The 21st century is an era of information. The high-tech development of networks, microelectronics, optoelectronics, and communications is rapidly developing. The security system has gradually evolved from the original analog products to digital, networked, and intelligent with the development of information technology and the entire information industry. Monitoring products. At the same time, the people's living standards have improved, and the concept of security prevention has also expanded from previous enterprises and institutions to home users. More and more families have installed fireproof and anti-theft devices such as magnetic, infrared and smoke sensors. It has become an inevitable trend to realize smart home security systems.
The composition of the intelligent security system
The intelligent security system mainly consists of four parts: video surveillance host, peripheral wireless alarm module (remote control, door magnet, infrared, smoke, gas, etc.), user receiving terminal (mobile phone, client player, e-mail) and system management platform. . It is a set of network-based digital image transmission and alarm management system, which provides users with a visual, simple and fast way to obtain small area security information. The perfect combination of network camera and alarm device is sent through the system platform. The alarm information and the camera view the monitoring area to determine a reasonable disposal method.
For example, any changes in the user's home or shop (illegal intrusion, fire, gas leaks, etc.), the smart security system informs the user in the form of text, pictures or video clips, and records a video or a picture when the alarm occurs. Save on the host SD card or send it to the platform server. Users can also view their home or business in real time from their mobile phone or the Internet anytime, anywhere.
Integration and communication are the core of smart security
According to the Ministry of Construction's Housing Industrialization Promotion Center, the residential community should implement six intelligent requirements, including the implementation of automatic monitoring and management of safety and security: automatic alarm for the fire and harmful gas leakage of the house; the burglar alarm system should be installed with infrared or Microwave and other types of alarm detectors; the system should be able to network with the computer security integrated management system; the computer system can centrally manage and control the anti-theft alarm system.
It can be seen from the six requirements put forward by the Ministry of Construction that the intelligent security system of the family must play its role and must rely on the joint operation of its various subsystems to provide integrated feedback on various environmental information. In short, the foundation of the smart home security system is the communication network, and its technical core is embodied in the system integration and related communication protocols, so as to achieve mutual compatibility and exchange between devices.
In order to ensure the normal transmission of information, there must be a set of conventions or rules regarding the order of information transmission, information format and information content. This set of conventions or rules is the network protocol. The smart home communication network is divided into wired and wireless. The wireless protocols mainly include: zigbee, z-wave, RF, Bluetooth, wifi, EnOcean; wired communication protocols mainly include: RS485, RS232, Modbus, KNX, BACnet.
RS485 and KNX are currently widely used in the field of wired smart home. RS485 is a standard that defines the electrical characteristics of drivers and receivers in balanced digital multipoint systems, as defined by the Telecommunications Industry Association and the Electronics Industry Alliance. The digital communication network using this standard can effectively transmit signals under long-distance conditions and in an environment with high electronic noise. RS-485 makes it possible to configure inexpensive local networks and multi-drop communication links. Currently, there are quite a few wired smart home manufacturers that use the RS485 protocol.
The KNX bus is a system independent of the manufacturer and application, connected to KNX media through all bus devices (such as twisted pair, RF, power line or IP/Ethernet), which can exchange information. The bus device can be a sensor or an actuator for controlling building management devices such as lighting, shading/blinds, security systems, energy management, heating, ventilation, air conditioning systems, signal and monitoring systems, service interfaces and building control systems, Remote control, metering, video/audio control, large appliances, etc. All of these functions can be controlled, monitored and signaled through a single system without the need for an additional control center.
At the same time, in 2013, KNX was accepted by the National Standardization Administration Committee to launch the “Control Network HBES Technical Specification – Residential and Building Control System†(HBES GB/T 20965-2013) as the recommended national standard.
In the communication of the basic network between smart devices, wired connections are mostly used, and wireless connections are often used in the interaction between devices and users. In smart home systems , the application of wireless network technology to home networks has become an unstoppable trend. Because wireless networks can provide greater flexibility and mobility, eliminating the expense and effort of cabling, it is also very convenient to link and control with mobile phones.
Conclusion
The smart home security system for home smart security is a family home platform that combines computer technology, network communication technology and automatic control technologies to integrate various application subsystems related to family life. The effective implementation of its security system must make rational use of the combination of wired and wireless communication networks, so that the intelligent security system fully mobilize the security equipment in different application environments, providing people with a more comfortable, efficient, convenient and safe modern living environment.
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