KT456 Mining Broadcast Communication System
Patent numbers: ZL201210234190.4, ZL201220327887.1, ZL201220327886.7, ZL201220327193.8

1. Product Overview
The broadcasting communication system is based on Ethernet network and uses TCP/IP protocol to transmit digital audio;
The system adopts "photoelectric" transmission: underground switches are transmitted to sub stations using mining optical cables, while sub stations are transmitted to speakers using mining shielded cables;
The main control part of the broadcasting communication system is installed in the ground dispatch center, which is the highest authority of the entire broadcasting system;
The substation is generally installed in areas with concentrated underground pedestrian flow, such as underground dispatch centers, waiting yards, central substations, and other areas;

2. Main functions
● Emergency dispatch command
It can be controlled in conjunction with the telephone scheduling system to achieve telephone scheduling and command of digital network broadcasting, as well as "regional broadcasting";
The ground dispatch center can achieve "emergency broadcasting throughout the area" and "zone broadcasting" in different areas;
The sub station can conduct on-site broadcasting underground.
● Underground emergency one click call
Press the "emergency call" button on the substation, immediately connect to the broadcasting control station of the dispatch center, and report the underground situation in a timely manner.
● Bidirectional intercom
Bidirectional intercom can be achieved between the broadcasting control station and sub stations, as well as between sub stations.
● Monitoring function
Environmental monitoring of any substation can be carried out in the dispatch center.
● Recording function
The intercom and voice broadcast content in the broadcasting system is automatically recorded and saved in the default folder of the system through the upper ● computer software. Users can use the
The recording management system software downloads and saves its files to the specified folder.

3. Auxiliary functions
◆ It is possible to set IP addresses for the broadcasting control station and sub stations within the broadcasting system, and can freely combine and partition equipment terminals such as sub stations;
◆ Through industrial control PCs, background music playback, voice broadcasting, and timed ringing can be carried out for each zone or the entire area;
◆ Real time acquisition and broadcasting of external audio sources (such as broadcasting programs of the Central People's Broadcasting Station) can be achieved through network collection terminals;
◆ Receive alarm signals from other systems through network alarm terminals and automatically broadcast specific content to designated areas;
◆ Can remotely manage and control the volume and power of equipment in the broadcasting system;

4. Technical indicators
◆ Ground to underground substation: The farthest transmission distance using mining single-mode optical cable is 20km;
◆ Sub stations and underground network switches: using mining network cables with a maximum transmission distance of 100m; The farthest transmission distance using mining single-mode optical cable is 20km;
◆ From the substation to the rear speaker: The transmission distance using a 2-core shielded cable is ≤ 1km.

5. Configuration requirements

6. Device structure diagram

Substation connection to underground ring network
◆ The substation can directly connect to the underground ring network switch.
◆ When the distance from the ring network switch is ≤ 100m, use a mining network cable to connect.
◆ When the distance from the ring network switch is ≥ 100m, mining single-mode optical cables should be used for connection.

Fiber optic cable connection for substation - tree layout
◆ A single substation needs to occupy 1 core optical cable.
◆ The number of cores in a multi-core main optical cable is greater than or equal to the number of sub stations.
◆ The multi-core main optical cable is directly connected to the ground switch and connected to the substation using the fiber optic cable reel box branch.
◆ This method is suitable for situations where there are many branch tunnels, multiple sub stations, or no underground ring network.

分站的光缆连接—级联式布置
◆ As shown in the figure, the substation is connected to the ground switch and underground ring network switch using a mining optical cable as a whole.
◆ Each substation is equivalent to a node, and a mining optical cable can connect up to 8 substations.
◆ This method is suitable for situations where there are fewer branches, longer extensions, and fewer sub stations in the roadway.

Fiber optic cable connection for substations - cascaded layout
◆ As shown in the figure, the layout of the substation combines two methods: tree and node.
◆ This method is suitable for situations with multiple levels, multiple branches of tunnels, and multiple sub stations.

Layout of speakers
◆ The speaker is connected to the substation through shielded cables (allowing for multiple branch connections);
◆ The transmission distance from the substation to the subsequent terminal is ≤ 1km. When there are multiple branches, the longest branch distance is calculated;
◆ The total load of rear speakers at the substation is ≤ 8 units.

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