摘要
基于高度非线性孤立波的基本原理,设计了3个相同的采用PZT压电薄片作为压力传感器的换能器,并将换能器应用到无损检测中,测量了铁氟龙、花岗岩和不锈钢3种材料样本的杨氏模量值。测量结果显示非线性孤立波的特性与被测材料的弹性性质紧密相关。在对样本的100次测量结果中,3个换能器之间的偏差率仅为0.5%,单个换能器的测量结果的标准偏差与均值比低于0.4%,表明不同换能器之间的一致性、单个换能器的可重复性高。换能器测量得到的样本杨氏模量值与理论参数间的偏差率均低于3%,验证了换能器测量结果的可靠性。通过对比超声脉冲速度检测方法,进一步验证了换能器的经济适用性和测量结果的可靠性。
Based on the fundamental theory of highly nonlinear solitary waves （HNSWs）, three transducers embedded with PZT circular materials are investigated, and designed for the nondestructive testing （NDT） of the Young＇ s Modulus of materials. Three different materials, including Teflon, granite and stainless steel, are tested by the transducers. The testing results show that the differences among transducers are below 0.5% , and the ratio between standard deviation and average value for single transducer is below 0.4% , which proves the high consistency and repeatability of the three transducers. The deviations from the theoretical analysis and the three materials are below 3% , which confirms the accuracy and reliability of the transducers. By comparing the results of Ultrasonic Pulse Velocity method, the HNSWs based transducers are more affordable, accurate and reliable.
出处
《仪器仪表学报》
EI
CAS
CSCD
北大核心
2017年第11期2762-2768,共7页
Chinese Journal of Scientific Instrument
关键词
高度非线性孤立波
换能器
无损检测
杨氏模量
highly nonlinear solitary waves （HNSWs）
transducer
nondestructive testing （NDT）
Young＇ s modulus
