Multi-service wireless communication system for coal mine

Abstract

The invention discloses a multi-service wireless mine communication system for a coal mine, comprising surface equipment and underground equipment, wherein the surface equipment is an information monitoring center and consists of a monitoring host, an IP / PBX voice switch, a wireless switch, a switch, a dispatching machine, a public switched telephone network, a mobile phone and a notebook; the monitoring host, the IP / PBX voice switch, the wireless switch, the switch, the dispatching machine and the public switched telephone network are connected through cables or net wires, and a standardTCP / IP protocol is utilized for transmission; the underground equipment comprises a base station, a controller, a power supply, the mobile phone, an identification card, a monitoring and control substation, a sensor and an explosion-proof video camera; the surface equipment and the underground equipment are connected to corresponding controller optical ports through optical cables, the controller is connected to the base station by cables or optical cables according to distances, the base station is connected with a monitoring substation or the explosion-proof video camera by cables, the mobile phone or the identification card is in wireless communication connection by utilizing an IEEE802 protocol family. The invention has the functions of voice communication, personnel location, videomonitoring, gas monitoring, data transmission and the like at the same time.

Description

technical field [0001] The invention relates to a communication system, in particular to a coal mine multi-service wireless communication system. Background technique [0002] In recent years, with the country's promotion of "digital mines", the communication conditions and automation level of coal mines have been greatly improved. The wireless communication system in coal mines is gradually emerging. The underground communication equipment has evolved from the original explosion-proof telephone to the now widely used mobile communication system. Users can carry mobile phones to communicate and arrange work anytime and anywhere. [0003] The earliest wireless communication was "leaky communication" (see figure 1 ), which is the prototype of wireless communication. Its appearance has made "mobile calling" a reality, and more coal mines have more convenient communication tools. [0004] "Leaky communication" mainly consists of three parts: ① transmission medium (leaky cable...

AI Technical Summary

Problems solved by technology

[0008] ③Broadband, but the signal is easily interfered;

[0009] ④ The signal attenuates sharply with the depth of the roadway, especially not suitable for use in large and medium-sized mines;

[0010] ⑤"Bus type" signal coverage, "offline" users are vulnerable to disconnection, signal attenuation and other factors;

[0011] ⑥ The function is simple, and it is impossible to realize functions such as underground personnel positioning

[0015] ①The system is huge and can accommodate many users, but the cost is quite high, and it is only suitable for use in large and medium-sized mines;

[0018] ④The construction is complex and requires high maintenance personnel;

[0019] ⑤ It can only be used for voice communication, not suitable for the expansion of additional functions such as underground personnel positioning

[0021] The above two main wireless communication methods cannot meet the increasingly high technical requirements of coal mining enterprises.

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