Smart home is based on residential platform, using integrated wiring technology, network communication technology, security technology, automatic control technology, audio and video technology to integrate home life related facilities, and build efficient management system for residential facilities and family schedules. Home safety, convenience, comfort, and artistry, and achieve an environmentally friendly and energy-saving living environment.
The most commonly used applications are lighting, water heaters, air conditioning, intrusion monitoring, smoke alarms, video surveillance and intelligent control of curtains.
1. Communication technology in smart home
1.1 Comparison of wired communication control and wireless communication control
The communication technology in the smart home can be divided into wired communication technology and wireless communication technology.
(1) Wired control
The structure of the wired control is to place the controller in a strong electric box, and the switch and the central control host are respectively controlled by the weak electric control line. Wired control uses wired communication technology.
Advantages of wired control: safe and stable, undisturbed; shortcomings of wired control: high requirements for the program, high requirements for line erection, and difficult to expand and change later. This method is used in the early stage of the development of smart homes. It is a change from industrial control. It is mainly used in large-scale commercial places and other places where people have centralized management, and is gradually replaced by wireless communication.
(2) Wireless control
Wireless control uses wireless communication technology to achieve control of the device. Advantages of wireless control: simple installation and wiring; shortcomings of wireless control: anti-interference is worse than wired control, and signal coverage is affected by buildings.
1.2 Wireless communication technology in smart home
The wireless communication technologies in smart homes mainly include:
1 infrared communication technology;
Radio frequency technology less than 1 GHz, such as 2433 MHz;
3 Bluetooth technology;
4ZigBee communication technology;
5Z-Wave technology;
6WiFi technology.
Each technology has its advantages and disadvantages, but regardless of the communication technology used, if you want to achieve remote control of home equipment, the equipment needs to access the Internet. The WiFi communication technology is the mainstream technology for the handheld terminal to access the Internet. Devices that use other communication technologies other than WiFi technology need to be converted by the home gateway to access the Internet. For example, a smart home system using ZigBee technology needs to be in the home gateway. Increase the function of ZigBee to WiFi.
The main advantages of WiFi technology in smart home applications are: WiFi intelligent nodes can directly connect to wireless routers to access the Internet; no need for home gateways, nodes can be arbitrarily expanded; will not destroy existing decoration; smart phones can carry out local area networks Control and remote control.
Of course, WiFi technology has its shortcomings compared to ZigBee and 433 MHz RF communication technology: power consumption is too large and price is high. However, with the introduction of energy-saving technologies and improvements in chip technology, power consumption and price issues have gradually been resolved. Since the WiFi module is a standard configuration for notebooks, tablets, and smart phones, smart homes based on WiFi technology will gradually be promoted and applied, and the market prospect is broad.
The following focuses on the serial WiFi module to illustrate the application of WiFi in smart home.
2. Serial WiFi for use in smart homes
2.1 Serial WiFi Overview
The WiFi module or the WiFi network card used on the computer needs to run on the basis of the operating system, and the hardware resources of the host are very high. For example, the general industrial equipment and the household electrical equipment cannot directly drive such a WiFi network card.
A Brushless dc electric motor ( Bldc motor or BL motor), also known as electronically commutated motor (ECM or EC motor) and synchronous DC motors, are synchronous motors powered by direct current (DC) electricity via an inverter or switching power supply which produces an alternating current (AC) electric current to drive each phase of the motor via a closed loop controller. The controller provides pulses of current to the motor windings that control the speed and torque of the motor.
The construction of a Brushless motor system is typically similar to a permanent magnet synchronous motor (PMSM), but can also be a switched reluctance motor, or an induction (asynchronous) motor.
The advantages of a Brushless Motor over brushed motors are high power-to-weight ratio, high speed, electronic control, and low maintenance. Brushless motors find applications in such places as computer peripherals (disk drives, printers), hand-held power tools, and vehicles ranging from model aircraft to automobiles.
12v brushless motor,12v brushless dc motor,12 volt brushless dc motor,12v dc brushless motor high torque,12v high rpm brushless motor,12v brushless dc motor 10000 rpm
Shenzhen Maintex Intelligent Control Co., Ltd. , https://www.maintexmotor.com