A DEVICE FOR SHALLOW FREQUENCY-DOMAIN ELECTROMAGNETIC INDUCTION SOUNDING
A.K. Manstein, G.L. Panin, S.Yu. Tikunov
Trofimuk Institute of Petroleum Geology and Geophysics, Siberian Branch of the RAS, 3 prosp. Akad. Koptyuga, Novosibirsk, 630090, Russia
Keywords: Electrical conductivity of soils; electronic measurement and instrumentation; frequency-domain electromagnetic induction sounding
Pages: 430-438
Subsection: GEOPHYSICS
Abstract
We have designed a frequency-domain electromagnetic induction sensor for imaging the distribution of electrical conductivity of soils in civil engineering applications. The device implements the ultimate technical feasibility of measuring harmonic signals on the ground surface. Digital recording and narrow bandpass filtering of synchronous detection allows a sufficient measurement accuracy for ~1 μV signals and suppression of power-line noise of more than 100 dB. We suggest practical methods for investigating the characteristics of the sensor and estimating its measurement accuracy.
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