Investigation on Multi-Piezoelectric Effects from the First Positive Piezoelectric Effect

2014 ◽  
Vol 609-610 ◽  
pp. 1398-1403 ◽  
Author(s):  
Li Ping Shi ◽  
Jie Huang ◽  
Xi Wen Wei ◽  
Yan Bo Wei
Keyword(s):  
Experimental Data ◽  
Boundary Conditions ◽  
Experimental Research ◽  
External Force ◽  
Piezoelectric Effect ◽  
Piezoelectric Ceramics ◽  
Applied Force ◽  
Piezoelectric Effects ◽  
Effect Theory ◽  
Converse Piezoelectric Effect

Based on the traditional piezoelectric effect theory, the process of multi-piezoelectric effects generation is analyzed and the theory of the secondary and tertiary piezoelectric effect is deduced by four kinds of piezoelectric equations. Experimental research is performed through the PZT-5 piezoelectric ceramics stack, the existence of multi-piezoelectric effects is verified and experimental data is obtained under certain boundary conditions. The experimental data results show that if an external force which is applied to the positive piezoelectric effect is 400, the displacement generated by the secondary converse piezoelectric effect is 0.16. Therefore, starting from the first positive piezoelectric effect of the piezoelectric ceramics under applied force, the displacement generated by the secondary converse piezoelectric effect and the voltage generated by the tertiary positive piezoelectric effect are all linear with the applied force.

An investigation of the tertiary coupling effect under the longitudinal mode of a piezoelectric crystal

2009 ◽  
Vol 223 (8) ◽  
pp. 1777-1785 ◽  
Author(s):  
Z H Zhang ◽  
B Y Sun ◽  
M Qian ◽  
J Zhang ◽  
Y H Shi ◽  
...  
Keyword(s):  
Theoretical Analysis ◽  
Boundary Conditions ◽  
Piezoelectric Effect ◽  
Coupling Effect ◽  
Longitudinal Mode ◽  
Experimental Results ◽  
Sensors And Actuators ◽  
Piezoelectric Effects ◽  
Converse Piezoelectric Effect ◽  
The Relationship

In this article, multiple piezoelectric effects are investigated on the basis of the classical piezoelectric theory. The objective reality of multiple piezoelectric effects is elucidated from theoretical analysis first. Based on four kinds of piezoelectric equations, the relationship between the generation of multiple piezoelectric effects and boundary conditions is analysed, the process of their generation is elaborated, and the formulae of the tertiary piezoelectric effect are deduced. Then, the experimental results of the tertiary coupling effect are obtained under the longitudinal mode of a PZT-5 stack by the methods that are equivalent to changing boundary conditions. Experimental data show that the output of the tertiary direct and converse piezoelectric effect is also linear with the applied force and voltage, respectively. However, the output directions are opposite to that of the primary piezoelectric effect. The theoretical analysis is justified by experimental results and the experimental methods presented are proved to be scientific and feasible. Moreover, the influence of the tertiary piezoelectric effect on the piezoelectric coefficient and the performance of sensors and actuators is further analysed. The study of multiple piezoelectric effects provides a new method for the improvement of the performance of piezoelectric sensors and actuators.

Applied Research on Self-Sensing Micro-Flow Injection Device Based on Piezoelectric Ceramics

2015 ◽  
Vol 645-646 ◽  
pp. 746-755 ◽  
Author(s):  
Jie Huang ◽  
Li Ping Shi ◽  
Hai Min Zhou ◽  
Xi Wen Wei ◽  
Yan Bo Wei
Keyword(s):  
Flow Injection ◽  
Applied Research ◽  
Piezoelectric Effect ◽  
Piezoelectric Ceramics ◽  
Injection Device ◽  
Inverse Piezoelectric Effect ◽  
Injection Process ◽  
Direct Piezoelectric Effect ◽  
Piezoelectric Effects ◽  
Micro Flow

Experimental research of first inverse, secondary positive piezoelectric effects are performed through the PZT-5 piezoelectric ceramics. Introduce a concept of self-sensing micro-flow injection device based on piezoelectric ceramics. Utilized the characteristic of the first inverse piezoelectric effect which can generate micro-displacement, micro-position and then micro-injection can be realized by the micro-change of piezoelectric ceramic’s volume. Self-sensing displacement in micro-injection process can be obtained by utilizing the secondary direct piezoelectric effect. The experimental data: if the external voltages which were applied to the stack are 20V and 40V, the theoretical displacement generated by the first inverse piezoelectric effect are 4μm and 8μm respectively, the actual measured values are 3.57μm and 8.12μm respectively, self-sensing displacement of secondary direct piezoelectric effect are 1.48μm and 2.53μm respectively. It proves that the theoretical and experimental device could sense the displacement of micro-injection and the integration of sensor and actuator can be achieved.

EXPERIMENTAL STUDY OF THE KINEMATIC PARAMETERS OF MOVEMENT OF CARS FORCED IDLE MOTION

2018 ◽  
pp. 52-57
Author(s):  
Ivelin Kostov
Keyword(s):  
Experimental Data ◽  
Experimental Study ◽  
Experimental Research ◽  
Kinematic Parameters ◽  
Research Results ◽  
Software Product

In the work brought some experimental data of kinematic parameters of movement of cars forced idle, as the software product was used to diagnose 900 ATS, which recorded kinematic parameters of vehicle. On the basis of the conducted experimental research results are shown tabulated and analysed.

Stochastic model of nonideal mixer. Boundary conditions in batch system

1984 ◽  
Vol 49 (2) ◽  
pp. 490-505
Author(s):  
Vladimír Kudrna ◽  
Pavel Hasal ◽  
Jiří Vlček
Keyword(s):  
Experimental Data ◽  
Stochastic Model ◽  
Boundary Conditions ◽  
Closed System ◽  
Batch System ◽  
Ideal Mixer

The earlier proposed general approach for description of the non-ideal mixer is coupled with corresponding boundary conditions for the closed system. Some simplifications in this procedure result in relations which are in agreement with experimental data.

The Stress Analysis and Experimental Research of Tubular K-Joints With Overlap

1987 ◽  
Vol 109 (4) ◽  
pp. 375-380
Author(s):  
Tie-yun Chen ◽  
Wei-min Chen
Keyword(s):  
Experimental Data ◽  
Stress Concentration ◽  
Variational Method ◽  
Stress Analysis ◽  
Experimental Research ◽  
Hot Spot ◽  
Intersection Point ◽  
Tubular Joints ◽  
Photoelastic Experiment ◽  
Intersection Curves

The geometry of overlapping tubular joints, the equations of intersection curves and the coordinate of the intersection point are introduced first. The variational method for simple tubular joints is extended to the stress analysis of tubular K-joints with overlap. The computer program is compiled. The stress concentration factor and the position of the hot spot of an overlapping joint are found. For the sake of proving the feasibility of our analysis and program, the computed results are compared with experimental data of our photoelastic experiment and other experiments.

Structural dynamics of PZT thin films at the nanoscale

2005 ◽  
Vol 902 ◽  
Author(s):  
Alexei Grigoriev ◽  
Dal-Hyun Do ◽  
Dong Min Kim ◽  
Chang-Beom Eom ◽  
Bernhard Adams ◽  
...  
Keyword(s):  
Crystal Lattice ◽  
Lattice Distortion ◽  
Piezoelectric Effect ◽  
Polarization Switching ◽  
X Rays ◽  
Time Resolved ◽  
X Ray ◽  
Converse Piezoelectric Effect ◽  
Ferroelectric Capacitors ◽  
Crystal Lattice Distortion

AbstractWhen an electric field is applied to a ferroelectric the crystal lattice spacing changes as a result of the converse piezoelectric effect. Although the piezoelectric effect and polarization switching have been investigated for decades there has been no direct nanosecond-scale visualization of these phenomena in solid crystalline ferroelectrics. Synchrotron x-rays allow the polarization switching and the crystal lattice distortion to be visualized in space and time on scales of hundreds of nanometers and hundreds of picoseconds using ultrafast x-ray microdiffraction. Here we report the polarization switching visualization and polarization domain wall velocities for Pb(Zr0.45Ti0.55)O3 thin film ferroelectric capacitors studied by time-resolved x-ray microdiffraction.

The Displacement Characteristics of Piezoelectric Ceramic Micro Actuators Evaluated by Laser Interferometer

2015 ◽  
Vol 645-646 ◽  
pp. 920-925 ◽  
Author(s):  
Hong Wu ◽  
Long Biao He ◽  
Jing Lin Zhou ◽  
Ping Yang
Keyword(s):  
Piezoelectric Ceramic ◽  
Piezoelectric Coefficient ◽  
Laser Interferometer ◽  
Piezoelectric Effect ◽  
Influence Factors ◽  
Energy Transformation ◽  
Measurement Results ◽  
Loading Sequence ◽  
Converse Piezoelectric Effect ◽  
Key Parameter

Understanding and measuring the displacement characteristics of piezoelectric ceramic with electric field exciting are particularly important. The piezoelectric coefficient d33 as the indication of its displacement characteristics, is the key parameter of its energy transformation. In this paper, the characteristics of two kinds of piezoelectric ceramics, PZT4 and PZT5 were studied by the laser interferometer measurement. The influence factors of d33 were studied, including the frequency and amplitude of the exciting signal, the ways of holding, and the loading sequence. Then the measurement results of piezoelectric ceramic with laser interferometer and the quasi-static method were compared, the results showed they had consistence and the analysis of the piezoelectric coefficient d33 measurement by converse piezoelectric effect and by piezoelectric effect was discussed.

scholarly journals IMPROVING WATERPROOFING PROPERTIES IN THE WALL BASEMENT AREA BY INJECTION METHOD

2019 ◽  
Vol 2 (53) ◽  
pp. 122-127
Author(s):  
Olena Filonenko ◽  
Maryna Leshchenko ◽  
Olesia Rozdabara ◽  
Oleksandr Duka ◽  
Vlad Pashchenko ◽  
...  
Keyword(s):  
Experimental Data ◽  
Moisture Content ◽  
Experimental Research ◽  
High Quality ◽  
Injection Method ◽  
Wall Area

The article is focused on the natural experimental research of injection waterproofing impact on basement areas of existingbuildings brick walls. Two types of experimental installations for waterproofing material injection have been developed. Thesecond type turned out to be more efficient due to the fact that it could cover larger waterproofing wall area. It can possiblyspeed up the process of walls waterproofing and major repairs of buildings in general. According to the experimental data, after the injection waterproofing placement, the wall moisture content decreased by half due to the high quality waterproofingmaterial and performed installation work.

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