Application prospect of the hottest smart home sys

Application prospect of smart home system and Bluetooth technology

Abstract: This paper introduces the concept of intelligent residential district, Namely "Load 1 stretching" discusses the structure of household intelligent system and several aspects of household appliances intellectualization; introduces the characteristics of Bluetooth technology, and reveals that Bluetooth technology is the best communication method of household informatization. Bluetooth module has been paid attention to all over the world because of its advantages of low power consumption, good compatibility, high reliability and no connecting line.

key words: intelligent household appliances in residential areas intelligent Bluetooth technology Technology wireless communication l intelligent residential quarter intelligent residential quarter refers to relying on advanced equipment and scientific management mode, using computers and related high-tech, combining traditional civil architecture with computer technology, automatic control technology and information technology to intelligentize the use function of residential buildings in a certain region, so as to save energy, reduce labor costs, and improve housing 45 ° (± 22.5 °), 90 ° (± 45 °) 180 ° (± 90 °), 180 ° (± 90 °), 540 ° and other standard test modes and user-defined test modes and other power lines zigzag to choose the automation degree of property management, security and information services in the residential area, so as to provide a safe, comfortable, convenient and fast home environment for residents in the residential area, referred to as 4C technology. With the improvement of people's living standards and the gradual realization of the grand goal of building a well-off society in an all-round way, traditional residential areas and buildings are often no longer favored because they cannot provide necessary communication facilities and good office automation support systems. The intelligent residential quarter includes three subsystems: security, management and monitoring, and information network. As shown in Figure L, each household is the node of this subsystem. 2 smart home system household appliances intelligence is the premise of smart home. Generally speaking, household appliances can be divided into four categories: (1) home theater network; (2) Computer subsystem; (3) Subsystem; (4) Household appliances, such as refrigerators, washing machines, microwave ovens, meter readers, etc. In the smart home system, each appliance is intelligent and managed by an embedded computer. They are assigned a unique IP address in the local area of the household, so the homeserver came into being. The home server adopts modular design, which is a kind of home intelligent node module. This kind of home server can be called intelligent control network data terminal (NDT), also known as smart home controller. Its main functions are: (1) communication function. It is connected to the external broadband network and represents the node of a resident on the community network; In addition, intelligent household appliances should be connected by it to become a household local network to realize the networking of home; (2) Management functions. Manage and transmit information to household intelligent appliances. For example, the amount of food in the refrigerator can be printed out by computer; Receive the control commands sent by the owner through email, voice or operation panel to control the opening/closing of the access control system, the start/stop and adjustment of the air conditioner, the operation of the washing machine, and the adjustment of the home theater system; Receive the status of gas, water and electricity meters from the meter reader and transmit them to the meter reading system of the community, etc; (3) Information display function. Receive the notification from the intelligent system of the community and display it; Status display of household appliances; When a fault occurs, it can automatically display the faulty appliance and prompt how to deal with this fault. 3. The communication technology in the existing local network home network is a kind of local network, which can provide audio-visual entertainment, communication, equipment operation and control, home safety protection and other functions, and has a large amount of information circulation. The key to home networking is to connect smart appliances in the home. It is mainly divided into wired and wireless connection modes. 3.1 wired communication technology this is the home network of intelligent households that has been realized at present. All kinds of information in households, communication between household appliances and equipment, and communication within and outside the home are realized through home bus. This bus can be RS-232, RS485 bus, or various field buses. Coaxial cable and twisted pair are used to connect intelligent household appliances and home servers into a star structure. This method has reliable data transmission, long communication distance and is not restricted by the shape of the room. However, because there are too many signal lines, in order to ensure the beauty of the walls and rooms, it must be planned and installed in place before the residents live. Moreover, after the patch panel is installed on the wall, the position of the corresponding electrical appliances is fixed, which is inconvenient to adjust. Each electrical appliance has a power line and signal line connected to the wall, so the smart appliance and the wall are not beautiful. 3.2 wireless communication methods wireless communication methods include home RF network, infrared, ieee802.1 l-compliant devices and Bluetooth technology. Infrared (IR) connection standard (called IrDA standard) has been adopted by many companies. Infrared light is used to transmit signals between devices. Because infrared light cannot penetrate solids, the two devices must be close and fixed in order, and there is no object separation between them. The minimum rate is 115kbps, the old infrared standard rate is 4Mbps, and the new standard rate is 16mbps. Infrared communication has the advantages of high speed, low cost, safety and low power consumption. At present, it has been used in scanners, air conditioners, televisions, portable computers and other equipment. Because of its short signal transmission distance and the limitation of receiving angle, it is not suitable for application in home networks. Completely clean the bearing with gasoline. Home RF network is a wireless network technology specially designed for home and small business networks, using 2.4GHz frequency band. The connection distance is less than 13m, the speed can reach 10Mbps, and the price is cheap and easy to install. Each network can allow up to 127 devices. However, its power consumption is large, it is not suitable for portable equipment applications, and its work is unstable. Ieee802.1l devices are similar to Ethernet without cables