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NONCONTACT OBSTACLE DETECTION SYSTEM USING RFID TECHNOLOGY

  • US 20130125467A1
  • Filed: 11/23/2011
  • Published: 05/23/2013
  • Est. Priority Date: 11/23/2011
  • Status: Active Grant
First Claim
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1. An obstacle detection system comprising:

  • a first component;

    a second component;

    a power source;

    a motor operatively connected to the second component and the power source;

    wherein the motor is configured to move the second component toward the first component when the motor is powered by the power source;

    a plurality of radio frequency identification tags (RFIDs) connected to one of the first component and the second component;

    a controller operatively connected to the motor and having;

    a transmitter operatively connected to the other of the first component and the second component;

    wherein the transmitter is operable to create a magnetic field between the first component and the second component;

    wherein each of the RFIDs is operable to provide a respective signal in response to the magnetic field; and

    a receiver configured to receive the respective signals; and

    wherein the controller is configured to cause the power source to modify power to the motor when the respective signals received by the receiver change due to at least a portion of the magnetic field being at least partially blocked or attenuated.

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