Hier finden Sie Veröffentlichungen und Präsentationen der weltweit stattfindenden COMSOL-Konferenzen. In diesen präsentieren Ihre Fachkollegen ihre neuesten mit COMSOL Multiphysics entwickelten Produkte und Ideen. Die Forschungsthemen umfassen ein weites Feld von Industrien und Anwendungsbereichen, die von Mechanik und Elektronik über Strömungen bis zur Chemie reichen. Nutzen Sie die Quick Search, um die zu Ihrem Forschungsbereich passenden Präsentationen zu finden.

Sensitivity Analysis of Different Models of Piezoresistive Micro Pressure Sensors

S. Meenatchisundaram[1], S. M. Kulkarni[2], S. Bhat
[1]Department of Instrumentation and Control Engineering, Manipal Institute of Technology, Manipal, Karnataka, India.
[2]Department of Mechanical Engineering, National Institute of Technology, Surathkal, Karnataka, India.

Piezoresistive pressure sensors have received much attention over the years because of low cost, simple measurement techniques, etc. There is a challenge in design with respect to appropriate positioning, shape and temperature compensation. Different models of piezoresistive pressure sensors are proposed to enhance its sensitivity in terms of output voltage. This paper aims in sensitivity ...

Extraction of Electrical Equivalent Circuit of One Port SAW Resonator Using FEM-based Simulation

A. K. Namdeo [1], H. B. Nemade [1],
[1] Department of Electronics and Electrical Engineering, Indian Institute of Technology Guwahati, Guwahati, Assam, India

The paper presents a method of extraction of electrical equivalent circuit of a one port surface acoustic wave (SAW) resonator from the results of simulation based on finite element method (FEM) using COMSOL Multiphysics software. A one port SAW resonator consists of large number of periodic interdigital transducer (IDT) electrodes fabricated on the surface of a piezoelectric substrate. A ...

Design of a MEMS Capacitive Comb-drive Accelerometer

T. Kaya[1], B. Shiari[2], K. Petsch[1], and D. Yates[2]
[1]Central Michigan University, School of Engineering and Technology, Mount Pleasant, MI
[2]University of Michigan, Dept. of Electrical Engineering and Computer Science, Ann Arbor, MI

In this work, a MEMS low-g accelerometer with three sensitive directions is designed for health monitoring applications. The accelerometer may have different sensitivity in different axes. The proof-mass of the device is suspended by four serpentine springs, and the comb drive structure is used to form the differential capacitor to measure the displacement of the proof-mass. The structure has an ...

Nanowire Based Flexible Piezoelectric Sensor for Structural Health Monitoring Applications

A. El Kacimi [1], E. Pauliac-Vaujour [1], J. Eymery [2]
[1] University Grenoble Alpes, CEA, LETI, MINATEC Campus, Grenoble, France
[2] University Grenoble Alpes, CEA, Grenoble, France

We report on the modeling of flexible piezoelectric capacitive sensor based on GaN wires grown by Metal Organic Vapor Phase Epitaxy. Single crystal cone-shaped wires with hexagonal cross section are embedded within dielectric layers (parylene) in between two metal electrodes to achieve a capacitive structure. The device characteristics directly depend on growth conditions for example by tuning ...

Finite Element Simulation of a Surface Acoustic Wave Driven Linear Motor

B. Behera [1], H. B. Nemade [1], S. Trivedi [1],
[1] Indian Institute of Technology Guwahati, Guwahati, Assam, India

The paper presents finite element simulation of a surface acoustic wave (SAW) linear motor. The function of SAW linear motor depends on the principle of friction drive provided by SAW propagating on a piezoelectric substrate. The SAW motor comprises of a slider driven by Rayleigh wave generated on a piezoelectric stator using an interdigital transducer (IDT) fabricated on surface of the stator. ...

MEMS Based Sensor for Blood Group Investigation

M. Kaushik [1], S. Katti [1], V. Saradesai [1], P. Naragund [1], P. Vidhyashree [1], A. K. V. Nandi [1]
[1] B.V. Bhoomaraddi College of Engineering and Technology, Hubli, India

This article describes the design of MEMS based cantilever structure intended for determination of blood group and it is compared with manual method. Cantilever structure design has a sensing layer and when a blood sample comes in contact with this, results in coagulation. The surface tension in turn occurs due to chemical and biological reactions of antigen and antibodies resulting in ...

Modeling and Analysis of Thermal Bimorph using COMSOL Multiphysics®

Rachita Shettar[1], Dr. B G. Sheparamatti[1]
[1]Basaveshwar Engineering College, Bagalkot, Karanataka, India

In this paper modeling and simulation results of a thermal bimorph is capable of producing increased displacement for increasing temperatures are presented. Thermal bimorphs are popular actuation technology in MEMS (Micro-Electro-Mechanical Systems). Bimorph actuators consist of two materials with different coefficients of thermal expansion. The main objective of this work is to investigate the ...

Calculation of Surface Acoustic Waves on a Piezoelectric Substrate using Amazon™ Cloud Computing

U. Vogel [1], M. Spindler [1], S. Wege [1], T. Gemming [1]
[1] Leibniz Institute for Solid State and Materials, Dresden, Germany

In this work, we seek to simulate SAWs for a better understanding and to benchmark the currently available cloud computing possibilities of COMSOL Multiphysics® software. By using the MEMS module we demonstrate 3D models with reduced geometry to achieve principle information about the wavefield. For a benchmark, a high-speed workstation with limited memory (RAM) is compared to the most potent ...

Piezoelectric Vibration Energy Harvester Based on Thickness-Tapered Cantilever

S. Kundu [1], H. B. Nemade [1],
[1] Indian Institute of Technology Guwahati, Guwahati, Assam, India

The paper presents simulations of uniform thickness and thickness-tapered types of piezoelectric vibration energy harvesters using COMSOL Multiphysics software. The simulated vibration energy harvesters have bimorph cantilever structure with end mass. Tapering the thickness of the piezoelectric layer in bimorph towards the free end is found to improve the stress distribution in the beam and ...

MEMS Resonator for RF Applications

V. Harshey
Visvesvaraya National Institute of Technology
Maharashtra, India

Vibrating mechanical tank components, such as quartz crystals and surface acoustic wave (SAW) resonators with Q’s in the range of 10e3–10e6, are widely used to implement high-Q oscillators and band pass filters in the radio frequency (RF) and intermediate frequency (IF) stages of communication transceivers. This paper will discuss designing of resonator and effects of various parameter on the ...