Infrasonic power-harvesting and nanowatt self-powered sensors
Infrasonic power-harvesting and nanowatt self-powered sensors
复制标题
次声波能量收集和纳瓦自供电传感器
DOI：
10.1109/iscas.2009.5117709
复制
发表时间：
2009
期刊：
影响因子：
--
通讯作者：
N. Lajnef
中科院分区：
文献类型：
--
作者：
S. Chakrabartty;N. Lajnef
结构工程中许多感兴趣的信号，例如地震活动，都在次声范围内（频率小于20赫兹）。这对开发无电池传感器提出了重大挑战，这些传感器不仅需要监测罕见的次声事件，还需要从被监测的信号中收集用于传感、计算和存储的能量。在本文中，我们证明了我们先前报道的压电浮栅传感器的线性注入响应是次声信号自供电传感和计算的理想选择。实验结果表明，采用0.5 μ m CMOS技术制作的传感器可以计算和记录输入地震事件的水平交叉统计。收集的数据与使用标准数据采集系统获得的结果一致。此外，该传感器的电流消耗小于100nA，这使得其基于次声能量收集的工作成为可能。
Many signals of interest in structural engineering, for example seismic activity, lie in the infrasonic range (frequency less than 20 Hz). This poses a significant challenge for developing batteryless sensors that are required not only to monitor rare infrasonic events but also to harvest the energy for sensing, computation and storage from the signal being monitored. In this paper, we show that a linear injection response of our previously reported piezo-floating-gate sensor is ideal for self-powered sensing and computation of infrasonic signals. Our experimental results demonstrate that the sensor fabricated in a 0.5µm CMOS technology can compute and record level crossing statistics of an input seismic event. Collected data are in good agreement with results obtained using a standard data acquisition system. Also, the sensor consumes less than 100nA of current, which makes its operation based on infrasonic power-harvesting feasible.