Title:
DISTRIBUTED SURVEY SYSTEM FOR OBTAINING UNDERGROUND ELECTRICAL CHARACTERISTICS AND DISTRIBUTED SURVEY METHOD USING SAME
Document Type and Number:
WIPO Patent Application WO/2014/125787
Kind Code:
A1
Abstract:
A distributed survey system for obtaining underground electrical characteristics and a distributed survey method using said distributed survey system are provided, said distributed survey system being capable of flexibly accommodating different survey purposes, survey-region geographical conditions, and the like and thus being capable of obtaining underground electrical characteristics over a shorter time frame and more efficiently than existing technologies. In the present invention, a plurality of survey units (1, 2, 3, …, (N−1), N) are distributed across a region in which underground electrical characteristics are to be obtained. Each of said survey units is provided with one or both of the following: one or more current-supply points (TX) and a current-supplying means for supplying current thereto underground; and/or one or more measurement points (RX) and a measuring means for measuring response signals from the measurement point(s) (RX) in response to the aforementioned current. A synchronization control means is provided in each survey unit. Said synchronization control means synchronize the operations of the current-supplying means and measuring means between survey units, supply currents from the plurality of current-supply points (TX) using waveforms encoded so as to yield a covariance of zero, and make the measuring means measure the response signals in response to said currents.
Inventors:
YAMASHITA YOSHIHIRO (JP)
SHIMA HIROMASA (JP)
SANO KOU (JP)
SHIMA HIROMASA (JP)
SANO KOU (JP)
Application Number:
PCT/JP2014/000574
Publication Date:
August 21, 2014
Filing Date:
February 04, 2014
Export Citation:
Assignee:
OYO CORP (JP)
B R G M BUREAU DE RECH S GEOL ET MINIERES (FR)
B R G M BUREAU DE RECH S GEOL ET MINIERES (FR)
International Classes:
G01V3/02
Foreign References:
| JP2008304343A | 2008-12-18 | |||
| JP2010156695A | 2010-07-15 | |||
| JP2000513809A | 2000-10-17 | |||
| JP2011508205A | 2011-03-10 | |||
| JP2008304343A | 2008-12-18 |
Other References:
See also references of EP 2957930A4
Attorney, Agent or Firm:
SHIMIZU, CHIHARU (JP)
Spring water Chiharu (JP)
Spring water Chiharu (JP)
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