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Smart socket solution
Smart sockets are equipped with microprocessor cores, which can enter digital editing and processing. However, the existing smart socket products have relatively simple operations, only simple functions such as monitoring, security, and control, and are far from digital and terminal control. This is completely unable to meet the application needs of technological home programs. The following mainly discusses some cases of smart sockets used in technological home programs, and introduces a new research method for smart sockets.
1. Internet of things technology and smart socket
The Internet of Things (The lntem et of Things) means that the entities in the object world are equipped with embedded programs with specific sensing functions, computing functions and execution functions, making it an 'intelligent entity', and then through computer equipment to achieve Data transmission, coordination and processing, thus the connection between people and things, things and things. The Internet of Things will be one of the important directions for the development of science and technology in the future. It can be estimated that it will be popularized and used on a large scale within ten years, and it will grow into a high-tech industry with a scale of hundreds of millions.
Home technology is one of the important applications of the Internet of Things. Its basic platform is family housing. The method is to use advanced computer technology, communication technology, sensor technology, and management and control procedures to collectively manage and control all electrical facilities in the household. Monitoring, because it creates a convenient, comfortable, efficient, safe and environmentally friendly living atmosphere. In the future, the research and development of smart sockets will be an important part of the technology home, and the technology home is a typical application of the Internet of Things. Electrical facilities such as various lighting, Internet TV computers, refrigerators, washing machines, and security equipment are networked through digital home network programs to form digital control.
2. Classification of smart sockets
There are many smart sockets with different functions in today's society, which can be roughly divided into the following categories:
1. Leakage cut-off smart socket
This type of socket includes the function of cutting off the power supply by leakage, and cutting off the power when overloaded. As long as the current greater than the specific limit is not combined with the neutral line to form a circuit, it will be judged as leakage and immediately cut off the power supply. Similarly, when encountering the supply voltage It will automatically cut off the power supply to ensure the safety of electronic equipment when it is abnormal, such as too high or the current used is overloaded;
2. Time-setting smart socket
The most convenient part of this type of socket is that it can meet people's time-sharing and intermittent needs for power supply. For example, when the unit price of electricity at night is cheaper than that during the day, the power supply for boilers, washing machines and other equipment is automatically supplied, which can reduce expenses for users. This type of ordinary socket will have the ability to set the time, and can edit and control all the sockets of the socket cover separately, and control the power supply of different sockets to be turned on and off according to user requirements;
3. Mainstream controlled smart socket
Receptacles of this classification usually have a single primary circuit, and the others are secondary circuits. For example, when the host computer has no power, it will determine that there is no current flowing through the main circuit, and then turn off the power supply of the entire socket. Some machines such as keyboards, monitors, mice, etc. are out of power, so that the town can reduce power consumption during standby. It can also ensure the safety of using electricity;
4. Remote control smart socket
Each of the sockets of this type can use a wireless remote control for remote on-off control, so it will require at least one remote control, and the method of information transmission is usually infrared, sound control or small wireless;
5. Counting smart socket
The function of such a plug is to allow the user to know the power consumption of a single electrical appliance. It is also similar to the function of a bi-phase multi-function ammeter, and can feed back data such as electricity, power, and voltage of the electronic equipment in the socket. There is usually an LCD screen and some buttons on such a socket, and then it can also transmit information to a computer or mobile phone, and form a report through the supporting software, listing the power consumption status of the machine in detail.
3. System composition of smart home
There are three main components in the smart home system, the smart unit, the master controller, and the local and terminal control.
1. Intelligent unit
Including smart sockets, smart light programs, smart security programs, information equipment, etc. The general use of smart sockets is to monitor the power consumption of the facilities on the sockets and control the power on and off of the equipment. If the equipment is allowed, it can also be controlled. The operation of the equipment; the smart light program and the smart security program use the corresponding camera and sensor to view the real-time situation, and transmit the real-time situation data to the general control program, and can also start the program alarm, light on and off, etc. Contains networking functions, so the general control program or terminal can be used to control the operation situation;
2. General controller
The general controller is divided into built-in control program and hand-held control program. The built-in control program is usually loaded at the entrance, and the hand-held control program is convenient, and the user can operate it anywhere indoors. The master controller can monitor or control the status of all facilities in the technology home program through the buttons on the control screen, and can perform equipment on-off, status monitoring, light control, security control, etc.;
3. Local and terminal control
The local calculator can carry out contact communication through the wired connection method and the embedded control program. With the help of the control program on the calculator side, it is convenient to implement data editing and status monitoring for the home program in the calculator. Because the embedded general control program is connected to the Internet, users can use the terminal's networked computer to implement terminal login and editing. Similarly, users can use data traffic to log in to the Internet on mobile phones to achieve terminal management and control. The terminal settings must have corresponding connection permission operations to ensure the security functions of the technology home program.
4. Functional scheme design of smart socket
1. Smart socket function standard
Because of the needs of technological home programming, we must develop a new smart socket. It must include the advantages of technology and digitalization. In addition to the basic functions of power on and off distribution, it usually has the following functions:
(1) Control function. The smart socket should be able to pass the on-off circuit to control the power consumption of the equipment on the socket, or to command the password to the information port of the equipment in real time. The controlled equipment includes water heaters, washing machines, TVs, etc.;
(2) Communication function. The smart socket should communicate with the general control program, and transmit information to the general control program or reflect the instructions of the general control program to ensure the normal operation of the technology home program. The smart socket and the general control program are combined into efficient communication, and the communication needs to be fast and stable;
(3) Monitoring function. This function can monitor and view real-time operating conditions, such as current, power, power and other data, users can understand the load status of the equipment, operating power, consumption during standby, etc., and give users a reference value;
(4) Other functions. Like setting time on-off, short-circuit protection, etc.
2. Design scheme of smart socket
The overall circuit program of the smart socket uses a microprocessor (MCU) as the center, and other components include signal detection, power switching, communication unit, power control, etc.
(1) Microprocessor: Microprocessor is the center of the circuit system. It is aimed at the testing, control, communication, etc. of the overall program during operation. Therefore, users should choose 16bit or 32bit microprocessors with good electromagnetic compatibility, such as STR 711 , At the same time, add hardware on-off to prevent crashes.
(2) Power switching: The function of this link is to implement DC-AC switching of 220 V AC, and derive the DC voltage value required in the circuit program, such as +6V, +3V, and the derived power must meet the program operation needs. At the same time taking into account the quality of electromagnetic compatibility."
(3) Power control: Use a microprocessor to control the pull-in of the relay, and then change the power transmission of the load. The limit capacity of the relay should be greater than the maximum power of the load. The relay circuit should be equipped with capacitors and diodes, so that the reverse current and The high voltage can be dissipated to protect the entire circuit and prevent breakdown.
(4) Signal monitoring: the initial strong electric signal of current and voltage is converted into a weak point signal through a manganin sheet or a decompression resistor, etc., and then imported into a special computing chip, which includes D/A switching and numerical calculation circuits. , you can operate several channels of current and voltage effective values, or power calculations, and the edited values are received by the MCU and then edited and calculated. The operation accuracy can meet the level of 1.0 or so.
(5) Communication unit: The smart socket uses wired or wireless communication and the general control program to implement information exchange to form a communication system. Wired communication can adopt the low-voltage circuit line co-wave method, and the low-voltage co-wave communication passes through the source of the power line, which is conducive to networking. But because the low-voltage line has a lot of interference noise, the communication speed and stability are not very high. For wireless communication, ZigBee and other micro-power wireless technology can be selected, and the communication speed and stability are good.
The program of the smart socket adopts the method of foreground short circuit and background editing. The background program includes communication frame editing, detection value marking, power supply control and other aspects, and the foreground adopts short circuit to quickly execute the instructions of the general control program. The smart socket must have a specific communication system address and facility address. The network address must be the same as the general control program. The facility address is the only one that exists in the network.
5. Summary of Smart Socket Solution
This book mainly discusses the research method and basic functions of the new smart socket program. It contains many functions such as technology control, local monitoring, communication networking, etc., and can meet the design requirements of technology home programs and the Internet of Things. The use of smart sockets cannot be done alone, it must be combined with the technology home program, and then play a role in the program. Therefore, due to the rapid growth and use of technological home programs, the application of smart sockets will gradually become more and more popular.
The above are the details of the smart socket solution introduced by Shenzhen Zuchuang Microelectronics Co., Ltd. for you. If you have electronic function development needs for smart home, you can rest assured to entrust it to us. We have rich experience in custom development of electronic products, and can evaluate the development cycle and IC price as soon as possible, and can also calculate the PCBA quotation. We are a number of chip agents at home and abroad, including MCU, voice IC, Bluetooth IC and modules, wifi modules. Our development capabilities cover PCB design, single-chip microcomputer development, software custom development, APP custom development, WeChat official account development and other hardware and software design. It can also undertake the research and development of smart electronic products, household appliances scheme design, beauty equipment development, Internet of Things application development, smart home scheme design, TWS scheme development, Bluetooth audio development, children's toy scheme development, and electronic education product development.
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