skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Magnetic vector field tag and seal

Abstract

One or more magnets are placed in a container (preferably on objects inside the container) and the magnetic field strength and vector direction are measured with a magnetometer from at least one location near the container to provide the container with a magnetic vector field tag and seal. The location(s) of the magnetometer relative to the container are also noted. If the position of any magnet inside the container changes, then the measured vector fields at the these locations also change, indicating that the tag has been removed, the seal has broken, and therefore that the container and objects inside may have been tampered with. A hollow wheel with magnets inside may also provide a similar magnetic vector field tag and seal. As the wheel turns, the magnets tumble randomly inside, removing the tag and breaking the seal.

Inventors:
;
Publication Date:
Research Org.:
The Regents of the University Of California, Los Alamos, NM (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1175009
Patent Number(s):
6,784,796
Application Number:
10/046,100
Assignee:
University Of California, The Regents Of OSTI
DOE Contract Number:  
W-7405-ENG-36
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
47 OTHER INSTRUMENTATION

Citation Formats

Johnston, Roger G., and Garcia, Anthony R. Magnetic vector field tag and seal. United States: N. p., 2004. Web.
Johnston, Roger G., & Garcia, Anthony R. Magnetic vector field tag and seal. United States.
Johnston, Roger G., and Garcia, Anthony R. Tue . "Magnetic vector field tag and seal". United States. https://www.osti.gov/servlets/purl/1175009.
@article{osti_1175009,
title = {Magnetic vector field tag and seal},
author = {Johnston, Roger G. and Garcia, Anthony R.},
abstractNote = {One or more magnets are placed in a container (preferably on objects inside the container) and the magnetic field strength and vector direction are measured with a magnetometer from at least one location near the container to provide the container with a magnetic vector field tag and seal. The location(s) of the magnetometer relative to the container are also noted. If the position of any magnet inside the container changes, then the measured vector fields at the these locations also change, indicating that the tag has been removed, the seal has broken, and therefore that the container and objects inside may have been tampered with. A hollow wheel with magnets inside may also provide a similar magnetic vector field tag and seal. As the wheel turns, the magnets tumble randomly inside, removing the tag and breaking the seal.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue Aug 31 00:00:00 EDT 2004},
month = {Tue Aug 31 00:00:00 EDT 2004}
}

Patent:

Save / Share: