×

MULTI-COMPONENT ELECTROMAGNETIC PROSPECTING APPARATUS AND METHOD OF USE THEREOF

  • US 20140012505A1
  • Filed: 03/27/2012
  • Published: 01/09/2014
  • Est. Priority Date: 03/31/2011
  • Status: Active Application
First Claim
Patent Images

1. A method of electromagnetic sensing comprising the steps of:

  • a) driving each transmitter of a three-component electric or magnetic dipole transmitter provided at a transmitter location to generate three multiplexed electromagnetic fields, and, while driving each transmitter of said three-component transmitter, measuring signals with each receiver of a three-component receiver provided at a receiver location, thereby obtaining nine received signals;

    b) repeating step (a) for a plurality of different transmitter locations, different receiver locations, or a combination thereof, thereby obtaining a set of received signals;

    c) selecting a sensing direction and a sensing position;

    d) determining a set of transmitter weights, such that wherein said weights are multiplied by electromagnetic fields produced at said sensing position by each transmitter at each transmitter location, and wherein a resulting set of weighted electromagnetic fields are summed over each transmitter location, a summed weighted field is enhanced in said sensing direction at said sensing position, and substantially suppressed at other positions and directions;

    e) multiplying each signal of said set of received signals by a corresponding transmitter weight, wherein, for a given three-component receiver, saidcorresponding transmitter weight is a weight determined in step (d) for a transmitter that was active when a signal was recorded with said given three-component receiver;

    f) summing a resulting set of weighted signals to obtain a focused signal; and

    g) inferring a presence or absence of a conductive body at said sensing position according to a strength of said focused signal.

View all claims
  • 1 Assignment
Timeline View
Assignment View
    ×
    ×