(1) characteristics
System integration of building automation system should have the following characteristics: the integrated system which is advanced to some extent, the system has good openness, practicability and economy, system integration requirements to simplicity.The building automation system of modern architecture in the face of a variety of equipment, various protocols and various communication interface, a variety of technical system both hardware and software environment, integrated from the vertical and horizontal two aspects.
Vertical integration refers to the integration of the same type of subsystem, horizontal integration refers to the integration of different types of sub system.The integration also involves a technical problem of standard.
(2) the guiding ideology of system integration
The integration will appear after the features of the system, system characteristics determines the building's overall performance and degree of intelligence.Openness system mainly depends on the related subsystems in the large system integration, so one of the key contents of the integrated system is well related subsystems, and ensure that the system has good openness.
System planning and design integration must be a place, due to the implementation of the ability of the economy can be implemented step by step, but there must be a system of planning and design, prevent the phased loss.
Building control system to support the network environment into the backbone network and local network.The backbone network is the main channel of building communication, covering the entire building, into each subsystem data / information channel, so the requirements of large capacity, high bandwidth, standardization and generalization.
The structure of independent efficient local network design, good compatibility with the backbone network.In the design of building automation system, and established a communication network environment, if the support network environment of intelligent building system is a simple, the building automation system must be simple.
The building automation system has two kinds of typical network support system: one is between the central management station and field controller communicate through the network controller, there is a single standard network such as Ethernet directly to the central management workstations, PC and field controller connected together.
The technology of integration mode of building automation system generally adopt the following integration mode:
(1) BMS (building management system) as the center of the integration mode
Center for the BAS, FAS, SAS integration, and moderate with CAS and OAS integration.
(2) using BAC net integrated system
In BAS using BAC net integration, using FAS, SAS and BAS gateway network integration.
(3) using LON works integrated system
BAC net, LON works is about the measurement and control network technology, the system is suitable for large area dispersed monitoring points, but not for FAS and SAS.
(4) direct integration based on Ethernet
Using 10/100Base T as a backbone.But FAS and SAS can be integrated into the digital information only after BAS.
(5) the database integration model
The establishment of the management level in FAS, SAS, BAS level, using the database technology of each subsystem database for dynamic integration, implementation of each subsystem in integrated data management and linkage control.
(6) OPC based information integration IBMS
OPC (OLE for process control): for the object linking and embedding technology in process control.Where OLE is the object linking and embedding.
The use of OPC can solve the read and write standard and data transmission of data between application software and control equipment.The use of OPC technology can make the equipment software standardization.The use of OPC Technology (Integrated Building Management System, IBMS) information integration building integrated management system.
The first is the purpose of integrating the needs of management rather than centralized control.The control functions are implemented in BA, SA, FA.Integration must be unified planning, can also be implemented step by step, information interface, protocol and unified planning is each subsystem of the agreement system of environmental planning in order to implement unified reservation and unified configuration and unified.
(7) IBMS system integration
The Internet IBMS system integration of different subsystems in physics, logic and function, realize the comprehensive sharing of information.
The relevant state policies and regulations, must realize the system integration of intelligent building class.
(1) the requirements of the development of Technology
Control station control system has a good man-machine interface should be above the (system integration).Today's DDC, actuators and sensors are getting smaller and more powerful, intelligent control products from special to general development in transition, and a factory to control protocol bus interconnection interface and open with the safety standard.Property management requirements of daily management technology system easier, reduce the operation cost of the system.
(2) the level of integration and process
The system is integrated in several parts, elements are linked together as a whole, the height of related parts integration.Control domain and domain information called intelligent building.The hardware control subsystem with domain and control all the subsystems in the domain must be included in the building is the foundation of the construction schedule, building operation.The main information domain containing office automation software and information management automation software and office automation software decision support.
(3) the main function of the system after the completion of the integration
After the integrated system should be able to achieve the following main functions:
The operation condition of equipment of the whole building can be through text, graphic form flexible and real-time display, realize the centralized control and management of building equipment.
The implementation of centralized monitoring function of building electrical monitor the operation and fault alarm.
To realize the function of centralized management, air conditioning, refrigeration station, heat exchanger, water supply and drainage, ventilation, lighting, power distribution monitoring, optimizing control.At the same time also achieve schedule management, energy management, can be directly used for parameter setting.
The fire control system and security system through the third party access gateway building automation system
The communication interface through the third party gateway and standard fire protection system, such as RS232/485 serial port to transmit the information content of building automation system, a system host running status, fault alarm, fire alarm detector working state detector, address information, related linkage equipment state, when the fire occurred, automatic display and alarm related information in the integrated workstation the position, including fire and related equipment linkage state.
The integrated security system has alarm screen switching, the main monitor switch, start video, linkage control system, the alarm lamp position display function.
A deeper understanding of technology of building automation system model and system integration in network environment, building automation system integration requirements and levels and other issues, has important significance to make the building automation system integration.To solve these problems, the system performance will be greatly improved after integration, and can reduce the system cost, simplify system maintenance and improve the operation management level of building automation system, make the building more efficient operation control system.
