材料
Online ISSN : 1880-7488
Print ISSN : 0514-5163
論文
HMS採血ポンプ用新型バイモルフ圧電アクチュエータの提案
上辻 靖智長倉 秀幸川原 慎太郎黄 輝心槌谷 和義山本 英毅高野 直樹仲町 英治
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56 巻 (2007) 5 号 p. 477-482

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Health monitoring system equipped with blood extraction pump is one of the important problems for new medical technology to support the advanced age society. In this paper, a new piezoelectric actuator for blood extraction pump was proposed to increase volumetric change in pump. We devised the geometry of piezoelectric actuator with some slits that allows the stretching and contracting deformation in in-plane direction to create large deflection in out-of-plane direction. Focusing on a disc-type bimorph plate with some slits, the deformations under static electric load have been analyzed by finite element method with consideration of two geometric parameters, length l and width w of slits. The computational results indicated that the deformation of bimorph actuator changes from complex mode to single mode according to increase of slit length, and that single mode presents remarkable increase of deflection under surrounding-fixed condition. And then, a bimorph actuator with 4 slits l = 2.0, w = 0.5mm has been manufactured as an experiment. As a result, a developed actuator was proved to increase the deflection under dynamic electric load compared with a conventional bimorph actuator without slits.

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© 2007 日本材料学会
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