道路用堆叠式压电俘能单元制备与应用性能  

Preparation and application performance of piezoelectric stack harvesting unit in road engineering

作　　者：李彦伟[1,2,3] 王朝辉[2] 石鑫[3] 陈森[2] 封栋杰 LI Yanwei;WANG Chaohui;SHI Xin;CHEN Sen;FENG Dongjie(Key Laboratory of Road and Traffic Engineering of Ministry of Education,Tongji University,Shanghai 201804, China;School of Highway,Chang’an University,Xi＇an 710064, China;Transportation Bureau of Shijiazhuang,Shijiazhuang 050051,China)

机构地区：[1]同济大学道路与交通工程教育部重点实验室,上海201804 [2]长安大学公路学院,西安710064 [3]石家庄市交通运输局,石家庄050051

出　　处：《振动与冲击》2018年第9期133-141,148,共10页Journal of Vibration and Shock

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：针对现有压电换能器用于道路工程存在技术缺陷,优选出适用于道路发电的堆叠式俘能单元结构并优化尺寸,制备8种路用堆叠式压电俘能单元,借助力学性能试验评估结构强度,开发出压电俘能单元测试夹具并搭建发电性能模拟测试系统,研究了压电俘能单元的发电性能,测试了发电路面小尺寸试件的能量输出效果。结果表明:制备的堆叠式压电俘能单元结构强度良好,能够满足发电路面施工及工作的使用要求;在试验研究范围内荷载大小、加载频率、压电陶瓷片厚度及堆叠层数均与压电俘能单元的发电性能正相关,单片厚度为1.0 mm的堆叠式压电俘能单元输出的最大开路电压可达37.8 V、最大功率可达183.2 m W;典型发电路面小尺寸试件能够实现11.06 m W的能量输出,具备了理想的应用前景。To eliminate technical defects of piezoelectric transducers used in road engineering,piezoelectric stack harvesting unit structures being applicable to road power generation were preferably selected and their sizes were optimized,8 piezoelectric stack harvesting units used in road engineering were prepared. Their structural strengths were evaluated by means of mechanical property tests. The test fixtures for piezoelectric harvesting units were developed,and the anlog test systems for electricity generating performance were constructed. The electricity generating performance of piezoelectric harvesting units was studied,the electrical energy output effect of power pavement’s small-size specimens were measured. The results showed that the structural strength of the piezoelectric stack harvesting units prepared is good to meet the requirements of power pavement’s construction and working; within the test range,magnitude of load,loading frequency,thickness of piezoelectric ceramic piece and layer number of stack are positively correlated to electricity generating performance of piezoelectric harvesting units; the maximum open circuit voltage and the maximum power of piezoelectric stack harvesting units with monolithic thickness of 1. 0 mm can reach 37. 8 V and 183. 2 m W,respectively;the energy output of the typical power pavement’s small specimen is 11. 06 m W,so it has an ideal application prospect.

关 键 词：发电路面 压电俘能单元 制备 应用性能 能量输出 

分 类 号：U414.1[交通运输工程—道路与铁道工程]