Effectiveness of rotatable sensor to improve image accuracy of ECT system

Liu, Zhijian; Babout, Laurent; Banasiak, Robert; Sankowski, Dominik

doi:10.1016/j.flowmeasinst.2010.03.005

Cited by 15 publications

(9 citation statements)

References 14 publications

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“…According to the study in [21,22] a is generally selected within the range of 0.001-0.2 to minimize data error caused by physical noise.…”

Section: Tikhonov Regularizationmentioning

confidence: 99%

“…In this study, parameter l k is chosen as a constant 0.1 by numerical tests for decreasing data noise error [22]. Stopping rules of Landweber iteration also satisfies Eq.…”

Section: Landweber Iterationmentioning

confidence: 99%

“…The OIOR algorithm is derived from the Landweber iteration, and contains an offline and an online step, respectively [22]. In the offline step, the inverse sensitivity map is optimized based on the steepest gradient descent method, while in the online step, the capacitance distribution is solved by a linear estimation procedure, expressed as:…”

Section: Offline Iteration Online Reconstruction (Oior)mentioning

confidence: 99%

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An integrative approach to spatial mapping of pressure distribution in microrolling

Zou

Fan

Gao

et al. 2015

CIRP Journal of Manufacturing Science and Technology

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“…According to the study in [21,22] a is generally selected within the range of 0.001-0.2 to minimize data error caused by physical noise.…”

Section: Tikhonov Regularizationmentioning

confidence: 99%

“…In this study, parameter l k is chosen as a constant 0.1 by numerical tests for decreasing data noise error [22]. Stopping rules of Landweber iteration also satisfies Eq.…”

Section: Landweber Iterationmentioning

confidence: 99%

Section: Offline Iteration Online Reconstruction (Oior)mentioning

confidence: 99%

See 1 more Smart Citation

An integrative approach to spatial mapping of pressure distribution in microrolling

Zou

Fan

Gao

et al. 2015

CIRP Journal of Manufacturing Science and Technology

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“…Moreover, the spatial electrostatic field distribution is neglected. Therefore, the ECT monitoring was developed in the direction of other data processing methods like cross-correlation [103,84,87,31], image processing and analysis, multi-layered tomography [100,55,154,45] or even rotatable sensor [86] etc. Nevertheless, independently of the mentioned extensions still the classic 2D ECT measurement suffers from the limitations of the cross-sectional approximation.…”

Section: Electrical Tomographymentioning

confidence: 99%

Computer methods for non-invasive measurement and control of two-phase flows: a review study

Wajman

2019

ITC

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Nowadays, the application of advanced technologies in modern production systems is the main trend of development and technological progress in many industrial sectors. It is due to the still growing trends of energy-saving and production quality enhancement. Wherever in the production process the phase mixture is transported and it is not optimal or not economic, there is a need to develop a system which would be able to prevent any construction disaster, unexpected production line stopping or situation where for reasons of bad flow parameters, the final product is defective. This paper studies various sensors, measurement techniques and computer methods for signal processing and analysis to diagnose and control two-phase flows. Due to the possibility that the invasive measurement disturbs the process and changes it parameters and behavior especially in the location just after the measurement point and simultaneously does not provide any information about these changes it is unreliable for the diagnosis or control. Therefore, the non-invasive techniques commonly used for measurement of flows parameters are described. Depending on the industrial demands many of applications examples for non-invasive two-phase flows measurement and monitoring are given. This description for identifying the flow parameters is divided into features categories of this phenomena as void fraction distribution, velocity profile and flow regime. However, from these methods the high accuracy and short processing time is expected. The continued observation and monitoring of the process abnormalities can provide valuable information about its dynamic state and allow for real-time and automatic monitoring and control. Therefore, the development of advanced process control is one of the most important challenges to keep the flow regime on the given level and for instant and long-term energy saving, quality improvement.

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“…In the case of capacitance tomography, a similar method was proposed earlier by Frounchi and Bazzazi [ 12 ], but the sensor only considered four electrodes and simulation results. Later, Liu et al [ 13 ] extended the approach to account for 16 electrodes. Their results showed, that this electrode configuration with the shortest rotation time for three intermediate steps, which is used to cover the angle between two adjacent electrodes, results in the highest image accuracy.…”

Section: Introductionmentioning

confidence: 99%

On the Use of a Rotatable ECT Sensor to Investigate Dense Phase Flow: A Feasibility Study

Wajman

Banasiak

Babout

2020

Sensors

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This paper presents the feasibility study of dynamic flow measurements using the concept of a rotatable electrical capacitance tomography (ECT) sensor. The experiment considered horizontal flow in a pneumatic conveying flow loop in the case of dense phase flow. Slugs and settled layers were imaged and a comparison was made between no rotation or rotation of the sensor for two image reconstruction schemas: linear back projection (LBP) and non-linear iterative back projection. Data were evaluated both qualitatively and quantitatively by estimating the solids concentration level for different hue levels.

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Effectiveness of rotatable sensor to improve image accuracy of ECT system

Cited by 15 publications

References 14 publications

An integrative approach to spatial mapping of pressure distribution in microrolling

An integrative approach to spatial mapping of pressure distribution in microrolling

Computer methods for non-invasive measurement and control of two-phase flows: a review study

On the Use of a Rotatable ECT Sensor to Investigate Dense Phase Flow: A Feasibility Study

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