magneto-inductive sensor array for detecting and imaging steel-reinforcing bars embedded within prestressed and reinforced concrete. Using a square coil of 300 mm times 300 mm times 2.5 mm and by only measures of the vertical component of the magnetic flux density, pictorial representation of embedded rebars of different diameters and configurations can be imaged down up to a depth of 100 mm. The system is also capable of imaging metallic objects of different shapes. Experimental results obtained by scanning different steel bar specimens are presented.

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Instrumentation and Measurement, IEEE Transactions on  (Volume:58 ,  Issue: 9 )