查询词典 piezoelectric

The basic principle, measurement characterization, application status and problems are illustrated specifically in this paper, the advantages/disadvantages of these techniques are analyzed for piezoelectric applications, and the results show that combining the high resolution of the interferometer and the surface scanning ability of laser scanning vibrometer may lead to a convenient, accurate and reliable method for assessing piezoelectric coefficient.

详细分析了这些方法的基本原理、测试表征、应用状况和存在的问题，比较了这些方法的优缺点。

Considering thermopiezoelectric continua and nonlinear piezoelectric materials, the structural dynamics characteristics of composite piezoelectric smart structures is studied in this paper.

本论文考虑到力—热—电的多种耦合，以及压电材料的非线性进行了复合材料压电自适应结构的动力学方面的研究工作。

In the light of hysteresis, creep and nonlinearity of piezoelectric actuators, two control methods are presented. One is PID feedback control with BP neural network modeling in feedforward loop. Another is Fuzzy-PI sectionalized multimodal control. They are used for highspeed and precise position control of models driven by piezoelectric actuators.

针对压电陶瓷存在迟滞、蠕变和位移非线性等不足，提出了两种压电陶瓷微位移驱动器的位置闭环控制方法：带有BP神经网络前馈模型的PID控制方法和Fuzzy—PI多模态分段控制方法，实现了压电陶瓷微位移驱动器快速、高精度的位置控制。

The damping property of piezoelectric IIR filled with PZT piezoelectric ceramic powder and acetylene black was investigated.

探讨填充锆钛酸铅压电陶瓷粉和乙炔炭黑的压电IIR阻尼性能。

The mechanical properties and the electrical properties of the cantilever, such as spring constant, resonant frequency, mechanical quality factor, piezoelectric output and the noise level, determine the resolution of a AFM when piezoelectric cantilever is used as the force sensor.

在作为原子力显微镜的力传感器使用时，压电探针的机械特性，如弹性常数、谐振频率、谐振质量因子，以及电子特性如压电输出、噪声水平等决定了原子力显微镜的分辨率，而对于带有针尖和三角形前端的PZT压电探针，这些特性迄今未得到系统研究。

Mode convert;piezoelectric drill;ellipticall motion;converse piezoelectric effect

模态转换；压电钻；椭圆运动；逆压电效应

Their piezoelectric responses are investigated by means of decay measurement of isothermal piezoelectric coefficient and charge density.

借助准静态压电系数测量，研究了制备工艺对复合膜压电活性的影响。

The results show that with the increase of hot-pressing temperature, the interior density of composites increases and the pore ratio decreases, and piezoelectric composites hot-pressed at 180～190℃ have the compactest structure and best dielectric and piezoelectric properties.

结果表明，随着热压温度的升高，复合材料内部致密度提高，气孔率降低；当热压温度为180～190℃时，压电复合材料缺陷最少，排列最密实，其介电和压电性也最好。

The piezoelectric diaphragm, or bender plate, comprises a piezoelectric ceramic plate, with electrodes on both sides, attached to a metal plate made of brass, stainless steel, or a similar material with conductive adhesive.

压电模片或弯曲板组成压电陶瓷片，带双面电极，用可传导粘合剂贴在黄铜、不锈钢或类似材料制成的金属板上。

The results show that:(1)the low-noise source-follower circuit can be effectively used to measure the output of PVDF thin film;(2)the piezoelectric coefficient D33 of the PVDF is very sensitive on temperatures;(3)the value of D33 intensively fluctuate in initial loading stage,this means that a pre-load is needed in practice application to keep a constant piezoelectric coefficient D33 of the PVDF;(4)when the compressive load is imposed on the surface of the PVDF along a incline direction,D33 value is obvious changed with changing incline angle,and(5)the frequency bandwidth of the PVDF thin film is very wide,it is more suitable to measure strike or impact loading at various loading conditions.

结果表明：(1)低噪声源跟随电路可有效测量PVDF 薄膜输出；(2)PVDF压电薄膜的压电系数D33对温度很敏感；(3)D33值在加载初始阶段波动很大，所以实际应用中应给PVDF提供一个预压载荷，以确保有一恒定的压电系数D33；(4)当压载荷沿倾斜方向作用在PVDF 表面时，由于有剪切力作用，D33 值会随着倾斜角的变化发生显著改变；(5)PVDF 薄膜具有很宽的频响，更适用于测定不同载荷条件下的侵彻或冲击等动态载荷。

"Yes, now you can give yourself airs," she said, you have got what you wanted.

"对了，您现在高兴了，"她说道，这是您所期待的。

Then the LORD said to me: Rebel Israel is inwardly more just than traitorous Judah.

上主于是对我说：＂失节的以色列比失信的犹大，更显得正义。