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	<title>MEMSuniverse &#187; piezoelectric</title>
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	<description>A Passion for Creativity &#38; Innovation</description>
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		<title>Scream ultrasonic actuator</title>
		<link>http://www.memsuniverse.com/mems/uncategorized/scream-ultrasonic-actuator.html</link>
		<comments>http://www.memsuniverse.com/mems/uncategorized/scream-ultrasonic-actuator.html#comments</comments>
		<pubDate>Mon, 09 Mar 2009 00:53:23 +0000</pubDate>
		<dc:creator>admin</dc:creator>
				<category><![CDATA[Sensors & Actuators]]></category>
		<category><![CDATA[actuator]]></category>
		<category><![CDATA[linear]]></category>
		<category><![CDATA[motor]]></category>
		<category><![CDATA[piezoelectric]]></category>
		<category><![CDATA[silent]]></category>
		<category><![CDATA[ultrasonic]]></category>

		<guid isPermaLink="false">http://www.memsuniverse.com/?p=1208</guid>
		<description><![CDATA[The Scream ultrasonic linear actuator (mnrl.monash.edu), a microactuator that can generate about 1N of force. The video shows a bit about the vibration which makes the motor work and how the piezoelectric ceramics are put into the structure. Duration : 0:3:5 Related Posts:Piezo Ultrasonic MotorsSchlieren video of ultrasonic pulse (pt1)Schlieren video of ultrasonic pulse (pt2)Micro [...]]]></description>
			<content:encoded><![CDATA[<p><img src="http://i.ytimg.com/vi/cMDs-gO8go4/2.jpg" align="left">The Scream ultrasonic linear actuator (mnrl.monash.edu), a microactuator that can generate about 1N of force. The video shows a bit about the vibration which makes the motor work and how the piezoelectric ceramics are put into the structure. </p>
<p>Duration : <b>0:3:5</b></p>
<p><span id="more-1208"></span><br /><center></center></p>
<div class="crp_related"><h3>Related Posts:</h3><ul><li><a href="http://www.memsuniverse.com/mems/optical-mems/piezo-ultrasonic-motors-diginfo.html" rel="bookmark" class="crp_title">Piezo Ultrasonic Motors</a></li><li><a href="http://www.memsuniverse.com/microfluidics/schlieren-video-of-ultrasonic-pulse-pt1.html" rel="bookmark" class="crp_title">Schlieren video of ultrasonic pulse (pt1)</a></li><li><a href="http://www.memsuniverse.com/microfluidics/schlieren-video-of-ultrasonic-pulse-pt2.html" rel="bookmark" class="crp_title">Schlieren video of ultrasonic pulse (pt2)</a></li><li><a href="http://www.memsuniverse.com/mems/uncategorized/micro-actuator-for-fiber.html" rel="bookmark" class="crp_title">Micro actuator for fiber</a></li><li><a href="http://www.memsuniverse.com/mems/2010-01-19-the-first-comb-drive-experiment-in-sut-thailand-winai-wanburee-sut-slri.html" rel="bookmark" class="crp_title">2010-01-19 The first Comb-drive experiment in SUT Thailand (Winai Wanburee SUT-SLRI)</a></li><li>Powered by <a href="http://ajaydsouza.com/wordpress/plugins/contextual-related-posts/" rel="external nofollow">Contextual Related Posts</a></li></ul></div>]]></content:encoded>
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		</item>
		<item>
		<title>Piezoelectric flow pump (bomba de fluxo piezelétrica)</title>
		<link>http://www.memsuniverse.com/microfluidics/bomba-de-fluxo-piezeletrica-piezoelectric-flow-pump.html</link>
		<comments>http://www.memsuniverse.com/microfluidics/bomba-de-fluxo-piezeletrica-piezoelectric-flow-pump.html#comments</comments>
		<pubDate>Thu, 03 Jan 2008 07:30:59 +0000</pubDate>
		<dc:creator>admin</dc:creator>
				<category><![CDATA[Microfluidics]]></category>
		<category><![CDATA[atuador]]></category>
		<category><![CDATA[bilaminar]]></category>
		<category><![CDATA[bomba]]></category>
		<category><![CDATA[de]]></category>
		<category><![CDATA[flow]]></category>
		<category><![CDATA[fluxo]]></category>
		<category><![CDATA[piezelétrica]]></category>
		<category><![CDATA[piezelétrico]]></category>
		<category><![CDATA[Piezo]]></category>
		<category><![CDATA[piezoelectric]]></category>
		<category><![CDATA[pump]]></category>

		<guid isPermaLink="false">http://www.memsuniverse.com/?p=182</guid>
		<description><![CDATA[Piezoelectric Flow Pump Prototype, based on oscillatory principle. It consists in a bimorph piezoelectric actuator with a thin plate (fish tail shaped) applied over it. The bimorph piezoelectric actuator generates oscillatory motion under an electrical input of controlled frequency and amplitude. The oscillatory motion is &#8220;amplified&#8221; by the thin plate and generates the fluid (water) [...]]]></description>
			<content:encoded><![CDATA[<p><img src="http://img.youtube.com/vi/aG22hixnUNQ/2.jpg" align="left" /></p>
<p>Piezoelectric Flow Pump Prototype, based on oscillatory principle.<br />
It consists in a bimorph piezoelectric actuator with a thin plate (fish tail shaped) applied over it.<br />
The bimorph piezoelectric actuator generates oscillatory motion under an electrical input of controlled frequency and amplitude.<br />
The oscillatory motion is &#8220;amplified&#8221; by the thin plate and generates the fluid (water) flow.<br />
The application of the thin plate promoved a flow rate (cc/min) increase up to 40% in some cases, when compared to the performance  of the bimorph actuator by itself.<br />
During the experimental characterization phase it was noticed a great influence of the prototype channel profile over the water flow and consequently over the fluw pump performance.<br />
Due to its characteristics, that are low pressure and average flow rate, this kind of flow pump is basically applied on micro scale.<br />
Many tests, with different thin plate shapes were conduced. The best results were found with the thin plate presented in this video.</p>
<p>Protótipo de bomba de fluxo piezelétrica baseada no princípio oscilatório.<br />
Composto por um atuador piezelétrico bilaminar e uma carenagem em cobre (formato de cauda de peixe) colocada sobre o mesmo.<br />
O atuador piezelétrico gera movimentos oscilatórios sob a excitação de uma tensão elétrica de freqüência e amplitude controladas. Estas oscilações são &#8220;amplificadas&#8221; pela carenagem e produzem o deslocamento do fluido (água).<br />
O ganho em vazão(ml/min) obtido pela aplicação de uma carenagem chegou a até 40% em alguns casos, quando comparado ao desempenho obtido somente com o atuador bilaminar em operação.<br />
Durante os ensaios percebeu-se uma grande influência do formato do canal no escoamento do fluido e portanto no desempenho da bomba de fluxo.<br />
Este tipo de bomba tem como característica básica baixa pressão e vazão mediana (considerando sua aplicação em projetos de pequena escala).<br />
Foram realizados testes com diversos formatos de carenagem sendo a configuração de melhor desempenho mostrada no vídeo.</p>
<p>Duration : <strong>0:0:43</strong></p>
<p><span id="more-182"></span></p>
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