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Location tracking system

  • US 9,007,378 B2
  • Filed: 07/05/2010
  • Issued: 04/14/2015
  • Est. Priority Date: 05/07/2010
  • Status: Expired due to Fees
First Claim
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1. A location tracking system in whicha main terminal mounted with a first wireless communication module and a plurality of sub-terminals, each of which is mounted with a second wireless communication module and has an identification code, are configured to conduct wireless communication within a preset range,the main terminal includes a deviation display part that displays the plurality of sub-terminals having the identification code in a different color when at least one of the sub-terminals deviates from a preset safety range and enters a deviation boundary range, andeach sub-terminal includes a warning sound output part that receives a control signal sent from the main terminal to output a warning sound when the deviation display part displays the deviation of the sub-terminal,wherein:

  • the deviation display part includes a plurality of lamps that are displayed as numbers on a touch screen of the main terminal, and each of the lamps corresponds to one of the plurality of sub-terminals;

    the plurality of lamps are arranged in rows and columns so as to be displayed on the touch screen of the main terminal in a manner that is neutral to distances of the corresponding sub-terminals from the main terminal;

    each of the plurality of lamps is turned green or blue when the corresponding sub-terminal is within the preset safety range under the control of the first micro-computer, and red when the corresponding sub-terminal is within the deviation boundary range beyond the preset safety range under the control of the first micro-computer;

    the main terminal further includes an enter key that outputs a signal for instructing the first micro-computer to output a control signal for a warning sound to all of the sub-terminals of which the corresponding lamps are turned red; and

    each sub-terminal further includes a second micro-computer that controls the second wireless communication module and the warning sound output part when receiving the control signal for the warning sound from first wireless communication module by wireless.

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