CA2214742A1 - System and method for contraband detection using nuclear quadrupole resonance - Google Patents

System and method for contraband detection using nuclear quadrupole resonance

Info

Publication number
CA2214742A1
CA2214742A1 CA002214742A CA2214742A CA2214742A1 CA 2214742 A1 CA2214742 A1 CA 2214742A1 CA 002214742 A CA002214742 A CA 002214742A CA 2214742 A CA2214742 A CA 2214742A CA 2214742 A1 CA2214742 A1 CA 2214742A1
Authority
CA
Canada
Prior art keywords
coil
signal
nqr
signals
quadrupole resonance
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CA002214742A
Other languages
French (fr)
Other versions
CA2214742C (en
Inventor
Erik E. Magnuson
Charles R. Moeller
Julian D. Shaw
Alan G. Sheldon
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Quantum Magnetics Inc
Original Assignee
Quantum Magnetics, Inc.
Erik E. Magnuson
Charles R. Moeller
Julian D. Shaw
Alan G. Sheldon
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Quantum Magnetics, Inc., Erik E. Magnuson, Charles R. Moeller, Julian D. Shaw, Alan G. Sheldon filed Critical Quantum Magnetics, Inc.
Publication of CA2214742A1 publication Critical patent/CA2214742A1/en
Application granted granted Critical
Publication of CA2214742C publication Critical patent/CA2214742C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R33/00—Arrangements or instruments for measuring magnetic variables
    • G01R33/20—Arrangements or instruments for measuring magnetic variables involving magnetic resonance
    • G01R33/44—Arrangements or instruments for measuring magnetic variables involving magnetic resonance using nuclear magnetic resonance [NMR]
    • G01R33/441—Nuclear Quadrupole Resonance [NQR] Spectroscopy and Imaging
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
    • G06V10/00—Arrangements for image or video recognition or understanding
    • G06V10/20—Image preprocessing
    • G06V10/255—Detecting or recognising potential candidate objects based on visual cues, e.g. shapes
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N24/00—Investigating or analyzing materials by the use of nuclear magnetic resonance, electron paramagnetic resonance or other spin effects
    • G01N24/08—Investigating or analyzing materials by the use of nuclear magnetic resonance, electron paramagnetic resonance or other spin effects by using nuclear magnetic resonance
    • G01N24/084—Detection of potentially hazardous samples, e.g. toxic samples, explosives, drugs, firearms, weapons

Abstract

A system for detecting a target substance within a class of explosives and narcotics containing quadrupolar nuclei through the use of nuclear quadrupole resonance (NQR). The system applies an RF signal to a coil (34) to excite the substance under test. If the target material is present, an NQR signal will be picked up by the same coil.
That signal is compared with known NQR signals in frequency and amplitude. A
signal is displayed in an appropriate way if a threshold value of the NQR signal is equalled or exceeded. The empty coil is statically tuned by means of adjusting the location or capacitance values, or both, of static tuning capacitors (102) in the coil.
The coil is tuned after the specimen is inserted into the coil by means of an auto-tune feature (36).
Effective RFI shielding (37) is provided to prevent external contaminating signals from being detected by the coil and to prevent RF signals from escaping from the scanner.
The invention also includes the method for performing tests with the system.
CA002214742A 1995-03-08 1996-03-05 System and method for contraband detection using nuclear quadrupole resonance Expired - Fee Related CA2214742C (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US08/400,679 1995-03-08
US08/400,679 US5592083A (en) 1995-03-08 1995-03-08 System and method for contraband detection using nuclear quadrupole resonance including a sheet coil and RF shielding via waveguide below cutoff
PCT/US1996/003286 WO1996030913A2 (en) 1995-03-08 1996-03-05 System and method for contraband detection using nuclear quadrupole resonance

Publications (2)

Publication Number Publication Date
CA2214742A1 true CA2214742A1 (en) 1996-10-03
CA2214742C CA2214742C (en) 2008-05-20

Family

ID=23584564

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002214742A Expired - Fee Related CA2214742C (en) 1995-03-08 1996-03-05 System and method for contraband detection using nuclear quadrupole resonance

Country Status (8)

Country Link
US (2) US5592083A (en)
EP (1) EP0813685B9 (en)
JP (1) JPH11500827A (en)
AU (1) AU699588B2 (en)
CA (1) CA2214742C (en)
DE (1) DE69634036T2 (en)
IL (1) IL117388A (en)
WO (1) WO1996030913A2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2467423C1 (en) * 2011-04-25 2012-11-20 Государственное образовательное учреждение высшего профессионального образования Московский государственный институт радиотехники, электроники и автоматики (Технический университет) (МИРЭА) Levitating quadrupole (versions)

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Also Published As

Publication number Publication date
IL117388A (en) 1998-08-16
WO1996030913A3 (en) 1997-01-16
DE69634036D1 (en) 2005-01-20
EP0813685B1 (en) 2004-12-15
US5592083A (en) 1997-01-07
JPH11500827A (en) 1999-01-19
WO1996030913A2 (en) 1996-10-03
US6194898B1 (en) 2001-02-27
AU6673796A (en) 1996-10-16
CA2214742C (en) 2008-05-20
IL117388A0 (en) 1996-07-23
EP0813685B9 (en) 2005-03-30
DE69634036T2 (en) 2005-12-08
AU699588B2 (en) 1998-12-10
EP0813685A2 (en) 1997-12-29

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