智能发电路面压电元件保护措施设计及能量输出  

Design of Piezoelectric Elements'Protection Measures and Energy Output of Intelligent Power Pavement

作　　者：王朝辉[1] 陈森[1] 李彦伟[1,2,3] 石鑫[2] 李强 

机构地区：[1]长安大学公路学院,陕西西安710064 [2]石家庄市交通运输局,河北石家庄050051 [3]同济大学道路与交通工程教育部重点实验室,上海201804 [4]俄克拉荷马州立大学土木与环境工程学院,俄克拉荷马静水ok74078

出　　处：《中国公路学报》2016年第5期41-49,共9页China Journal of Highway and Transport

基　　金：国家自然科学基金项目(51208045);中央高校基本科研业务费专项资金项目(310821162013)

摘　　要：针对压电换能器发电路面存在的技术缺陷,优选适用于道路发电的压电元件并进行结构改进处理,设计出4种保护措施方案,提出了综合性能评价指标并确定最优保护结构,测试评价了典型面层结构组合小尺寸试件电学输出效果,开发制作出能量采集实体电路并探究了其实际应用工作状态。结果表明:直径35mm、厚度0.4mm圆形压电陶瓷片可满足发电路面各项技术要求,结构改进处理方案可有效延长压电元件使用寿命;D型刚性铜片与橡胶垫组合保护结构为最佳保护措施类型;薄层罩面复合AC-13型发电路面电学输出效果最优,可稳定连续输出峰值电压14V、有效输出功率0.44mW的交流电信号;标准能量采集改进电路可高效完成对道路压电微能量的转换和采集功能。To solve the technical problems of power pavement based on piezoelectric transducers,piezoelectric elements that were applicable to generate electricity in the pavement were selected and several structural changes were implemented.Four kinds of protection measures were designed,and comprehensive performance evaluation indexes were put forward to determine optimal protection measure. Electrical output effect of small specimens with different combinations of typical layer structures was tested and evaluated,and energy harvesting circuit was developed and produced and its actual application effect was investigated.The results show that round piezoelectric ceramic element with diameter of 35 mm and thickness of 0.4 mm can meet the technical requirements of power pavement;structure improvement measures help to prolong service life of piezoelectric element obviously.Protection measure for structure combining D-type rigid copper with elastic rubber is the optimal measure.Electrical output effect of powerpavement consisting of thin overlay composite AC-13 grading is optimal,which can continuously export 14 Vpeak voltage and 0.44 mW real output power for alternating current signal steadily.Improved circuit by energy harvesting standard can complete conversion and acquisition of piezoelectric micro energy of the road efficiently.

关 键 词：道路工程 发电路面 压电性能试验 保护措施 压电元件 能量输出 

分 类 号：U414.1[交通运输工程—道路与铁道工程]