scholarly journals SAR and thermal response effects of a two-arm Archimedean spiral coil in a magnetic induction sensor on a human head

2015 ◽  
Vol 26 (s1) ◽  
pp. S405-S412
Author(s):  
Ziyi Zhang ◽  
Peiguo Liu ◽  
Dongming Zhou ◽  
Liang Zhang ◽  
Liang Ding
Keyword(s):  
Magnetic Induction ◽  
Thermal Response ◽  
Human Head ◽  
Archimedean Spiral ◽  
Spiral Coil ◽  
Induction Sensor

scholarly journals Stretchable Electrode Breakthrough: Archimedean Spiral Coil Lithium Anode

Joule ◽  
2018 ◽  
Vol 2 (9) ◽  
pp. 1654-1656 ◽  
Author(s):  
Yue Yu ◽  
Yunhai Zhu ◽  
Xinbo Zhang
Keyword(s):  
Archimedean Spiral ◽  
Spiral Coil ◽  
Lithium Anode ◽  
Stretchable Electrode

scholarly journals The MAIN Shirt: A Textile-Integrated Magnetic Induction Sensor Array

Sensors ◽  
2014 ◽  
Vol 14 (1) ◽  
pp. 1039-1056 ◽  
Author(s):  
Daniel Teichmann ◽  
Andreas Kuhn ◽  
Steffen Leonhardt ◽  
Marian Walter
Keyword(s):  
Magnetic Induction ◽  
Sensor Array ◽  
Induction Sensor

scholarly journals Self-Inductance Calculation of the Archimedean Spiral Coil

Energies ◽  
2021 ◽  
Vol 15 (1) ◽  
pp. 253
Author(s):  
Iftikhar Hussain ◽  
Dong-Kyun Woo
Keyword(s):  
Integral Formula ◽  
Outer Radius ◽  
Wire Diameter ◽  
The Self ◽  
Experimental Result ◽  
Geometrical Parameters ◽  
Archimedean Spiral ◽  
Spiral Coil ◽  
Measurement Results ◽  
Calculation Results

In this paper, a new method to calculate the self-inductance of the Archimedean spiral coil is presented. The proposed method is derived by solving Neumann’s integral formula, and the numerical tool is used to calculate the inductance value. The calculation results are verified with several conventional formulas derived from the Wheeler formula or its modified form and 3D finite element analyses. The comparison with simulation results shows that the conventional formula has an error of above 40% compared to the proposed method, which has below 7% when the wire diameter is reduced. To further check the validity, different sizes of the spiral coil are fabricated by changing the geometrical parameters such as the number of turns, turn spacing, inner radius, outer radius, and wire diameter. Litz wire is chosen for making the spiral coil, and bobbins are made using a 3D printer. Finally, the calculation results are compared with the experimental result. The error between them is less than 2%. The comparison with the conventional formulas, simulation, and measurement results shows the accuracy of the proposed method. This method can be used to calculate the self-inductance of wireless power coils, inductors and antenna design.

scholarly journals A Miniaturized Magnetic Induction Sensor Using Geomagnetism for Turn Count of Small-Caliber Ammunition

Sensors ◽  
2006 ◽  
Vol 6 (7) ◽  
pp. 712-726 ◽  
Author(s):  
Sang-Hee Yoon ◽  
Seok-Woo Lee ◽  
Young-Ho Lee ◽  
Jong-Soo Oh
Keyword(s):  
Magnetic Induction ◽  
Induction Sensor

scholarly journals EXPERIMENTAL INVESTIGATION OF THE CONVECTIVE HEAT TRANSFER IN A SPIRALLY COILED CORRUGATED TUBE WITH RADIANT HEATING

2017 ◽  
Vol 15 (3) ◽  
pp. 495 ◽  
Author(s):  
Milan Đorđević ◽  
Velimir Stefanović ◽  
Mića Vukić ◽  
Marko Mančić
Keyword(s):  
Heat Transfer ◽  
Radiation Field ◽  
Design Solution ◽  
Laboratory Model ◽  
Fluid Temperature ◽  
Radiant Heating ◽  
Archimedean Spiral ◽  
Spiral Coil ◽  
Corrugated Tube ◽  
Heat Absorber

The Archimedean spiral coil made of a transversely corrugated tube was exposed to radiant heating in order to represent a heat absorber of the parabolic dish solar concentrator. The main advantage of the considered innovative design solution is a coupling effect of the two passive methods for heat transfer enhancement - coiling of the flow channel and changes in surface roughness. The curvature ratio of the spiral coil varies from 0.029 to 0.234, while water and a mixture of propylene glycol and water are used as heat transfer fluids. The unique focus of this study is on specific boundary conditions since the heat flux upon the tube external surfaces varies not only in the circumferential direction, but in the axial direction as well. Instrumentation of the laboratory model of the heat absorber mounted in the radiation field includes measurement of inlet fluid flow rate, pressure drop, inlet and outlet fluid temperature and 35 type K thermocouples welded to the coil surface. A thermal analysis of the experimentally obtained data implies taking into consideration the externally applied radiation field, convective and radiative heat losses, conduction through the tube wall and convection to the internal fluid. The experimental results have shown significant enhancement of the heat transfer rate compared to spirally coiled smooth tubes, up to 240% in the turbulent flow regime.

Investigation of Hybrid Locomotive Robot for Anti-Personnel Mine Detection

2020 ◽  
Vol 12 (1) ◽  
Author(s):  
S. Venkatesh ◽  
J. Dhanasekar ◽  
Vasanth Swaminathan
Keyword(s):  
Obstacle Avoidance ◽  
Magnetic Induction ◽  
Ground Surface ◽  
Landmine Detection ◽  
Mine Detection ◽  
Lead Screw ◽  
Screw Mechanism ◽  
Electro Magnetic ◽  
Hybrid Locomotion ◽  
Induction Sensor

Most of landmine detection robots proposed so far have been strongly restricted from locomotion inside the mine field because they cannot cross over the mine. So we have proposed a mine detection robot with hybrid locomotion, which can enter inside the minefield with low ground surface contact, which can cross over the mine instead of changing its path and scan landmines directly using Electro Magnetic Induction sensor. The hybrid locomotion proposed in the robot uses the frame walking technique and the conventional wheeled locomotion. The robot switches over the locomotion mechanism from wheeled to leg when mine is detected and vice versa with a lead screw mechanism. The leg locomotion is achieved by frame walking technique where the two frames translate with the help of lead screw mechanism. A purpose of adopting this combination is to evade anti-personnel landmines which are relatively smaller in comparison to their anti-tank landmine counterparts. The robot initially starts in wheeled mode and upon detection of metal, pulls in the frame walking algorithm. The robot also deploys an obstacle avoidance algorithm when working in wheel mode.

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