With the healthy development of the Chinese people’s income, the development of the western region and the process of urbanization in China are gradually accelerating. With the acceleration of urbanization, the intelligentization of high-rise buildings has become another new bright spot in the field of automatic control. However, from the start of China's entry into the intelligent building industry, nearly 80% of China's high-rise building intelligent projects use foreign monitoring configuration software as a platform. I have been engaged in intelligent building projects for nearly eight years. The reasons for the analysis are mainly two aspects: First, foreign software (such as EXCEL5000, WINCC, etc.) is longer than domestic software in the use of time, and its stability and function are excellent. In domestic software; Second, foreign software has its own hardware integration product, its hardware and software can be well combined, and the intelligent engineering of the building has a high investment risk (generally accounts for about 5% of the cost of civil construction). Therefore, domestic software is rarely used in the intelligent engineering of high-rise buildings. However, because the building intelligent system belongs to a lag system, the control accuracy is not as demanding as the process control. Considering the project cost, after reaching a consensus with the developer to build a domestic intelligent building project using domestic hardware and software, our company proposed the following solution to the developer. The traffic building in this case study is located in a city center of Guangdong Province. It has 24 floors and a building area of ​​40,000 square meters. Each side of the main building has a three-story podium, and the main part of the building is a symmetrical structure. Its traffic command center is located on the top floor, offices 5 to 23 are offices, restaurant is on the fourth floor, and business halls are located on the first to third floors. The underground is divided into three levels; the first floor is an underground parking lot with 260 parking spaces, the second floor is an electromechanical equipment room, and the third floor is a wartime air defense station, usually a debris storage room. The main functions of the traffic building are: ◠Centrally managing the number of motor vehicles in the urban area; ◠Unified scheduling and management of road sections where major traffic problems and vehicle peaks occur.
one. The system integration mode of the transportation building has not yet reached a unified conclusion on the integration of the entire intelligent building in China. At present, the following four modes are mainly used for the integration of large-scale public building BMS systems:
1. Contact system integration
2. Integrate with serial communication
3. System integration with BA as a platform for building automation systems
4. System integration based on the equality of subsystems. The first integration method is the initial means of system integration, and it is rarely used in BMS integration; the second method is slow in communication speed due to serial communication; the third type of integration method has a large defect, and the BAS system is A relatively closed system lacks the ability to open up, and the interface devices and interface software of other subsystems are limited to specific products, so the system integration capability is limited, and the maintenance and upgrade costs are too high. BAS binds too tightly with the BMS Once the BAS fails, the BMS also declares that it has lost its normal working capacity and cannot manage and monitor the subsystems that are still working properly. In response to the user's requirements for use and the five principles of system integration, our company has adopted an integrated approach based on the equality of subsystems. The entire traffic building can be integrated into a parallel two-tier structure according to the functional requirements put forward by users. The OA and CN of the Traffic Building constitute an integrated business information management automation system consisting of an integrated communication platform, traffic information communication, and an alarm system. (MAS); A building management system (BMS) based on building property management is separately constituted by systems related to building management such as BA, FA, and SA. The integrated system is shown in the figure below. The five subsystems of the OA and the six subsystems of the CN are coordinated by the MAS. The BA's seven subsystems and the property management network are managed by the BMS. The databases of the two can be interconnected according to the permissions and requirements.
two. Transportation Building Cabling System The MAS system in the entire building adopts an integrated cabling system as a transmission medium subsystem (Super Category 5 and Category 6 hybrid cabling structures).
1. According to the analysis of user needs, the intelligent building of the traffic building mainly includes subsystems such as power distribution equipment monitoring, mechanical and electrical equipment monitoring, fire alarm, cable television, security automation, broadcast audio, information communication and computer networks. In theory, integrated wiring can support the signal transmission of the above various subsystems, covering almost all weak systems. However, in practical applications, the backbone network topology of the equipment monitoring system is generally a bus type, and the integrated wiring is a star topology. If the system uses integrated wiring, the length of the twisted pair must be increased; the cable television system can use optical cables to transmit RF signals. Signals, but to increase the adapter, the system reliability is reduced, and its investment is also more expensive than coaxial cables; the transmission of video signals in closed-circuit television monitoring systems such as UTP, the shielding performance is worse than the coaxial cable, using FTP, its price than the same Axial cables are expensive, and power cords must be laid separately; fire alarm systems are mainly bus-type structures, and these reasons are also present, and current regulations stipulate that fire alarm lines cannot be shared with other lines and co-construction, because the management system is not the reason. Suitable for integrated wiring; broadcast audio system output voltage of 70 ~ 120V, such as the use of integrated wiring there is the problem of cable over-voltage, this part of the system is not suitable for integrated wiring. Therefore, the most suitable system for adopting the integrated wiring transmission medium is a MAS (communication and computer network system).
2. Comprehensive Cabling Design Level The integrated cabling design level is divided into Basic, Enhanced and Integrated. Combining the needs of users for the use of voice and data equipment, and taking into account the development of the next 10 to 15 years, the building adopts a comprehensive design level and uses fiber optic cable and UTP hybrid networking.
3. Design options for horizontal work area and equipment connection equipment Option One: Use Super Category 5 products to support the requirements of 100Mbps Ethernet and 1Gbps Ethernet, and support the need for 550MHz broadband video transmission to the desktop, and for the future Upgrades provide convenience. Since the bottleneck of data transmission is mainly in data sharing devices and network switching devices, the connection devices in the horizontal work area and the management room use Super five products. In addition, a small number of optical fiber-to-desktop information points are also installed in each floor, which are mainly distributed in the comprehensive conference rooms, command centers, network centers, and key offices. This solution is ideal for those systems that want to invest minimally but at the same time to ensure user performance, that is, where network cost requirements are more important than network bandwidth. Option 2: Choose six types of products with wider transmission band, faster transmission, and better transmission quality. Also, set a small amount of fiber to the information point on the desktop in each floor. The bandwidth and transmission rate of Category VI cabling is much higher than that of Category 5 cabling (supports 1.2G/2.4Gbps ATM and 1.0Gbps Gigabit Ethernet applications, and the data transmission rate is 5 to 6 times faster than Cat 5) . Category 6 cabling is used with fiber optic-based vertical trunks to provide complete end-to-end cabling solutions for high-bandwidth applications and is highly advanced, especially for future network expansion and upgrades, reducing maintenance costs, but The disadvantage is that the price is higher. The investment of this plan is 35% more than plan one, and an increase of about 1.8 million yuan. After further discussion with Party A on the actual needs and project cost, the structure of the Category 5 and Category 6 hybrid wiring was adopted in this system.
4. Data vertical trunking solution Because of the use of faster network switches at each floor, these ever-increasing network loads exceed the capacity of large-pair twisted pair cables. To support Gigabit Ethernet and future applications with higher data rates, data The vertical trunk uses multimode fiber. Multimode fiber has a high optical coupling ratio and a relatively loose core alignment. When the bending radius is greater than 10 times its diameter, it does not affect signal transmission. It is a main transmission cable that conforms to IEEE802.5 FDDI and EIA/TIA 568 standards. The ability to support computer networks over 100m transmission distances in buildings and high-bandwidth high-speed network transmission applications to ensure current and future network system requirements. Voice system: Although the voice system is now not only a traditional telephone service, but also a variety of services such as ISDN, the adoption of ultra-quino-type logarithmic copper cables can fully meet the communication technology requirements of the next 10 to 15 years. Therefore, the voice vertical trunk uses ultra-five large logarithmic copper cables.
5. The information point configuration information point configuration is mainly determined by the comprehensive wiring design specification, the owner's demand for voice and data terminal equipment, and taking into consideration certain information point reservation amount. With reference to the use of integrated wiring information points in some domestic traffic management buildings, the command center office buildings, the 1st to 3rd floor office halls are 5 to 6 information points, 10m2, and the network centers are 7 to 8 information points, 10m2. It is 3 to 4 information points/10m2. For areas where the current use of the building is unknown, according to its specific location, basic settings and enhanced settings respectively. The building has a total of about 5896 information points. There are 2531 voice points, 3365 data points, and 156 fiber-to-desktop points.
6. Major Equipment Configuration At present, there are many types of products for the production of integrated wiring at home and abroad, which are mainly divided into three major faction products: Europe, North America, China, and Taiwan. Party A selected the products of the American company Simon in our company's recommended equipment. The specific configuration is as follows: The voice system and the data system in each work area subsystem adopt six types of information modules and can be used in a network environment with a transmission rate of 100 MHz. The purpose of using the six types of information modules at the same time in the voice system and the data system is that the two systems can backup each other and improve the flexibility of the system.
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