Method of detecting soil structure using voltage slope and...

Details Method of detecting soil structure using voltage slope and... Method of detecting soil structure using voltage slope and...

2006-04-27

2010-12-28

Whittington, Kenneth J (Department: 2858)

Electricity: measuring and testing

Of geophysical surface or subsurface in situ

Using electrode arrays, circuits, structure, or supports

C324S347000, C324S691000

Reexamination Certificate

active

07859266

ABSTRACT:
A method of accurately measuring earth resistance even when the composition state of soil that affects the installation of a metering device for measuring earth resistance is unknown. The method comprises measuring a potential at a first potential electrode point, measuring a potential at a second potential electrode point, calculating a voltage slope corresponding to a change rate of potential difference, using a potential difference between the first and second potential electrode points, and setting a potential point according to voltage slope characteristics and measuring earth resistance. A measurement approximating an accurate value of earth resistance can be performed even when soil composition characteristics are unknown at a site.

REFERENCES:
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Amoruso et al., Analysis of Large Grounding Systems for Earth-Resistance Measurements in Two-Layer Soils, IEEE Proceedings, vol. 136, Pt. C. No. 3, May 1989, all.
Jeff Jowett, Slope Method, NETA World, Summer 2002 pp. 1-2.
Jeff Jowett, Measuring Ground Resistance-The Fall of Potential Method, Spring 2002, pp. 1-4.
International Search Report for corresponding International Application N. PCT/KR2006001580 dated Apr. 27, 2006.
Ground Impedance Measurement and Interpretation in Various Soil Structures, Dawalibi et al., IEEE Power Engineering Society Winter Meeting, vol. 3, 2000, pp. 2029-2034.

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