20-06-2013 дата публикации
Номер: US20130157713A1
Принадлежит:
An underground radio communications and personnel tracking system uses a cap-lamp worn by a miner when underground in a mine. A cap-lamp transceiver provides voice and text communication on ultra-low frequency (ULF) to ultra-high frequency (UHF) carrier frequencies and modulation adapted by programming of a software defined radio to making selective and agile radio contacts via through-the-earth, conductor/lifeline, coal seam, tunnel, and ionosphere/earth-surface waveguides for transmission of electromagnetic waves. These waveguides comprise layered earth coal and mineral deposits, and manmade mining complex infrastructures which serendipitously form efficient waveguides. Ultra-Low Frequency F1/F1 repeaters are placed underground in the mine, and providing for extended range of communication of the cap-lamp transceiver with radios and tracking devices above ground of the mine. 1. A cap-lamp and communications support system , comprising:{'b': 1502', '1504', '1506, 'a hard plastic shell () on which are directly mounted an LED lamp () and a rechargeable battery ();'}{'b': '1508', 'a radio transceiver () mounted to the hard plastic shell and powered by the rechargeable battery, and configured to provide two-way voice, data, and SMS text communications underground in a mine;'}{'b': 1510', '1516, 'a brim-mounted, air-core vertical magnetic dipole (VMD) antenna () connected to the radio transceiver and capable of coupling radio signals into a mine communications network (); and'}{'b': '1512', 'a passive RFID disk transponder () for providing electronic, wireless identification of a registered miner associated with the cap-lamp.'}2. The cap-lamp and communications support system of claim 1 , further comprising:{'b': '1514', 'a plurality of passive RFID disk transponders () for stationing at fixed, surveyed locations throughout a mine and which are encoded with location information that can be read-in through the VMD antenna and transceiver, wherein such information is ...
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