November 24, 2023

How many weak electronic systems are in a smart building?

ForewordHello, I'm Mr. Lin. The construction industry continues to grow to this day. The economic level of people is constantly rising, and demand of people is also constantly improving. Safe, efficient, environmentally friendly and smart buildings are becoming more and more popular and are also one of new items to buy real estate. In this environment, with rapid development of electronic information and Internet, low current systems are increasing and expanding to meet growing needs of people. It is a low current system that improves work efficiency and makes building more environmentally friendly. Text

Electric power applications can be divided into two categories: high current and low current, depending on strength of energy transfer. Electricity consumption by buildings and buildings generally refers to strong AC 220V 50Hz electricity and above. It mainly provides people with electricity, and converts electricity into other energy sources, such as air conditioning electricity, lighting electricity, electricity and so on.

There are two main types of weak electricity in smart buildings. One of them is low-voltage electrical energy, such as safety voltage level and control voltage provided by state. It can be divided into AC and DC, AC below 36V, DC. below 24V, such as a 24V DC power supply or backup power for emergency lighting. The other type is information sources that carry information such as voice, images, and data such as information from phones, televisions, and computers. People are accustomed to calling weak current technologies weak current technologies. It can be seen that main meaning of low current technology for smart buildings is still low current technology in original sense. However, with rapid development of modern high-end low current technology, application of low current technology in smart buildings is becoming more and more widespread.

1. The low current system refers to power supply system with AC voltage below 36V and DC voltage below 24V.

Electric power applications can be divided into two categories: high current and low current, depending on strength of energy transfer.

1. Powerful electrical system.

Electricity consumption of buildings and buildings generally refers to strong AC electricity 220V, 50Hz and above. It mainly provides people with electricity, and converts electricity into other energy sources, such as air conditioning electricity, lighting electricity, electricity and so on.

2. Weak current system.

Refers to power system below 36 VAC and 24 VDC. For example, intelligent fire protection system, monitoring system, computer network, building automation, smart broadcasting and so on.

Electric power applications can be divided into two categories: high current and low current, depending on strength of energy transfer. Electricity consumption by buildings and buildings generally refers to strong AC 220V 50Hz electricity and above. It mainly provides people with electricity, and converts electricity into other energy sources, such as air conditioning electricity, lighting electricity, electricity and so on.There are two main types of weak electricity in smart buildings: low-voltage electricity, such as safety voltage level, and control voltage set by state Backup power for lighting. The other type is information sources that carry information such as voice, images, and data such as information from phones, televisions, and computers.

What are low current systems? Weak current system solution

1. Construction equipment automation system

The building automation system uses a distributed control system that allows managers to control electromechanical equipment throughout building and carry out appropriate advanced control in central control room. The building automation system control central workstation, as center of intersection and processing of information about operation of electromechanical equipment in building, analyzes, classifies, processes and evaluates all kinds of collected information, and adopts best management method to perform distributed monitoring and control on each equipment Management to ensure that all subsystems and equipment have always operated in an orderly, coordinated, efficient and orderly state.

System functions: decentralized control, centralized control, energy saving and consumption reduction.

Scope of monitoring: signal acquisition, monitoring and control of air conditioning system, fresh air installation, refrigeration plant, cooling tower, fan coil unit, lighting circuit, power conversion and distribution, elevator and other systems to realize equipment automation. control system.

Achieve effect: effectively save electricity, save a lot of labor, extend life of equipment, effectively strengthen management, and ensure safety of equipment and personnel.

Generally speaking, all types of equipment in a building (such as water coolers, air conditioners, elevators, etc.) are consumable items. The equipment consumes electricity every day, requires money for maintenance and will one day be written off. The investment cannot be returned, only building automation system can save owner's money, that is, equipment that can return money.

Second integrated wiring system

The design scope of an integrated wiring system includes two parts: a telephone system and a computer system. The system provides high-speed and broadband transmission capabilities, which can meet information transmission needs of building, especially high-speed data transmission requirements of data system, and can adapt to development of current and future technologies, ensuring that it does not fall behind in 15-20 years.

Complex electrical wiring system named afterThere is a high degree of reliability in operation. Redundant redundancy is used for critical parts to ensure safety of line. It can adapt to needs of different computer network architectures. There is a high degree of flexibility and convenient management when changing equipment. Product versatility meets requirements of various network products and communication systems.

In integrated wiring system, except for horizontal cables fixed in building, all connectors are modular standard parts, and expansion and upgrade of system is easy. Protect user's one-time investment, maintenance cost is extremely low, and overall investment is kept to a minimum.

Third, computer network system

In smart buildings in future, communication automation, office automation and control automation will become very important components, whether it is high-speed transmission and processing of voice, text, images, data, or convenient daily business processing and management solutions. Open support for high-performance computer network system.

In past, multiple independent networks were required to provide various communication services, but in our solution, common core infrastructure provides various core services centrally, which not only improves efficiency, but also simplifies network, and traditional data network is built on a simple "best effort" model. ” to provide services, and today’s smart data network is built on an intelligent model that provides different levels of communication services according to customer needs, can adjust provided bandwidth and quality of service according to specific requirements of different applications and users. "Gigabit switching as backbone, 100M switching to desktop" has become basic structure of network infrastructure. On this basis, a modern computer networking system is formed by combining optical fiber with desktop and wireless networking methods.

Fourthly, security system

The security system includes closed loop video surveillance system, anti-theft alarm system, access control system, patrol system, perimeter security system, etc., and uses various methods to form a multi-directional and three-dimensional comprehensive security system, building protection system, providing serviceability of equipment in building, personnel safety. It can make appropriate judgments and actions at first time, and inform management and security personnel of various situations at scene of incident through sight, hearing, or other senses, so that they can respond to scene effectively and quickly. And whole process of incident occurred is duplicated and fixedIt is recorded in form of a video recording, which provides a reliable legal basis for working with scene.

V. Warning system

The public broadcasting system performs functions of background music broadcasting, public relations broadcasting, and fire broadcasting.

The main function of background music is to drown out noise and create a relaxed and harmonious auditory atmosphere. Since speakers are dispersed and evenly spaced, there is no obvious directionality of sound source, and volume is consistent without affecting normal conversation of crowd. This is an important tool for optimizing environment. Public relations broadcasting system can play role of advertising, broadcasting announcements and finding people. The fire broadcast function of public broadcasting system is used as a broadcast medium for fire alarm and communication system for emergency crowd control and evacuation, and plays a key role in design of low currents in buildings. This feature requires sound reinforcement system to be able to reach required sound field power to ensure that in event of an emergency it can be used to provide enough voices for people in building who may be involved in area. clearly hear alarm and evacuation.

6. Satellite and cable TV system

The design of satellite and cable TV system uses adjacent frequency transmission technology, and input equipment, amplifier and signal distribution equipment are selected from domestic and foreign advanced products, so that whole system will be fully equipped next year. from five to ten years, depending on needs of social development. To meet needs of future e-commerce, reverse bandwidth has been increased in system. Given development of digital technologies in future, part of data transmission is reserved for transmission of digital television and can be used as VOD video on demand.

Seven, conference system

Modern smart buildings tend to have more meeting spaces, including conference rooms, lecture halls specifically designed for meetings, and multipurpose rooms that can be used as temporary meeting places.

Meeting place owner Used for holding various meetings or presentations, functionally meet requirements of digital conference management and simultaneous translation, lighting control, conference discussion, impromptu speech, conference sound amplification, video display, etc. It can not only meet needs of internal meetings, but also meet needs of high-level electronic meetings, such as external live broadcasts, press conferences, large-scale international conferences, etc.

VIII. Digital exchange system with program control

The software-controlled switch used in smart buildings should be a high-standard, all-digital, world-class, software-controlled switch that should provide voice, data, image, narrowband and broadband multimedia services within building. The scope of digital program-controlled switches includes following:

Voice communication: With this device, you can realize international, domestic and local voice communication and multi-functional services, improving communication capabilities and quality of service.

Fax communication: A variety of fax machines can be connected through digital switcher, which greatly improves quality of text faxes. Integrated service digital network communication: Realize integrated service digital network communication service with software controlled digital switches.

Voice Mailbox Service: Through voice mailbox in switch, user's voice is automatically stored, and switch user can authorize retrieval of contents of voice mailbox, which increases level of communication automation in building.

9. Single card system

With universal card system, comprehensive attendance management of relevant personnel, access control management, internal electronic consumption management, parking management and other functions can be realized. Form a complete one-card general solution. In combination with characteristics of each building, a single card system can perform following functions:

1. Identity management;

2. Access control management

3. Attendance management;

4. Borrowing management;

5. Parking management;

6. Consumption management, etc.;

In a specific implementation, this may be implemented together or in stages, depending on actual situation. 10. Electronic information display system

Modern society has entered information age, and dissemination of information is becoming increasingly important. At same time, people are placing ever higher demands on visual media, requiring media to disseminate information intuitively, quickly, vividly and catchy. .

The function of electronic information display system is that, on one hand, it can display information about construction cases, practical news, notices, etc., which will have a good advertising effect; on other hand, it can play TV, LD, VCD, DVD, video in combination with audio and video equipment, etc., play role of decorating environment and creating an atmosphere.

In addition, it can also make full use of social status and influence of building to conduct various advertising enterprises and broadcast multimediaand advertising through an electronic information display system, thereby generating income for owners.

Eleven, Electronic Information and Reference System

The display content of electronic information and inquiry system may include introduction of general situation of building, distribution of indoor functional areas, contact numbers of main departments, etc. You can also add content according to actual needs in future, such as providing advertising or other service information. It can also have multimedia methods such as images, texts, sounds and videos.

The Electronic Information Inquiry System utilizes a multifunctional sensory inquiry device and advanced acoustic wave sensor technology. Entering information is very simple, convenient and fast. When used in combination with other multimedia technologies, users can easily and quickly live through rich and colorful touch interface. Human-computer interaction, combined with large and complete information and fast information retrieval, it can meet various information needs of different users.

Twelve, central integrated control system

Central building integration is process of bringing together several relatively independent and interconnected systems in a building into a larger system of scope. This larger system is not a simple collection of different subsystems, but a collection of existing individual equipment, functions and information into an interconnected, unified and a coordinated system so that cutting-edge high technology can be intelligently and flexibly applied to existing smart building systems to fully unlock their potential, role and potential.

The development of a centralized integrated management system is divided into two levels: Integrated Information System (IBMS) integration, real-time building automation, and professional monitoring subsystem (BMS) integration. Implement step by step in implementation of project. At same time, implement integration of BMS system with engineering structure and consider need for interaction with IBMS system when implementing BMS system. Our company is committed to realizing domestic first-class intelligent system based on a series of system integration technologies such as network integration, data integration, software interface integration and function integration, and uses open design ideas of standardization, modularization and serialization. The QHTF BMS central integrated management system software developed by company itself is used as a platform, and information transmission network is built with an integrated wiring system, a computer network system and other integrated communication systems, as well asintegrated building automation system. security management system and fire alarm system (if any) integrated into BMS intelligent low current monitoring and control system. This system allows users to make most of application software under Microsoft operating system or combine it with other packaged software to realize subsequent development and use of IBMS central integrated management system.

13. General description of functions

Through organic combination of weak electronic systems, overall function of intelligent low-current building system can be mainly reflected in following aspects:


1. Ensure normal operation of all mechanical and electrical equipment in building

2. Ensure personal safety and protection of property of people in building


1. Provide a comfortable and convenient environment for users to work and live inside building.

2. Provide suitable environmental parameters such as air temperature, relative humidity and air quality in building.

3. Guarantee supply of energy such as water, electricity, cold and heat.

4. Provide beautiful background music and information display to create a comfortable and pleasant atmosphere.


1. To meet needs of internal and external departments of building in exchange of information and implementation of sharing of information resources.

2. Building users can be aware of building's internal information.

3. Users of building can receive real estate services in time.

4. Empower building managers with property management tools.

Energy saving

1. Extend equipment life.

2. Save energy.

3. Save staff.

4. Optimize equipment usage

Weak electricity classification

There are two main types of weak electricity in buildings, one is low-voltage electrical power, such as safety voltage level and state-mandated control voltage, which can be divided into AC and DC, such as 24V DC control power. power supply or backup emergency lighting power supply.

Another type is information sources carrying information such as voice, images, and data such as information from phones, televisions, and computers.

The intelligent system is a building equipment monitoring system, a security system, a communication network system, an information network system, an automatic fire alarm system, and a fire communication system. It is a comprehensive system for centralized monitoring. , control and management; Lines such as data acquisition, control, command and control communications or network systems are called smart lines (that is, weak currents in home decoration).

Low current usually refers to DC circuits or audio, video lines, network lines, telephone lines, and DC voltage is usually within 24V.

Household appliances such as telephones, computers, TV signal input (cable TV lines), audio equipment (output terminal lines) and other electrical appliances are weak electrical equipment.

In general, low-current systems engineering belongs to second type of applications. mainly include:

1. Development of television signals such as television monitoring system, cable television.

2. Communication means such as telephone.

3. Intelligent fire protection technology.

4. Sound reinforcement and sound engineering, such as media and background music broadcast in community and background music in building.

5. Integrated electrical wiring, mainly used for computer networks.

With rapid development of computer technology, fast and powerful software and hardware functions, perfect combination of various weak current system engineering and computer technology, various classifications in past are no longer as clear as before, and mutual integration of various projects, this is system integration . The birth of low current system should serve construction industry and empower buildings so that buildings are no longer just stereotypical impression of reinforced concrete. The low current system makes buildings smarter, more energy efficient, safer and more efficient.