DISTRIBUTED SURVEY SYSTEM FOR OBTAINING UNDERGROUND ELECTRICAL CHARACTERISTICS AND DISTRIBUTED SURVEY METHOD USING SAME

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,...

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Bibliographische Detailangaben
Hauptverfasser: SANO, KOU, SHIMA, HIROMASA, YAMASHITA, YOSHIHIRO
Format: Patent
Sprache:eng ; fre ; jpn
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Zusammenfassung: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. L'invention concerne un système d'étude distribuée permettant d'obtenir des caractéristiques électriques souterraines et un procédé d'étude distribuée utilisant ledit système d'étude distribuée, ledit système d'étude distribuée étant capable de regrouper de manière flexible des objectifs d'étude, conditions géographiques de la zone d'étude, etc. différents et étant ainsi capable d'obtenir des caractéristiques électriques souterraines sur un intervalle de temps plus court et plus efficacement que les technologies existantes. Dans la présente invention, une pluralité d'unités d'étude (1, 2, 3, , (N−1), N) sont distribuées à travers une zone dans laquelle les caractéristiques électriques souterraines doivent être obtenues. Chacune desdites unités d'étude comporte un des éléments suivants ou les deux : un ou plusieurs points d'alimentation en courant (TX) et un moyen d'alimentation en courant permettant de l'alimenter ou de les alimenter en courant sous la terre ; et/ou un ou plusieurs points de mesure (RX) et un moyen de mesure permettant de mesurer des signaux de réponse d