Modelling and analysis of electrically conducting vessels and pipelines in electrical resistance process tomography

1995 ◽  
Vol 142 (4) ◽  
pp. 313-322 ◽  
Author(s):  
M. Wang ◽  
F.J. Dickin ◽  
R.A. Williams
Keyword(s):  
Electrical Resistance ◽  
Electrically Conducting ◽  
Process Tomography

Research on Excitation & Measurement Strategy of Tuber Electrical Resistance Tomography System

2014 ◽  
Vol 577 ◽  
pp. 701-704 ◽  
Author(s):  
Xiang Deng ◽  
Zhao Dong ◽  
Lu Chen ◽  
Hao Liu
Keyword(s):  
Electrical Resistance ◽  
Research Field ◽  
Soil Environment ◽  
Electrical Resistance Tomography ◽  
Tomography System ◽  
Measurement Strategy ◽  
Process Tomography ◽  
New Varieties ◽  
New Research ◽  
The Relationship

The non-invasion electrical process tomography of plant tuber or root is a new research field in the accurate cultivation of plants. Tuber Electrical Resistance Tomography (TERT) is aimed to extend the application of the technology into agriculture, which can help improving and breeding new varieties of the crops. This paper mainly studies excitation & measurement strategy. Especially the influences on distribution of sensitive field brought by the width and numbers of the array electrodes in the soil environment are analyzed. Besides, the relationship between the electrical conductivity and the measured boundary voltages is also discussed.

Stretchable conductors: thin gold films on silicone elastomer

2003 ◽  
Vol 795 ◽  
Author(s):  
Stéphanie P. Lacour ◽  
Sigurd Wagner ◽  
Z. Suo
Keyword(s):  
Electrical Resistance ◽  
Tensile Strain ◽  
Scale Structure ◽  
Gold Layer ◽  
Silicone Elastomer ◽  
Gold Films ◽  
Electrically Conducting ◽  
Electrical Interconnects ◽  
Stretchable Conductors ◽  
Micrometer Scale

ABSTRACTThin stripes of gold deposited onto elastomeric substrates can be stretched reversibly by more than 20 % while remaining electrically conducting. We are developing such stripes to serve as electrical interconnects on stretchable electronic skins. The gold layers are 25-nm to 500-nm thick. We observe two different film morphologies: the stripe is either buckled and continuous, or flat and contains micrometer-long cracks. Stretchability is correlated with the thickness and initial topography of the gold layer. Stripes thicker than 100-nm fail electrically at tensile strain of ∼ 1 %, while thinner stripes remain conducting up to much larger strain. Upon stretching the buckled stripes flatten and break into islands of 1 to 100 micrometers on a side, while the initially microcracked stripes retain their micrometer scale structure. The electrical resistance of the buckled stripes is the lowest but the micro-textured stripes can be stretched more.

Changes of Electrical Resistance of Rubbers Loaded with Carbon Black

1957 ◽  
Vol 30 (2) ◽  
pp. 572-583
Author(s):  
D. G. Marshall
Keyword(s):  
Experimental Investigation ◽  
Carbon Black ◽  
Natural Rubber ◽  
Electrical Resistance ◽  
Current Flow ◽  
Electrical Contact ◽  
Butyl Rubber ◽  
Initial Increase ◽  
Electrically Conducting ◽  
Conducting Rubber

Abstract Many workers have studied the changes in resistivity that occur on deforming rubbers loaded with carbon black. This paper describes three types of experimental investigation that do not seem to have received detailed study previously, and also a theory that explains the results qualitatively in terms of variations of contact resistances between carbon black particles. Firstly, the changes of resistance of vulcanized natural rubber, Butyl rubber, Neoprene, and Thiokol FA loaded with carbon black have been studied during cyclic deformations. Secondly, the initial increase of resistance during stretching testpieces of vulcanized natural rubber containing several loadings of different carbon blacks has been investigated. Finally, the changes of resistance with time that occur after stretching and releasing samples of electrically conducting rubber have been studied. The ingredients and preparation of the compounds used in experiments discussed in this paper are listed in the Appendix. The testpieces used in the following experiments were approximately 0.7 cm. wide, 0.1 cm. thick, and 7.0 cm. long. Electrical contact was established by means of brass strips bonded by molding into the ends of the samples, so that the direction of current flow was along the length of the pieces, and in the same direction as the extensions.

scholarly journals Influence of Dry Cleaning on the Electrical Resistance of Screen Printed Conductors on Textiles

2016 ◽  
Vol 16 (3) ◽  
pp. 146-153 ◽  
Author(s):  
Ilda Kazani ◽  
Gilbert De Mey ◽  
R. Klepacko ◽  
Carla Hertleer ◽  
Genti Guxho ◽  
...  
Keyword(s):  
Numerical Simulation ◽  
Electrical Conductivity ◽  
Theoretical Model ◽  
Numerical Analysis ◽  
Electrical Resistance ◽  
Mechanical Treatment ◽  
Conducting Layer ◽  
Dry Cleaning ◽  
Electrically Conducting ◽  
Screen Printed

Abstract Electrically conducting inks were screen printed on various textile substrates. The samples were dry cleaned with the usual chemicals in order to investigate the influence of the mechanical treatment on the electrical conductivity. It was found that dry cleaning has a tremendous influence on this electrical conductivity. For several samples, it is observed that the electrical resistance increases with the square of the number of dry cleaning cycles. In order to explain this observation a theoretical model and a numerical simulation have been carried out, by assuming that dry cleaning cycles introduce a crack in the conducting layer. The theoretical analysis and the numerical analysis both confirmed the experimental observations.

ELASTOMERIC INTERCONNECTS

2006 ◽  
Vol 16 (01) ◽  
pp. 397-407 ◽  
Author(s):  
Stéphanie P. Lacour ◽  
Joyelle Jones ◽  
Sigurd Wagner ◽  
Teng Li ◽  
Z. Suo
Keyword(s):  
Thin Film ◽  
Amorphous Silicon ◽  
Electrical Resistance ◽  
Thin Film Transistors ◽  
Thin Film Transistor ◽  
Gold Films ◽  
Silicon Thin Film ◽  
Electrical Failure ◽  
Electrically Conducting ◽  
Silicone Membranes

Elastomeric interconnects made of patterned thin gold films on silicone membranes, can be reversibly bent, uniaxially or radially stretched while remaining electrically conducting. Such interconnects can be stretched to double their length, cycled 1,000 times without electrical failure. While the electrical resistance may increase threefold upon stretching, the resistance values still remain ~1,000 times below the typical input impedance of amorphous silicon thin film transistors. Therefore the stretchable gold films can function as interconnects for power and signal to a fully elastic thin film transistor inverter.

scholarly journals Beneficial effect of multi-wall carbon nanotubes on the graphitization of polyacrylonitrile (PAN) coating

2010 ◽  
Vol 4 (2) ◽  
pp. 59-62 ◽  
Author(s):  
Mária Darányi ◽  
Tamás Csesznok ◽  
István Sarusi ◽  
Ákos Kukovecz ◽  
Zoltán Kónya ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Beneficial Effect ◽  
Spin Coating ◽  
Electrical Resistance ◽  
Precursor Solution ◽  
Specific Electrical Resistance ◽  
Multi Wall Carbon Nanotubes ◽  
Electrically Conducting ◽  
N2 Atmosphere ◽  
Product Film

Polyacrylonitrile (PAN) solutions were deposited on quartz plates by spin coating to yield 2-3 ?m thick PAN films. The films were decomposed at 1000?C in N2 atmosphere into electrically conducting carbonaceous coatings. When the precursor solution contained cobalt (0.2 g Co-acetate per 1 g PAN) and/or multi-wall carbon nanotubes (MWCNTs, 2 mg MWCNT per 1 g PAN) the specific electrical resistance of the product film dropped from the original 492 ??cm-1 value down to 46 ??cm-1. By excluding all other possibilities we came to the conclusion that the beneficial effect of carbon nanotubes is related to their catalytic action in the final graphitization of condensed nitrogen-containing rings into graphitic nanocrystallites.

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