LonWorks architecture of intelligent community security and key technology (1)

Abstract: this paper first outlines the smart community in today's social status and development prospects, then elaborated on the LNS technologies, final details the LNS architecture of intelligent community security and application of key technologies.

First, the intelligent community of the status and development prospects

1. the concept of intelligent community

Intelligent building is a computer, communication, architecture and image information, and other technology integration through the advanced design and strict construction and receive with security, advanced, comfortable, healthy, friendly, and other characteristics of the building.

It covers intelligent automation, information, ecological, and other aspects of the content.

The intelligent building technology extended to a zone of several integrated management for intelligent buildings, connected with gradation for unified management, this area is called the intelligence community.

Take the centralized control, modular design, all subsystems of management has focused on the integrated control center. Integrated control center managers can check and confirm that the community household family safety conditions and three table status, etc. Intelligence community is the intelligent building after a hot trend.

2. the current status of intelligent community

Current smart residential basic configuration of the application system mainly includes the following aspects:

● Information communication system: providing user voice communications, video broadcasting, broadband information services.

● Security system:

A) community alarm, set the infrared, microwave, and other devices that can display the alarm centre section and the alarm time.

B) video surveillance, community focus parts set corresponding detectors or camera, monitor relevant information and the transmission of images and records and

Storage.

C) community residents with a gas leak alarm system indoors, a magnetic belt, red outside, glass breakage, leakage detection, emergency and other functions.

D) community outdoor public places set cable system.

E) with a smart card or other form of access of vehicles to conduct management and billing.

• Construction equipment monitoring system:

A) through the drainage monitoring system monitors, displays information about the running state.

B) Elevator status of a failed State and floor location being monitored.

C) lighting equipment monitoring.

• Property management system:

A) configuration utility computer property management software for residential property management computerization, the establishment of community management information system.

B) implementation of remote meter reading capabilities.

C) system implementation information connected to the unified management.

Of course, the actual construction process, but also according to the needs of the market, carry out other functions blending of Tim.

However, current intelligence community building in a number of problems still exist.

General community in order to achieve the objective of the centralized monitoring and control in central control room settings to the computer as the core of the central station, substation is a microprocessor as core to form distributed by the distributed computer systems. But its sub-station of microprocessor with a microcontroller-based 486, 586, import of DCS module. Either product advancement is not strong or costly. Allows intelligent management system's reliability and advanced quality is not high. At the same time as the smart community project is carried out in stages, it also makes the system capacity scalability is not strong.

There are also some intelligent control system according to the functional, vertical split between the various subsystems, cannot share information, device repeated investment.

The resolution of these issues are available from the following angles:

Taking into account the advanced equipment and technology, intelligent Community system uses LonWorks bus technology, so that the whole community of advanced network reach.

LonWorks control networks including consists of one or more communication channel connecting smart module that is intelligent nodes, nodes communicate through LonTalk Protocol.

Intelligent module can be programmed to send realizing information and responses to foreign directives. Because Intelligent module has a low cost, good compatibility, taking into account the characteristics of the intelligent community construction phases of the actual situation, very conducive to system capacity scalability.

Currently launched the LNS architecture of intelligent building control system, because many customers multiple LNS server technology can give Internet users bring many benefits: significantly reduce development time and costs; simple system integration; access data without restrictions, and so on.

This is described in this presentation system with LNS architecture.

3. the future of intelligent community

Intelligent community in future developments mainly has two aspects:

A "people-oriented".

Community building in future will gradually go to building intelligent family building. For example, enable community residents can at home the realization of "electronic money" transactions or online shopping, online medical diagnosis, visit the Virtual Museum and library, VOD VOD home theater; even outside the community residents or intelligent community management control center can be on community residents home air conditioning equipment and appliances for remote control, can stay connected and confirm that the security situation in the family. In short, the future of intelligent design will adhere to the user-friendly system design ideas, to provide warm and comfortable, accessible and affordable services, in the interests of the residents.

Secondly, the "energy saving".

Environmental protection is an important theme of the 21st century, future community building more consideration to environmental problems. Primarily in residential energy supply, to the principles in the spirit of energy conservation, community facilities in a service link in one of the community residents, community facilities, community environment highly uniform, harmonious and integrated.

Second, LNS technologies

LNS(LonWorks

Echelon Network Service) is the latest development from LON bus development tool that provides users a powerful client/server network architecture, the future LON bus to interoperability. Use LNS network services with guaranteed from different network server to provide network management tools can work together to perform a network installation, network maintenance, network monitoring, and numerous customer you can also apply these server provides network functionality.

LNS offers compression, object-oriented programming model that dramatically reduces development time and the user on the system requirements.

It will be the network into a hierarchy of objects, object properties, events, and methods for network access. And access data without restrictions, allowing users to simultaneously use multiple human machine interface (HMI) and SCADA stations, data points, and access data on the network. And to enable users of the system design is simple, LNS provides automated as much as possible.

LNS architecture and host is irrelevant, it supports any platform users, these platforms can be embedded microprocessor or a Windows PC, UNIX workstation.

The host is via LNS API (Application Programm Iterface) to manipulate the LNS. LNS host API is a code layer on different development platform provides a variety of programming tools, greatly simplifying the system integration.

LNS architecture include four main components: the Web Services server (NSS), a network server interfaces (NSI), LCA object server and LCA data server.

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