A few years ago, the smart mansion that Bill Gates invested heavily in attracted people's attention to smart home. However, smart home is also regarded as an unreachable dream by many people, which is far away from the lives of ordinary people. In the past few years, dreams have gradually become a reality in life: many residential quarters have more or less considered smart facilities in the design stage, a few high-end residential quarters have begun to support relatively perfect smart home systems, and more and more relevant institutions have begun to intervene in the field of smart home. Smart home is becoming a big industry with huge market potential.
Smart home is an efficient, comfortable, safe and convenient living environment based on residence, which integrates the functions of architecture, network communication, information appliances and equipment automation, and integrates the system, structure, service and management.
Smart home has four basic elements: structure, system, service and management. Structure refers to the shell of the house, and system refers to the intelligent hardware equipment of the house (including intelligent system). Service and management are the weakest links in the construction of smart home in China at present.
In the process of building a smart home, we must first establish a communication network in a family to provide the necessary digital information channels for family information. Under the control of the operating system of the home network, we can control all the household appliances and equipment on the home network through the corresponding hardware and actuators. Contact with the outside world through the same channel also constitutes a communication channel with the outside world, so as to exchange information with the world outside the family and meet the needs of information exchange.
The basic goal of smart home is to provide people with a comfortable, safe, convenient and efficient living environment. From the point of view of comfort, people's personalized demand for living environment is getting higher and higher, even requiring the feelings of hearing, sight, taste and smell; A safe family system includes the safety of personal and family property, as well as the safety of family equipment. In order to realize this security system, it is necessary to provide relevant defense measures such as electronic entrance guard, intercom system, electronic anti-theft system, glass breakage detection and alarm system, indoor tap water detection and alarm system, fire alarm system, indoor toxic/harmful gas detection and alarm system, and outdoor/remote meter reading system of three meters (gas meter, water meter and watt-hour meter). In addition, there is a convenient way of life, which can control all household appliances with a universal remote controller, realize telemedicine and distance education, and realize an efficient working mode.
At present, it is generally believed that smart home not only has a strict and accurate technical system in home security monitoring and home management, but also must adapt to the future network home life, such as home office, entertainment and communication.
Smart home is an evolving concept. Technology is changing with each passing day, and the degree of home intelligence is also different. It is worth noting that intelligence is not equal to automation, and just installing some automation equipment is far from being called intelligence.
Smart home is a typical 3C(Computer, Communication, Consumer) system integrating computer, communication and consumption, and it is the end of this huge network of intelligent society. Its original functional concept comes from the interconnection of telephone, TV, CD-ROM, digital camera, computer and various household appliances/devices to realize remote control and monitoring of information exchange between devices.
Smart homes cannot exist in isolation. Smart home is generally an extension of wireless city. Generally speaking, families are always in a community. Imagine that if the community does not realize the basic intelligence, the intelligence of the family in it will become passive water and a tree without roots. In order to create a "smart living environment", Nano Deben has launched a comprehensive solution and a full range of products, collectively known as "nano-digital home". "Nano-digital home" creates an intelligent living environment, which is divided into three progressive levels: wireless city, wireless city and smart home, among which smart home is the theme and focus of wireless home creation.
The ideal smart home should realize the following three main functions:
The first is to control, adjust and monitor white goods and other equipment, including microwave ovens, washing machines, lamps, electric curtains, burglar alarms, automatic door smoke detectors, harmful gas detection devices, temperature and humidity controllers, air volume regulators, various manual switches and remote controllers.
Second, the information communication channels between black household appliances and other video equipment and the outside world, including desktop/handheld computers, televisions, video recorders/cameras, VCD/DVD, digital cameras, etc. At the same time, they can be controlled and monitored.
Thirdly, remote control and information exchange can be realized through external interfaces, such as telephone lines, CATV cables, mains power lines, twisted-pair cables and wireless communication methods.
The functions mentioned above involve all kinds of information, such as household appliances such as electric lights and information equipment such as computers. With so much equipment information, how is smart home distinguished and controlled?
From the information flow media, smart home can be divided into two parts: control network and information network.
The control network is mainly used to control the running state of various devices in the home, such as the on/off and brightness control of lights, the on/off control of air conditioners, the control of temperature and air volume, the signal acquisition and execution of home security system, the input of various switching values, the on/off control of electric curtains, the detection of indoor physical quantities (such as temperature, humidity and various gas contents), and the four meters (gas meter, electric meter, water meter, etc.
The characteristic of control network is that the information transmitted on this network is mainly control information and some physical parameters. The frequency of the signal is relatively low, so the transmission rate can be relatively low, which can generally meet the requirements in tens of Kbps, but the reliability of information transmission is relatively high. This is because the information it transmits is the control information of various devices, and its errors may not only lead to the abnormal work of the devices, but also lead to the damage of the devices. Therefore, the main technical problem of control network is the reliability of transmission.
Devices connected to the information network include computers, televisions, audio systems, video recorders, digital cameras and mobile phones. Audio and video signals are mainly transmitted on the information network, and its frequency bandwidth is generally as high as several megahertz, so the information transmission rate on the information network is required to be relatively high, which should generally be above 10Mbps. But relatively speaking, its reliability requirement is not as high as that of control information. Because video and audio information are processed before and after transmission (such as signal compression, coding/decompression and decoding), these processes have certain fault tolerance, even if there is instantaneous error, it only affects instantaneous sound or image error, and has little influence on the future operation of the equipment. Therefore, the main problem to be solved by information network technology is transmission rate (bandwidth), that is, to increase the bandwidth of information network as much as possible under possible conditions.
Smart home integrates household electrical equipment, lighting control system, safety control system and energy management system through network bus and control platform. At present, the development trend of smart home is from centralized control to distributed control. Compared with centralized control, distributed control can not only reduce wiring, but also improve the reliability of the system. When a node fails, it only needs to be removed from the network, and other nodes will not be affected. Bus coupler, home appliance control signal driver, home appliance, universal remote controller, telephone interface and home gateway constitute the smart home control network, which supports the skeleton of smart home.
In a perfect digital home application, it includes the comprehensive integration of various high technologies, including computer software technology, computer network technology, computer password technology, "plug and play" technology, image processing technology and sensor technology, which support the nervous system of smart home. Nano Deben uses six technologies to provide core technologies and terminal products for smart home in terms of network, automatic control, security credit identification, etc. Nano Deben helps people realize all-round digitalization, so that all aspects of people's existence can be cared for by information technology.
As a pioneer in the field of smart home, NMDB smart home has fully realized the perfect combination of network platform function and six technologies. The NMDB smart home solution enables all kinds of information-related communication equipment in the family, such as computers, telephones, household appliances, home security equipment, etc., to communicate with each other through the network platform and connect to the management center through the gateway for centralized/remote monitoring, control and family affairs management, so as to realize the exchange of all information in the house, such as voice, image, sensor, disaster prevention, anti-theft, controller, data, etc., and to keep in touch with the outside world forever. The digital technology needed for home environment is mainly embodied in TV, games, audio, telephone, control, security, measurement and so on, involving TV broadcasting service, voice communication service, network communication service and so on. In these fields, digital technology has been widely used in NMDB smart home solutions.
I believe that in the near future, thousands of families in China will become the owners of smart homes.
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