scholarly journals Tuning capacitance wire-mesh sensor gains for measurement of conductive fluids

2021 ◽  
Vol 88 (s1) ◽  
pp. s107-s113
Author(s):  
Felipe d. A. Dias ◽  
Philipp Wiedemann ◽  
Marco J. da Silva ◽  
Eckhard Schleicher ◽  
Uwe Hampel
Keyword(s):  
Electrical Conductivity ◽  
Cross Talk ◽  
Tap Water ◽  
Conductivity Measurement ◽  
Wire Mesh ◽  
Energy Losses ◽  
Flow Parameters ◽  
Front End ◽  
Multiphase Fluids ◽  
First Time

Abstract In this paper, the front-end circuit of a capacitance wire-mesh sensor (WMS) is analyzed in detail and a new methodology to tune its feedback gains is reported. This allows, for the first time, a capacitance WMS to be able to provide linear measurements of multiphase fluids with electrical conductivity greater than 100 𝜇S/cm, which is particularly important for tap water, where the conductivity is typically in between 100 S/cm and 500 𝜇S/cm. Experimental and numerical results show that the selected gains using the proposed methodology contribute to suppress cross-talk and energy losses, which in turn, reduces considerably the deviation of the conductivity measurement and the estimation of derived flow parameters, such as local and average phase fraction.

scholarly journals Electrical Conductivity Measurement on Metallic Materials With a Cylindrical Resonator

2021 ◽  
pp. 1-9
Author(s):  
Yunfeng Dong ◽  
Morten Stendahl Jellesen ◽  
Rune Juul Christiansen ◽  
Jesper Hovelskov ◽  
Jorgen Sundgren ◽  
...  
Keyword(s):  
Electrical Conductivity ◽  
Conductivity Measurement ◽  
Metallic Materials ◽  
Electrical Conductivity Measurement ◽  
Cylindrical Resonator

Electrical Properties of Y0.06Sr0.94Ti0.6Fe0.4O3-δ-YSZ Composites as Electrode Materials

2016 ◽  
Vol 697 ◽  
pp. 327-330 ◽  
Author(s):  
Ke Shan ◽  
Xing Min Guo ◽  
Feng Rui Zhai ◽  
Zhong Zhou Yi
Keyword(s):  
Electrical Conductivity ◽  
Electrode Materials ◽  
Electronic Conductivity ◽  
Ionic Conductivities ◽  
Conductivity Measurement ◽  
Transference Numbers ◽  
Secondary Phases ◽  
Electrical Conductivity Measurement ◽  
Total Electrical Conductivity ◽  
Phase Compatibility

Y0.06Sr0.94Ti0.6Fe0.4O3-δ-YSZ composites were prepared by mixing Y, Fe co-doped SrTiO3 (Y0.06Sr0.94Ti0.6Fe0.4O3-δ known as YSTF) and 8 mol% Y2O3 stabilized ZrO2 (YSZ) in different weight fractions. The phase stability, phase compatibility, microstructure and mixed ionic-electronic conductivity of composites were investigated. Phase analysis by XRD showed no clearly detectable secondary phases. The electrical conductivity measurement on the YSTF-YSZ composites showed a drastic decrease in total electrical and ionic conductivities when more than 10 wt% of YSZ was used in the composites. The total electrical conductivity was 0.102 S/cm for Y0.06Sr0.94Ti0.6Fe0.4O3-δ and 0.043 S/cm for YSTF-20YSZ at 700 oC, respectively. The value at 700 oC is approximately 2.4 times higher than that of YSTF-20YSZ. The ionic conductivity of Y0.06Sr0.94Ti0.8Fe0.2O3-δ varies from 0.015S/cm at 700 oC to 0.02 S/cm at 800 oC, respectively. The value at 800°C is approximately 12.5 times higher than YSTF-20YSZ. The ion transference numbers of YSTF-YSZ composites vary from 0.14 to 0.28 at 800 °C.

An Expert Software for Multi-Layer Coatings Design in Surface Engineering

2008 ◽  
Vol 595-598 ◽  
pp. 583-591 ◽  
Author(s):  
Céline Bondoux ◽  
Christophe Degrandcourt ◽  
George Ailinca ◽  
Pierre D'Ans ◽  
Marc Degrez ◽  
...  
Keyword(s):  
Electrical Conductivity ◽  
Expert System ◽  
Surface Engineering ◽  
Corrosion And Wear ◽  
Surface Finishing ◽  
Future Developments ◽  
First Time ◽  
Layer Coating ◽  
Main Operation

For the first time, a unique expert system able to give assistance to designers in surface engineering has been built. Not only is this software able to provide multi-layer coating solutions, but it is also able to rank different solutions according to their technico-economical interest. In addition to its ability to solve corrosion and wear concerns, it is also able to deal with surface finishing properties (like brightness, weldability, electrical conductivity, biocompatibility, …). This paper describes the structure of this expert system together with its main operation principles and future developments.

scholarly journals Noninvasive electrical conductivity measurement by MRI: a test of its validity and the electrical conductivity characteristics of glioma

2017 ◽  
Vol 28 (1) ◽  
pp. 348-355 ◽  
Author(s):  
Khin Khin Tha ◽  
Ulrich Katscher ◽  
Shigeru Yamaguchi ◽  
Christian Stehning ◽  
Shunsuke Terasaka ◽  
...  
Keyword(s):  
Electrical Conductivity ◽  
Conductivity Measurement ◽  
Electrical Conductivity Measurement

Electrical conductivity measurement on DKDP Crystals with different deuterated degrees

2012 ◽  
Vol 109 (1) ◽  
pp. 159-162 ◽  
Author(s):  
Baoan Liu ◽  
Xin Yin ◽  
Minglei Zhao ◽  
Qinghua Zhang ◽  
Mingxia Xu ◽  
...  
Keyword(s):  
Electrical Conductivity ◽  
Conductivity Measurement ◽  
Electrical Conductivity Measurement

Electrical conductivity measurement in studying physicochemical charges in conservation tubes

1987 ◽  
Vol 22 (6) ◽  
pp. 761-764 ◽  
Author(s):  
S. S. Nabatov ◽  
A. N. Dremin ◽  
S. O. Shubitidze ◽  
V. V. Yakushev
Keyword(s):  
Electrical Conductivity ◽  
Conductivity Measurement ◽  
Electrical Conductivity Measurement

scholarly journals Obtaining hollow semi-finished products from copper alloys for electrical applications by screw rolling method

2020 ◽  
pp. 27-38 ◽  
Author(s):  
Yu. V. Gamin ◽  
B. A. Romantsev ◽  
A. N. Pashkov ◽  
P. V. Patrin ◽  
I. A. Bystrov ◽  
...  
Keyword(s):  
Electrical Conductivity ◽  
Copper Alloys ◽  
Reduction Process ◽  
Point Of View ◽  
Wall Thickening ◽  
Relative Reduction ◽  
Outer Diameter ◽  
Screw Rolling ◽  
Front End ◽  
Rolling Method

The article proposes a process for obtaining semi-finished products in the form of pipes made of copper alloys for electrical applications using the screw rolling method. The paper presents the results of experimental piercing and rolling of pipe samples made of Cu–0.75Cr copper alloy billets with a diameter of 45 mm. The 43.5×10.0 mm samples obtained after piercing using a two-roll screw rolling mill had exact geometrical dimensions: outer diameter deviation at the front end was up to 1 %, at the back end – up to 2.4 %; relative variation in wall thickness at the front end was 0.3÷0.5 %, at the rear end – 0.5÷1.0 %. Then pierced pipe samples were rolled using a three-roll radial-shear rolling (RSR) mini mill with a different total degree of reduction – samples were obtained with an outer diameter of 30, 25 and 18 mm. The reduction process was analyzed from the point of view of internal hole stability and deformation. In case of 30 % relative reduction of the outer diameter, rolling without a mandrel is accompanied by wall thickening. In this case, inner diameter deviations are within acceptable limits. The experiments on obtaining samples from the Cu–0.75Cr alloy by screw piercing and reduction in the RSR mill show that this scheme can be implemented in principle in industry. At the same time it is necessary to define more exactly deformation parameters (degree of deformation, choice of reduction scheme) to obtain a quality product. Various options for heat treatment (HT) of the obtained pipe samples and the effect of the HT method on electrical conductivity and hardness are considered. Samples after piercing had a conductivity of 59.3 % IACS. The maximum electrical conductivity of 76.7 % IACS was obtained on samples after quenching from a temperature of 1020 °C and aging at 450 °C for 3 h. The results of the work show the fundamental possibility of obtaining semi-finished products from copper alloys for electrical purposes using the screw rolling method.

scholarly journals Анизотропия анионной проводимости в монокристаллах суперионного проводника CeF-=SUB=-3-=/SUB=-

2021 ◽  
Vol 63 (9) ◽  
pp. 1376
Author(s):  
Н.И. Сорокин ◽  
В.В. Гребенев ◽  
Д.Н. Каримов
Keyword(s):  
Electrical Conductivity ◽  
Atomic Structure ◽  
Unit Cell ◽  
Conductivity Measurements ◽  
Weak Anisotropy ◽  
Tysonite Structure ◽  
Maximum Value ◽  
Anisotropy Effect ◽  
First Time ◽  
Anionic Conductivity

The anisotropy of anionic conductivity in crystals of a superionic conductor CeF3 with the tysonite structure (sp. gr. P-3с1) has been studied for the first time. The conductivity measurements at temperatures from 300 K to 600 K were carried out along the principal a- and c-axes of trigonal unit cell of the crystal. The maximum value of electrical conductivity is observed along the c-axis. The superionic CeF3 crystals have the weak anisotropy of electrical conductivity equal to σ||c/σ||a = 2.4 and σ||c = 5.6 10–4 S/cm at 500 K. The anisotropy effect of anionic conductivity in individual fluorides with the tysonite structure is discussed in connection with the peculiarities of their atomic structure.

scholarly journals Electrical conductivity measurement of fayalite under shock compression up to 56 GPa

1980 ◽  
Vol 85 (B4) ◽  
pp. 1876 ◽  
Author(s):  
Tsutomu Mashimo ◽  
Ken-Ichi Kondo ◽  
Akira Sawaoka ◽  
Yasuhiko Syono ◽  
Humihiko Takei ◽  
...  
Keyword(s):  
Electrical Conductivity ◽  
Shock Compression ◽  
Conductivity Measurement ◽  
Electrical Conductivity Measurement
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