1 Overview
Smart home , also known as smart home, is commonly used in SmartHome abroad. Similar to the meaning of smart home, HomeAutomation, Electronic Home (ElectricHome, E-home) Digital Home (DigitalFamily), Home Network (HomeNet/NetworksforHome), Network Home (NetworkHome), Smart Home (IntelligentHome), in China In Hong Kong and Taiwan, there are also names such as digital homes and digital homes.
Smart home or smart home is the use of advanced computer technology, network communication technology, integrated wiring technology, in accordance with ergonomic principles, integration of individual needs, networked integrated intelligent management of home life, to achieve more comfortable, safer and more convenient A new home life experience. Smart homes are no strangers to Chinese citizens. As early as 2001, there were media reports that Shanghai's intelligent residential houses had reached 400, but strictly speaking, they only added several kinds on the basis of the original video intercom. Simple systems (such as basic security control and three-way remote copying, etc.), the real intelligent home is still rare. After years of practical application, the intelligent community has made great progress. The intelligent community system that only provides security guarantees has been difficult to meet people's needs for security, convenience and intelligence. Therefore, smart home is bound to become a new market hotspot.
The connotation of the smart home system is mainly composed of home integrated wiring system, home security system, home appliance automatic control system and home background sound system.
The functional structure of the smart home system is home information control, home communication network and control bus, and home gateway. International manufacturers such as Siemens in Germany, Panasonic in Japan, etc., domestic manufacturers such as Lenovo, Haier, TCL have launched products.
At present, there are many types of smart home systems, including smart home systems based on building intercom system technology, home automation systems based on fieldbus technology , and smart home systems based on smart phones.
Due to the maturity of the building security intercom system, and the simple building intercom system to the home automation system, most of the smart home system products based on the building intercom system technology. These products are based on building intercom system technology (system structure and transmission system), adding functional terminal equipment (anti-theft, fire prevention, lighting, household appliances, etc.) in each indoor extension. The smart home system based on fieldbus technology has high technical content, strong function and easy implementation, which is the focus of this paper. The smart home system based on smart phones is an emerging industry technology, which is briefly described in this paper.
In the case of meeting the system function design requirements, different products may adopt different technical means, and its core technology - communication network architecture and controller.
At present, the communication network architecture technology for realizing smart home systems can be classified into three categories: bus technology, wireless technology, and power carrier technology.
The controller mode mainly includes a patchwork control system, a host centralized control system, and an intelligent control center.
2. Communication network architecture
At present, information network and control network technologies for implementing smart home control can be classified into three categories: bus technology, wireless technology, and power carrier technology.
2.1 Power Line Carrier Technology
The power line carrier technology originated in the United States. The X-10 communication protocol is applicable between the X-10 transmitter and the receiver, and uses the power cable in the home as the communication medium for home automation systems such as home security monitoring and electrical control. The disadvantage of X-10 is that one-way communication between many devices has no feedback mechanism because its control elements are imperfect, the communication medium is single, and the communication rate is low.
Dutch PLC-Bus technology is a two-way power line communication bus technology with high stability and high price performance ratio, and other power line control technologies can not match the system function, reliability and cost. It is mainly composed of three parts, namely transmitter, receiver and system supporting equipment. The only requirement for weak wiring in this system is that there must be a neutral and a live line in each switch box. HomePlug of the power line also has a good development prospect.
The domestic introduction of PLC-Bus technology mainly includes Sobo smart home system, and similar products of Jinan Zhongxun Gaoke Electronic Technology Co., Ltd. There is also (Foshan) independent development of intelligent wall switch products based on power line carrier technology.
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