Earth Resistivity Measurements Using Cylindrical Electrodes at Short Spacings

Baishiki, Rod S.; Österberg, Carin; Dawalibi, F.

doi:10.1109/mper.1987.5527302

Cited by 1 publication

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“…All the electrodes are immersed in a homogeneous, isotropic, and semi-infinite medium, and the four electrodes are modeled as points. In the circumstances, the resistivity of the medium is obtained from the following well-known expression [1], [3], [12] (1)…”

Section: Introductionmentioning

confidence: 99%

“…The modeling of slender cylindrical electrodes in the cylindrical coordinates for the determination of the resistivity in the four-electrode method has been presented by Baishiki et al [12] and the Baishiki's geometric factor is expressed as follows: (2) where and are the resistivity and geometric factor, respectively, in (2) and…”

Section: Introductionmentioning

confidence: 99%

“…It is worthwhile to note that (2) is derived in the cylindrical coordinates by assuming that the current distribution is uniform along the electrode except at the end of the electrode [12] as shown in Fig. 2(a).…”

Section: Introductionmentioning

confidence: 99%

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A New Geometric Factor for In Situ Resistivity Measurement Using Four Slender Cylindrical Electrodes

Chong

Tan

2008

IEEE Trans. Biomed. Eng.

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The four-electrode method is commonly used for in situ measurement of the electrical resistivity of biological tissues. In this paper, a new geometric factor between the resistivity and measured resistance using the four-electrode interface is derived in the prolate spheroidal coordinates and experimentally validated. Evaluation of the experimental results shows that the resistivities determined using both the derived geometric factor and a commercial conductivity meter are in close agreement even when the length of the immersed electrodes becomes long with respect to the inter-electrode spacing. The evaluation also shows the effect of the relative size of the sample volume when the limitation to semi-infinite volume begins to result in poor accuracy.

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Section: Introductionmentioning

confidence: 99%