Weak Transient Magnetic Fields Detecting in Thermomagnetic Effect Study of Polymer Material Deformations

2014 ◽  
Vol 687-691 ◽  
pp. 4228-4231
Author(s):  
Sheng Ming Chen ◽  
Ying She Luo ◽  
Jian Xin Su ◽  
Yong Zhong Zhang
Keyword(s):  
Multivariate Calibration ◽  
Three Dimensional ◽  
Effect Study ◽  
Calibration Technique ◽  
Thermomagnetic Effect ◽  
Magnetic Detector ◽  
Hall Sensors ◽  
Compact Design ◽  
Transient Magnetic Fields ◽  
Pixel Matrix

A self-developed magnetic detector is presented, which is made up with 64 Hall sensors assembled as an 8×8 serried array in a 50×50mm quadrate circuit wafer, to catch a weak transient magnetic field. The disadvantage accompanying with compact design is the sharp rise of sensor’s working temperature due to the power consumed is on increasing. An approach in which the 64 Hall elements are connected as a three dimensional magnetic-pixel matrix and are driven by dynamic power is presented. The homologous hardware correction illustrative diagram is provided, including its measuring principle and multivariate calibration technique. The experimental results indicated that the proposed method is a beneficial exploration for sensor power supply.

High-temperature three-dimensional GaN-based hall sensors for magnetic field detection

2020 ◽  
Vol 54 (7) ◽  
pp. 075003
Author(s):  
Huolin Huang ◽  
Hui Zhang ◽  
Yaqing Cao ◽  
Yanhong Liu ◽  
Kaiming Ma ◽  
...  
Keyword(s):  
Magnetic Field ◽  
High Temperature ◽  
Three Dimensional ◽  
Field Detection ◽  
Hall Sensors

Mechanical Effect Study of the Vehicle Braking on the Asphalt Pavement

2015 ◽  
Vol 744-746 ◽  
pp. 1266-1272
Author(s):  
Wei Dong Jin ◽  
Chun Yu Liang ◽  
Xue Kai Gao ◽  
Peng Zhang
Keyword(s):  
Shear Stress ◽  
Asphalt Pavement ◽  
Three Dimensional ◽  
Vertical Displacement ◽  
Effect Study ◽  
Mechanical Effect ◽  
Uniform Motion ◽  
Horizontal Shear ◽  
Three Dimensional Model ◽  
Element Analysis

This paper established a three-dimensional model of asphalt pavement by finite element analysis method, studied the effects of vehicle braking on the asphalt pavement, and analyzed the mechanical law of asphalt pavement through comparing the stress of pavement asphalt when the vehicle is in uniform motion or braking condition. The results show that the vertical stress, vertical displacement and horizontal shear stress of the asphalt pavement increase significantly while the vehicle is under the braking condition. In every asphalt pavement structure layer, the maximum horizontal shear stress under vehicle braking condition are all about four times to that of under vehicle uniform motion, so it’s necessary to significantly improve the shear strength of the asphalt pavement in these sections which often bear automobile braking force.

scholarly journals Design, Optimization and Analysis of Supersonic Radial Turbines

2019 ◽  
Author(s):  
Lukas Benjamin Inhestern ◽  
James Braun ◽  
Guillermo Paniagua ◽  
José Ramón Serrano Cruz
Keyword(s):  
High Performance ◽  
Ad Hoc ◽  
Three Dimensional ◽  
Critical Factor ◽  
Design Tool ◽  
Navier Stokes ◽  
Design Parameters ◽  
Design Variables ◽  
Compact Design ◽  
Radial Outflow

Abstract New compact engine architectures such as pressure gain combustion require ad-hoc turbomachinery to ensure an adequate range of operation with high performance. A critical factor for supersonic turbines is to ensure the starting of the flow passages, which limits the flow turning and airfoil thickness. Radial outflow turbines inherently increase the cross section along the flow path, which holds great potential for high turning of supersonic flow with a low stage number and guarantees a compact design. First the preliminary design space is described. Afterwards a differential evolution multi-objective optimization with 12 geometrical design parameters is deducted. With the design tool AutoBlade 10.1, 768 geometries were generated and hub, shroud, and blade camber line were designed by means of Bezier curves. Outlet radius, passage height, and axial location of the outlet were design variables as well. Structured meshes with around 3.7 million cells per passage were generated. Steady three dimensional Reynolds averaged Navier Stokes (RANS) simulations, enclosed by the k-omega SST turbulence model were solved by the commercial solver CFD++. The geometry was optimized towards low entropy and high power output. To prove the functionality of the new turbine concept and optimization, a full wheel unsteady RANS simulation of the optimized geometry exposed to a nozzled rotating detonation combustor (RDC) has been performed and the advantageous flow patterns of the optimization were also observed during transient operation.

scholarly journals A Compact Spatial Free-Positioning Wireless Charging System for Consumer Electronics Using a Three-Dimensional Transmitting Coil

Energies ◽  
2019 ◽  
Vol 12 (8) ◽  
pp. 1409 ◽  
Author(s):  
Ziwei Liang ◽  
Jianqiang Wang ◽  
Yiming Zhang ◽  
Jiuchun Jiang ◽  
Zhengchao Yan ◽  
...  
Keyword(s):  
Three Dimensional ◽  
Load Condition ◽  
Consumer Electronics ◽  
Constant Current ◽  
Receiver Design ◽  
Wireless Charging ◽  
Compensation Circuit ◽  
Current Output ◽  
Charging System ◽  
Compact Design

A compact spatial free-positioning wireless charging system with a novel three-dimensional (3D) transmitting (Tx) coil is proposed to charge consumer electronics in the working area. Because of the strengthened electromagnetic field generated by the proposed 3D Tx coil in the space, this system can charge consumer electronics wirelessly with great tolerance to positional and angular misalignments between the transmitter and receiver. Benefiting from the compact design of the 3D Tx coil, the system can be easily embedded in some corners of office furniture/cubic panels, which will not cause any extra working space consumption when charging devices. The inductor-capacitor-capacitor (LCC) compensation circuit on the Tx side can achieve constant current output, which is independent of load condition and can protect the transmitter. With the LCC compensation circuit, the MOSFETs of the H-bridge high-frequency inverter realized zero voltage switching (ZVS). The small-sized planar receiving (Rx) coil and series (S) compensation circuit is applied to achieve compact receiver design. The theoretical and experimental results show that the spatial free-positioning wireless charging prototype can transfer 5 W to the small-sized receiver in around 350 mm × 225 mm × 200 mm 3D charging area and achieve the highest efficiency of 77.9%.

Sign in / Sign up

Export Citation Format

Share Document