According to Xinhua News Agency, our scientists recently reported that it is possible to design a kind of energy harvester that can supply wearable electronic devices, such as sports bracelets, so as to make the wearable electronic devices free of charge.
'With the rapid development of wearable electronic devices, more and more research is devoted to collecting the energy of human motion so as to prolong the battery running time.' 'Dr. Wu Zhihun, one of the study leaders, said that the principle method for collecting body motion energy Including the principle of electromagnetic induction, piezoelectric effect and triboelectric effect. Among them, it is common to collect energy by using suspended permanent magnet for translational motion. However, the collector is usually limited to a specific running direction. If the angle is inclined, the collector The power output will be limited.
To solve this problem, the team designed a new bracelet-shaped energy harvester that can be used to convert any direction of motion into a rotational movement of a moving magnet by using two magnets that are circular and repel each other Collection of mechanical energy in the direction of any body movement to maximize the acquisition of exercise energy.
Bracelet-shaped energy collector symmetrical design, the initial position of the moving magnet no special requirements.
Experimental results show that the energy-harvesting 'bracelet' stores 0.15 millijoules of energy and delivers an average effective power of 1.17 milliwatts or more in as little as 0.13 seconds during any single movement. Energy can extend the battery life of wearable devices, enough to maintain the normal use of low-power electronic devices such as sports wristbands without charging.
Relevant research results recently published in the international academic journal "Applied Physics Communication".
