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INDUCTIVE LOOP PRESENCE DETECTOR

  • US 20110251809A1
  • Filed: 10/12/2010
  • Published: 10/13/2011
  • Est. Priority Date: 10/12/2009
  • Status: Abandoned Application
First Claim
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1. An inductive loop presence detector powered by a line voltage, comprising:

  • a control unit that receives operating power from the line voltage;

    one or more sensing loops connected to the control unit, wherein the control unit powers the sensing loops and detects the presence or lack of presence of an object within the sensing loops based upon a sensed signal from the sensing loops; and

    a backup power supply connected to the control unit to supply a backup voltage to the control unit upon interruption of the line voltage.

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