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Portable electronic device with guide function

  • US 8,483,956 B2
  • Filed: 02/05/2010
  • Issued: 07/09/2013
  • Est. Priority Date: 05/14/2009
  • Status: Expired due to Fees
First Claim
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1. A portable electronic device with guide function, comprising:

  • a housing;

    a processing unit positioned inside the housing, and for processing guiding information;

    a command unit positioned at least partially outside the housing and electrically connected to the processing unit, the command unit actuating the portable electronic device into a guiding mode controlled by the processing unit;

    a guiding unit positioned inside the housing and electrically connected to the processing unit, wherein the guiding unit is controlled by the processing unit to send radio frequency signals to detect external guide aids and receive feedback signals upon detection of the external guide aids, the processing unit receives the feedback signals from the guiding unit to determine a position of a user of the portable electronic device with guide function according to the feedback signals; and

    a detecting unit including at least three detecting modules, wherein at least one of the detecting modules sends a first detection signal transmitting along a first direction that is parallel to a ground, and at least two of the detecting modules send a second detection signal transmitting along a second direction that is oblique to the first direction and intersecting with the ground;

    wherein the detecting modules are positioned at least partially outside the housing, receives reflected signals from obstacles, and sends the reflected signals to the processing unit to detect the obstacle types and distance, the processing unit includes a measuring module, the measuring module controls the detecting unit to send detection signals, determines the types of the obstacles according to the reflected signals, and calculates the distance between the detecting unit and the obstacles according to time differences between the detection signals and the reflected signals, the processing unit compares the distance between the obstacles and each of the detecting modules with each other to determine the types of the obstacles; and

    wherein when the distance between the obstacle and the detecting module sending the first detection signal is set as L1, the distance between the obstacle and one detecting module sending the second detection signal is set as L2, and the distance between the obstacle and the other detecting module sending the second detection signal is set as L3, if L2=L3>

    L1, the processing unit determines that the obstacle is perpendicular to the ground;

    if L2>

    L3 or L2<

    L3, the processing unit determines that the obstacle protrudes from the ground or recesses.

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