正压电效应

进行了一次正压电效应、二次逆压电效应的理论分析与实验验证。

The theory of the first direct piezoelectric effect and the secondary converse piezoelectric effect is analyzed and confirmed by experiments .

依据该原理利用一次逆压电效应完成驱动功能、二次正压电效应完成传感功能，设计了自感知执行器的方案及实现结构，并通过实验验证了该种方案的可行性。

The design proposal and realization structure of self-sensing actuators are proposed by using driving and sensing function which can be implemented through primary converse and secondary direct piezoelectric effect respectively . The validity of design proposal is verified experimentally .

结果表明，在裂纹尖端应力分量和电位移分量均具有&1/2的奇异性；在正压电效应下，应力强度因子k1与电学量无关。

The results show that the stress and the electric displacement components in the crack 's top have the & 1 / 2 singularity , and the stress-intensity factor k_I is independent of electric quantity when a positive piezoelectric effect is examined .

设计了电荷电压转换器的频响试验，试验曲线与理论曲线吻合良好。（2）基于正压电效应设计一种可用于RC结构地震压应力监测的压电智能骨料。

A frequency response test of charge-voltage converter is designed and the test curve is in good agreement with the theoretical one . ( 2 ) The piezoelectric smart aggregate for monitoring the RC structure seismic stress response is designed based on the piezoelectric effect .

还根据正逆压电效应，介绍了机械能自供电的原理，并设计出相应的机械结构。

According to piezoelectric effects , the principle and the structure of self-generating of mechanic energy are also introduced .

利用压电材料的正逆压电效应，建立了压电微位移作动器的设计模型。

A design model was developed for a piezoelectric micro-placement actuator based on the actuation effect of piezoelectric materials .

对压电智能层合板的变形控制进行了解析法研究，提出了符合压电材料正逆压电效应特性的压电层表面的电学边界条件。

The study of the deformation control for piezoelectric smart laminated plate by the analytical method and the find of the electrical boundary conditions of piezoelectric layer in line with the unique features of direct and inverse piezoelectric effect .

首先叙述了智能结构的构成，以及其组成材料的特性和本构理论，描述了压电材料的正，逆压电效应和压电方程。

First of all , the construction of smart structure and the characteristics and constitution mechanism of the component materials was described .

第二章.分析了压电陶瓷的力学和电学性能，阐述了它的正、逆压电效应，推导了压电陶瓷的压电方程。

In chapter two , the direct and inverse piezoelectric effect of piezoelectric ceramic are studied , and the piezoelectric equation of piezoelectric ceramic is deduced .

本文采用基于石英晶体正、逆压电效应的剪切力探针-样品间距控制方法，分别用石英音叉和压电陶瓷片作为剪切力探测器件，实现了纳米级的间距控制。

Based on piezoelectric effect , controlling the sample-tip distance within wavelength , by shear force detection using tuning fork and piezoelectric ceramics separately as the detector , was constructed .

压电陶瓷材料具有正、逆压电效应，而且还具有响应快、成本低等优点，它的出现为结构损伤检测和健康监测提供了新的传感手段。

Piezoelectric ceramic materials have many advantages , not only positive and inverse piezoelectric effect , but also fast response and low cost , and the emergence provides a new sensing method for structural damage detection and health monitoring .

本文具体工作如下：基于经典压电理论研究了压电晶体的纵向三次耦合效应，提出压电晶体三次正、逆压电效应的实验研究方法。

The specific work in this paper is as follows . Firstly , according to classical piezoelectric theory , tertiary coupling effect under longitudinal mode of piezoelectric crystal is investigated and the validation methods of tertiary piezoelectric effects are proposed .

利用氢气和空气之间在声学特征上的显著差异，以石英作为压电材料，并且采用双压电电极的工作方式，采用了正逆两种压电效应，检测出不同浓度氢气的谐振频率。

The hydrogen sensor based on ultrasonic resonator uses the significant characteristics differences between the hydrogen and air , selects quartz as the piezoelectric material , uses two inverse piezoelectric effects to detect the resonant frequency of different concentrations of hydrogen .