目前國內外對於微幫浦的相關研究大多數是以壓電片作為致動系統，所以本實驗室在先前研究裡也是採用此種致動器，然而經由先前的實驗結果發現壓電致動器具有高驅動電壓、振幅過小以及能量損耗大等問題。此外，無閥式微幫浦入口流道的逆流問題也會影響微幫浦的性能。因此，本研究發展一種新型的致動系統用來取代壓電致動器，並且利用在腔室內部設計固定止回閥體來減少回流的情況。SDM (Shape Deposition Manufacturing)製程為一種層加工技術 ，利用來製作微幫浦流道與腔室特徵。
利用小型DC馬達作為新型的致動系統，透過傳動組件將馬達的旋轉運動轉換成往復式運動來改變腔室體積的變化。新型致動系統的振動情形相似於壓電致動器，但其振動幅度較大，頻率低，所需驅動電壓可從50V降至9V。這種新型的致動系統證實了能夠利用在先前研究的角錐式無閥微幫浦上，也能應用於文獻上的平壁式微幫浦。流量測試結果得出擴散角20°、傾斜角20°之微幫浦在頻率60Hz下，最大流量可達4283.99μl/min。此外，兩個固定止回閥體的設計，以減少回流的影響進行研究，其結果在設計一的閥體可增加約三分之一的流量。

Most researches in valveless micropump utilized piezoelectric actuators, so did previous studies in our laboratory. However, the piezoelectric actuator has problems of high driving voltage, too small amplitude, and large energy consumption. Besides, the existence of back flow of the valveless micropump affects micropump’s performance. Therefore, this research developed a new actuation system to replace piezoelectric actuator, and designed fixed valves in the chamber of the micropump to reduce back flow situations. SDM (Shape Deposition Manufacturing) process, a layered manufacturing technique, was used to fabricate micropump channels and the chamber.
A miniature DC motor was used in the new actuation system. Through a transmission mechanism, the rotational movement of the motor became reciprocating motion to increase and decrease chamber’s volume in each cycle. The result of this new actuation system was similar to the vibration of piezoelectric actuator, but the amplitude was higher, the frequency was lower, and the required voltage was only 9V instead of 50V. This new actuation system was proved to be able to actuate our previous valveless pyramidal diffuser micropump designs and flat-walled diffuser pump in the literatures. The maximum flow rate of the pyramidal micropump with diffuser angle of 20 degrees and inlet slant angle of 20 degrees was 4283.99μl/min at 60Hz. Moreover, two fixed valve designs to reduce back flow effects were investigated. As a result, the design 1 could increase about one-third of the flow rate.

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