Modern homes are filled with all kinds of wires and sockets, which not only hinders the view, but also creates certain security risks. A report on the "cordless bulb" on the 8th of the British "Daily Mail" made people see the hope of getting rid of these troubles.
Cordless bulbs were developed by researchers at the Massachusetts Institute of Technology. The scientific community expects to extend this technology to other fields, and ultimately realize wireless automatic charging of mobile phones, notebook computers and other devices.
The idea of ​​wireless transmission has been proposed for a long time, but it is considered by many scientists to be impossible. Because the electromagnetic energy emitted by the transmitter is distributed around, and humans cannot control the electromagnetic energy centrally, it is even less useful.
But last fall, MIT physics professor Marin Sorjahic proposed a new theory that could use electromagnetic energy through "radio energy transmission" technology. According to Soljacic's theory, as long as the electromagnetic energy transmitter and the receiving device resonate at the same frequency, energy exchange between them can be performed.
"It's like the sound of a theater can shatter a glass," said Soljasik. "The condition is that the sound waves of both the song and the glass are to resonate."
Based on this theory, the team led by Soljasik conducted experiments. They use two copper wire coils to act as resonators. One coil is connected to the power supply as a transmitter; the other is connected to the desk lamp and acts as a receiver. As a result, they successfully lit a 60-watt electric light that was 2.13 meters away from the transmitter.
Most importantly, trials have shown that "radio energy transmission" technology is harmless to humans. Because electromagnetic fields only affect objects that can resonate with them, items such as humans, tables, blankets, etc., almost do not respond to electromagnetic fields. For the success of the "Radio Energy Transmission" technology, the Daily Mail commented, "This may announce the end of the socket is coming."
“As long as the laptop is equipped with a radio transmitter, people can no longer need to connect the computer to the outlet to charge, because it will automatically charge,†said Professor Peter Fisher, one of the research team members.
In an interview with reporters, Soljacik also said that modern people live in a world full of wires and sockets, and the wireless transmission technology of electric energy will make it possible for humans to get rid of the troubles caused by wires and batteries. Therefore, this is a promising new technology.
Next, what the research team is doing is trying to increase the transmitter power and the receiver's receiving efficiency. At that time, mobile phones and laptops can be automatically charged in a room equipped with a transmitter, even without a battery, or directly connected to a power source through a socket. Perhaps it can be as predicted by the Daily Mail that in the future, humans can really say "goodbye" to sockets and wires.
Despite the emergence of "radio energy transmission" technology, people have seen the hope of getting rid of electric wires and charging troubles. However, the research team acknowledges that the "radio energy transmission" technology needs to be improved before it can enter the homes of ordinary people.
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