With the rapid development of technology and the continuous improvement of living standards, people's demand for intelligent home life has gradually increased. In order to meet the needs of market development and meet people's needs, many manufacturers have also developed and launched various kinds of products. Smart home products. For example, many smart home products use advanced computer technology, embedded systems and network communication technologies to enable household calls, photo messages, home security, information release, multimedia, home appliance intelligent control, IP telephony, etc. through digital transmission. It can use smart terminals, computers and mobile phones to remotely monitor and remotely manage electrical equipment in the home. At the same time, smart home systems based on residential broadband network applications can also provide more in property management, fire protection, water, electricity, coal, etc. The orientation service creates an efficient, comfortable, safe and convenient living environment for users. This article will take a villa project in Changsha, Hunan as an example to introduce the application of digital home system in practice.
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An Introduction
In the villa, the whole system adopts the principle of hierarchical and distributed control, and utilizes modular design technology to organically combine many functions, and integrates the complex technologies of each subsystem to achieve organic integrated centralized control. The whole system has three layers of equipment, which constitutes a tree-shaped distributed control communication network. The system features are as follows:
• The system adopts TCP/IP transmission mode, and the system can provide management capacity of more than 20,000 households;
• The system uses all-digital and embedded technology, and audio, video and control signals are digitally transmitted;
• Soft coding/soft decoding of system video adopts standard video compression protocol H.264, soft coding/soft decoding of audio adopts standard audio compression protocol G.729;
• The system adopts object-oriented design method and Shell technology, has a GUI library of embedded system, and has remote upgrade of terminal software of home intelligent system;
• The system provides an API interface to provide an integrated platform for external vendors of smart home systems;
• The system has the polling check function of line and equipment running status and fault. When the fault occurs or is damaged, it can promptly and reliably report the alarm in the management center; the whole system should have strong anti-interference and anti-lightning function;
• The built-in alarm system of the system meets the requirements of the C-level standard of the Ministry of Public Security GB12663 Public Security Department.
System composition
It can be understood from the network structure diagram that the digital smart home system is mainly composed of a digital home intelligent terminal, a public gate intelligent terminal (unit door machine, a wall door machine), an administrator machine, a center server, a community network wiring, and the like.
â—†Indoor terminal
Home intelligent terminal, with module can be realized: building visual intercom, home appliance control (electrical appliances, lighting, curtains, etc.), security alarm (8 zones), telephone function (supporting 4 telephone extensions), information management (community information, visitors) Digital photo, intelligent control, digital home, intelligent control.
â—†Common gate terminal (unit door machine)
The two-way video intercom and the call center can be realized, and the image and sound of the visitor can be stored in a dynamic manner. When the visitor calls, the image is automatically captured and sent to the management center, and each visitor's information will be faithfully recorded and stored. It is convenient to inquire; it can also publish graphic advertisements on the public gate terminal, support password and swipe card opening function, and the fault of the user terminal can be automatically detected and reported to the management center.
â—†Management Center Equipment
The management center has information processing and publishing functions, and provides open software and hardware interfaces to facilitate access to software and hardware from other vendors. The equipment parts mainly include: administrator machine, management server and software (including household management module, event management module, equipment management module, parameter management module, IC card access control module, advertising service module, information release module, etc.).
â—†System administrator machine
The system administrator machine can be controlled by computer. The management terminal adopts “PC+ management software†to realize the functions of the management machine. It not only has the functions of intercom, monitoring, calling, unlocking, alarm event processing, electronic map, etc. of the traditional management machine, but also convenient. Upgrade and maintain, and provide standard open API interface protocol, which can be seamlessly connected with other vendors' products and different systems.
â—†Network cabling construction requirements
The network cabling part mainly completes the signal transmission of system voice, video, control, etc. It consists of computer network and integrated wiring, and requires independent local area network.
The network construction requirements are as follows:
• The system uses a separate LAN and does not mix with the community broadband for networking;
• It is recommended to adopt a three-layer (access layer, aggregation layer, core layer) network design, and the core switch needs to have network management functions;
• The bandwidth of the trunk of the residential network is 1000 Mbps, and the network of the household access port is 10 Mbps, which requires the network 100M to the building and 10M to the household;
• Cables must meet the requirements of integrated wiring specifications when wiring.
The villa is a mixed structure of single-family and townhouse. It uses public gate terminal equipment as the wall door machine of the whole villa area, providing the first all-digital safety information channel for the villa area. The public gate terminal equipment equipped with the system can be installed, and the security information is provided to the business. The management center equipment and the system administrator machine are used to build a fully digital management center for the villa area to communicate with the property owner. It provides a high-speed information communication channel, which provides effective protection for the daily life of the owner and the safety of the home.
For the villa-type home, in addition to the superior location and beautiful environment, it also provides the owner with a variety of functional applications, and the biggest feature of digital home is reflected in the multi-functional integration. Using high-tech means to integrate communication equipment, home appliances, lighting, curtains, intercom systems, security systems, audio and video, entertainment, home environment, monitoring system, Internet, etc. in modern life through automated procedures, which will be practical and comfortable. Safety, entertainment and intelligence have been combined to create a new lifestyle for the owners.
Introduction to the use of various functional modules in the house
â—†Home appliance module
The module can communicate with the host, transmit control signals and implement home appliance control. By adding third-party home appliance interface modules and related control modules (control methods include power carrier, bus control, RF control, etc.), the vendors supported are Ammins, Bocce, Sobo, Ruilang, ABB, Qisheng, etc. .
â—†Alarm module
The alarm module can communicate with the host, transmit control signals to implement security alarms, and perform telephone alarms when the zone is triggered.
â—†Telephone switch module
The telephone exchange module can communicate with the host to transmit the analog front door signal and the telephone signal, and realize visual intercom between the indoor unit and the analog front door. The module can provide four telephone extension interfaces, and four telephone extensions, and the telephone will be connected. Signals are distributed to allow the indoor unit to have a telephone function.
â—†Power module
The power module can provide 12V voltage to 1 alarm module and 1 home appliance module, and provide a set of 12V, 48V, 75V voltage to power the telephone module. In addition, the power module can also provide power supply for one indoor unit; and the indoor sub-extension and The alarm detector power supply in the room needs to be separately provided.
The system's network door front can be installed at the garden entrance of the villa to realize independent visual intercom and monitoring functions for the visitor, which provides a guarantee for the internal security of the home. To provide an elegant and comfortable living environment for villa life, it is inseparable from the adjustment of the light environment, the convenience operation of household electrical appliances, etc., using the home appliance module of the system to integrate the lighting system, household appliances, curtains and other equipment of the home through The indoor terminal or wireless remote control performs centralized control. According to the different functional application areas of the home, different scenes are set, so that you can go to every place and want different applications and environments.
High-end residential buildings should also reflect professionalism, especially in the aspect of security alarms. The alarm module of the system just meets this point. The alarm module is designed according to professional alarms and provides 8 completely customizable zones. And with telephone, city 110, regional network alarm function, so that the home is more secure, the owner's peace of mind.
Another feature of the villa house is that the room is large and the area is large. One indoor extension can never meet the video intercom application of this home pattern. With the telephone switch module of the system, the ordinary telephone of each room accesses the In the switch, the phone can be used as a video intercom extension in addition to the normal phone function. At the same time, it can be used with your mobile phone to let you hear the visitor's call no matter where you are.
System function advantage
Through the use of the smart home system, many intelligent application requirements of the villa user can be met, as follows:
• Surveillance and intercom: realize front door machine, public door visual intercom and surveillance;
• Household video call: It can realize the intercom function of the household, the call is not busy, and it does not affect the call of other households;
• Appliance control: You can control and adjust the air conditioner, lighting, curtains, TV, audio, etc. at home. When you go out, you can switch all the appliances on/off, convenient and worry-free;
• Reservation control: The indoor intelligent terminal sends a command to the home appliance control module through the home appliance control module to realize the control function. You can easily realize the function of opening/closing, scheduling, etc. of the power socket, switch, air conditioner, etc. in each functional area of ​​the room. Monitoring the working conditions of home appliances, playing a role in energy conservation;
• Alarm linkage function: When the zone is triggered, the indoor light automatically lights up, the terminal starts the camera that comes with the machine to record, and automatically informs the owner's mobile phone by SMS or voice, and reports it to the management center and the linkage 110 alarm center;
• Call transfer, call: When the user is out, the call from the visitor can be transferred to your mobile phone, and important guests will not miss it;
• Information function: The terminal can receive various notifications, related services, and mobile phone messages sent by the center and mobile phone, which makes property management more efficient and service better;
• Guest photo message: When the user is not at home or is not convenient to answer, the visitor can leave the audio and video information according to the voice prompt of the ladder. The user can check through the indoor unit to easily grasp the information of the visitor;
• Local message: If you have something to go out, let your family know that you no longer need paper notes, open the smart terminal, and easily mess up; • Multimedia playback: The terminal can easily access and play your favorite music and video movies, and enjoy the video and audio;
• This camera takes pictures: The terminal supports 2GSD card, which can directly store pictures on the SD card. You can browse photos on the terminal and set your favorite photos as personalized desktops.
• Elevator control: The owner can automatically summon the elevator to the owner's floor at home, no longer need to wait for the elevator to be upset, humanized, and experience the honor of the exclusive elevator;
• Remote control: By using the mobile phone to surf the Internet, send text messages, open the computer to access the Internet, you can easily remotely disarm and control the home appliance, and also carry out all-round monitoring to confirm the safety of the elderly and children at home.
The above functions are implemented in the integration and integration of the digital home indoor terminal. Through the touch screen of the indoor terminal, you can freely control the lighting, curtains, various infrared household appliances, security alarms and so on. In addition, through room temperature control, light control and other linkage control scenarios, not only bring energy to the business, but also provide an elegant living environment. At the same time, using the Internet and mobile communication network, you can use your computer and mobile phone to monitor and control home security, home appliances and scenes anytime, anywhere. The owner who lived in the villa was busy for a day, drove back to the door, automatically sensed and recognized the owner, automatically opened the garage door, and the front door, closed the security system, opened the indoor curtains and air conditioner, and sounded the family background music. Welcome the owner's back, pre-burned hot water, and dinner waiting for your use, this is the high-quality life photo brought by digital home.
Conclusion
Compared with the ordinary intercom system, the above-mentioned smart home solution has unparalleled advantages in terms of communication reliability, system security, cost economy, construction convenience, networking convenience, and signal clarity. While focusing on optimizing system cost, the case is also very flexible and efficient, and the system is stable and reliable. It not only provides real estate value-added products, but also creates high-efficiency and high-quality living space for users.
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