【 Weak current College 】 on Shanghai Marriott Hotel, intelligent building weak electricity system design

Measure the urban architecture of modern standards, architecture design patterns and intelligence are the two main aspects. Intelligent building weak electricity system is mainly composed of following system components:
(1) communication network system; (2) Office automation system; (3) construction equipment monitoring system; (4) fire auto-alarm and coordinated control system; (5) public security system; (6) a structured cabling system; (7) power supply and grounding systems.
Intelligent building weak electricity engineering design should be the starting point, to building the platform, configuration of all functions of the system, to provide an investment of rational and efficient, comfortable and convenient environment space to accommodate the needs of the current modern architecture. From specific design, the exact nature of the intelligent building, take full account of the owners and users of all kinds of functional requirements, the design of the overall structure as possible modern, technologically advanced and practical and economically reasonable, taking the intelligent construction each system compatibility and extensibility.
Shanghai Marriott Hotel, located in the Shanghai HongQiao district, is a hotel, showroom, Office as one of the five-star hotel. It covers an area of 2.2 thousand square meters, construction area of 4 thousand square meters. Hotel high 8, underground 2. The hotel is divided into A, B, C section of three parts, the AB as the hotel lobby and guest room floors, C as part of the exhibition hall and office building.
The following, the Shanghai Marriott Hotel-current engineering of parts of the system: communication network system of public radio paging system, satellite master antenna television systems, internal wireless paging systems, telephone systems, automatic fire alarm and coordinated control system; public safety system CCTV monitoring system, alarm system, as well as garage management system; structured wiring systems and electronic power supply and grounding system on its design.
1 public radio paging system
Hotel radio paging system is divided into 2 categories, one is for the public areas (e.g. lobby, Hall, hotel front desk service area, etc.) of the public system, usually for background music radio, fire or emergency situations can be switched to emergency broadcast, II are object-oriented Office meeting area and garage area of broadcasting system (in particular regional and Ballroom, you need to individually set professional broadcasting equipment).
Public radio paging system structure is shown in Figure 1.
Public radio paging system design mainly consider several factors: the system (General selected pressure type), a division of broadcasting Division, press speaker characteristics determine speakers and amplifier, emergency broadcasting of switching, broadcasting channels and stairs.
Marriott Hotel broadcasting system to four logical partition (i.e. hotel, show room, garage and office building), which corresponds to the emergency broadcast 19 child partitions that correspond to the internal call to 19 child partition, make sure the speakers and the amplifier is the principle that you must consider the effect of the radio speakers and on the basis of its power to determine the power amplifier, Marriott Hotel in the hotel front desk service area and Office sites use shape, frequency response and high sound pressure indicators 6W ceiling speaker selection in the garage, 10W Horn speaker selection in showroom 20W sound control.
Public radio paging systems should have two main functions, i.e. the usual background music or radio and emergency broadcasting in General. Emergency broadcast master controller has the highest priority of logic. Marriott Hotel, emergency broadcasting Chief controller when a fire control trigger signal arrival, by starting the partition logic control module to the corresponding load circuit switch into corresponding emergency radio circuit. 　　In peacetime, no fire signals, each partition independently, the corresponding circuit switch to normal broadcast loop, and when no ordinary radio control signal, it is in the background music or room acoustics. 2 common wireless TV CATV and satellite receiving system
The intelligent building of the sharing wireless TV system is adapted to the use of part of the functional requirements, the system not only for receiving radio and TV, also capable of transmitting to broadcast programmes and FM radio. System components are shown in Figure 2.
As intelligent building CATV system design, the system guarantees the user level, solve the problem of weak electric field intensity rating to ensure image transmission quality and program sources should be fully taken into account. System of the front-end device CATV, its signal processing quality have a direct impact on the quality of the entire system, so the front-end system output should have high quality to satisfy an allocation system for the required level.
Marriott hotel front-end devices adopt amplify-hybrid, its transmission system uses the distribution-branch, to accommodate the number of hotel user terminal and distribution features. Hotel system of transmission bandwidth (5 ~ 860MHz) can transfer 40 sets of television programmes, transport system covering 530 TV user terminal.
Satellite receiving system siting and installation and debugging is an important part, after receiving, demodulation, modulation of satellite signals mixed into common wireless TV system front-end part of the transmission distribution system to deliver to the user terminal. Marriott hotel has adopted a set of plate-like satellite TV receiving antenna for receiving different TV satellite TV signal 10 set.
Marriott Hotel sets a VOD service system, its function is to serve as a hotel front desk for program control and signal service, as the admin can log information, query, change fees, additional programs and information services.
3 internal wireless paging system
Intelligent building management portion of the signal, use the advanced paging system is very important. Marriott Hotel wireless paging system design uses micro-cellular paging technique. Microcellular paging system is the use of cellular technology to enable fixed field strength of private paging network, which is a one-way communication system for building internal use. The system consists of a wireless paging control center, micro-cellular transmitter unit, data transmission lines and paging receivers. System block diagram shown in Figure 3.
Paging control centre located in the hotel basement, with the hotel's telephone switch, switch ext paging or artificial Keyboard page. Paging signal over the wire to the floor honeycomb emission unit and then to launch, so that in the field covering wide receiver receives the homingCall signal.
For intelligent building paging systems design, generally encounter another problem. First, the internal signal on building external signal interference, the second is the building of the "blind spot" for paging. Wireless-cellular, field strength coverage control in 10 ~ 50m, utilizing community networking technology, in the hotel's three-dimensional space composition of limited space field, in addition, the paging system design can also be arranged through the micro cellular composition of arbitrary shape of wireless communication systems, through emitting unit power adjustment (10 ~ 100mW) can make wireless field strength distribution in the qualified hotel room, this "single point" wireless paging system of power, not regulation, firing distance, easy to outside interference characteristics are very different.
In intelligent building, building materials (reinforced concrete structure) inherent shielding effect, making the page signal level after the penetration loss can not be connected to form a "blind spot" or a weak signal area forming the "weak" (should increase emission unit, adjust the emission unit location to reach the desired field strength).
4 telephone communication system
Marriott Hotel telephone communication system consists of switching equipment, transmission system, Terminal devices. The hotel adopts the 1200 door PABX equipment, attendant greater functionality. Digital stored program control switches can be different depending on the need to implement the many hotel services features such as system functionality, traffic and user extension capabilities, also have the choice of functionality (including wireless paging through a switch and paging hosts connections for paging features as well as hotel management such as registration check-out, traffic billing, State input and print invoices, card reader etc.).
Hotel phone room located in the ground floor, including the transmission equipment room, switch room and telephone traffic.
The hotel's telephone line wiring way uses separate style, characterized by small, maintenance scope, extension of simple, each floor phone wiring using radial. Hotel phone line with 3 kinds of 4 pair, RJ11 socket used telephone terminals, which not only high call quality that meet the needs of the user's dial-up Internet access.
On each floor of the telephone wire-box choice, you should try to leave allowance, for future expansion. 5 fire alarm and coordinated control system
Marriott hotel's intelligent fire control system, is a comprehensive fire safety alarm system. It is divided into four sub-systems: the fire detection system, the central control system, fire alarm systems, fire-fighting response system. See Figure 4.
Central control system located in the hotel a layer of fire Centre, the three sets of intelligent fire control panel. Each set of intelligent fire control panel with 10 monitoring circuit, each circuit can be 99 intelligent probe and 99 monitoring module. Three sets of control of the actual control 28 loop total 2700 more detection point and modules (including office building). Intelligent control system for fire through the central processing unit for the entire system all modules for communication monitoring and feedback show their fault and, in its programmable memory in the "incident control procedures", once the system detects a fire alarm signal, can automatically execute the program, and through the fire alarm system notifies all staff within the hotel. System alarm signal has to confirm the action, the system can be based on various occasions, the hotel will be smoke detector sensitivity set to daylight/night sensitivity conversion mode.
As the eyes of fire control system, fire detectors distribution all protected parts of the hotel. In the hotel's front desk service area and rooms are set up with smoke detector site; in the admin areas smoke detectors; in the kitchen, garage, etc. set temperature probes; gas meter room set gas detectors. Through addressing the smart probe, Manual alarm and control modules a reliable fire detection system.
The hotel's fire alarm system by regional alarm display, alarm, sound and light alarm and control modules. Hotel fire linkage system include: (1) in the layer of water sprinkler system pipes and pressure switches for direction of monitor and start spraying pump and regulators pumps. (2) fire hydrant started directly. (3) the fire shutter, exhaust fan and booster fan monitoring. (4) on the air conditioning system of monitoring and system control.
6 closed-circuit television monitoring system
Use of modern technology increasingly comprehensive public security management facilities to the hotel provide comfortable and safe is the starting point of the design.
Marriott Hotel CCTV monitor system detectors by the camera, image transmission and control equipment, image processing and display unit 3-part, shown in Figure 5.
7 alarm system
The hotel of valuables to the Treasury, financial accounting, and other important places using infrared or microwave signal detector for directional protection, some of the hotel door set magnetometer alarm protection. The above warning signal to cable sent to Security Center. This is the hotel security, an important technical measures.
8 vehicles and export management systems
In modern architecture, integrated management of the garage and more important. The hotel's 2 underground garage for the underground garage of the integrated management system include the IC card reader, electric fence, vehicle controller, dynamic computer monitors, etc.
9 structured cabling system
As the basis for intelligent buildings, structured cabling system is a new concept of wiring systems for service buildings in all of the communication and computer equipment to meet current and future layout requirements.
Design should be based on the intelligent building of the present and planning needs. At the Marriott Hotel, the design did not include telephone communication into structured cabling system, this is because as a hotel, voice and data between two Terminal boundaries, and position was apparently difficult to change. In addition, from a technical and economic considerations, 3 cable bandwidth 16MHz, may transmit the following low-speed data 10Mbps and, as language transmission is cheap and works well.
Marriott Hotel, structured cabling is computer management system of structured cabling. The hotel's computer management system into the LAN system and checkout system (POS). Marriott hotel front and backstage total TerminalMore than 500 information point, the LAN information Terminal located in the basement office area and one to three-layered Hotel background administration area, cashier system information terminal in the hotel between one and three layers of front desk service area.
Hotel structured cabling system is divided into four sub-systems:
9.1 workspace subsystem section
Through the floor of the wiring box to reach the information terminal. It consists of 5 class 4 pair and RJ45 Terminal socket. This section has a antijamming, reliable and flexible features.
9.2 link subsystems segment
Use of multimode fiber optic cable connection hotel computer room and various layer wiring box (i.e. total distribution frame and layer assignment line frame connection). Multimode fiber optic transmission speeds of up to more than 500Mbps, have sufficient bandwidth for future wiring system with sufficient room for development.
9.3 management subsystem section
The layer of wiring boxes. The hotel's front desk service, admin area, information terminal number more widely distributed, total computer room located on the first floor. Taking into account the floor wiring box information terminal maximum distance not exceeding 100m, so in the floor of the front desk service and admin areas are set up wiring boxes (boxes installed optical fiber cables/twisted-pair cable adapters, hubs, twisted-pair jumper frame, etc.)
9.4 device subsystem
Located in the computer room equipment and trunk lines, etc.
10 power supply and grounding system
Intelligent building weak electricity power system must be reliable, stable and non-interference. Of these, the computer and peripheral equipment, fire fire alarm equipment and communication equipment in the case of level electrical equipment load, dual power supply since the cut at the end. On Terminal computer equipment configuration separate UPS devices.
Marriott Hotel in electronic engineering, automatic fire alarm system, a computer, the local area network and cashier system uses the dual power supply since the cut at the end. Dual power switch cabinet power distribution from hotel rooms of 2 transformers for low voltage circuits and 1 diesel generator supply.
Hotel systems-current engineering, are equipped with independent power distribution box control.
Weak electricity system grounding is weak electricity system an important link.
To reduce interference and protection devices, power and grounding system must be separate earthing, Marriott Hotel in all of the weak electricity grounding electronic system grounding are greater than the copper wire 25mm2 above and outdoor ground piles.
11 closing
Intelligent building weak electricity engineering broad, technical, and design a comprehensive perspective.
As modern society in the development of high-tech, the intelligent building weak electricity engineering and computer control communication and automation management technology requirements are also increasingly this requires constant mastery of new technologies, and constantly improve the design.
Create investment reasonable environmental comfortable smart building construction is urgently needed.