Self-powered autonomous wireless sensor node using vibration energy harvesting
Self-powered autonomous wireless sensor node using vibration energy harvesting
复制标题
DOI：
10.1088/0957-0233/19/12/125202
复制
发表时间：
2008-12-01
影响因子：
2.4
通讯作者：
Beeby, S.
中科院分区：
文献类型：
--
作者：
Torah, R.;Glynne-Jones, P.;Beeby, S.
本文报道了一种由环境振动驱动的能量感知自主无线状态监测传感器系统（ACMS）的开发和实现。电磁（EM）发生器已被设计为收集足够的能量，以供电的射频（RF）链接的基于加速度计的传感器系统。ACMS是能量感知的，并且将根据可用能量来调整测量/发送占空比;在0.6 m s（rms）（-2）加速度下，这通常是每3 s，并且可以低至0.2 m s（rms）（-2），占空比约为12 min。EM发生器的体积仅为150 mm（3），在0.6 m s（rms）（-2）加速度下产生58 μ W的平均功率。2）频率为52 Hz的加速度。此外，一个电压倍增器电路示出，以增加电气阻尼相比，一个纯粹的电阻性负载，这使得120 μ W的平均功率将产生在1.7 m s（均方根）（-2）均方根加速度。ACMS已在工业空气压缩机和办公室空调机组上成功演示，连续监测振动水平，从而模拟典型的状态监测应用。
This paper reports the development and implementation of an energy aware autonomous wireless condition monitoring sensor system ( ACMS) powered by ambient vibrations. An electromagnetic ( EM) generator has been designed to harvest sufficient energy to power a radio-frequency (RF) linked accelerometer-based sensor system. The ACMS is energy aware and will adjust the measurement/transmit duty cycle according to the available energy; this is typically every 3 s at 0.6 m s(rms)(-2) acceleration and can be as low as 0.2 m s(rms)(-2) with a duty cycle around 12 min. The EM generator has a volume of only 150 mm(3) producing an average power of 58 mu W at 0.6m s(rms)(-2) acceleration at a frequency of 52 Hz. In addition, a voltage multiplier circuit is shown to increase the electrical damping compared to a purely resistive load; this allows for an average power of 120 mu W to be generated at 1.7 m s(rms)(-2) rms acceleration. The ACMS has been successfully demonstrated on an industrial air compressor and an office air conditioning unit, continuously monitoring vibration levels and thereby simulating a typical condition monitoring application.