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1. Customer needs:
Our school has a total of 54 grades in nine grades of primary and secondary schools. There are 5 classes in each grade of primary school and 8 classes in each grade of middle school. Now we need to build a broadcasting system. Specific requirements are as follows:
1. Each grade can be broadcast separately, the playground must have a broadcasting system.
2. There are different schedules for the primary school and the middle school. There is one lesson at 40 minutes in the primary school and one lesson at 45 minutes in the middle school.
3. The third grade of the middle school requires early self-study time, and can listen to the English listening training courses of different grades at the same time.
Please design a plan and list the equipment.
2. Demand analysis:
1. Each grade can be broadcast separately. This system is designed as an intelligent constant pressure zone broadcasting system. There is a zone for each grade and a playground for a total of 10 zones.
2. The elementary school and middle school have different schedules for rest and rest. To achieve music ringtones and automatic playback, it is required that the front of the system has 2 sets of digital automatic broadcast audio sources. The system can broadcast 6 sets of digital audio programs at the same time, and realize automatic broadcast control.
3. The third grade of the middle school requires listening to different programs at the same time. It is necessary to equip each area with a power amplifier and different program sources. Here mainly for listening tests and listening training, so the program source can use multi-channel digital broadcasting Other digital broadcast sources in the broadcast control system (master control system).
4. Each classroom is equipped with a 5W passive speaker
A total of 30 speakers are needed in 30 classes in the elementary school, with a total power of 30 * 6 = 180W
There are 8 classes in each grade in the middle school, and the total power required for each grade is 8 * 6 = 48W
The standard playground (including the 400-meter standard runway) needs to be equipped with six 60W outdoor sound columns, and the total required power is 60 * 6 = 360W
5. According to the number of speakers and sound column, and the demand for broadcasting function, this system needs to be equipped with 5 power amplifiers
Primary school needs to be equipped with a 260W constant voltage power amplifier
The middle school department is equipped with three 70W constant voltage power amplifiers to ensure that different grades can listen to different programs at the same time
The playground is equipped with a 460W power amplifier
3. Main functions of the system:
※ Multi-channel digital audio broadcast
The system can broadcast 2-6 sets of digital audio programs at the same time, which has been satisfied for many years. Multilingual teaching is conducted simultaneously, and different programs are played simultaneously in different areas.
※ Multi-channel automatic playback
Each channel can be automatically played according to the pre-arranged playlist, and it can be played regularly to achieve personalized broadcasting in different areas. For example, the school hours of the elementary school and the middle school are different, and each can realize the music ringtones, radio exercises, and music between classes in the area.
※ Scheduled playlist
According to the needs of teaching and management, each channel can be scheduled for one day and one week of playlists. The playlist of each channel can be set arbitrarily, not limited by the time period and length of time. , The system will automatically judge the day of the week, and then each channel will automatically play according to the arranged playlist.
※ Weekly circulation function
After each channel arranges a week's play schedule, it can be played in a loop throughout the year without resetting every week.
※ Set play identifier
Each channel can set various types of playback identifiers according to the playback content, such as class bell, class bell, class operation, etc., wake-up number, etc., to facilitate identification of playback content and playback file calls.
※ Unattended
The multi-channel digital broadcasting host can realize automatic power-on and power-off, automatically identify the day of the week after power-on, and then each channel calls the playlist of the day to automatically play, realizing unattended operation.
※ Music track library
The multi-channel digital broadcast control system has a built-in large-capacity music track library and rich ringtone music, which can fully meet the various needs of the school.
※ Multi-channel digital broadcast real-time monitoring
The system control software can monitor the playback status of each channel in real time, audio output instructions, music file playback progress, music file length, elapsed playing time, etc., so that the system administrator can control the system's working conditions.
※ All areas play automatically
Through the setting of the control software, all areas are automatically played, such as campus radio programs, music between classes, etc.
※ Play separately for specific areas
Personalized broadcasting of a certain area through software control, such as the opening of a parent meeting in a certain grade; according to different grades, the length of different courses in different courses is different, and the music is ringing.
※ Free combination play in each area
Through the software settings, it is possible to arbitrarily broadcast certain areas, such as the unified broadcast of the middle school department of the school, and the lunch break to play background music in the cafeteria, dormitory, campus, etc.
※ Select area for temporary broadcast
The system can manually select areas for temporary broadcasts as needed, such as the principal's speech, broadcast announcements, important news, etc.
※ Play different content in different areas at the same time
When different amplifiers are configured in different regions, different content can be played in different regions at the same time, such as: English listening exams in different grades at the same time.
The constant pressure zone broadcasting is realized by means of physical division. If the zone broadcasting mode realizes that different grades can listen to different programs at the same time at the same time, it is necessary to equip each zone with a power amplifier. This method is more economical. If there are more areas, the front end of the system is more complicated and huge, and the sound source switching is more troublesome. In this case, it is relatively simple to use the addressable FM broadcasting system.
4. List of system equipment
Project name Specifications Quantity Main control system GMTD-BCD multi-channel digital playback control host, communication control card, multi-channel automatic playback software,Partition control software, which can output 6 digital audio programs at the same time 1 Partition controller GMTD-8DV 2 Constant voltage amplifier GM-8260A (260W) 1 Constant voltage amplifier GM-8070A (70W) 3 Constant voltage amplifier GM-8460P (460W) 1 Broadcast cabinet 1.8 meters, 19 "steel 1 microphone BK-240 5 audio program source deck, CD player, DVD player, AM / FM tuner, etc., users can choose according to actual needs
Passive speaker GM-351 (3W / 6W / 10W wall-mounted) 54 outdoor sound column GM-418 (40W / 60W outdoor rainproof sound column) 6 cable wire network cable, audio cable, connector, etc.
5. System Topology
Bamboo Outdoor Decking ,Bamboo Deck Boards,Outdoor Bamboo Flooring, Outdoor Bamboo Decking
ZHEJIANG JIAHE BAMBOO TECHNOLOGY CO., LTD , https://www.zhuart-bamboo.com