◎ Monitoring of operation management of construction equipment, including
(1) HVAC system monitoring;
(2) Water supply and drainage system monitoring;
(3) Monitoring of power supply and lighting system
◎ Fire alarm and fire control linkage control, elevator operation control.
◎ Technical preventive measures for public safety, including:
1, TV monitoring system;
2. Anti-theft alarm system;
3. Access control and access control system;
4, security personnel inspection system;
5. Integrated garage management system;
6, all kinds of important warehouse prevention facilities;
7. Secure broadcast information system.
Many mechanical and electrical equipment have internal relations, so it needs perfect automatic management. Establish a mechanical and electrical equipment management system to realize the comprehensive management, scheduling, monitoring, operation and control of mechanical and electrical equipment.
Functions of building automation system:
◆ Formulate strategies for system management, scheduling, operation and control;
◆ Access parameters related to data and control;
◆ Manage, dispatch, monitor and control the operation of the system;
◆ Display data, images and curves of system operation;
◆ Print all kinds of reports;
◆ Conduct historical records and trend analysis of system operation;
◆ Equipment running time statistics, equipment maintenance management, etc.
What is an intelligent building? What is its basic composition?
Intelligent building is the product of the information age and the crystallization of the close combination of computer technology, communication technology, control technology and building technology. It is to meet the needs of modern social informatization and economic internationalization for the function, environment and efficient management of buildings. Intelligent building consists of three integrated subsystems: building automation, office automation and communication automation. These integrated subsystems form a network through integrated wiring. Realize intelligent management.
What is building automation control? What is its basic composition?
Building automation control adopts computer distributed control, namely decentralized control and centralized management. The distributed controller usually adopts direct digital controller (DDC), and the upper computer is used to monitor and manage the picture. The main means are animation, curve, text, database, script and various special controls. Building automation includes: air conditioning and ventilation monitoring system, water supply and drainage monitoring system, lighting monitoring system, power supply monitoring system, elevator operation monitoring system, integrated security system, fire monitoring system and structured integrated wiring system.
What are sensors and transmitters? How are they applied in building automation system?
Building automation is mainly to monitor the equipment in the building, which requires the collection of on-site signals, such as monitoring temperature, humidity, pressure, flow and enthalpy of carbon dioxide. Sensor refers to a device or equipment that can sense the specified measured signal and convert it into usable signal according to certain rules. The transmitter converts the electrical signals output by the sensor into standard (current, voltage) electrical signals after verification. In building automation system, it is usually used to detect the temperature, pressure and flow of hot and cold water in air conditioning system, the temperature and air quality of air supply system, the voltage, current, power and power factor of power supply system, etc. The collected signals are processed by the transmitter and then input to DDC to realize automatic monitoring and management.
What is the classification of valves and actuators? What role do they play?
Valves and actuators are often used in building automation control. Valves are actuators, including air valves and water valves. They mainly control the opening of variables. Electric actuator and damper actuator are electrical devices used to drive water valves and air valves, and they can output switch and analog signals. Especially for analog control, the opening of the valve can be adjusted by PID, so that certain interlocking control can be realized between them. Widely used in water valve control of refrigeration station and heating station of air conditioning system. And the air valve control of air processor and fresh air unit.
What is a direct digital controller? What is its main function?
Direct digital controller refers to the control device that completes the measurement of the characteristic parameters and process parameters of the controlled equipment and realizes the control goal. Direct digital controllers are also computer families. Its main
1. Collect data from the data sampling equipment on the third floor regularly;
2. Adjust and process the collected data (filtering, amplifying and converting).
3. Analyze the data collected in the field to determine the running state of the field equipment;
4. Check and compare the running state of the field equipment, and give an alarm to the abnormal state;
5. Execute a predetermined control algorithm according to the data collected on site to obtain control data;
6. Complete various control functions through predetermined control programs, including proportional control, proportional plus integral control, proportional plus integral differential control and other control functions;
7. Output control and execution commands to the data control and execution equipment on the third floor;
8. Connect a layer of equipment through the data gateway or network controller, exchange data with the superior management computer, and send out requests and receive various control commands at the same time.
What is the definition of integrated wiring system?
Integrated wiring system refers to the information transmission media system between buildings or buildings. It combines the wiring and connection components required by various devices such as voice, data and images into a standard universal transmission medium. At present, it is mainly based on communication automation.
On the relationship between integrated wiring system and intelligent building
Intelligent building is an inevitable product of the information age and a clever combination of information technology and modern architecture. Integrated wiring system is the nervous system of intelligent building, which can meet the requirements of high efficiency, reliability and flexibility of intelligent building and is an essential infrastructure in intelligent building. It organically connects 3A systems of intelligent buildings.
Concept of communication automation system
The information communication system of intelligent building is the basis to ensure the transmission of voice, data and images in the building. At the same time, it is connected with external communication networks (such as telephone public network, data network, computer network, satellite and radio and television network) to exchange information with all parts of the world.
At present, the communication system in intelligent building is mainly composed of program-controlled digital subscriber exchange and cable TV. The former is developed from telecommunication system, while the latter is developed from radio and television system. With the development of 4C technology in the future, it will be possible to unify the communication automation system of intelligent buildings.
◆ The design of communication network system should meet the requirements of office automation system, and can adapt to the development trend of digitalization, intelligence, integration, broadband and personalization of communication network of telecom departments outside the building. We should consider adapting to the development of public networks in access networks and integrated services digital networks (ISDN) to provide users with fast, effective, safe and reliable information communication services, including communication services in various media such as language, characters, graphics, images and computer data.
Customers can define their own service communication methods and adjust the communication service functions.
◆ Content of communication network system
◆ Fixed telephone communication system: use public network to set up program-controlled digital PBX or centralized PBX.
◆ Voice service communication system:
1) Voice mailbox: It has the function of storing foreign voice, which is convenient for telephone users to extract voice information through their mailbox password. This voicemail can be used to automatically provide a call to the customer (when the voicemail system and the wireless paging system are connected). Tell them to pick up the voice message.
2) Voice response system: inquire relevant information by telephone and respond to the service function in time.
◆ Wireless communication system: It shall have the functions of selective calling and group calling.
◆ Satellite communication system:
Satellite transceiver antenna and VSAT communication system are installed on the roof to form voice and data channels with the outside world and realize long-distance communication.
◆ Multimedia communication system:
1) Internet Internet
It can be accessed through telephone network, packet data network (X25), digital data network (DDN), integrated services digital network (ISDN) and frame relay network (FR), and adopts TCP/IP protocol.
2) Intranet: a computer network within an enterprise or group.
◆ Video service system:
1) videotex system: receiving dynamic videotex information.
2) E-mail system: it has the function of storing and extracting letters, faxes, telex and other mails.
3) Video conference system: Through the equipment adopting video compression technology, it provides users with the functions of displaying near and far visual images and making synchronous calls.
◆ TV communication system:
1) Cable TV system: it can receive encrypted satellite TV programs and encrypted data information;
2) Public address system
◆ Electronic information display system (hall)
◆ Video on Demand System (Guest Room)
◆ Simultaneous Translation System (International Conference Hall)
◆ Computer communication network system: It should be composed of network structure, network hardware, network protocol, network operating system and network security.
What is an intelligent building?
The concept of intelligent building was born in America at the end of this century. 1984 The first intelligent building was built in Hartford, USA. China started in the 1990s, but its rapid development attracted worldwide attention.
Intelligent building is the inevitable product of the information age, and the degree of building intelligence is gradually improved with the development of science and technology. The main symbol of the development of science and technology in the world today is 4C technology (that is, computer technology, control technology, communication technology and CRT graphic display technology). The 4C technology is comprehensively applied to the building, and a computer integrated network is established in the building to make the building intelligent. 4C technology is only the structure and systematization of intelligent building.
Intelligent building should be:
"By optimizing the design of the four basic elements of building structure, system, service and management and their internal relations, we can provide an elegant, comfortable, convenient and highly safe environmental space with reasonable investment and high efficiency. Intelligent buildings can help building owners, property managers and owners realize that they get the greatest benefits in terms of cost, comfort, business activities and personal safety. "
The purpose of building intelligence is to apply modern 4C technology to form intelligent building structure and system, and provide a safe and comfortable living, learning and working environment space for people by combining modern service and management means.
Intelligent building structure consists of three systems: building automation system (BAS), office automation system (OAS) and communication automation system (CAS).