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Method and apparatus for using an infrared reflectivity sensor in a security system

  • US 20080030328A1
  • Filed: 08/03/2006
  • Published: 02/07/2008
  • Est. Priority Date: 08/03/2006
  • Status: Active Grant
First Claim
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1. A security system, comprising:

  • an infrared (IR) sensor configured to be mounted proximate to a door to be monitored, the IR sensor having an IR transmitter and an IR receiver, the IR transmitter having an active period and an idle period, the IR transmitter transmitting control data packets during the active period, the IR receiver having an active period for detecting reflected data packets and IR data, each of the reflected data packets having a packet IR reflectivity;

    a processor providing the control data packets to be transmitted by the IR transmitter; and

    a memory storing a door IR reflectivity associated with a door surface of the door, the processor comparing the packet IR reflectivity to the door IR reflectivity to determine at least a door position of the door.

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