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Apparatus and Methods for Emergency Mine Communications Using Acoustic Waves, Time Synchronization, and Digital Signal Processing
Apparatus and Methods for Emergency Mine Communications Using Acoustic Waves, Time Synchronization, and Digital Signal Processing
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机译:使用声波,时间同步和数字信号处理进行应急矿山通信的设备和方法
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摘要
Apparatus and methods to implement post accident communications in a coal mine, in compliance with the MINER Act and MSHA regulations, are disclosed. Acoustic waves are transmitted bidirectionally through-the-earth in a simple robust half-duplex architecture in combination with signal-to-noise reduction techniques which ensure the ability to communicate using simple tools available in a mine. A personal electronics device, designed to be carried by each miner, automatically decodes acoustically transmitted text messages sent by rescue operations, and automatically encodes text messages by a miner to synchronized impulses manually produced by the miner. Signals are synchronized, in time of day protocol, between the miner and rescue operations. Digital signal processing techniques are disclosed.
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