适用于无线传感器网络的应变能收集系统研究

为了使嵌入式无线传感器不再依赖电池供电,开发一个新型的利用应变能传感器系统。首先用单向排列的压电纤维与一块复合材料样品叠压。再将一个箔式应变计与压电纤维粘和并校准其分流值。该样品用一个电动装置驱动,频率分别为60 Hz、120 Hz和180 Hz,其在3处承受周期性弯曲负载(75到300με峰值)。验证应变能收集系统的可行性。

Research on Strain Energy Harvesting System for Wireless Sensor Networks

In order to make the embedded wireless sensor network not rely on batteries, a robust strain energy harvesting system is developed. First, a composite material specimen is laminated with unidirectional aligned piezoelectric fibers. Then a foil strain gauge is bonded to the piezoelectric fiber and shunt calibrated The specimen is loaded in three point cyclic bending （75 to 300 με peak） by using an electrodynamic actuator operating at 60,120, and 180 Hz. The feasibility of robust strain energy harvesting system is demonstrated.