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Entrance security system

  • US 8,514,076 B2
  • Filed: 01/22/2008
  • Issued: 08/20/2013
  • Est. Priority Date: 05/03/2003
  • Status: Active Grant
First Claim
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1. A security system for detecting an unauthorized activity and attempt to enter through an entrance of a secured area comprising:

  • an entrance barrier for controlling entry through the entrance including a plurality of intersecting structural tubular elements;

    a first fiber optic intrusion sensor including at least one fiber optic sensor line for sensing a first predetermined fault condition signifying an unauthorized attempt to open the barrier;

    a second fiber optic intrusion sensor including at least one fiber optic sensor line for sensing a second predetermined fault condition signifying one of a bend or a severance of a tubular element;

    at least one fiber optic scanning unit for scanning the optical sensor line and receiving reflected scan signals from the optical sensor line;

    a system computer for receiving and processing the scan signals from said scanning unit in real-time representing the state of the optical sensor lines and generating a real-time fault signal in response to detecting one of said first and second predetermined fault conditions; and

    a communication device communicating notice of the fault signal to security personnel.

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