Under-well bi-directional voice direct-spreading through earth communication system and method

A technology of through-the-ground communication and direct expansion, applied in the field of communication systems, can solve the problems of large electromagnetic interference, limited application range, small channel capacity, etc., and achieve the effects of flexible hardware design, convenient debugging and modification, and low resource consumption.

Inactive Publication Date: 2009-02-04
WESTERN MINING CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

That is, digital information can only be sent from the ground to the ground or from the ground to the ground
[0009] (2) Large electromagnetic interference
[0010] (3) The scope of application is limited
[0011] (4) The channel capa

Method used

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  • Under-well bi-directional voice direct-spreading through earth communication system and method
  • Under-well bi-directional voice direct-spreading through earth communication system and method
  • Under-well bi-directional voice direct-spreading through earth communication system and method

Examples

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Embodiment 1

[0039] The downhole two-way voice direct spread communication system of the present invention comprises a ground TV transceiver 2, a ground loop antenna 1, a positioning device 4, a ground user data 25, an encoder 8, a PN code generator 11, and a ground spread spectrum modulator 10. D / A data converter 12, surface radio frequency interface 13, downhole radio frequency interface 18, A / D data converter 17, parallel / serial converter 16, spread spectrum modulator 15, downhole PN code generator 14, downhole user Data 26, bit error rate test module 23, downhole loop antenna 5, downhole TV transceiver 6, downhole handheld terminal 7, the reception of the direct spread communication system generally uses a related TV receiver, and is divided into two steps, namely despreading and demodulation . At the receiving end, after the received signal is amplified and mixed by the numerically controlled oscillator, the intermediate frequency signal is despread with the same and synchronized pseu...

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Abstract

The invention relates to a mine communication system, in particular to a mine bi-directional speech direct-sequence spread-spectrum and through-the-earth communication system and method relating to the spread spectrum technique. A terrestrial television transceiver of the mine bi-directional speech direct-sequence spread-spectrum and through-the-earth communication system is communicated with a loop antenna and a handheld terminal, and the handheld terminal is communicated with a positioning device. A mine television transceiver is communicated with a mine loop antenna and a mine handheld terminal. A direct sequence spectrum communication system is arranged between the terrestrial loop antenna and the mine loop antenna. By adopting the proposal, the invention has the advantages of anti-interference, multi-path and low interception rate due to the direct-sequence spread-spectrum digital wireless communication system and can be used for bi-directional speech through earth communications. The mine bi-directional speech direct-sequence spread-spectrum and through-the-earth communication system and method apply to accident warning and rescue in mineral enterprises.

Description

technical field [0001] The invention relates to a communication system in an underground mine, in particular to an underground two-way voice direct spread communication system and method using spread spectrum technology. Background technique [0002] Mine communication is responsible for the important tasks of mine production, safety, and scheduling, and plays a very important role in mine safe and efficient production, emergency rescue and disaster relief. Improving wireless communication systems in mines can help mines increase productivity and safety. [0003] Once a disaster occurs in the mine, emergency alarm, personnel evacuation, and ambulance team members looking for rescue targets all need to have a good communication system as a guarantee. However, in the event of a disaster, the usual wired communication channel may have been destroyed, which hinders the rescue team from contacting the trapped persons, resulting in the death of the trapped persons and significant...

Claims

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Application Information

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IPC IPC(8): H04B7/00H04B1/00
Inventor 周贤伟刘蕴络苗许娜黄秋香
Owner WESTERN MINING CO LTD
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