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Searching system

  • US 6,731,214 B2
  • Filed: 06/28/2002
  • Issued: 05/04/2004
  • Est. Priority Date: 06/28/2002
  • Status: Expired due to Fees
First Claim
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1. A searching system comprising:

  • a plurality of global positioning system (GPS) satellites;

    at least one first transceiver for receiving a first GPS signal from the GPS satellites and returning a first position thereof through a first wireless communication unit;

    at least one second transceiver for receiving a second GPS signal from the GPS satellites, calculating a second position thereof and the first position received through a second wireless communication unit so as to achieve a relative position of the first transceiver with respect to the second transceiver, and displaying the relative position through a coordinated map, said second transceiver comprising;

    a second GPS unit for receiving the second GPS signal from the GPS satellites and calculating the second position of the second transceiver and the returned first position, thereby obtaining the relative position of the first transceiver with respect to the second transceiver;

    an audio encoder/decoder having an input connected to a microphone and an output connected to a loudspeaker, the audio encoder/decoder converting a digital input signal into an analog signal, outputting the analog signal through the loudspeaker, and converting an analog input signal from the microphone into a digital signal;

    a display unit for displaying a user'"'"'s information of the first transceiver including the user'"'"'s name, direction and distance on the coordinated map; and

    , a microprocessor connected to the second GPS unit, the second wireless communication unit, the audio encoder/decoder and the display unit, the microprocessor calculating the relative position of the first transceiver with respect to the second transceiver and displaying the relative position on the display unit, the microprocessor controlling the audio encoder/decoder to generate a warning sound when the microprocessor receives no response from the first transceiver, sending a calling sound to the first transceiver, and controlling the audio encoder/decoder for calling a user of the second transceiver as receiving a warning signal from the first transceiver.

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