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Shape estimation of the buried body from the ground surface potential distributions generated by current injection; Tsuryu ni yoru chihyomen den`i bunpu wo riyoshita maizobutsu keijo no suitei

Abstract

Ground surface potential distribution generated by current injection was studied to estimate the shape of buried bodies. Since the uniform ground system including a homogeneous buried body is perfectly determined with the surface shape of a buried body and resistivities in/around a buried body, inversion is easy if the surface shape is described with some parameters. N electrodes are arranged in 2-D grid manner on the ground, and two electrodes among them are used for current injection, while the others for measurement of potentials. M times of measurements are repeated while changing combination of electrodes for current injection. The potential distribution measured by the mth electrode pair is represented by N-2 dimensional vectors. The square error between this distribution and calculated one is the function of k parameters on the surface shape and resistivities on a buried body. Both shape and resistivities can be estimated by solving an optimum value problem using the square error as evaluation function. Analysis is easy for a spherical body with 6 unknown parameters, however, it is difficult for more complex bodies than elliptical one or more than two bodies. 5 refs., 9 figs.
Authors:
Takahashi, Y; Okamoto, Y; [1]  Noguchi, K; [2]  Teramachi, Y; [3]  Akabane, H; Agu, M [4] 
  1. Chiba Institute of Technology, Chiba (Japan)
  2. Waseda University, Tokyo (Japan)
  3. University of Industrial Technology, Kanagawa (Japan)
  4. Ibaraki University, Ibaraki (Japan)
Publication Date:
Oct 01, 1996
Product Type:
Conference
Report Number:
CONF-9610294-
Reference Number:
SCA: 440700; 422000; 580000; PA: NEDO-96:914778; EDB-97:075216; SN: 97001782547
Resource Relation:
Conference: 95. SEGJ conference, Butsuri tansa gakkai dai 95 kai (1996 nendo shuki) gakujutsu koenkai, Kyoto (Japan), 21-23 Oct 1996; Other Information: PBD: Oct 1996; Related Information: Is Part Of Proceedings of the 95th SEGJ Conference; PB: 344 p.; Butsuri tansa gakkai dai 95 kai (1996 nendo shuki) gakujutsu koenkai koen ronbunshu
Subject:
44 INSTRUMENTATION, INCLUDING NUCLEAR AND PARTICLE DETECTORS; 42 ENGINEERING NOT INCLUDED IN OTHER CATEGORIES; 58 GEOSCIENCES; EARTH CRUST; SURFACES; ELECTRIC POTENTIAL; ELECTRIC CURRENTS; SPATIAL DISTRIBUTION; BODY; UNDERGROUND; DETECTION; SHAPE; PATTERN RECOGNITION; ELECTRIC CONDUCTIVITY; LEAST SQUARE FIT; SPHERES; ELLIPTICAL CONFIGURATION
OSTI ID:
472683
Research Organizations:
Society of Exploration Geophysicists of Japan, Tokyo (Japan)
Country of Origin:
Japan
Language:
Japanese
Other Identifying Numbers:
Other: ON: DE97743637; TRN: 96:914778
Availability:
Available from The Society of Exploration Geophysicists of Japan, 2-18, Nakamagome 2-chome, Ota-ku, Tokyo, Japan; OSTI as DE97743637
Submitting Site:
NEDO
Size:
pp. 228-232
Announcement Date:

Citation Formats

Takahashi, Y, Okamoto, Y, Noguchi, K, Teramachi, Y, Akabane, H, and Agu, M. Shape estimation of the buried body from the ground surface potential distributions generated by current injection; Tsuryu ni yoru chihyomen den`i bunpu wo riyoshita maizobutsu keijo no suitei. Japan: N. p., 1996. Web.
Takahashi, Y, Okamoto, Y, Noguchi, K, Teramachi, Y, Akabane, H, & Agu, M. Shape estimation of the buried body from the ground surface potential distributions generated by current injection; Tsuryu ni yoru chihyomen den`i bunpu wo riyoshita maizobutsu keijo no suitei. Japan.
Takahashi, Y, Okamoto, Y, Noguchi, K, Teramachi, Y, Akabane, H, and Agu, M. 1996. "Shape estimation of the buried body from the ground surface potential distributions generated by current injection; Tsuryu ni yoru chihyomen den`i bunpu wo riyoshita maizobutsu keijo no suitei." Japan.
@misc{etde_472683,
title = {Shape estimation of the buried body from the ground surface potential distributions generated by current injection; Tsuryu ni yoru chihyomen den`i bunpu wo riyoshita maizobutsu keijo no suitei}
author = {Takahashi, Y, Okamoto, Y, Noguchi, K, Teramachi, Y, Akabane, H, and Agu, M}
abstractNote = {Ground surface potential distribution generated by current injection was studied to estimate the shape of buried bodies. Since the uniform ground system including a homogeneous buried body is perfectly determined with the surface shape of a buried body and resistivities in/around a buried body, inversion is easy if the surface shape is described with some parameters. N electrodes are arranged in 2-D grid manner on the ground, and two electrodes among them are used for current injection, while the others for measurement of potentials. M times of measurements are repeated while changing combination of electrodes for current injection. The potential distribution measured by the mth electrode pair is represented by N-2 dimensional vectors. The square error between this distribution and calculated one is the function of k parameters on the surface shape and resistivities on a buried body. Both shape and resistivities can be estimated by solving an optimum value problem using the square error as evaluation function. Analysis is easy for a spherical body with 6 unknown parameters, however, it is difficult for more complex bodies than elliptical one or more than two bodies. 5 refs., 9 figs.}
place = {Japan}
year = {1996}
month = {Oct}
}