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Investigation on MEMS Based Thermal Sensor for Cancer Detection

A. V. Lakshmi[1], K. C. Devi[1]
[1]PSG College of Technology, Coimbatore, Tamil Nadu, India

This paper presents the design and simulation of a thermal sensor using COMSOL Multiphysics® software for the detection of low body temperature syndrome which can allow the early detection of cancer. This sensor is made of an alloy consisting of two materials with different coefficients of thermal expansion. The main objective of this work is to investigate the structural change in the sensor ...

Design and Simulation of Electroactive Polymer-Based Artificial Muscles for Biomedical Application

A. S. Tripathi [1], B. P. Chatterjee [2], S. Das [3],
[1] Advanced Technology Development Centre, Indian Institute of Technology Kharagpur, Kharagpur, India
[2] Dept. of Cardiology, Medical College and Hospital, Kolkata, India
[3] School of Medical Science and Technology, Indian Institute of Technology Kharagpur, Kharagpur, India

Electro-active polymer (EAP) based actuators are one of the suitable contenders for use in artificial muscles based bio-medical application because of their bio compatibility and lower active actuation voltage requirement phenomenon. At present Ionic polymer metal composites (IPMC), a type of EAP based actuator are being developed for various applications. IPMC actuator generally consist ...

Modeling, Simulation, and Optimization of Piezoelectric Bimorph Transducer for Broadband Vibration Energy Harvesting in Multi-Beam and Trapezoidal Approach

N. Chen [1], V. Bedekar [1],
[1] Department of Engineering Technology, Middle Tennessee State University, Murfreesboro, TN, USA

The objective of the research is to design a broadband energy harvester device through the multi-beam approach and non-linear trapezoidal geometry approach. The performance of two piezoelectric PZT-PZN polycrystalline ceramic composition samples are simulated in COMSOL Multiphysics®, and results are compared using series configuration of a bimorph energy harvester which vibrates near the its ...

Evaluation of Tensile Modulus of Carbon Nanotube Bundle Based Composite with Interface Using Finite Element Method

M. S. Islam, F. O. Riktan, S. C. Chowdhury, M. M. R. Chowdhury, and S. Ahmed
Bangladesh University of Engineering & Technology (BUET)
Dhaka, Bangladesh

Carbon Nanotubes (CNTs) have remarkable mechanical, thermal and electrical properties. The properties of CNTs depend on atomic arrangement (how the sheets of graphite are rolled), the diameter and length of the tubes and morphology of nanostructure. In this paper effective elastic properties of CNT based polymer composites are evaluated using a square Representative Volume Element (RVE) in ...

Design and Simulation of MEMS based PZT energy generator.

A. Deshpande[1]
[1]B.V.Bhoomaraddi College of Engineerring & Technology, Hubli, Karnataka, India

At present, a great deal of research effort has been directed to find eco-friendly and renewable sources of energy. With the rising costs of crude oil and petroleum, along with the derogatory effects that they pose to the environment, this sort of approach is of utmost importance. This has also led to the search for alternate methods of transforming the various forms of energy into electrical ...

Modeling Partially Absorbing Biosensors

D. Kappe[1], A. Hütten[1]
[1]Bielefeld University, Bielefeld, Germany

Designing and constructing a lab-on-a-chip device poses a variety of questions. Transport of all required substances, detection of the analyte and its deposition on a sensor have to be incorporated. Different strategies have been developed to achieve good coverages of the sensor, like employing electric or magnetic gradients. On the basis of a ramp like structure, the binding of the analyte to a ...

COMSOL在压阻式柔性压力传感器中的应用

王宗荣 [1,2], 王珊 [1],
[1] 浙江大学,杭州,中国
[2] 香港大学,香港,中国

引言:柔性压力传感器在电子皮肤、智能假肢以及医疗监测诊断等领域发挥着十分重要的作用。因此压力传感器需要很高的灵敏度、较宽的敏感区间及稳定的性能。利用典型有机硅 PDMS 作为支撑层,聚合物 PEDOT: PSS 作为导电感应层制得的高度不均一微突结构的双压敏机制压阻传感器灵敏度达到了 851kPa-1。其探测范围广,性能优异,为解决目前压阻传感器中灵敏度低、敏感压力区间窄的难题提供了新思路。 COMSOL MULTIPHYSICS® 软件的使用:本文利用 COMSOL Multiphysics® 软件建立了不均匀微突结构的压阻式传感器模型,采用了结构力学与电流场两个物理场,通过电子接触对进行多物理场的耦合。研究在指定位移情况下,压阻式传感器电阻与电流的变化,从而得到灵敏度,验证不均匀微突结构压阻式压力传感器的双作用机制。同时,与均一微金字塔结构的压力传感器进行比较 ...

Near-Field of Resonating Piezoelectric Membrane Used as Ultrasound Transducer

V. Tzanov [1], J. Munoz [1], F. Torres [1], N. Barniol [1],
[1] Universitat Autonoma de Barcelona, Bellaterra, Spain

Micro-machined ultrasound transducers have a wide range of applications. As a sensor or actuator they can be used for measuring fluid speed and direction, to mix and excite particles (sonication), for taking images (ultrasonography), for non-destructive testing and many other purposes in wide variety of fields. For this particular study, a simplified model of micro-machined piezoelectric ...

Green's Function Approach to Efficient 3D Electrostatics of Multi-Scale Problems

C. Roman [1], L. Schmid [1], L. Stolpmann [1], C. Hierold [1],
[1] ETH, Zurich, Switzerland

We present an efficient method to compute efficiently the general solution (Green's Function) of the Poisson Equation in 3D. The method proves its effectiveness when dealing with multi-scale problems in which lower dimensional objects, such as nanotubes or nanowires (1D), are embedded in 3D. Our case-study is a field effect device with a carbon nanotube channel having diameter around 2 nm and ...

The Fabrication of a New Actuator Based on the Flexoelectric Effect

S. Baskaran[1], S. Thiruvannamalai[1], N. Ramachandran[1], F.M. Sebastian[1], and J.Y. Fu[1]
[1]State University of New York at Buffalo, Buffalo, New York, USA

This paper presents a novel methodology towards the design, analysis, and the fabrication process involved in developing a cost effective method to create a piezoelectric actuator by means of the flexoelectric effect. The basic physical equations of the flexoelectric effect and the qualitative analysis of the flexoelectric actuator are done using COMSOL Multiphysics. This effect is used to align ...