Ground through communication system
A technology for through-the-earth communication and formation, applied in transmission systems, multi-frequency code systems, electrical components, etc., can solve problems such as limiting the propagation distance of elastic waves, complex formation medium structure, and large attenuation of elastic wave signal propagation.
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[0019] combine figure 1 and figure 2 , a through-the-earth communication system, an encoder 1 is provided at the signal input end, the encoder 1 is connected to the spread spectrum modulation and the power amplifier 2, the spread spectrum modulation and the power amplifier 2 are connected to the ground coupling speaker 3, and the ground coupling speaker 3 is located at the transmitting On or in the formation on one side of the terminal, the preferred way is to embed the ground-coupled speaker 3 in the formation. At the signal output end, the ground-coupling pickup 5 is located on or in the formation on the side of the receiving end. For example, the preferred way is to embed the ground-coupling pickup 5 in the formation. Between the ground-coupled speaker 3 and the ground-coupled pickup 5 is a formation medium 4 . The elastic wave signal is received by the ground coupling pickup 5, the ground coupling pickup 5 is connected to the low noise amplification and frequency select...
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