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Characterization of rectangular shaped perforated Piezoelectric MEMS Directional Microphone inspired by Ormia ochracea |
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Ashiqur Rahaman(Korea University of Technology and Education, Korea), Asif Ishfaque(University of Engineering and Technology, Lahore, Pakistan), Byungki Kim(Korea University of Technology and Education, Korea) |
| : In this paper, we present a unique rectangular shaped perforated piezoelectric MEMS directional microphone inspired by the hearing organ of female fly Ormia ochracea. The diaphragm consists of two wings which are coupled in the middle. Here, the thermal-mechanical noise and damping effects are minimized by adopting Aluminium nitride (AlN) based sensing scheme and designing 240 (15x16) circular shaped holes per wings.The measured directivity pattern shows a good agreement with the applied acoustic pressure from different directions. |
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Design of 2-Dof Dielectric Elastomer Finger Toward an Intimate-Contact Gripper |
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Geon-Woo Hwang, Ki-Uk Kyung(Korea Advanced Institute of Science and Technology, Korea) |
| This paper describes an initial progress toward a flexible gripper based on dielectric elastomer (DE) actuator. 2-dof DE fingers are designed for creating stretch and bending. We are expecting the proposed structure guarantees an intimate-contact between a robot finger-pad and a target object, and enhances grasping capability. |
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Transparent soft micro-actuator array for programmable large force response |
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Sungryul Yun, Suntak Park(Electronics and Telecommunications Research Institute, Korea), Ki-Uk Kyung(Korea Advanced Institute of Science and Technology, Korea) |
| This paper reports a soft, transparent and frameless dielectric elastomer micro-actuators array that can provide programmable large normal forces at localized area on flexible surfaces. Each micro-actuator can directly expand to upward direction responding to electrically induced contraction by electrostatic pressure. During synchronized operation of the micro-actuators, the dynamic force output is large enough to be used as human tactile interfaces. These benefits allow the actuators to be potentially used in a number of human interaction applications on next generation wearable interfaces. |
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Application of Thin Film Focus Tunable Lens |
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Sang-Youn Kim(Korea University of Technology and Education, Korea) |
| We present an electrically focus-tunable tiny lens and introduce its application for mobile devices. The design focuses on the proposed module are to produce sufficiently large focus variation and to avoid complex mechanical structure. To this end, this study fabricates an electroactive, plasticized PVC gel. We put the PVC gel between two plates, which are patterned two annular electrodes. The gel is pressed with the rigid electrodes to be formed a bi-convex lens. We show that the focal point of the fabricated gel lens is changed according to the input voltage, and investigate its durability. |
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