First, the user needs

Due to the geographical conditions of our province, contains a wealth of mineral resources in the province, there are nearly more than and 300 kinds of mining areas, such as gold, coal, etc.. Under the guidance of governments at all levels, the mining area provides protection for national energy security. In order to ensure the safety of personnel and production safety in mining area, it is proposed to construct a set of mine emergency network broadcasting system in mining area, which can meet the needs of the mining area. Now take a coal mine as an example, design a broadcast system.

There are 5 underground mines in a coal mine, each mine has a total of 6 working face, the length of each working surface is 200 meters. Requires the installation of the broadcast system, functional requirements are as follows:

(1) in the case of an emergency, the main control room can be broadcast to each working plane of each mine by the broadcasting system, that is, the broadcasting of the point to point, and the response of the staff can be obtained through the broadcasting system.

(2) in case of emergency, the staff on any working face can call the main control room via a remote network, and let the local emergency call be heard.

(3) the main control room to call the plane at the same time, each working plane will provide a 220V power supply, driving the local red lights flashing, to prevent excessive noise because of the work surface, people can not hear the alarm.

(4) the underground mine operation environment, humidity, and corrosive water requirements. In the selection of equipment to fully consider moistureproof, acid.

(5) to work on the daily work of all the work area to play ringtones and news programs.

(6) the internal network optical fiber has been laid into each working area. The system requires transmission through the network, requiring clear voice transmission without stagnation.

Two, needs analysis and design

1, according to the actual situation can be learned from the main control room is far from the terminal, and radio terminal distribution, so the system adopts the network broadcasting system, using IP as the digital broadcasting network LAN mode data transmission platform, to solve the problem of transmission distance, while reducing the cable laying, greatly reduced cable cost and construction cost.

2, the radio can not only realize fixed-point broadcast, also can realize free packet broadcast at the same time, when the call, the called party responded to, when the points need report, should be a key paging. This is the main control room intercom function, in order to improve the response speed, timely notification in place, we are in demand paging when using the keyboard, press the way. System design in each working industry to face the installation of a HM-01DJ digital network VOD intercom terminal, each demand terminal, through the network, a call control room. The intercom function easily.

3, the main control system by Haman IP network main control computer, IP control software, automatic broadcast software, call center, network monitor intercom, intercom, emergency call main point broadcast function, and automatically broadcast music ringtones, background music and other functions.

4, the length of each working face is: 200 meters, considering the underground environment particularly wet, and the corrosive environment is serious, we should choose the treble horn, horn and main material for strengthening resin plastic each working plane, install 6 30W horn loudspeaker, each working face power: 240W, with 360W put a table. There are five mining area, mine. A total of thirty working face. The design configuration according to the first working face the same.

5, taking into account the underground environment is very bad, we are considering placing equipment, the first should focus on moisture. In this regard, we customized special cabinet, the power amplifier equipment into the cabinet, and the cabinet filled with desiccant, to achieve the purpose of moisture.

6, in each working face, install lights, lights controlled by the power network terminal, when the broadcast, lights will blink to alert the purpose.

Three, the main function of the system

1, emergency intercom: can be in the main control room, leading the office, under the mine, such as the work of the plane to carry out the remote broadcast speech, and call intercom.

2, regularly broadcast radio programs or broadcast host programs within the host broadcast.

3, the broadcast system to achieve the control point of the broadcast point of the volume adjustment; Broadcast Center for any playback point of the monitoring system in the case of power off network with the ability to recover.

4, emergency broadcast and warning lights linkage, not only people can hear. Also let people see, in order to fully inform the person in place.

5, equipped with audio programs: a rich source of CD, cassette, and other types of tuner playback devices to broadcast in real-time system.