A Low Frequency High-Power PMNT Flextensional Transducer

2019 ◽  
Author(s):  
Hui-chao ZHANG ◽  
Shi-ping LI ◽  
Xin-ran XU
Keyword(s):  
High Power ◽  
Low Frequency ◽  
Flextensional Transducer

Analysis and design of low frequency and high power flextensional transducer with double-grooves

2019 ◽  
Vol 149 ◽  
pp. 25-31
Author(s):  
Rongjing Guo ◽  
Shiyang Li ◽  
Tangan Li ◽  
Xuan Sun ◽  
Luan Lin ◽  
...  
Keyword(s):  
High Power ◽  
Low Frequency ◽  
Analysis And Design ◽  
Flextensional Transducer

scholarly journals D-Dot Sensor Response Improvement in the Evaluation of High-Power Microwave Pulses

Electronics ◽  
2021 ◽  
Vol 10 (2) ◽  
pp. 123
Author(s):  
Jacek Jakubowski ◽  
Marek Kuchta ◽  
Roman Kubacki
Keyword(s):  
High Power ◽  
Critical Infrastructure ◽  
Quantitative Description ◽  
Low Frequency ◽  
Digital Processing ◽  
High Energy ◽  
Time Duration ◽  
High Power Microwave ◽  
Time Waveform ◽  
Power Microwave

This article investigates the issue of measuring high-power microwave (HPM) pulses. The high energy of these pulses poses a significant threat to many electronic systems, including those used to manage critical infrastructure. This work focuses on requirements for a potential portable measurement device and suggests the application of a method for this purpose, involving the use of a D-dot sensor and a rapid A/D converter. The applied converter enables recording the time waveform on the measuring chain output, also in the case of repetition and time duration of HPM signals. The authors also present a quantitative description of signal processing by the analogue section of the measurement chain solution presented herein and suggest algorithms for digital processing of the signals, the objective of which is to minimize low-frequency interference in the process of reconstructing the time waveform of an electric field using numerical integration.

A comparative fluid flow characterisation in a low frequency/high power sonoreactor and mechanical stirred vessel

2015 ◽  
Vol 27 ◽  
pp. 359-373 ◽  
Author(s):  
Baharak Sajjadi ◽  
Abdul Aziz Abdul Raman ◽  
Shaliza Ibrahim
Keyword(s):  
Fluid Flow ◽  
High Power ◽  
Low Frequency ◽  
Stirred Vessel

Correlation between forward-reverse low-frequency noise and atypical I–V signatures in 980 nm high-power laser diodes

2015 ◽  
Vol 55 (9-10) ◽  
pp. 1741-1745 ◽  
Author(s):  
P. Del Vecchio ◽  
A. Curutchet ◽  
Y. Deshayes ◽  
M. Bettiati ◽  
F. Laruelle ◽  
...  
Keyword(s):  
High Power ◽  
Laser Diodes ◽  
Low Frequency ◽  
Frequency Noise ◽  
Low Frequency Noise ◽  
High Power Laser ◽  
Power Laser

scholarly journals Piezoelectric Energy Harvesting with an Ultrasonic Vibration Source

Actuators ◽  
2019 ◽  
Vol 8 (1) ◽  
pp. 8
Author(s):  
Tao Li ◽  
Pooi Lee
Keyword(s):  
Energy Harvesting ◽  
High Power ◽  
High Frequency ◽  
Energy Harvester ◽  
Impedance Matching ◽  
Low Frequency ◽  
Vibration Source ◽  
Piezoelectric Energy ◽  
Power Ultrasonic ◽  
Ultrasonic Cutting

A piezoelectric energy harvester was developed in this paper. It is actuated by the vibration leakage from the nodal position of a high-power ultrasonic cutting transducer. The harvester was excited at a low displacement amplitude (0.73 µmpp). However, its operation frequency is quite high and reaches the ultrasonic range (24.4 kHz). Compared with another low frequency harvester (66 Hz), both theoretical and experimental results proved that the advantages of this high frequency harvester include (i) high current generation capability (up to 20 mApp compared to 1.3 mApp of the 66 Hz transducer) and (ii) low impedance matching resistance (500 Ω in contrast to 50 kΩ of the 66 Hz transducer). This energy harvester can be applied either in sensing, or vibration controlling, or simply energy harvesting in a high-power ultrasonic system.

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