Characterization of slug flows in horizontal piping by signal analysis from a capacitive probe

2010 ◽  
Vol 21 (3) ◽  
pp. 347-355 ◽  
Author(s):  
Emerson dos Reis ◽  
Leonardo Goldstein Jr.
Keyword(s):  
Signal Analysis ◽  
Capacitive Probe ◽  
Slug Flows

scholarly journals Signal analysis and characterization of a micro-electro-mechanical oscillator for the study of quantum fluids

2014 ◽  
Vol 568 (3) ◽  
pp. 032003 ◽  
Author(s):  
C S Barquist ◽  
J Bauer ◽  
T Edmonds ◽  
P Zheng ◽  
W G Jiang ◽  
...  
Keyword(s):  
Signal Analysis ◽  
Quantum Fluids ◽  
Mechanical Oscillator

Signal analysis and characterization of experimental setup for the transient thermoreflectance technique

2006 ◽  
Vol 77 (8) ◽  
pp. 084901 ◽  
Author(s):  
Robert J. Stevens ◽  
Andrew N. Smith ◽  
Pamela M. Norris
Keyword(s):  
Signal Analysis ◽  
Experimental Setup

scholarly journals Crill: A novel technique to characterize nano-ligno-cellulose

2014 ◽  
Vol 29 (2) ◽  
pp. 190-194 ◽  
Author(s):  
Sinke H. Osong ◽  
Sven Norgren ◽  
Per Engstrand ◽  
Mathias Lundberg ◽  
Peter Hansen
Keyword(s):  
Measurement Technique ◽  
Signal Analysis ◽  
Uv Light ◽  
Optical Response ◽  
Mechanical Pulp ◽  
Novel Technique ◽  
Analogue Signal ◽  
Homogenization Time

Abstract The CrillEye is a technique for qualitatively assessing loose slender and fibrillar particles created during pulping. It has also been demonstrated that the crill measurement technique can easily be used to measure the degree of fibrillation of mechanical pulp based nano-ligno-cellulose (NLC). The measurement technique is based on an optical response of a suspension at two wavelengths of light; UV and IR. The UV light contains information on both fibres and crill, while IR only contains information on fibres. The resolution on the CrillEye module is based on optical response of the pulp and on an analogue signal analysis making it concentration independent. Characterization of particlesize distribution of nano-ligno-cellulose is both important and challenging. The objective of the work presented in this paper was to study the crill values of TMP and CTMP based nano-ligno-celluloses as a function of homogenization time. Results showed that the crill value of both TMP-NLC and CTMP-NLC correlated fairly well with the homogenization time.

Inner Hole Diameter Measuring Based on Capacitive Sensor

2013 ◽  
Vol 739 ◽  
pp. 596-601
Author(s):  
Xuan Sun ◽  
Yu Zhen Ma ◽  
Yong Xin Yu ◽  
Yi Zhong Zheng
Keyword(s):  
Signal Analysis ◽  
Capacitive Sensor ◽  
Hole Diameter ◽  
Measuring System ◽  
Structure Characteristic ◽  
Guard Ring ◽  
Diameter Measurement ◽  
Capacitive Probe ◽  
And Control ◽  
Distance Change

nner hole diameter measuring system based on capacitive sensor was introduced in this paper, the structure characteristic of coaxial cylindrical capacitive probe in measuring inner hole diameter was analyzed;aiming at the signal analysis and control for the whole measurement system, the equipotential guard ring technique was adopted to eliminate edge effect caused for the sensors effective measuring polar plate, the transform circuit with operational amplifier was adopted to overcome the nonlinear defects resulted from polar distance change, the driving cables technique was used to reduce the influence of parasitic capacitance;and then we realize the precision diameter measurement in holes any depth.

Signal analysis and weighted polynomial approximation

2006 ◽  
Vol 43 (2) ◽  
pp. 159-169
Author(s):  
Nguyen Xuan Ky
Keyword(s):  
Signal Analysis ◽  
Hermite Polynomials ◽  
Type Theorem ◽  
Hermite Functions ◽  
Bernstein Type ◽  
Time Frequency ◽  
Window Functions ◽  
Bernstein Type Theorem ◽  
Frequency Window

We present applications of Hermite polynomials in signal analysis. Among other result, we give a characterization of the so-called time-frequency window functions in terms of the Hermite--Fourier coefficients, a Bernstein-type theorem for the best approximations of window functions by Hermite-functions, time-frequency approximations. Some analogues for Hankel-transforms will also be considered.

scholarly journals Multiphase alternated slug flows: Conditions to avoid coalescence and characterization of mass transfer between droplets

2021 ◽  
Vol 407 ◽  
pp. 127215
Author(s):  
Camille Méhault ◽  
Laurent Vanoye ◽  
Régis Philippe ◽  
Claude de Bellefon
Keyword(s):  
Mass Transfer ◽  
Slug Flows

Theory of capacitive probe method for noncontact characterization of dielectric properties of materials

1991 ◽  
Vol 6 (3) ◽  
pp. 629-638 ◽  
Author(s):  
V.K. Tewary ◽  
P.R. Heyliger ◽  
A.V. Clark
Keyword(s):  
Experimental Data ◽  
Potential Distribution ◽  
Dielectric Material ◽  
Dielectric Materials ◽  
Probe Method ◽  
Capacitive Probe ◽  
Properties Of Materials ◽  
Element Technique ◽  
The Hilbert Transform

The capacitive probe method for noncontact characterization and monitoring of dielectric materials is analyzed theoretically. An analytical method based upon the Hilbert transform technique and a numerical method using the finite element technique for calculating the potential distribution and change in admittance of the probe caused by presence of the dielectric material as a function of liftoff (distance between the probe plane and the surface of the dielectric material) are described. The two methods are compared with each other and their relative advantages discussed. The possibility of extracting useful information about the dielectric constant of the material from experimental data is also discussed in the light of the proposed theory.

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