International Journal of Applied Electromagnetics and Mechanics - Volume 52, issue 3-4

Authors: Nakamoto, Hiroyuki | Ootaka, Hideo | Hirata, Ichiro | Kobayashi, Futoshi | Kojima, Fumio

Article Type: Research Article

Abstract: We propose a stretchable strain sensor for measurement of distributed strain. The strain sensor is composed of elastic sheets. The elastic modulus of the strain sensor is low. Hence, the strain sensor pasted on human skin or clothes is able to stretch along their shape and stretch. The principle of the strain measurement is a capacitive change based on stretching. In this paper, a distributed strain sensor is proposed. A design of measurement circuit also is described. Experimental results reveal the characteristics of the distributed strain sensor and the effectiveness of the measurement circuit.

Keywords: Strain sensor, distributed strain, flexible sensor, stretchable sensor

DOI: 10.3233/JAE-162126

Citation: International Journal of Applied Electromagnetics and Mechanics, vol. 52, no. 3-4, pp. 1681-1688, 2016

Authors: Hong, Do-Kwan | Joo, Dae-Suk | Lee, Ji-Young | Woo, Byung-Chul

Article Type: Research Article

Abstract: The integrated motor propulsor (IMP) is a new unmanned underwater vehicle (UUV) propulsion apparatus. The IMP consists of a rim-driven motor, a fluid hydrodynamic bearing, and a propulsor. KERI (Korea Electrotechnology Research Institute) is developing a surface permanent magnet (SPM) type of synchronous motor and a PWM-driven inverter. This system operates at a power density of 50HP (37 kW) at 1,000 rpm and is intended to fit the IMP system. The optimum design of the PMSM for the IMP has been developed successfully considering the pole-slot combination, electric performance, and the noise and vibration characteristics using multi-physics analyses and statistical …design of experiments (DOE). A back-to-back performance test rig was proposed and considered for operation in a water tank. The acoustic field in a water tank of an optimum model was compared with that in an air condition considering the FSI (fluid structure interaction) dynamics. Show more

Keywords: Integrated motor propulsor (IMP), unmanned underwater vehicle (UUV), multi-physics analysis, design of experiments (DOE), coupled, analysis, magnetic-forced vibration-acoustic analysis, response surface, methodology (RSM)

DOI: 10.3233/JAE-162162

Citation: International Journal of Applied Electromagnetics and Mechanics, vol. 52, no. 3-4, pp. 1689-1695, 2016

Authors: Faktorová, Dagmar | Luptáková, Eva

Article Type: Research Article

Abstract: The article is directed on detection of changes of blood phantom permittivity, which can begin by insertion of substances defining a diseased condition in living organism. It is based on assumption that the structure of the blood phantom is possible to specify analytically more exactly than the structure of blood with more difficulty controllable ingredients in living organism. For that purpose blood phantoms were created ant their permittivity were compared with the permittivity of living organism blood. For that purpose microwave frequencies which are suitable to interact selectively with dielectric substances differing with content of different ingredients on the used …microwave signal. Application methods were adopted in accordance with the kind of the material and the manner of microwave frequencies application. The evaluation methods of the measured values were also used with regard to these values. Show more

Keywords: Permittivity, blood, blood phantom, microwave frequencies, transmission method, reflection method

DOI: 10.3233/JAE-162179

Citation: International Journal of Applied Electromagnetics and Mechanics, vol. 52, no. 3-4, pp. 1697-1702, 2016

Article Type: Research Article

Citation: International Journal of Applied Electromagnetics and Mechanics, vol. 52, no. 3-4, pp. 1703-1727, 2016