| 摘要 |
A tracking system including multiple remote transmitters and a master receiver is disclosed herein. The tracking system is adaptable for use in tracking children, tracking inventory, and numerous other applications. Each of the remote transmitters transmits an electromagnetic signal having an identifying characteristic. The receiver uses the identifying characteristic of the transmitted signal to associate each received transmission with a particular transmitter. The receiver then determines the distance and direction of each transmitting unit from the master receiver, and displays that information, along with a notification, whenever a particular transmitting unit travels beyond a set notification distance from the master receiver.
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