A comparison of discrimination capabilities of time- and frequency-domain electromagnetic induction systems

2005 ◽  
Author(s):  
Sailaja V. Chilaka ◽  
Daniel L. Faircloth ◽  
Lloyd S. Riggs ◽  
Michael E. Baginski
Keyword(s):  
Frequency Domain ◽  
Electromagnetic Induction

Frequency domain electromagnetic induction survey in the intertidal zone: Limitations of low-induction-number and depth of exploration

2014 ◽  
Vol 100 ◽  
pp. 14-22 ◽  
Author(s):  
Samuël Delefortrie ◽  
Timothy Saey ◽  
Ellen Van De Vijver ◽  
Philippe De Smedt ◽  
Tine Missiaen ◽  
...  
Keyword(s):  
Frequency Domain ◽  
Intertidal Zone ◽  
Electromagnetic Induction

Sensitivity of multi-coil frequency domain electromagnetic induction sensors to map soil magnetic susceptibility

2010 ◽  
Vol 61 (4) ◽  
pp. 469-478 ◽  
Author(s):  
D. Simpson ◽  
M. Van Meirvenne ◽  
E. Lück ◽  
J. Rühlmann ◽  
T. Saey ◽  
...  
Keyword(s):  
Magnetic Susceptibility ◽  
Frequency Domain ◽  
Electromagnetic Induction ◽  
Soil Magnetic Susceptibility

scholarly journals Field Comparison of Electrical Resistance, Electromagnetic Induction, and Frequency Domain Reflectometry for Soil Salinity Appraisal

Soil Systems ◽  
2020 ◽  
Vol 4 (4) ◽  
pp. 61
Author(s):  
Fernando Visconti ◽  
José Miguel de Paz
Keyword(s):  
Electrical Conductivity ◽  
Frequency Domain ◽  
Soil Salinity ◽  
Electrical Resistance ◽  
Electromagnetic Induction ◽  
Linear Regression Models ◽  
Bulk Electrical Conductivity ◽  
Mass Fractions ◽  
Frequency Domain Reflectometry ◽  
Different Depths

By using different physical foundations and technologies, many probes have been developed for on-site soil salinity appraisal in the last forty years. In order to better understand their respective technical and practical advantages and constraints, comparisons among probes are needed. In this study, three different probes, based on electrical resistance (ER), electromagnetic induction (EMI), and frequency domain reflectometry (FDR), were compared during a field survey carried out in a large salt-threatened agricultural area. Information about the soil bulk electrical conductivity (σb) at different depths was obtained with each of the probes and, additionally, other soil properties were also measured depending on the specifications of each instrument and, moreover, determined in samples. On average, the EMI and FDR techniques could be regarded as equivalent for σb measurement, whereas ER gave higher σb values. Whatever the case, EMI, and also ER, had to be supplemented with information about soil clay, organic matter, and water mass fractions to attain, despite this effort, poor soil salinity estimations by means of multiple linear regression models (R2 < 0.5). On the contrary, FDR needed only probe data to achieve R2 of 0.7, though root mean standard error (RMSE) was still 1.5 dS m−1. The extra measurements and calculations that modern electrical conductivity contact probes integrate, specifically, those based on FDR, remarkably increase their ability for soil salinity appraisal, although there is still room for improvement.

Enhanced UXO Discrimination Using Frequency-Domain Electromagnetic Induction

2007 ◽  
Author(s):  
H. H. Nelson ◽  
D. A. Steinhurst ◽  
B. Barrow ◽  
T. Bell ◽  
N. Khadar ◽  
...  
Keyword(s):  
Frequency Domain ◽  
Electromagnetic Induction

scholarly journals A Finite‐Difference Frequency‐Domain Code for Electromagnetic Induction Tomography

1999 ◽  
Author(s):  
Nathan J. Champagne ◽  
James G. Berryman ◽  
H. Michael Buettner ◽  
J. Brian Grant ◽  
Robert M. Sharpe
Keyword(s):  
Finite Difference ◽  
Frequency Domain ◽  
Electromagnetic Induction ◽  
Difference Frequency ◽  
Finite Difference Frequency Domain
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