How to build an intelligent community network architecture system
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In the 21st century, people's "clothes, food, housing and transportation" level has been increasing. In today's comfortable food and clothing environment, the quality of living environment has become another important measure of living standards. After many years of practical application, the smart community has made considerable progress. It has been difficult to satisfy people's needs for security, convenience, and intelligence in the smart cell system that only provides security. Therefore, smart home is bound to become a new market hot spot.
In the practical application of smart communities, most of their integration methods are embodied in the integration of multiple independent systems, and their system integration, stability, and scalability will inevitably be compromised; in full-bandwidth solutions that fully integrate multiple systems, most will The transmission of multimedia signals and control signals is integrated, and transmission of low-speed control signals in high-speed bandwidth is not only a waste of network resources, but also has a high cost. Therefore, this solution is difficult to flex its muscles in the market.
From the analysis of various schemes, it can be known that intelligent communities often only require low-speed control systems to achieve real-time control, while home users need high-speed bandwidth to realize the multimedia transmission requirements. If it is possible to achieve seamless connection between low-speed control and high-bandwidth users, that is, in an intelligent community with a low-speed control system, home users can expand high-bandwidth applications at any time and connect seamlessly with the cell control center. Meet the needs of full-bandwidth users, but also to meet the cost control requirements of smart cells.
Based on the above assumptions, the company launched an application control platform bus system with independent intellectual property rights and low-speed control signals as its main purpose and seamless connection with high-bandwidth functions after extensive consultation and organization of technical personnel. ——Q-BUS intelligent community and smart home low-speed control bus system.
1. The existing standard communication network analysis applied to the intelligent community 2. The birth of the Q-BUS bus
Compared with the relatively low cost of RS-485 bus, although the CAN bus has a higher transmission rate, but the price is higher, and the same as the RS-485 bus network structure; LonWorks bus, Ethernet network platform, although There is a high bandwidth and a relatively complete topological performance, but in today's residential areas, the adoption of such a high-bandwidth platform clearly has the feeling of a racetrack on a highway; now the residential area network has become an intelligent supporting facility, but due to its network equipment Property rights make it difficult for such a network platform to be used by intelligent system platforms.
Smart communities and smart home systems, on the one hand, are developing in the direction of network platform integration; on the other hand, high bandwidth and low data traffic of full-bandwidth networks are such a contradiction; a network platform will surely emerge to satisfy the market. This urgent need, its system integration, network topology performance, reliability of low data traffic transmission, and reasonable cost performance will all make it possible to satisfy various demands of the market.
The birth of the Q-Bus network platform was born in response to this demand. It is based on traditional differential voltage transmission methods and uses carrier monitoring multi-point access/collision detection technology to achieve reliable and efficient data. Long distance transmission. In the realization of intelligent community and application of home automation, it will satisfy various transmission performance of control information and support for seamless connection of high-bandwidth data transmission, so that it will have a promising market.
Second, Q-BUS bus Introduction 1, to achieve description
The Q-BUS is based on the following two technologies to achieve its bus communication:
1) Based on the differential voltage transmission method 2) Using the CSMA/CD technology principle to realize the interface between the field bus technology Q-Bus transceiver module and the MPU:
1) Data connection can be realized through parallel port data line or standard UART 2) Handshake control between MPU and module by two control lines 3) Clock signal output from MPU's clock signal 4) Reset signal of module can be passed through MPU Control 2, function description
1) Realize the real-time and efficient transmission of network data 2) Data transmission between any node in the network 3) Network broadcast function 4) Network status detection function 5) Optical isolation function of communication interface circuit 6) Standard data package, easy operation, Strong extensibility 7) Network data 4-level priority classification 8) Standard MPU interface with parallel data line or standard UART
Third, application introduction
The application of Q-Bus as the intelligent community and smart home network platform is shown in the following figure:
1, application area introduction
As a communication platform, the purpose of the Q-BUS is to provide a reliable and efficient transmission network for various control equipments, so that the interoperability and interconnection of the equipment have a solid foundation. On this basis, the components are reliable and efficient. The system is achievable.
The intelligence of the community constitutes its network platform with the Q-BUS bus. Because of its high cost performance and its open interface, the integration of various intelligent systems in the community has become economical and efficient.
In smart home systems, the use of Q-BUS bus to achieve intelligent control of home appliances, with the seamless connection of high-bandwidth data bus, smart home brings high quality of life is no longer a dream.
2. Example One BA System
From the characteristics of the BA system can be analyzed and obtained the effective data flow of the network platform is less, if with high-bandwidth network platform, it is obviously unreasonable cost performance. The Q-Bus is used as the network platform in the intelligent BA subsystem of the building. The module of the bus is configured on each on-site DDC, and the DDC device is connected to the Q-BUS via the module. The price/performance ratio is self-evident. , and provide a reliable guarantee for the future expansion of the system.
In the DDC device configuration stage, the data flow path from the acquisition point to the control point can be set by means of on-site programming or downloading setting data via the network, and the control signal source of the control device is specified.
When the data (digital or analog signal) collected at the collection point changes, the change signal can be immediately sent to the corresponding DDC module to cause control action. Because of the use of carrier monitoring multi-point access/collision detection technology, the data Real-time transmission becomes possible, improves the network implementation efficiency, meets the real-time control requirements of the site, and because of the data transmission function between any nodes in the network, it saves the collection point data to the control center, and the control center sends the control data to the corresponding control. The data transmission time of the point is depleted; and the collection point can be set to report the data to the control center at the same time for data backup.