全方向振动能收集转电能装置设计

All-Direction Energy Harvester-Converter from Vibration to Electrical Energy

传感器等微小设备使用功率越来小,人类行走,车辆运行,机械运转,海水波涛起伏等等现象都存在振动,使得振动能量转换为电能可以作为微小设备传感器的能量源,是当前振动能利用的研究热点之一,针对无线监测中电池寿命限制整个系统使用寿命问题,研究一种振动能量供电系统,将振动能量转为电能,利用质量球作为全方向收集振动能的动力源,联接机械系统以自行收集微小振动能,在达到定值时自动释放能量,转换成电能,并以高于汲取的功率释放,使得由机械能转换的电能电压可以直接为电子设备使用。对不便更换电池的监测系统中电能的补充,延长监测系统中电池使用寿命具有重要意义。

Vibrations are intrinsically associated with many daily activities/phenomena such as human/animal walking,motion of vehicles,machinery operations,tidal motion of sea water,etc. Miniaturization of vibration sensors as well as other equipment parts makes it a hot current research topic to make use of vibration energy,including energy absorption,storage,and energy conversion. The finite battery life in wireless monitoring limits the service timespan of the whole system,hence there is an emerging need to develop a power supply system for turning the vibration energy into electrical energy. we propose to use a suspension ball-mechanical device/system as a medium for collecting small vibration energy from all directions. After being collected up to a threshold,the vibration energy is automatically converted to electrical energyat a much higher output power than the harvesting power. This energy harvesting-converting system may find possible applications in charging electronic devices when it is inconvenient or even impossible to replace the battery.