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MIT researchers created a sensor that harvests energy from its environment.



"This energy management interface is the "brain" of a self-powered, battery-free sensor that can harvest the energy it needs to operate from the magnetic field generated in the open air around a wire. Credit: Courtesy of the researchers, edited by MIT News" (/news-media/self-powered-sensor-automatically-harvests-magnetic-energy)

There is nothing new about sensors that harvest energy from the sunlight. The thing that makes the new sensor fundamental is that it can also operate in complete darkness. This system makes it possible for employers to make sensor installations in narrow places, where is hard to pull wires. 

Because these kinds of sensors can operate in darkness, researchers can use the same technology to create the power sources for the miniature robots. That new technology makes those robots able to operate in areas. Where there is no sunlight. 

The new sensor is fully battery-free. It can harvest its energy from the environment. The difference between solar-panel systems is that this system uses vibrations and electromagnetic fields as energy sources.  And that means it's the ultimate tool for making sensors that observe things like diesel engines. 

Because this new sensor can operate in darkness,  it's easy to install. The same technology that is used in this tiny sensor can used in radio transmitter-recevers. 

That allows eavesdropping systems that are independent of the battery. Even if those energy harvesters can harvest only low voltages they can store energy into capacitors. And then that energy can used in remote-control systems. The ability to collect energy from the environment is an interesting thing. Nanorobots can use this technology as their energy source. 

In the same way, that kind of thing can used for nano-size microchips. In those systems, a wireless system transports data to the computing system wirelessly. The system uses the same radio waves as the power source. The problem with nanotechnical systems is that electricity jumps over their tiny switches. And that requires new ways to transport electricity and information to them. 


https://meche.mit.edu/news-media/self-powered-sensor-automatically-harvests-magnetic-energy


https://news.mit.edu/2024/self-powered-sensor-harvests-magnetic-energy-0118


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