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Title: Magnetic imager and method

Abstract

A magnetic imager 10 includes a generator 18 for practicing a method of applying a background magnetic field over a concealed object, with the object being effective to locally perturb the background field. The imager 10 also includes a sensor 20 for measuring perturbations of the background field to detect the object. In one embodiment, the background field is applied quasi-statically. And, the magnitude or rate of change of the perturbations may be measured for determining location, size, and/or condition of the object.

Inventors:
 [1];  [2];  [3]
  1. Shoreham, NY
  2. Kew Garden Hills, NY
  3. Wading River, NY
Issue Date:
Research Org.:
Associated Universities, Inc., Upton, NY (United States)
OSTI Identifier:
871063
Patent Number(s):
5650725
Application Number:
08/523,109
Assignee:
Associated Universities, Inc. (Washington, DC)
Patent Classifications (CPCs):
G - PHYSICS G01 - MEASURING G01V - GEOPHYSICS
DOE Contract Number:  
AC02-76CH00016
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
magnetic; imager; method; 10; generator; 18; practicing; applying; background; field; concealed; effective; locally; perturb; sensor; 20; measuring; perturbations; detect; embodiment; applied; quasi-statically; magnitude; rate; change; measured; determining; location; size; condition; magnetic field; determining location; magnetic imager; /324/

Citation Formats

Powell, James, Reich, Morris, and Danby, Gordon. Magnetic imager and method. United States: N. p., 1997. Web.
Powell, James, Reich, Morris, & Danby, Gordon. Magnetic imager and method. United States.
Powell, James, Reich, Morris, and Danby, Gordon. Tue . "Magnetic imager and method". United States. https://www.osti.gov/servlets/purl/871063.
@article{osti_871063,
title = {Magnetic imager and method},
author = {Powell, James and Reich, Morris and Danby, Gordon},
abstractNote = {A magnetic imager 10 includes a generator 18 for practicing a method of applying a background magnetic field over a concealed object, with the object being effective to locally perturb the background field. The imager 10 also includes a sensor 20 for measuring perturbations of the background field to detect the object. In one embodiment, the background field is applied quasi-statically. And, the magnitude or rate of change of the perturbations may be measured for determining location, size, and/or condition of the object.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1997},
month = {7}
}

Works referenced in this record:

A review of SQUID magnetometry applied to nondestructive evaluation
journal, March 1991


A comparison of the performance of planar and conventional second-order gradiometers coupled to a SQUID for the NDT of steel plates
journal, March 1989