Piezoelectric vibrator on mirror polished substrate

1987 ◽  
Vol 81 (2) ◽  
pp. 581-581
Author(s):  
Takeshi Nakamura
Keyword(s):  
Piezoelectric Vibrator ◽  
Polished Substrate

scholarly journals Design and Experiment Using Flexible Bumps for Piezoelectric-Driven Hydraulically Amplified Braille Dot Display

Micromachines ◽  
2021 ◽  
Vol 12 (7) ◽  
pp. 795
Author(s):  
Xiaochao Tian ◽  
Yuze Sun ◽  
Zhiyao Li ◽  
Hu Wang ◽  
Zhicong Wang ◽  
...  
Keyword(s):  
Structural Parameters ◽  
Water Discharge ◽  
Experimental Tests ◽  
Output Displacement ◽  
Amplification Ratio ◽  
Fluid Resonance ◽  
Piezoelectric Vibrator ◽  
Flexible Film ◽  
Touch Sensitivity ◽  
Sensitivity Standard

This paper describes the design of a piezoelectric-driven hydraulically amplified Braille-flexible bump device that enables the flexible formation of Braille characters. A piezoelectric vibrator is used to excite fluid resonance in a cavity, and displacement is realized by compressing the fluid, allowing Braille character dots to be formed. First, the structural design and working principle of the device, as well as the method used to drive the fluid, are explained. Expressions for the output displacement and amplification ratio of the flexible film and piezoelectric vibrator are then obtained through kinetic analysis of the system unit. Subsequently, the structural parameters that affect the output displacement and the liquid amplification are described. Finally, experimental tests of the system are explained. The results indicate that the output displacement of the contact formed by the flexible film reaches 0.214 mm, satisfying the requirements of the touch sensitivity standard for the blind, when the fluid cavity diameter measures 31 mm and the resonance frequency is 375.4 Hz. The corresponding water discharge is 8.8 mL. This study proves that constructing a Braille bump device in this way is both feasible and effective.

Investigation of the Splat Deposition Behavior onto a Composite Coating in Cold Spray

2018 ◽  
Vol 941 ◽  
pp. 1639-1644
Author(s):  
Xin Chu ◽  
Phuong Vo ◽  
Stephen Yue
Keyword(s):  
Electron Microscope ◽  
Composite Coating ◽  
Cold Spray ◽  
Spray Deposition ◽  
Cold Spraying ◽  
Single Component ◽  
Optical Profilometry ◽  
Deposition Behavior ◽  
Polished Substrate ◽  
Scanning Electron

The splat test is usually generated by low feed rate cold spraying of particles onto an as-polished substrate and it can be considered as a monolayer coating deposition. In this study, in order to investigate cold spray deposition mechanisms, Fe splats were sprayed onto the cold-sprayed single component 316L, Fe, and a composite 90Fe coatings. Results showed that although there is only 3.6 vol.% of 316L in the composite 90Fe coating, Fe splats exhibit a much better deposition behavior onto the 90Fe as compared with the single component Fe coating. To explain this observation, Fe splat samples were characterized using the scanning electron microscope (SEM), optical profilometry, splat adhesion tests, and splat nanoindentation. Finally, a preliminary explanation towards the Fe splat deposition behavior onto the composite coating was drawn.

Theoretical Analysis and FEM Simulation of Piezoelectric Vibrator Used in Ultrasonic EDM System

2013 ◽  
Vol 694-697 ◽  
pp. 3020-3024
Author(s):  
Hong Bing Wang ◽  
Zhi Rong Li ◽  
Chun Hua Sun
Keyword(s):  
Theoretical Analysis ◽  
Natural Frequencies ◽  
Dynamic Performance ◽  
Three Dimensional ◽  
Fem Simulation ◽  
Model Analysis ◽  
Dimensional Model ◽  
Three Dimensional Model ◽  
Piezoelectric Vibrator ◽  
Working Frequency

The dynamic performance of the piezoelectric vibrator used in ultrasonic EDM machine in natural frequencies has a great effect on machining precision. Firstly, Through theoretical analysis the dynamic characteristics of the piezoelectric vibrator is obtained. Then the three-dimensional model of the piezoelectric vibrator is constructed by using PRO/E software, and model analysis is carried by using FEM software. Through theoretical analysis and FEM simulation, the appropriate working frequency and mode of the piezoelectric vibrator was found, and the piezoelectric vibrator was fabricated. Experimented results show that the model analysis of frequency is accord with that of FEM.

An emulsion generating microchannel device oscillated by piezoelectric vibrator

2010 ◽  
Author(s):  
Takefumi Kanda ◽  
Koichi Suzumori ◽  
Takuya Harada ◽  
Tsutomu Ono ◽  
Sotaro Iwabuchi ◽  
...  
Keyword(s):  
Piezoelectric Vibrator ◽  
Microchannel Device

scholarly journals Influence of the Power Generation Capacity of the Structural Parameters of a Piezoelectric Bimorph

2021 ◽  
Vol 2021 ◽  
pp. 1-7
Author(s):  
Xiaochao Tian ◽  
Jinzhi Zhu ◽  
Zhicong Wang ◽  
Hu Wang ◽  
Yuze Sun ◽  
...  
Keyword(s):  
Power Generation ◽  
Integrated Circuits ◽  
Energy Supply ◽  
Output Voltage ◽  
Structural Parameters ◽  
Electronic Devices ◽  
Generation Effect ◽  
Modulus Ratio ◽  
Piezoelectric Vibrator ◽  
Generation Capacity

With the popularization of integrated circuits, MEMS, and portable electronic devices, chemical batteries have many disadvantages as the main energy supply method, such as large size, high quality, and limited energy supply life, requiring regular replacement, resulting in waste of materials, environmental pollution, and other issues. From the above reasons, energy harvesting technology plays an important role in improving the efficiency and life of electronic equipment. In order to explore the influence of the bimorph piezoelectric vibrator’s structural parameters on the power generation capacity, this paper establishes a cantilever beam rectangular bimorph piezoelectric vibrator power generation model, derives the mathematical expression of the bimorph piezoelectric vibrator power generation, and determines the parameter factors that affect the power generation effect. Using MATLAB simulation analysis to obtain the influence relationship curve of system output voltage and structural parameters, the experiment tests the influence law of output voltage and thickness ratio, width-to-length ratio, and Young’s modulus ratio; the test results are consistent with the theoretical analysis, verifying the theory and the correctness of the analysis. The results show that when the thickness ratio is 0.58 and the width-to-length ratio is 1, the power generation effect of the piezoelectric vibrator is the best to reach 14.5V; the power generation capacity of the transducer is inversely proportional to Young’s modulus ratio. This research provides a new idea for the popularization of integrated circuits, MEMS, and portable electronic devices.

Design of High Frequency Fatigue Testing Machine Driven by Piezoelectric Vibrator

2012 ◽  
Vol 220-223 ◽  
pp. 543-548
Author(s):  
Meng Jie ◽  
Hai Feng Xie ◽  
Yan Liu ◽  
Zhi Gang Yang
Keyword(s):  
High Frequency ◽  
Fatigue Testing ◽  
Testing Machine ◽  
Fatigue Property ◽  
Maximum Load ◽  
Load Level ◽  
Piezoelectric Resonance ◽  
Piezoelectric Vibrator ◽  
Plate Spring ◽  
Working Principle

In order to measure the fatigue property of the small and hard brittle components working under conditions of the little amplitude, high frequency force, a novel kind of resonant high frequency fatigue testing machine which is driven by the piezoelectric vibrator (PZT、PLZT or PMN) has been proposed. Firstly, the working principle of the piezoelectric resonance high frequency fatigue testing machine is analyzed, and the dynamic model of the fatigue testing machine is established to get the systemic dynamic characteristics. Then a prototype is designed and produced. Finally, the maximum load on the sample is measured by the test with the machine. The results indicate that the maximum load on the sample is 23.4N-98.1N when changing the voltage (100V-250V) and the thickness of the plate spring (1.1mm-0.6mm). The prototype made in this paper is suitable for the tensile and fatigue testing with the load level mentioned above under the condition of little amplitude and high frequency force.

Damped Capacitance Elimination in Piezoelectric Vibrator Using Operational Amplifier Circuit

1996 ◽  
Vol 35 (Part 1, No. 5B) ◽  
pp. 3042-3045
Author(s):  
Yoshiro Tomikawa ◽  
Chiharu Kusakabe ◽  
Kazumasa Ohnishi ◽  
Katsutoshi Sakurai ◽  
Masayuki Tanaka
Keyword(s):  
Operational Amplifier ◽  
Amplifier Circuit ◽  
Piezoelectric Vibrator
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