Exploring the design of intelligent building fire broadcasting system?

More and more large buildings are rising from the ground, and fire protection systems are particularly important in the face of fires. Combining the broadcast system with the fire protection system can effectively respond to sudden fires and minimize the losses caused by disasters. This article introduces the design of intelligent building fire broadcasting systems based on specific cases.

With the rapid development of science and technology this year, more and more intelligent technologies are applied in modern buildings, and intelligent integrated management has become an indispensable part of the normal operation of modern buildings. The intelligent fire broadcast system is an important part of intelligent integrated management. This article will specifically explain the design of the fire broadcast system based on cases. At present, there are many domestic enterprises engaged in intelligent fire broadcast system engineering, among which Guangzhou Dispu Company is the representative, which has successfully developed many fire intelligent broadcast system products. The most representative product of DSP is the DSPPA-MAG intelligent media broadcast center. This product has a high degree of centralization and complete engineering, and is worth learning from personnel in the industry. The center applies the world's most advanced integrated circuit technology and integrates background music, fire emergency broadcasts, and timing management functions into the fire protection system to achieve intelligent building management. In addition, this system contains a variety of module functions, and owners can choose according to their own needs. In terms of use, this system is characterized by simple operation and high degree of intelligence, which provides guarantee for the operation of the system. Below, a specific case is used to introduce the fire broadcast design process of intelligent buildings.

The effects achieved by 1DSPPA smart building fire broadcasting system

(1) Emergency broadcast priority; (2) Full area coverage alarm function; (3) Early warning broadcast can be inserted in emergency situations; (4) The fire control function is manual and automatic integration, and the broadcast area can be displayed in the control room.

2 Intelligent building fire broadcasting design basis

Each industry design has its own basis. The intelligent building fire broadcasting design basis is the "Fire Protection Bureau of the People's Republic of China and the Ministry of Public Security of the People's Republic of China". Design Specifications for Automatic Alarm Systems (Extract)" (GB50116-98). Combining the use requirements and economic requirements of the specific building, the best design plan is proposed, so that the building's fire broadcasting system can meet the requirements of national regulations and strive to reach advanced levels in various indicators of use functions. In order to realize this design idea, the following aspects need to be paid attention to.

2.1 Advancement and Scalability

Modern technology is changing with each passing day, and its development speed has exceeded our expectations. In view of the rapid development of modern science and technology, when designing the fire broadcast system, try to make the design scheme as advanced and scalable as possible. New technologies are constantly coming out, and new products are also appearing in front of people's eyes. Therefore, when designing a fire broadcasting system, you should first understand the investment situation of the system, and try to make the system reflect modern technology, especially advanced digital technology, as much as possible without exceeding the budget, so as to ensure that the system lasts as long as possible. Ensure that we are advanced within the time limit and will not be eliminated by society. Scalability means that the system can embed some pipelines and reserve a variety of interfaces, leaving operability for later function expansion of the system. This can first make the system more cost-effective, and secondly, it can also save Party A money on subsequent upgrades.

2.2 Scientificity and Standardization

In the fire broadcast system, the broadcast system is different from the ordinary sound system. It is more advanced and complex than the sound system. Therefore, the design plan of the system must be strictly reviewed in accordance with the relevant norms and standards formulated by the country, and the construction process of the system must be strengthened. This series of work must meet high standards. After passing the acceptance, all the data during the system testing process and construction drawings and other materials should be handed over to Party A for sorting and archiving to prepare for later maintenance and repair work.

2.3 Safety and Reliability

The public broadcasting system is an important part of the fire protection system. The use of this system will directly affect the operation of the entire fire protection system. It will directly affect the entire intelligent building, personnel's life and property safety, so safety and reliability are the root of the system's design goals. In this design scheme, a relatively mature fire broadcasting system product in China is used. During the construction process of the system, core tasks such as laying lines and installing equipment were strictly controlled, and the debugging of the system was also ensured to be foolproof. In the later operation work of Party A, professional operators will be strictly selected and professional training will be strengthened to meet the safety and reliability requirements of the fire broadcasting system.

The equipment selected for this program is also selected from companies that have passed national quality certification, and we fully support the later maintenance and after-sales work of the system.

3 Design ideas and achieved results

The entire building is composed of 16 zones, including guesthouses, hotels, KYV and other functions. Party A requires that the fire broadcasting system cover the entire building. In response to this situation, we first understood and analyzed the construction drawings and on-site conditions of the building, and then divided the areas based on the building's use functions. First, a remote-controlled microphone is set up in the manager's office of the building. The manager can make voice notifications to various partitions of the entire building from his office. Considering the use function of the partition, 64 square meters are divided into one unit, and each unit is equipped with a ceiling speaker. Distinguished by the size of the flow of people, the power of ceiling speakers in places with small flow of people is 3W, and the power of ceiling speakers in places with large flow of people is 6W, ensuring that the power consumption is reduced while ensuring that the functions are met. The building's fire emergency broadcast system is an integrated switching method between manual and automatic.

(1) Under normal circumstances, the speaker is used as a normal music playback function, and in an emergency, it is used as a fire warning and person-finding information broadcast function. At this time, you can switch manually. (2) For unattended times such as at night, the system can be set in chronological order to play music regularly or tell time on time. The fire broadcast switching principle of this building is to ensure the priority of alarm broadcast in emergency situations. Therefore, after the fire sensor system transmits the signal, the broadcast system immediately stops the previous work and switches to the alarm broadcast working state. The fire switching of DSPPA intelligent system includes the following centralized switching methods. (1) Full cut: When an emergency such as a fire occurs in any area of ??the building, the entire floor broadcast system where the incident occurred will start to broadcast the alarm. At the same time, the floors where the incident did not occur will also stop playing the previous background music and start broadcasting the warning content. . (2) Partial switching: Different from full-scale switching, in the event of an emergency, not all the broadcast systems of the floors are switched to alarm broadcasts, but only the broadcast systems of adjacent floors are switched to alarm broadcasts, while other floors are switched to alarm broadcasts. The broadcast system still plays background music and other content. The principle of this switching method is that the signal from the fire equipment sensor on the floor involved is only transmitted to the relevant floor, thereby initiating control of the broadcasting equipment. The remaining floors that did not receive the signal operated normally.

4 Fire broadcast and background sound

(1) Three-wire system If the power of all background sound broadcasts is not very high, a three-wire system can be used. Background broadcast and fire broadcast are fully compatible ,The system schematic diagram is shown in Figure 1. The fire broadcasting system adopts a bus system and is completed by strong current workers; weak current workers are only responsible for the design of the background sound system in the broadcast room and leading the lines to the fire linkage control module. Advantages of this system: ① The circuit is simple, using a bus system, using public and neutral lines, and the entire broadcast trunk system only needs three lines. ②The background audio broadcast and fire broadcast are fully compatible, saving equipment investment. Disadvantages of this system: ① The system is not flexible enough and the background sound must be broadcast together. ② Background sound broadcasting cannot be carried out in places where fire broadcasts are not installed, such as bathrooms. ③Tuning and switching operations cannot be performed on this floor. (2) Multi-line system (separate from fire lines) If the background sound of the building needs to be controlled by floor, and the background broadcast is still controlled by the fire broadcast, the system schematic diagram is shown in Figure 2. The fire broadcasting system still adopts the bus system and is completed by strong current workers; weak current workers are responsible for leading the background sound system and lines in the broadcast room to the fire linkage control module.

5 Conclusion

Whether the design of a building’s fire broadcasting system is reasonable will directly affect the later operation of the building. When designing the fire broadcasting system, the relevant national regulations should be strictly followed. Under the conditions of meeting various provisions, in cooperation with other professional constructions, and in accordance with the specific requirements of the owner, the system should be guaranteed to be advanced for as long as possible in the future, and strive to maximize the cost-effectiveness of the system.

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