基于无源自供能电路的微型风能采集

Micro wind energy harvesting based on passive self-powered circuit

针对工业外场环境下,传统电池供能方式存在污染环境及不易更换的问题,通过压电陶瓷将微型风能转换成电能后,直接为无线传感节点等微型电子设备供电,可以缓解这一问题。针对经典电路回收微型风能功率较低的问题,提出了一种无源自供能接口电路,可以更高效地采集微型风能。对电路进行了理论分析和Multisim软件仿真,仿真结果表明:设计的电路回收微型风能是经典电路的4倍左右。

Aiming at the problems that in industrial field environment,battery powered mode causes environmental pollution and it is difficult to replace the batteries,micro wind energy is transfered into electric energy by piezoelectric ceramics,and then directly power the micro electronic equipment such as wireless sensor nodes,which can alleviate the above problems.Aiming at the low power of classic circuit harvesting miniature wind power,a passive self-powered interface circuit is proposed,to harvest micro wind energy high efficiently.The proposed circuit is theoretically analyzed and simulated by Multisim software.The results show that the harvested energy with proposed circuit is about 4 times as of the harvested energy with classic circuit.