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Method and Apparatus for Detecting Movement of a Shipping Container Latch

  • US 20090102650A1
  • Filed: 10/16/2008
  • Published: 04/23/2009
  • Est. Priority Date: 10/19/2007
  • Status: Active Grant
First Claim
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1. A method for detecting movement of a shipping container latch, comprising the steps of:

  • attaching a magnet to a movable portion of said shipping container latch;

    installing a sensing unit on a stationary portion of said container latch and proximate to a path traversed by said magnet for detecting changes in a magnetic field profile caused by movement of said movable portion of said container latch; and

    processing data representing said changes in said magnetic field profile to determine whether said movement of said container latch is authorized or incidental or a tampering incident.

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