1. Customer needs:
Our school is an existing college with 6 student dormitory buildings, each building has 320 dormitory buildings. In order to strengthen the management of dormitory buildings, we now need to set up a broadcast call system for each dormitory building. The specific requirements are as follows:
1. The management room at the entrance of the dormitory building is the broadcast control room of the building. When someone wants to find a classmate in a dormitory, the control room can call this dormitory through the broadcast system, and the dormitory can control the control room. speak.
2. When a class or department needs to be notified, you can broadcast and broadcast the notification to the corresponding group of dormitories through the control room.
3. Get up early in the morning and automatically play relaxing background music to all dorms before turning off the lights at night to remind students that it is time to get up or go to bed.
4. In the event of an important or emergency event or important news, you can broadcast to each dormitory at the same time.
2. Demand analysis:
1. First, the school dormitory broadcast call system is designed as a constant pressure broadcast system. Each dormitory building has 320 dormitory buildings. Each dormitory is equipped with a 1.5W-3W speaker, with a total power of 960W, and a 1200W fixed voltage amplifier is required.
2. A daily use of student dormitory broadcasting is to find people by broadcasting, that is, it can be broadcast separately to each dormitory, that is, addressable broadcasting. Addressable broadcasting can not only realize fixed-point broadcasting, but also realize free group broadcasting. When calling, the called party must be able to answer, that is, the intercom function, we can divide the dormitory into several groups according to the department or class, when it is necessary to a certain class, a certain department, or a few classes When the dormitory is broadcasting, you can click the corresponding group to broadcast. When the members of each group change, you can modify it at any time through the main control software. The system design installs a GMTD-JXZQ in each dormitory. The address broadcast calls the intercom, each controller can realize the addressable broadcast and intercom function under the control of the main control system.
3. The main control system is composed of multimedia main control computer, communication controller and control management software, and automatic broadcast software. It mainly realizes the functions of fixed-point broadcasting, group broadcasting, and overall broadcasting. At the same time, it automatically broadcasts music ringtones, background music, etc. Features. The system adopts 485 bus control mode, which has the characteristics of long transmission distance and strong anti-interference. The computer control host has the characteristics of simple operation, convenient expansion, easy upgrade, and large broadcast capacity.
4. The system adopts bus-type wiring, the signal line is an audio line or a two-core power line, and the control line is a 4-core twisted pair. It is best to lay out a power line for the power supply of the device if possible. Unified management to increase double insurance for the stability of the system.
5. The school has a total of 6 dormitory buildings, each building independently design a set of broadcast call system. Therefore, if the number of dormitories in each building is the same, the equipment configuration and cost are also the same.
3. Main functions of the system:
? Auto play function
The system can automatically play radio exercises, eye exercises, national anthem, athlete march, preparatory music bells, class music bells, class music bells, wake-up numbers, background music, news and English teaching according to the schedule set by the school Programs and other optional radio music and programs in schools.
? Scheduled playlist
According to the teaching and management needs of the school, the system can pre-arrange the day and week playlists. The daily playlists can be set arbitrarily and are not limited by the time period and length of time. The day of the week will be judged automatically, and then automatically played according to the arranged playlist. Playlists can be stored, modified, and edited.
? Weekly circulation function
After arranging a week's play schedule, it can be played in a loop throughout the year without resetting every week.
? Large playback capacity
Thousands of ringtone music, various radio exercises, eye exercises, classroom music, various language teaching, English teaching programs, etc. can be stored in the computer to form a sound file material library for selection when arranging playlists, You can also play audio files on the disc.
? Set play identifier
Various play identifiers can be set according to the play content, such as class bell, class bell, inter-class exercise, and wake-up number, to facilitate identification of the playback content and playback file call.
? Play temporary radio
If the school has temporary broadcast content to be played, it can end the automatic play state at any time and enter the manual play state to play.
? Unattended
The broadcast control host can automatically switch on and off, automatically identify the day of the week after turning on each day, and then call the playlist of the day to automatically play, realizing unattended operation.
? Spot broadcast
The system adopts computer control, which can realize authorized broadcasting of any individual dormitory, such as: broadcast notice, find someone, etc.
? Group broadcasting, automatic playback
The system can divide all the broadcast points into several groups according to the demand, and perform manual broadcast and automatic playback on one or several groups.
? Call intercom
While calling a certain broadcasting point, the system can talk to the broadcasting receiving point to determine whether the listener hears and transmits the listener's speech sound to the broadcasting room.
? Overall system characteristics
The entire system is controlled by computer, and the wiring method is bus type. The system is simple to implement, flexible in control, and strong in stability.
4. List of system equipment (1 dormitory building):
5. System Topology
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