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Intrusion detection system

  • US 8,849,608 B2
  • Filed: 11/01/2011
  • Issued: 09/30/2014
  • Est. Priority Date: 11/01/2011
  • Status: Active Grant
First Claim
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1. A method for surveillance, the method comprising:

  • sending a signal to sensors on a ground in an area, wherein the sensors are configured to generate electromagnetic radiation in response to the signal to activate the sensors;

    detecting current positions of the sensors from the electromagnetic radiation generated by the sensors in response to the signal;

    comparing the current positions of the sensors with a set of prior positions of the sensors to form a comparison; and

    determining whether an intrusion has occurred in the area using the comparison.

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