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Title: Multi-sensor system for the detection and characterization of unexploded ordnance

Abstract

To fully characterize the inductive response of an isolated conductive object, such as buried unexploded ordinance, one needs to measure its response to stimulation by primary magnetic fields in three linearly independent (e.g., approximately orthogonal) directions. In one embodiment this is achieved by measuring the response to magnetic fields of three independent transmitters arranged to have magnetic fields that are linearly independent. According to the apparatus and methods employing the system of this invention, multiple transmitters and receivers of known relative position and orientation on a single platform are used. In a preferred embodiment, matched sets of receiver pairs connected in gradient mode are positioned adjacent to closely spaced pairs of transmitting coils, such that a minor displacement of one or both of the receiver coil pairs relative to the paired transmitting coils will not affect the detected secondary signals emitted by a buried metallic object.

Inventors:
 [1];  [1]
  1. Berkeley, CA
Issue Date:
Research Org.:
Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1024209
Patent Number(s):
7999550
Application Number:
12/237,668
Assignee:
The Regents of the University of California (Oakland, CA)
Patent Classifications (CPCs):
G - PHYSICS G01 - MEASURING G01V - GEOPHYSICS
DOE Contract Number:  
AC02-05CH11231; AC03-76SF00098
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
47 OTHER INSTRUMENTATION

Citation Formats

Morrison, Frank H, and Gasperikova, Erika. Multi-sensor system for the detection and characterization of unexploded ordnance. United States: N. p., 2011. Web.
Morrison, Frank H, & Gasperikova, Erika. Multi-sensor system for the detection and characterization of unexploded ordnance. United States.
Morrison, Frank H, and Gasperikova, Erika. Tue . "Multi-sensor system for the detection and characterization of unexploded ordnance". United States. https://www.osti.gov/servlets/purl/1024209.
@article{osti_1024209,
title = {Multi-sensor system for the detection and characterization of unexploded ordnance},
author = {Morrison, Frank H and Gasperikova, Erika},
abstractNote = {To fully characterize the inductive response of an isolated conductive object, such as buried unexploded ordinance, one needs to measure its response to stimulation by primary magnetic fields in three linearly independent (e.g., approximately orthogonal) directions. In one embodiment this is achieved by measuring the response to magnetic fields of three independent transmitters arranged to have magnetic fields that are linearly independent. According to the apparatus and methods employing the system of this invention, multiple transmitters and receivers of known relative position and orientation on a single platform are used. In a preferred embodiment, matched sets of receiver pairs connected in gradient mode are positioned adjacent to closely spaced pairs of transmitting coils, such that a minor displacement of one or both of the receiver coil pairs relative to the paired transmitting coils will not affect the detected secondary signals emitted by a buried metallic object.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue Aug 16 00:00:00 EDT 2011},
month = {Tue Aug 16 00:00:00 EDT 2011}
}

Works referenced in this record:

Optimizing receiver configurations for resolution of equivalent dipole polarizabilities in situ
journal, July 2005


Multi-transmitter multi-receiver null coupled systems for inductive detection and characterization of metallic objects
journal, March 2007


Estimating equivalent dipole polarizabilities for the inductive response of isolated conductive bodies
journal, June 2004