Testing Mechanical and Electrical Defects in Piezoceramic Materials Resulting from Ultrasonic Vibrations

The work presents recommendations related to the selection and installation of high power piezo ceramic rings dedicated to simultaneous power supply and data transmission for the purpose of extending life in their operation. Mechanical and electrical defects in piezoceramic elements of conical actuators were presented. The issue is important in the case when energy and information are transmitted at the same time using upper acoustic waves to autonomic wireless measurement nodes (WMN) in mechanical construction elements. A laboratory ultrasonic actuator was made and used to test ceramic rings. Additionally a dedicated vibration sensor was made and a measurement system for determination of frequency response of high power actuators was developed. Identification of the material used to make the ceramic rings and feeding electrodes was conducted. Next calibration tests of conical piezoelectric actuators were conducted and their defects were tested.

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The Study of Wireless Measurement System for Neuro-Motor Reaction Time

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.472-475.2850 ◽

2012 ◽

Vol 472-475 ◽

pp. 2850-2853

Author(s):

Shu Gang Li ◽

Zhi Wu Zhu ◽

Fei Shen

Keyword(s):

Reaction Time ◽

Measurement System ◽

Data Transmission ◽

Wireless Data ◽

Measurement Device ◽

The Core ◽

Front End ◽

Wireless Data Transmission ◽

Reaction Time Measurement ◽

Wireless Measurement

The purpose of this study was to introduce the design and realization about a measurement system, which is based by accelerometer ADXLl05 and wireless data-transmission module for starting line of athlete’s reaction time. This system plotted curves of players’ reaction time using 89C205l as the core of the front-end of the system reaction time measurement device, the measurement device take real-time captures players' reaction time, and then sent over the wireless data-transmission module player reaction time to the PC machine to display, and to record the reaction time.

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Design of Power Supply for Driving High Power Piezoelectric Actuators

2008 IEEE Industry Applications Society Annual Meeting ◽

10.1109/08ias.2008.305 ◽

2008 ◽

Cited By ~ 6

Author(s):

Rongyuan Li ◽

Michael Loenneker ◽

Norbert Froehleke ◽

Joachim Boecker

Keyword(s):

High Power ◽

Power Supply ◽

Piezoelectric Actuators

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Experimental Research on Excitation Condition and Performance of Airflow-Induced Acoustic Piezoelectric Generator

Micromachines ◽

10.3390/mi11100913 ◽

2020 ◽

Vol 11 (10) ◽

pp. 913

Author(s):

Zhipeng Li ◽

Jinghao Li ◽

Hejuan Chen

Keyword(s):

Power Generation ◽

Experimental Research ◽

Power Supply ◽

Acoustic Waves ◽

Vibration Sensor ◽

Sound Waves ◽

Power Sources ◽

Piezoelectric Generator ◽

Design Idea ◽

Power Generation Performance

This paper aims to present a novel airflow-induced acoustic piezoelectric generator that can be used to solve the problem of insufficient power supply of modern intelligent fuzes. The sound waves induced by airflow are the key to power generation performance. It is proposed that an edge tone frequency equal to the acoustic mode frequency is a sufficient condition for evoked acoustic waves, and a design idea and scheme for a universal fuze power supply is provided. We establish the vibration model of the airflow-induced acoustic piezoelectric generator. According to the model, the experimental research on the power generation performance shows that the sound pressure frequency, vibration displacement frequency, and output voltage frequency are consistent. The model provides a design idea for a vibration sensor. At the flow rate of 100.8 m/s, the output power is 45.3 mW, which is much higher than the fuze power sources such as the magnetic backseat generator. Therefore, the airflow-induced piezoelectric generator can effectively solve the problem of the modern fuze less types of power supply and low output energy.

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KEK Digital Accelerator and the Next Generation of High Power Switching Power Supply

IEEJ Transactions on Fundamentals and Materials ◽

10.1541/ieejfms.132.13 ◽

2012 ◽

Vol 132 (1) ◽

pp. 13-16

Author(s):

Ken Takayama ◽

Katsuya Okamura

Keyword(s):

High Power ◽

Power Supply ◽

Switching Power Supply ◽

Next Generation ◽

Power Switching ◽

Switching Power

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High Power UPS Selection Methodology and Installation Guideline for High Reliability Power Supply

Renewable Energy and Power Quality Journal ◽

10.24084/repqj03.310 ◽

2005 ◽

Vol 1 (03) ◽

pp. 396-402

Author(s):

A. Sudrià ◽

◽

E. Jaureguialzo ◽

A. Samper ◽

R. Villafáfila ◽

...

Keyword(s):

High Power ◽

Power Supply ◽

High Reliability ◽

Selection Methodology

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Determination of cores electrification during the flow in the modified Wurster apparatus

Technical Sciences ◽

10.31648/ts.2905 ◽

2016 ◽

Vol 1 (20) ◽

pp. 5-15

Author(s):

Wojciech Ludwig ◽

Tadeusz Mączka

Keyword(s):

Measurement System ◽

Charge Accumulation ◽

Laboratory Conditions ◽

Pharmaceutical Materials

The purpose of this paper was presentation of the value of cores electrification during their flow in the modified Wurster apparatus, applied for dry encapsulation of pharmaceutical materials. Previous works of the authors dealt with vulnerability of the particles of different diameter, produced by SYNTAPHARM (Cellets 1000, 700 and 100) on electrification in laboratory conditions. The presented work gives the results of examination on particles electrification in real conditions of their stable circulation in a column. The measurement system, that was applied, allowed determination of electrification potential and electrification current. Those quantities, which are the measures of charge accumulation on cores were determined for several particles (Cellets 1000, 700 and 500) with the different humidity, for different mass of the bed and spouting gas velocities.

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