Overview and Demand A new school in a city has a new school building. There are one teaching building, 40 classrooms, 10 offices and one 400-meter runway playground. The school shall establish a broadcasting system. The pipelines have been pre-buried in the construction of the teaching building. The broadcasting signal lines have reached the classrooms of various classes. Specific requirements are as follows:
It can realize the music ring tones of the class, automatic play, and the news and background music can be played during the rest time.
It can realize individual broadcast, broadcast notice or any group broadcast to each classroom.
When the classroom position of each grade is adjusted, a group of grades can still be broadcast in any combination.
Offices, corridors and outdoor playgrounds can realize zone broadcasting or any area combination broadcasting.
The national anthem, radio gymnastics and other programs can be played remotely in the playground.
The scheme design is based on the above requirements of the school, and the system is designed as a combination of one-line intelligent addressing broadcasting and district broadcasting. Realize the function of zoning control and point-to-point control without changing the broadcast line.
Audio source design: digital audio source, DVD player, deck, digital tuner, microphone and other analog audio sources output from the main control computer.
Control design: The control design uses a main control computer and a set of addressable broadcast main control software, which can control the addressing broadcast in the classroom and the broadcast in the public area.
Amplifier design: one indoor and outdoor power amplifier, which can independently adjust the volume of indoor and outdoor areas, making the design of the broadcasting system more reasonable. The actual power is calculated based on the number of indoor and outdoor speakers designed, while considering the power loss of the line, the equipped power amplifiers have redundancy.
Addressing design: In order to meet the school's point-to-point broadcasting and classrooms can be arbitrarily grouped and combined broadcasting requirements. Design each classroom to install an addressing controller GMTD-XZQ and a speaker GM-356.
Speaker design: office design wall-mounted speaker GM-356, corridor design ceiling speaker GM-513, playground design outdoor rain and moisture-proof sound column GM-418.
Spot broadcast:
The system is set by the main control software, which can broadcast to any broadcast receiving terminal, and can broadcast to any classroom individually.
Group broadcasting:
The system can arbitrarily group broadcast to all broadcast receiving points, such as English listening test for certain classes.
Free zone broadcasting:
The system can arbitrarily form different areas for broadcasting. For example, when the classrooms of each grade are changed, the broadcast can be re-zoned according to the changed classrooms.
Installation is quick and easy:
The system is realized by a reliable power carrier mode. The broadcast addressing terminal does not need a separate power supply, and the control signal and constant voltage signal are transmitted through the same cable, which greatly saves the installation cost.
Easy to upgrade and expand:
No need to readjust the original broadcast line, directly access the one-line addresser, you can easily achieve addressing broadcast.
Should be acute:
If a terminal in the system is abnormal, you only need to close the signal control host in the control room, and the system automatically returns to the normal broadcast state to ensure the smooth progress of the broadcast.
System topology
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It can realize the music ring tones of the class, automatic play, and the news and background music can be played during the rest time.
It can realize individual broadcast, broadcast notice or any group broadcast to each classroom.
When the classroom position of each grade is adjusted, a group of grades can still be broadcast in any combination.
Offices, corridors and outdoor playgrounds can realize zone broadcasting or any area combination broadcasting.
The national anthem, radio gymnastics and other programs can be played remotely in the playground.
The scheme design is based on the above requirements of the school, and the system is designed as a combination of one-line intelligent addressing broadcasting and district broadcasting. Realize the function of zoning control and point-to-point control without changing the broadcast line.
Audio source design: digital audio source, DVD player, deck, digital tuner, microphone and other analog audio sources output from the main control computer.
Control design: The control design uses a main control computer and a set of addressable broadcast main control software, which can control the addressing broadcast in the classroom and the broadcast in the public area.
Amplifier design: one indoor and outdoor power amplifier, which can independently adjust the volume of indoor and outdoor areas, making the design of the broadcasting system more reasonable. The actual power is calculated based on the number of indoor and outdoor speakers designed, while considering the power loss of the line, the equipped power amplifiers have redundancy.
Addressing design: In order to meet the school's point-to-point broadcasting and classrooms can be arbitrarily grouped and combined broadcasting requirements. Design each classroom to install an addressing controller GMTD-XZQ and a speaker GM-356.
Speaker design: office design wall-mounted speaker GM-356, corridor design ceiling speaker GM-513, playground design outdoor rain and moisture-proof sound column GM-418.
System functions
Timed automatic play:
The system can set up the full-automatic playing of ringtones for class music, radio exercises, English listening training courses, etc. through the main control software according to the schedule set by the user.Spot broadcast:
The system is set by the main control software, which can broadcast to any broadcast receiving terminal, and can broadcast to any classroom individually.
Group broadcasting:
The system can arbitrarily group broadcast to all broadcast receiving points, such as English listening test for certain classes.
Free zone broadcasting:
The system can arbitrarily form different areas for broadcasting. For example, when the classrooms of each grade are changed, the broadcast can be re-zoned according to the changed classrooms.
Installation is quick and easy:
The system is realized by a reliable power carrier mode. The broadcast addressing terminal does not need a separate power supply, and the control signal and constant voltage signal are transmitted through the same cable, which greatly saves the installation cost.
Easy to upgrade and expand:
No need to readjust the original broadcast line, directly access the one-line addresser, you can easily achieve addressing broadcast.
Should be acute:
If a terminal in the system is abnormal, you only need to close the signal control host in the control room, and the system automatically returns to the normal broadcast state to ensure the smooth progress of the broadcast.
System topology
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