Patent ID: 7813883
Filing Date: 2010-10-12
Classification: G01V

Abstract:
1. A system for collecting resistivity data from the subsurface media under a roadbed comprising: a master controller; an array of electrodes comprised of electrode points in direct contact with a geological surface beneath the roadbed through a corresponding array of holes penetrating the roadbed, having at least a first electrode, a second electrode and a third electrode; the array of electrodes positioned in a generally horizontal plane generally parallel to the roadbed; a set of interconnected voltage control units connected to the array of electrodes and in data communication with the master controller, having at least a first voltage control unit, a second voltage control unit and a third voltage control unit; a current control unit, in data communication with the master controller, for providing an injection current and connected to the first voltage control unit; the first voltage control unit connected to the first electrode; the second voltage control unit connected to the first voltage control unit and connected to the second electrode; the third voltage control unit connected to the second voltage control unit and connected to the third electrode; the set of interconnected voltage control units cooperating to reconfigurably dispense the injection current to the first electrode, the second electrode and the third electrode; and the set of interconnected voltage control units further cooperating to reconfigurably measure the voltage between the first electrode, the second electrode and the third electrode.