piezoelectricity

This paper brings forward a newly tactile sensing technology applying piezoelectricity of quartz crystal.

针对这个问题,本文提出一种新型的基于压电原理的三轴力触觉传感技术.

The experimental and theoretical analysis of the ultrasonic field for the spiral coil electromagnetic acoustic transducer ( EMAT) and the piezoelectricity transducer array was researched in the thesis.

本论文主要研究螺旋线圈型电磁超声换能器和压电阵列超声换能器的声场分布和实验验证。

In order to select a proper piezoelectricity valve for the gas injecting system on Sino UNIted Spherical Tokamak ( SUNIST), we have tested the gas injecting rate and pulse response of NS valve ( made in China) and VEECO valve ( made in USA).

为了给中国联合球形托卡马克装置（SUNIST）的充气系统选择合适的压电阀，我们对国产NS型压电阀和美国的VEECO压电阀进行了送气率和脉冲送气特性的测试。

Furthermore, ZnO has properties of piezoelectricity and photoelectricity, so it can be applied as surface acoustic wave sensor, piezoelectric resistance and detection materials et al.

此外ZnO具有优异的压电和光电性能，可以被用作声表面波器件、压敏电阻和探测材料等。

Carbon fiber cement composite ( CFCC) showing its excellent piezoelectricity, the application of its piezoelectricity was studied.

鉴于短切碳纤维和碳纤维毡水泥基复合材料（CFCC）具有很好的压敏性，对CFCC的压敏性进行了应用研究。

Piezoelectricity of non-polar space charge electret, porous PTFE film with unidirectional mechanical stretch was studied.

研究了经单向机械拉伸形成的非极性空间电荷型薄膜驻极体聚四氟乙烯（PTFE）多孔膜的压电性。

In the view of serial temperature excursion of piezoelectricity gyro, we analysis the reason for temperature excursion, do the experiment, and propose the way of BP neural network to compensate the temperature excursion.

针对中低精度的压电陀螺静态零位输出随温度漂移严重的问题，分析了产生的原因，做了相应的实验，提出了用BP神经网络进行补偿的方法。

After analyzed piezoelectric of thickness vibration, the paper provided frequency equation of thickness vibration piezoelectricity.

对厚度振动的压电片进行理论分析，推导了厚度振动压电片的频率方程。

This paper mainly introduces the calibration method of piezoelectricity pressure sensors in the pressure field testing.

介绍压力场测试中所采用的压电压力传感器的标定方法.

The performance of driving source greatly affects the dynamic characteristics of the Piezoelectricity base excitation device.

驱动电源的性能在很大程度上决定了压电底座激励装置的动态特性.

This paper mentions the principle of seismic model experiment sensors. In this paper, two new types of piezoelectricity material ( PVDF and 3-3 connectivity pattern composite piezoelectric ceramic) are presented.

本文叙述了新型地震模型实验传感器的原理，介绍了两类新型压电材料（PVDF及3&3连结复合压电陶瓷），并由它们制备成两种新颖宽带、窄脉冲、无源及可逆式传感器。

The text is mainly about the damping mechanism of polymer base piezoelectricity intellectual damping materials.

摘要综述了聚合物基压电智能阻尼材料的阻尼机理.

By changing the stack position and quantity of the piezoelectricity chip of piezoelectric ceramic sandwich transducer we can make the washing transducer bear two obvious resonance peaks.

通过改变夹心式换能器压电晶片的堆放位置及组数，使超声清洗换能器具有两个明显的谐振峰。

The Coulomb force acting on the free line charge due to the piezoelectricity and the distributed boundary polarization charges was discussed at first.

首先分析的是因压电性和边界极化电荷所引起的作用在自由电荷上的Coulomb力。

Influences of pressure treatment and charging method on the piezoelectricity of cellular polypropylene film

压力膨化处理和充电方法对PP蜂窝膜压电性的影响

The research of the piezoelectricity will expand to bone transplant too.

对于骨力电性质研究的目的也扩展到骨移植领域。

Two methods to measuring the spin angle velocity of aerocraft are put forward, one is using the accelerator, the other one is using piezoelectricity gyro.

提出了两种测量航天飞行体自旋角速度的方法：一种是利用加速度表来测量航天飞行体自旋角速度，另一种是利用压电式陀螺仪来测量航天飞行体自旋角速度。

The piezoelectricity type acceleration instrument is one kind of commonly used accelerometer.

压电式加速度传感器是一种常用的加速度计.

The work may enrich the theory about the elastic waves in piezoelectricity medium, the contact state and interfacial forces could be evaluated by detecting the mechanical or electrical information carried by waves. It is of both theoretical and practical importance for evaluation and prediction of structural safety.

笔者进一步丰富了压电弹性波动理论，利用波所携带的力学或电学信息，可望无损探测界面的接触状态及接触力等参量，对结构的安全评估与寿命预测具有重要的理论价值与实际意义。

Augment Piezoelectricity Common Rail Injection System with Variable Injection Rate Shape

喷油率形状可变的增压式压电共轨喷射系统

Piezoelectricity of single-layer and multi-layer cellular polypropylene film electret

聚丙烯孔洞型铁电驻极体薄膜的压电性研究单层及多层PP蜂窝膜驻极体的压电性

Testing for buffer characteristics of the prototype of lunar lander with three legs are finished by means of piezoelectricity acceleration transducers and the DASP software which may collect and analyze data.

采用压电式加速度传感器及DASP数据采集与分析软件对三支撑月球着陆器原理样机缓冲性能进行了试验测试。

The design principle of larger power piezoelectricity transducer

大功率压电换能器的设计

Research on Key Technologies of Three-D Force Sensor Based on Piezoelectricity Crystal and Calibrating Device for Multi-D Force Sensor

压电式三维力传感器与多维力传感器标定装置关键技术研究

The Design of a New Type Three-dimension Power Transducer Based on Piezoelectricity

基于压电式新型三维力传感器的设计

Design and manufacture the back passage of the system, which make Single Chip Microcomputer send out faint controlling signal to control the on/ off of piezoelectricity valve through Solid State Relay.

对系统的后向通道进行设计与制作。使单片机输出的微弱的控制信号能够通过固态继电器控制压电阀的开启，以最终控制进入调节阀气室的进气正三日~与邑。

Finally, the impedance characteristic of piezoelectricity transducer and the principle of frequency tracking were studied. Software phase-locked loop was used to track self-adapting frequency, and arithmetic of frequency tracking based on change step and dichotomy was presented.

最后，对压电换能器的电抗特性和频率跟踪原理进行研究，采用软件锁相环进行了频率自适应跟踪设计，提出变步进与二分法相结合的频率跟踪算法。

Piezoelectricity crystal is used to detect the acoustic pulse signal caused by partial discharge within power capacitor and after being amplified by high gain, wide bandwidth preamplifier, these signals are sent to main body of instrument through coaxial cable.

该装置采用压电晶体检测电力电容器内局部放电所产生的声脉冲信号，经高增益、宽频带的前置放大器放大后，由高频同轴电缆传送至仪器本体。

As a kind of intelligent structure, composite piezoelectricity material has also been widely used in the astronautic engineering for the following advantages, easier controlling ability, high strength and great stiffness, better anti-fatigue ability.

压电复合材料是航空航天工程中的一种新型智能材料，具有良好的可控性能、强度高、刚度大和抗疲劳性能好等优点，在航天工程中得到了广泛的应用。

Being based on several methods of AVI this thesis designs a compound system using infrared and piezoelectricity sensor.

在分析了现阶段多种车型自动识别的基础上，设计了红外探测器+压电传感器的复合式车型识别系统。