摘要
为探明压电换能器开路电压随各影响因素的变化规律,从而为提高压电路面能量收集效果提供理论依据,采用压电陶瓷晶片PZT-5H及聚氨酯基板制备了夹层式压电换能器。通过室内振动加载试验,研究压电换能器开路电压在不同荷载水平、荷载频率、压电陶瓷晶片并联数量下的变化规律。在此基础上,制备了小尺寸压电路面结构模型,并通过移动加载试验分析面层类型和面层温度对埋置在结构内部的压电换能器开路电压的影响。结果表明:开路电压与荷载水平和荷载频率正相关,但开路电压增长速度随荷载水平和荷载频率的提高逐渐变缓,荷载水平直接影响压电陶瓷晶片应力大小,当施加荷载为5kN,加载频率为4Hz时,压电换能器开路电压稳定在9.44V;开路电压随压电换能器中压电陶瓷晶片并联个数增加而减小,压电陶瓷晶片个数增加,单个压电陶瓷晶片承受荷载变小,当并联个数由1个增加到3个时,开路电压下降了26.6%;不同类型的沥青混合料力学性能不同,AC-13面层下开路电压较AC-10和OGFC-13大,AC-13面层与压电换能器匹配效果较好;温度不仅影响沥青混合料的结构性能还影响压电陶瓷晶片工作性能,温度升高,沥青混合料结构性能变差,压电陶瓷晶片工作性能降低,开路电压降低。
In order to determine the variation rule of the open-circuit voltage of piezoelectric transducers with various influence factors,and to provide a theoretical basis for improving the effect of energy collection of piezoelectric pavement,sandwich piezoelectric transducers were fabricated by using PZT-5 Hpiezoelectric ceramic wafers and polyurethane boards.By means of laboratory vibration loading tests,the variation in the open-circuit voltage of piezoelectric transducers under different loads,load frequencies,and parallel number of piezoelectric ceramic wafers were studied.On this basis,small-size piezoelectric pavement structure models were prepared,and the influence of surface type and surface temperature on the open-circuit voltage of the piezoelectric transducer embedded in the structure was analyzed by the moving loading test.The results show that the open-circuit voltage is positively correlated with the load and loadfrequency,but the growth rate of the open-circuit voltage gradually decreases with an increase in the load and load frequency.The load directly affects the stress of the piezoelectric ceramic wafer.When the applied load is 5 kN and the loading frequency is 4 Hz,the open-circuit voltage of piezoelectric transducer is stable at 9.44 V.The open-circuit voltage decreases with an increase in the number of parallel piezoelectric ceramic wafers in the piezoelectric transducer.The number of piezoelectric ceramic wafers increases,and the load of a single piezoelectric ceramic wafer decreases.When the number increases from 1 to 3,the open-circuit voltage drops by 26.6%.Different types of asphalt mixtures have different mechanical properties.The open-circuit voltage under the AC-13 surface layer is higher than that under the AC-10 and OGFC-13 surface layer,and the matching effect between the AC-13 surface layer and the piezoelectric transducer is better.Temperature affects not only the structure performance of the asphalt mixture but also the performance of the piezoelectric ceramic wafer. With an increase in temperature,the structural performance of the asphalt mixture worsens,the working performance of the piezoelectric ceramic wafer decreases,and the open-circuit voltage decreases.2 tabs,9 figs,22 refs.
作者
曹阳森
沙爱民
蔡若楠
刘状壮
CAO Yang-sen;SHA Ai-min;CAI Ruo-nan;LIU Zhuang-zhuang(School of Highway,Chang'an University,Xi'an 710064,Shaanxi,China;Key Laboratory for SpecialArea Highway Engineering of Ministry of Education,Chang'an University,Xi'an 710064,Shaanxi,China)
出处
《长安大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2019年第1期53-60,80,共9页
Journal of Chang’an University(Natural Science Edition)
基金
国家重点研发计划项目(2018YFB16006300)
关键词
道路工程
压电换能器
荷载试验
开路电压
road engineering
piezoelectric transducer
loading test
open-circuit voltage
