Research And Design Of Smart Home Experience Center Based On KNX Bus

Smart home is based on modern computer technology, modern control technology, modern communication technology and modern graphics technology, which organically combines each subsystem related of the household life together, constituting a collaborative and convenient intelligent network, effectively improving people’s living environment and way of life. In recent years, the state has increased the support of smart home industry, with the progress of relevant technology and the development of the industry, Haier, Changhong and other appliances began to get involved in the smart home industry. And also many science and technology enterprises specializing in smart home product development such as NEAT have emerged, so that the number of smart home products having independent property rights in our country is increasing. At present, smart home promotion and sales center adopting the technology and product experience mode has emerged, which plays an effective role in the promotion of smart home products. The smart home experience center is a complex of displaying smart home fuctions and features to consumers, such as all kinds of light changes in light and shade, scene swaps in audio and video, adjustments of electric door and window curtain with the change of environment, as well as the perfect exhibition of intelligent network remote control function of all kinds of household electric appliances, so that the consumers can experience their own ’future home’.KNX bus technology has good interoperability and interactivity, and it is the only international standard for home and building control. KNX protocol follows the OSI protocol specification, which is widely used in the wired network of smart home equipment. Based on the reference and analysis of existing smart home solutions from Changhong smart home and NEAT smart home, this paper presents the design solution of smart home experience center based on KNX bus. Because that the smart home network based on KNX bus can not directly interact with the Ethernet and wireless network, this paper specifically designs and develops the smart home gateway based on KNX, which can better solve the interconnection problem of KNX smart home network and external network. Smart home gateway is the key equipment of smart home network collecting with external wired networks and wireless networks. It accepts information from a variety of external networks and converts it to the form that can be transmitted on the KNX bus, through the KNX bus to the designated smart home device, which controls and manages the internal devices of the home network. This paper elaborates the design and implementation process of the hardware and software of smart home gateway: the hardware mainly includes the design and implementation of Ethernet interface, KNX module, wireless network module and the main controller; the software includes the design and implementation of the main application software program, TP-UART-IC communication program, Ethernet communication program, and wireless communication program etc. Fianlly, through the analysis of the actual communication data between the gateway and the external network, this paper shows that the design of the KNX smart home network has basicly reaches the design requirements.