Mining electromagnetic type vibroseis low-frequency anti-interference seismic wave communication method

Abstract

The invention relates to a low-frequency anti-interference seismic wave communication method for a mining electromagnetic vibroseis. Low-frequency seismic waves are used as carriers to transmit information. The method comprises the following steps: firstly, designing a help-seeking and rescue information code table, mapping information to be transmitted into binary data, then carrying out error correction coding, designing two code element signals to respectively represent code elements '0'and '1', modulating the coded binary data, and carrying out error correction coding on the coded binary data; the modulated signal is used as a control signal of the electromagnetic vibroseis to control the vibroseis to generate a corresponding seismic wave, the seismic wave is received by a seismic detector, one code element signal is used for performing cross-correlation with a received seismic waveform, threshold detection is performed on a cross-correlation result to obtain received binary data, and then error correction decoding is performed to obtain received information. Through verification, the method can be used as an underground mine emergency communication means, solves the problem of underground remote communication of mine rescue, realizes remote communication, and has the advantages of high reliability, low cost and the like.

Description

Technical field[0001]The present invention relates to a seismic wave communication, and more particularly to electromagnetic controllable sources, seismic waves, and communication coding, especially for mining electromagnetic controllable sources of low frequency anti-interference seismic wave communication methods.Background technique[0002]Underground mines are regions where accidents have occurred. Since the environment is complicated, it is possible to encounter collapse, follow-up, gas leaks, etc., seriously threatening the safety of mine workers. The occurrence of mine disasters often leads to existing communications methods to function properly, so that the trapped people lose contact with the outside world, which hinders rescue progress and endangering people's safety. Therefore, in order to better support the safety of mine production and the effectiveness of emergency rescue, it is necessary to establish a reliable underground communication method for the underground commun...

AI Technical Summary

Problems solved by technology

Wired telephone communication quality is high, but communication cables are easily corroded in mines, and it is easy to cause line interruption in the event of a collapse accident

The low-frequency electromagnetic wave communication system includes the PED emergency command and paging system developed by the Australian Magnesium Antimony Company. The one-way communication distance is only 800m, and the system is mostly one-way communication, which cannot send and receive in both directions, and requires the deployment of large-size antennas, which has low energy efficiency.

The leaky cable is a high-frequency cable specially used for leaky communication. The outer metal shielding layer of the cable has a leaky slot to allow radio signals to enter and exit the cable. It provides two-way communication along the entire length of the cable. Each section of the cable is about 400m. After the amplifier is connected, due to the complicated manufacturing process and high cost of the leaky cable, the application of the leaky cable communication system is limited

Both the low-frequency electromagnetic wave communication system and the leaky cable communication system still have the disadvantages of short communication distance and low communication reliability

[0004] CN101383663A discloses "a kind of through-the-earth communication system", which uses the earth as the transmission channel, and uses the ground-coupled loudspeaker to send seismic waves for through-the-ground communication, which verifies the feasibility of using seismic waves for communication, but the seismic wave energy of the ground-coupled loudspeaker in the low frequency band The loss is too large, and the communication distance is relatively short

However, the existing pseudo-random sequence scanning adopts phase modulation technology. Due to the mechanical characteristics of the electromagnetic vibrator, phase mutation is difficult to realize. How to solve this problem is the key to the further development of pseudo-random sequence scanning.

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