Campus First Line Addressing Broadcasting System: Chaoyang Experimental School
ã€School Profile】
Mr. Zheng Liping, a representative of Shantou Municipal People's Congress, a member of the Standing Committee of the Chaoyang District People's Congress, and a well-known private entrepreneur, founded the kindergarten in January 1998 with the aim of “recruiting and educating talents and repaying the societyâ€. On this basis, he actively prepared to build primary and secondary schools. In 2000, the Chaoyang Experimental School was completed and opened. The school adheres to the work idea of ​​“consolidating and improving, steadily developingâ€, solidly laying the groundwork, laying a solid foundation, step by step, and stepping up to a new level every year, becoming a well-known private school. In 2003, the school was rated as the first-class school in Guangdong Province, the first top ten private school in Guangdong Province, and the national advanced private school.
[Overview and needs]
The Chaoyang Experimental School of Shantou City has a new campus. There are 2 teaching buildings, 150 classrooms, 30 offices and a 400-meter runway playground. The school should establish a broadcasting system. The pipeline has been pre-buried in the construction of the teaching building. The broadcast signal line has arrived at each classroom, requiring peer-to-peer broadcasting and zone broadcasting functions without changing the line. Specific requirements are as follows:
Ø It can realize the music ringtones of the class, automatically play, and play news and background music during the break time.
Ø It can realize separate broadcast, broadcast notification or arbitrary group broadcast for each classroom.
Ø When the position of each grade classroom is adjusted, you can still broadcast a group of grades in any combination.
Ø Office, corridors and outdoor playgrounds can implement zoned broadcasts or combined broadcasts of any zone.
Ø It can realize the remote play of national anthem and radio gymnastics in the playground.
ã€Design】
According to the above requirements of the school, the system is designed as a system that combines intelligent addressing broadcast and zone broadcast. Partition control and point-to-point control are implemented without changing the broadcast line.
Ø Sound source design:
The digital audio source, DVD player, deck, digital tuner, microphone and other analog audio sources output by the host computer.
Ø Control design:
The control design uses a master computer and a set of addressable broadcast master control software, which can control the addressing broadcast of the classroom and also control the broadcasting of the public area.
Ø Amplifier design:
Each amplifier is equipped indoors and outdoors, so that the volume of the indoor and outdoor areas can be independently adjusted to make the design of the broadcasting system more reasonable. According to the number of indoor and outdoor speakers designed to calculate the actual power, while taking into account the line power loss, the power amplifier is equipped with redundancy.
Ø Addressing design:
In order to meet the school's peer-to-peer broadcasting needs and classroom arbitrarily grouped and combined broadcast requirements. Design one classroom speaker GMTD-PLC for each classroom.
Ø Speaker design:
The office is designed to address wall-mounted speakers, the corridor design ceiling speaker GM-513, and the playground design outdoor rain-proof and moisture-proof column GM-418.
[Gmtd first-line addressing broadcast system function]
Ø Timed automatic play: The system can set the automatic music play ringtones, radio exercises, English listening training courses, etc. through the main control software according to the schedule set by the user.
Ø Fixed-point broadcasting: The system can be broadcast to any broadcast receiving terminal through the setting of the main control software, which can be broadcast separately to any classroom.
Ø Group broadcast: The system can arbitrarily group broadcasts for all broadcast receiving points, such as English listening test for certain classes.
Ø Free partition broadcast: The system can arbitrarily form different areas for broadcasting. For example, when the classrooms of each grade change, the broadcast can be re-partitioned according to the converted classroom.
Ø Installation is simple and fast: the system is implemented by means of reliable power carrier. The broadcast addressing terminal does not need separate power supply, control signal and constant voltage signal are transmitted together, which greatly saves installation cost.
Ø Easy to upgrade and expand: It is easy to implement addressing broadcast without re-adjusting the original broadcast line and directly accessing the one-line addresser.
Ø Emergency: If an abnormality occurs in a terminal in the system, simply turn off the signal control host of the control room, and the system automatically returns to the normal broadcast state to ensure the smooth progress of the broadcast.
l system topology
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