High frequency and high intensity ultrasonic transducers for medical applications using oriented piezoelectric thick films by hydrothermal method

2016 ◽  
Vol 140 (4) ◽  
pp. 3374-3374 ◽  
Author(s):  
Mutsuo Ishikawa ◽  
Yosuke Uchida ◽  
Marie Tabaru ◽  
Minoru Kurosawa ◽  
Nobuyuki Kosuge ◽  
...  
Keyword(s):  
Hydrothermal Method ◽  
High Intensity ◽  
High Frequency ◽  
Thick Films ◽  
Ultrasonic Transducers ◽  
Medical Applications

Design, manufacturing and packaging of high frequency micro ultrasonic transducers for medical applications

2011 ◽  
Author(s):  
Jack Hoyd-Gigg Ng ◽  
Robert T. Ssekitoleko ◽  
David Flynn ◽  
Robert W. Kay ◽  
Christine E. M. Demore ◽  
...  
Keyword(s):  
High Frequency ◽  
Ultrasonic Transducers ◽  
Medical Applications

PMN-PT single crystal thick films on silicon substrate for high-frequency micromachined ultrasonic transducers

2009 ◽  
Vol 98 (1) ◽  
pp. 233-237 ◽  
Author(s):  
J. Peng ◽  
S. T. Lau ◽  
C. Chao ◽  
J. Y. Dai ◽  
H. L. W. Chan ◽  
...  
Keyword(s):  
Single Crystal ◽  
Silicon Substrate ◽  
High Frequency ◽  
Thick Films ◽  
Ultrasonic Transducers

Resonant BLDC Motor Drive System for Medical Applications

2019 ◽  
Vol 14 ◽  
Author(s):  
C. Vidhya ◽  
V. Ravikumar ◽  
S. Muralidha
Keyword(s):  
High Frequency ◽  
Pulse Width Modulation ◽  
Power Converter ◽  
Low Power Consumption ◽  
Motor Drive ◽  
Medical Applications ◽  
Bldc Motor ◽  
Three Phase ◽  
High Frequency Ac ◽  
Motor Drive System

: The objective of this paper is to implement an ac link universal power converter controlled BLDC motor for medical applications. The ac link universal power converter is a soft switched high frequency ac link converter, created using the parallel combination of an inductor and a capacitor. The parallel ac link converter handle the ac voltages and currents with low reactive ratings at the link and offers improved power factor, low power consumption, more efficiency and less weight on comparison with the traditional dc link converter. Because of the high throughput, BLDC motors are preferred widely medical applications. A modulation technique called Space Vector Pulse Width Modulation (SVPWM) is used to generate the three phase power for the BLDC motors from the input DC supply. To validate the proposed system, simulations are performed in MATLAB – Simulink and an experimental prototype is constructed to supplement the simulation results.

scholarly journals Resonanz-Raman-Effekt von Thiocyanatkomplexen einiger Übergangsmetalle

1970 ◽  
Vol 25 (10) ◽  
pp. 1394-1400 ◽  
Author(s):  
W. Krasser ◽  
H. W. Nürnberg
Keyword(s):  
Raman Spectrum ◽  
Infrared Spectra ◽  
High Intensity ◽  
High Frequency ◽  
Resonance Raman ◽  
Ammonium Salts ◽  
Iron Cobalt ◽  
Decay Products ◽  
Thiocyanate Complexes ◽  
Resonance Raman Spectra

Abstract The thiocyanates of the transition metals iron, cobalt, copper as well as of rhenium and of tech-netium appear in solution as strongly coloured complexes. The resonance raman bands in the sol-vent acetonitrile are investigated. To achieve an unambiguous identification the infrared spectra were recorded too. The change in position and structure of the acetonitrile bands indicates strong complexation of iron, cobalt and copper with acetonitrile, thus indicating the existence of mixed acetonitrile-thiocyanate complexes. The resonance raman spectra of the rhenium-and technetium-thiocyanates present as tetramethyl ammonium salts show however no raman-and infrared-bands of complexed acetonitrile molecules.In the raman spectrum of the thiocyanates of iron, cobalt and copper mainly the totally sym-metric C≡N, S-C, Me-S and Me-N valence vibrations are observed, among which the S-C vibration shows a remarkably high intensity. Besides, a series of bands is obtained which is inter-preted partly as caused by decay products, and partly as bands of complexed acetonitrile. The thiocyanates of rhenium and of technetium show the three possible valence vibrations only. The high frequency of the S-C valence indicates the N-coordination of the thiocyanate group.

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