Keywords for the future city of 2050: digital life. This is a lifestyle based on the Internet and a series of digital technology applications, which can provide people with a better life experience and work convenience.
In the nautical era of Columbus, the world suddenly became very big; after the advent of computers and the Internet, the world began to shrink again. With the increasing popularity of Internet technology applications, the human lifestyle has begun to change. Earth people seem to become "wisdom" overnight, and even items have "thoughts."
Not only that, in the future of rapid development of technology in 2050, no matter which kind of equipment is used, data can be transmitted by wireless means at any time and anywhere. The popularity of LED optical wireless networks promotes the development of the "Internet of Things", and the whole world is easily connected...
Today, people are used to wireless Internet access. Without the restraint of the network cable, we can enjoy the fun of surfing the Internet. However, because the object is blocked like a wall, some places in the room will inevitably receive no signal, or the signal is extremely weak. So, scientists imagine, why not let the lights emit signals? As long as the light is on, you will not be online.
This seemingly empty idea is now a reality. In the China Aviation Museum of the Shanghai World Expo, scientists from the Institute of Semiconductors of the Chinese Academy of Sciences presented the latest and most avant-garde results: LED optical wireless network...
According to the optical cable network principle light as a medium "flashing" signal
The LED light is switched on and off at a very fast frequency, and the light is pulsed when it is flashing to achieve signal transmission. This high-frequency flicker is undetectable by the human eye, so the LED light can be illuminated and signaled.
On the LED optical wireless network display platform of the aviation museum, a beam of light straight into a laptop, the staff freely surfing the Internet under the light. This is the LED optical wireless network - the transmission of light from LED lights as a network signal transmission tool.
The principle is that the LED lamp does not stop switching at a very fast frequency, and the light emits a pulse when the light is blinking, thereby realizing signal transmission. This high-frequency flicker is undetectable by the human eye, so the LED light can be illuminated and signaled.
Since the late 1970s, researchers have studied indoor optical communications. Engineers at the IBM Zurich laboratory built their first working system at the time. In everyday life, examples of transmitting data by light are also found everywhere. For example, the infrared transmission function on mobile phones in earlier years.
Nowadays, when energy-saving LEDs become the trend of future lighting, scientists naturally choose it as a tool for transmitting signals. Moreover, the LED light is visible light, which is more convenient for people to "press the cable".
According to the optical cable network performance mirror reflection can also access the Internet
When the diffuse light brightens the entire room, the network signal fills the room. Even more amazing is that the light reflected through the mirror also has the same signal!
The coverage of traditional wireless networks is highly dependent on the capabilities of wireless routers. When used, a wireless router transmits a radio frequency signal, that is, a radio wave having a certain transmission frequency. Although this type of radio wave has not been proven to be harmful to the human body, it is not environmentally friendly after all. In contrast, the biggest advantage of optical transmission signals is that there is no electromagnetic wave.
The signal strength of an optical wireless network lies in the light intensity, on the one hand, and the sensitivity of the receiving detector. At the current level of research in China, it is possible to achieve diffuse reflection reception—when the diffuse light brightens the entire room, the network signal then fills the room. Even more amazing is that the light reflected through the mirror also has the same signal!
LED optical wireless network does not have any requirements for network operators and computer equipment, as long as it is an ordinary external network. LED lights currently on the market are only illuminated. If you want to use it for communication, you must install a small "instrument" on the LED to enable high-frequency flicker.
In the past, a region had to achieve full coverage of wireless signals, and only a large number of wireless routers could be placed. Nowadays, scientists can directly carry communication signals in the place where the community wires are connected. At that time, whether it is the street lights of the community or the lighting of each house, the Internet signal can be sent.
According to the optical cable, the advantage is faster than the fiber.
The optical wireless network is just for the "last few meters" problem, that is, how to transfer the broadband data stream from the information backbone terminal to the indoor wireless device, the advantages are self-evident.
LEDs transmit faster and the signal is more stable. The difference in LED materials can result in different modulation capabilities and maximum bandwidth. At present, internationally, LED optical wireless networks can theoretically reach a rate of 500 Mbps.
The communication company also has a "last mile" argument, referring to the dilemma of accessing broadband services from the nation's high-speed data communication backbone to end users: although this is only the last small segment of the entire communication path, The high cost is staggering. The fiber broadband into the cell is now 100M. In fact, fiber-optic communication is still light, but it is transmitted in a special fiber, and the external interference is small, so the speed is fast. However, different cells need to build different fiber networks, which usually takes a very long time.
Similarly, the optical wireless network is just for the "last few meters" problem, that is, how to transfer the broadband data stream from the information backbone terminal to the indoor wireless device, the advantages are self-evident.
Such optical wireless networks are particularly well-suited for use in hospitals and factories because traditional radio frequency transmissions can interfere with navigation devices, medical devices or control systems in these areas.
In addition, the LED optical wireless network allows people to use broadband at will on the aircraft. The aircraft is connected to the ground in real time via satellite and is thus connected to the Internet. When the LED light "lights" the network signal to each passenger, there is no electromagnetic wave interference, and the aircraft navigation is completely unaffected.
In the future, the application of this technology allows the car to communicate with the front and rear lights. But it's just a voice communication, and you have to rely on street lights to get online.
"LED Optical Wireless Network" 2050 Feasibility Report
Optical wireless networks are commercially valuable and easy to use, but they are also difficult to implement because they choose the most complex channel, the atmosphere, to transmit data. The sky full of unpredictable weather will definitely bring a lot of variables to wireless optical communication, but indoor use is certainly no problem.
A series of features of optical wireless communication: fast transmission speed, low cost compared with paving fiber, fast construction speed, no need for radio frequency permission, no municipal permission to excavate pipes, portability, easy maintenance, no surrounding environment influences.
However, optical wireless communication is limited by the amount of transmitted energy, and it is impossible to transmit too far, and reliability is also affected by many external factors. For example, an enemy creates a fire on the link of an optical wireless network, destroying information integrity with artificial smoke.
However, the above drawbacks obviously do not hinder the development of optical wireless networks. When LEDs become the inevitable trend in the future, LED optical wireless networks have become inevitable.
"Internet of Things" 2050 Feasibility Report
The Internet of things is defined as the connection of any item to the Internet through a protocol, such as radio frequency identification (RFID), infrared sensors, global positioning systems, laser scanners, etc. Information exchange and communication to enable intelligent identification, location, tracking, monitoring and management of a network.
The Internet of Things has a very broad prospect that will dramatically change our current lifestyle. It can be said that the Internet of Things portrays a world full of intelligence. Specifically, the sensor is embedded and equipped into various objects such as power grids, railways, bridges, tunnels, highways, buildings, water supply systems, dams, oil and gas pipelines, and then the "Internet of Things" is integrated with the existing Internet. To achieve the integration of human society and physical systems. On this basis, human beings can manage production and life in a more sophisticated and dynamic way to achieve a "smart" state. (Reporter Xu Yuling)
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The connection of things makes the world full of wisdom
A cup of milk is in front of you, the eyes see the cup, the nose smells the milk, the mouth tastes the sweetness, the hand touches the temperature... The sensory perception is combined and the person gets this Judging a cup of milk. If the milk's sensory information is transmitted to the Internet, people can know about the milk situation through the network at any time. This is the "Internet of Things."
If we say that the Internet technology represented by the Internet can now connect people, people and things, weaving a two-dimensional network. In the future world, the network will present a three-dimensional structure--a way of experiencing the full interconnection of things and objects, and each item is given a future life of wisdom. At the World Expo in Shanghai, the application of Internet of Things technology is everywhere.
The refrigerator helps you buy cola
When the amount of food in the refrigerator is insufficient, it will automatically give you a reminder and inform the supermarket of the product information; when a bottle of red wine is placed in the refrigerator, it will automatically display the origin, year and other information of the bottle of wine... It is the picture of the future life built by us for the “Internet of Things Refrigeratorâ€.
In the Shandong Pavilion of the World Expo, there is such an "Internet of Things Refrigerator" that will "speak" and "shop". When you take out the remaining bottle of Coca-Cola from the "Internet of Things Refrigerator", the "refrigerator" will "open" to remind the owner that it is necessary to fill the new cola in time. What is even more unimaginable is that the “Internet of Things Refrigerator†display has information on the sales of new colas from supermarkets, as well as information on the origin, production time, shelf life and nutritional content of the new cola. After clicking on the product you want to buy on the screen, the shopping information will be transmitted to the supermarket set in advance by the Internet to complete the online shopping.
It is understood that this super-smart refrigerator can also provide healthy and green recipes and life plans for the people according to the frequency and habits of people's daily access to food. In addition, users can also use the refrigerator to realize videophone communication, browse online information, watch videos and many other life and entertainment functions. "Internet of Things Refrigerator" is an intelligent home appliance. It is like a home appliance that has been given life. It allows us to fully appreciate the magic of future life.
Washing machine automatically peaks with electricity
A washing machine that can save electricity costs appeared at the Shanghai World Expo together with the National Grid Pavilion. The washing machine is connected to the home grid and actively misses the peak period of power consumption. In this process, the user does not need to intervene. The biggest advantage of this product is to save users time and energy and reduce expenses.
In addition, the washing machine can "listen" to the "command" of the mobile phone. Send a “washing machine on†message to the washing machine through any mobile phone, then you can turn on the power and wash your clothes according to the set program. Sending "Washing Machine Off" will stop the washing machine.
According to reports, the application reflects the prospect of the Internet of Things - the built-in wireless signal receiving module (network card) of the washing machine, and the same "existence" in the Internet of Things connected to the mobile phone, easy to achieve smart home life. It is understood that the cost of adding the network card only adds tens of dollars.
Upon receiving the package, please open the lid to find the power cord and measuring cup.
• Featuring a large 300 ml water tank, the Essential Oil Diffuser can work continuously for 8 hours straight and provide a whole night of cool misting.
• One convenient button sets the oil diffuser timer to 1 hour, 3 hours, 6 hours, or continuous on.
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Specifications:
Product Dimensions: 6.5*6.5*5.7in
Product Net Weight: 14.8oz
Advanced Ultrasonic Technology: 2.4MHZ
Water Tank Volume: 300ml/ 10oz
Waterless Shut-Off Protection
Circle/Fix Light Color
Package Included:
1 x Essential Oil Diffuser(TT-AD002)
1 x Power Adapter
1 x Measuring Cup
1 x User Manual
Note:
1. Please chose the Water-Soluble Essential Oils for better experience.
2. To much water may lead to little mist. Please do not add water over MAX line.
3. This is an essential oil diffuser, but you also can use it as a Humidifier if you like.
Nebulizing Essential Oil Diffuser
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