集成式压电路面能量收集装置输出性能的实验

Experimental Study on Output Performance of Integrated Piezoelectric Pavement Energy Harvester

为了促进路面压电技术的实际应用,设计了一种具有保护措施的压电装置。进而设计了相应的实验系统,综合了车辙实验仪的路面碾压工况近似模拟和MTS实验机的高频激励双重优点。以储能电容的充电时间作为压电输出性能的衡量指标,对压电装置进行实验研究。结果表明:冲击荷载和冲击频率对压电装置输出效果的影响程度较为显著,在实际应用中应重点考虑;冲击荷载和环境温度参数对压电输出效果的影响具有正相关性,压电装置应优先铺设于重载车道和温度偏高的地区;随着冲击频率从低频到高频变化,压电输出效果先提高后降低,说明存在一个最优冲击频率,即为压电装置的固有频率,因此,压电装置在道路中的纵向铺设间距应考虑其固有频率与车速的匹配性。

In order to promote the practical application of pavement piezoelectric technology,a piezoelectric device with protective measures was designed.Then the corresponding experimental system was also developed.The experimental system combines the advantages of pavement rolling condition simulation of rutting tester and high frequency excitation of MTS(material testing system).Taking the charging time as the measurement index of the piezoelectric output performance,the experimental research on the piezoelectric device was carried out.The results show that:the impact load and frequency have significant influence on the output effect of piezoelectric devices,which should be pay more attention to in practical application;the impact load and environmental temperature have a positive correlation on the piezoelectric output effect,thus the piezoelectric device should be laid in the heavy load lane and the region with high temperature;with the changing of the impact frequency from low to high,the piezoelectric output effect first increases and then decreases.It indicates that there is an optimal impact frequency,that is,the inherent frequency of the piezoelectric device.Therefore,the matching between the natural frequency and the vehicle speed should be considered for the longitudinal spacing of piezoelectric devices in the road.