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Solution of Factory Digital IP Network Broadcasting System

Plant Public Address System-Scheme Construction

System Overview:
In order to strengthen the management of the factory and create a comfortable and relaxed working environment, many modern enterprise factories have the need to build and transform a set of IP network broadcasting system, including factory fire safety, production scheduling and daily management of the factory, which is conducive to the improvement of the factory's usual work efficiency and the improvement of daily management. At the same time, the factory IP broadcast can play background music and commuting ringtones regularly to create a good working atmosphere, which can relax the tension and eliminate fatigue. In addition, in the outdoor activity area of the factory, most of them are mobile people. IP broadcasting of the factory can mainly realize the notification of playing background music and some work information.


Demand analysis:
Requirement 1: For different areas of the factory, different audio sources can be played in different areas.
Requirement 2: The leading office shall set up a remote call intercom microphone and directly access the switch to realize the management of broadcasting tasks in the whole factory area and the intercom function. A telephone is configured to be connected to the network host to realize long-distance regional broadcasting and regional broadcasting, which can control point broadcasting, external telephone paging broadcasting and internal paging broadcasting.
Demand 3: Powerful fire control function, in the event of a fire accident, can alert the whole district or partition, avoid casualties of factory staff and employees, and improve the safety of the factory.


Design ideas:
According to the factory's demand for the use of the broadcasting system, the broadcasting system adopts the IP network broadcasting system based on the mall network mode for transmission and control. The network broadcasting system solves the problems of large and wide area of the mall and difficult broadcasting transmission. Through the transmission of the mall network, the above problems are well solved and the audio quality of the mall broadcast is ensured. The sound quality clarity: the sampling rate reaches 44.1kHz -96kHz, and the microphone/collector reaches: 32k. Stable and reliable network broadcast directly depends on the network server and network adapter hardware and software combination of good performance.
According to the requirements of China's fire protection system specification, the fire protection broadcasting system of multi-storey and high-rise buildings must be a broadcasting area. To this end, we in the design of the factory's public address system, but also must comply with the relevant provisions of the broadcast by the floor zoning.
Considering that the use functions and requirements of each floor and area of the factory are different, the public address system should be equipped with volume controllers with independent volume adjustment functions for all floors, areas and office rooms. In order to meet the requirements of fire broadcasting, all volume controllers shall have emergency switching (forced switching) function to ensure maximum volume broadcasting in fire emergency broadcasting state.
According to the requirements of China's fire protection system specifications, the factory is an important place for fire protection. Therefore, it is necessary to set up a fire protection interface unit inside the public broadcasting system, so that when the broadcasting system is closed, in case of emergency, the whole system can automatically start up and automatically enter the emergency broadcasting state to carry out fire emergency broadcasting in the accident area.


Functional advantages:
Different areas play different music, using the main server software timing or studio function, to each area broadcast the corresponding notice.
The sub-control points such as the duty room and the front desk are equipped with sub-control software and paging microphones. To realize a central multi-control point, multiple managers to maintain or manage the order of the mall.
The fire management system is equipped with a fire collector. When the fire signal is input to the fire interface unit, the fire interface unit will trigger an alarm task to alert employees to evacuate in time and protect their own safety.


Application effect:
1. The control center of public broadcasting is set up in the fire control room/broadcasting room, and the IP network broadcasting system server is set up in the control center. The system server is the core equipment, which mainly controls the broadcasting paging and background music playing of the whole system. Provide high-quality background music, including CD player, tuner, PC player, etc, through the control software for file playback, temporary broadcast, set up timing broadcast, the establishment of music library, set up daily background music playback and other functions, the software uses a password login to ensure system security.
2. Auxiliary equipment of the control center: the computer room is equipped with a network broadcast addressing wall-mounted sound box, which is used as the monitoring sound box of the computer room. Through the control of the server software, the monitoring sound box can be used to monitor the program playing content and playing volume of each area in the front end. As the auxiliary audio source equipment of the system, the preamplifier integrates the audio sources of digital players and digital radios, and can play to each partition or all broadcasting areas through the acquisition and broadcasting of broadcasting software. In addition, a broadcasting microphone is configured for emergency broadcasting and broadcasting speech in emergency situations. In addition, a fire-fighting interface unit is installed to facilitate the access of fire-fighting signals and can be forced to switch to the fire-fighting emergency broadcasting state in emergency situations, the fire alarm of any area can be set at will to realize the fire linkage. As a power supply sequencer for system auxiliary equipment, the power supply can be turned on or off sequentially to protect the equipment.
3. Install a color screen touch broadcasting system paging microphone in the control center, which can page and broadcast each area. The broadcasting mode can be broadcast in a single area or multiple areas.
4. Set up a broadcasting system cabinet-type decoding terminal and a power amplifier in each area to be responsible for the broadcasting of programs in the area. The broadcasting system cabinet-type decoding terminal in each area mainly decodes and plays the control signal and audio signal from the main control server in real time, converts the digital audio signal into an analog audio signal, transmits it to the power amplifier, and finally transmits it to the front-end speaker for playback by the speaker; at the same time, it has the power amplifier power management function and local broadcasting function, which can ensure that when the power amplifier does not work, it can automatically stop power supply and prolong the service life of the power amplifier. The cabinet-type decoding terminal of the broadcasting system itself does not have a power amplifier and needs to be connected to the power amplifier.
5. According to different functional requirements, the design of each floor is divided into different areas, mainly divided into room area, corridor public area and lobby area. Each area is equipped with a certain number of ceiling loudspeakers to be responsible for the background music broadcasting system of the area. The underground garage area is divided into separate zones. Considering the aesthetic problems, ceiling loudspeakers are used to cover this area.
Outdoor area: The outdoor waterproof sound column is designed in the outdoor open-air area, and it is also independently partitioned to meet the requirements of outdoor broadcasting and sound reinforcement. The speakers in all areas can normally play background music at ordinary times. When an emergency fire alarm occurs, they can automatically switch to the fire broadcasting state, which meets the needs of background music and realizes fire linkage. It also realizes that the public broadcasting of background music and the fire emergency broadcasting system share the same terminal speaker.

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