Electrical Conductivity Instrument Construction and Application for Detecting Subsurface Wood and Metal
Journal Title: International Journal for Research in Applied Science and Engineering Technology (IJRASET) - Year 2015, Vol 3, Issue 10
Abstract
The pattern of electrical conductivity of the soil with wood and metal buried in a granite gneiss pegmatite environment using Wenner array configuration was investigated with locally made instrument. The 2kW electrical conductivity instrument used has been fabricated with CD4047 based square wave oscillator, high current IRF 250 MOSFET switches, a 3kW centre tapped transformer, bridge rectifier, AC and DC capacitors and a multimeter for current measurement. Two electrodes output the low frequency high power while the other two electrodes are connected to low frequency twin T filter and a multimeter for the measurement of voltage. The electrical conductivity data recorded from four-electrode Wenner array varied most between 0.0046S/m to 0.0108S/m on traverse 6 and maximum value of conductivity obtained also occurred on traverse 6. The result was shown on map and 3D image plots with golden Surfer 11TM. The map and 3D plots show two areas of low conductivity dip where woods were actually inserted in soil. The other two zones where high conductivities are prominent are correctly interpreted as the two cylindrical iron buried locations.
Authors and Affiliations
Afolabi O. M.
Keywords
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