The new device generates electricity from any surrounding vibrations
Researchers have developed a new device for generating electricity from ambient vibrations at different frequencies with an automatic resonance tuning mechanism.
Various industrial objects, cars, pedestrians and much more constantly create small vibrations with a certain amount of energy. It can be collected using the phenomenon of resonance, but for this the frequency of the device itself must coincide with the oscillations of the source. However, due to the wide range of vibrations in the environment, their use is severely limited..
To solve this problem, self-adjusting assemblers with an integrated motor or microcontroller were previously developed, which consumed a significant part of the generated energy during operation..
Now scientists from the Korea Institute of Science and Technology have created a vibrational energy collector with a special structure that can automatically tune to the surrounding frequency without a separate electrical device. This function is performed by an internal reference weight, which moves autonomously, and when vibration is detected, the weight changes its position in accordance with its frequency. As a result, the device receives the same frequency as the external vibrations, reaching resonance.
This expands the working range of the developed energy collector by 1400% compared to existing devices with a single natural frequency..
Such devices can act as an autonomous power source for wireless sensor networks, wearable electronics and the Internet of things..
In addition to methods of collecting energy, scientists are improving the methods of its transmission. Wireless Power Lines Testing Started In New Zealand Recently.
text: Ilya Bauer, photo and video: KIST