Electrical resistance tomography for process applications

Dickin, F.J.; Wang, Mi

doi:10.1088/0957-0233/7/3/005

Cited by 345 publications

(221 citation statements)

References 32 publications

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“…Alternative approaches include those analysing the transmission-attenuation response of laser light in sample based devices such as the Lumizier (from Lum GmbH) and Turbiscan (Formulation, SA) [9][10][11]; however, these ex situ systems are only suitable for small sample analysis of slowly evolving suspensions. In situ devises include light based transmission/backscatter or fluorescence devices [12][13][14][15][16][17][18], CCD video analysis [19][20][21][22][23], gamma ray [24,25] or x-ray CATSCAN [26], and also tomographic techniques which measure electrical resistance within suspensions [27,28]. However, a number of these techniques suffer from common limitations to their use, such complicated set-ups that encompass specific vessel requirements (and hence are not suitable for deployment industrially) while many are highly intrusive, or complex and expensive in application [29].…”

Section: Introductionmentioning

confidence: 99%

In situ characterisation of a concentrated colloidal titanium dioxide settling suspension and associated bed development: Application of an acoustic backscatter system

et al. 2015

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ReuseUnless indicated otherwise, fulltext items are protected by copyright with all rights reserved. The copyright exception in section 29 of the Copyright, Designs and Patents Act 1988 allows the making of a single copy solely for the purpose of non-commercial research or private study within the limits of fair dealing. The publisher or other rights-holder may allow further reproduction and re-use of this version -refer to the White Rose Research Online record for this item. Where records identify the publisher as the copyright holder, users can verify any specific terms of use on the publisher's website. TakedownIf you consider content in White Rose Research Online to be in breach of UK law, please notify us by emailing eprints@whiterose.ac.uk including the URL of the record and the reason for the withdrawal request. eait.dean@uq.edu.au (S.Biggs). T.N.Hunter@leeds.ac.uk (T.N. Hunter).1 Present address: University of Queensland, Brisbane, Qld 4072, Australia 2 AbstractThe ability to accurately characterise the settling of particulate suspensions is imperative in numerous industries for improved processing, optimisation and control. Characterisation is typically a non-trivial process, and in situ measurements that remove the restriction of requiring particular sample sizes are preferred. Here for the first time, we explore the use of an acoustic backscatter system (ABS) to characterise key settling dynamics within a common colloidal mineral suspension, where backscatter attenuation is heightened due to the associated low scattering cross sections of the particles. Settling titanium dioxide dispersions with concentrations ranging 0.05 -3.00 vol% were successfully profiled using ABS transducers of 1, 2 and 4 MHz frequencies. This approach enabled the simultaneous visualisation of both the settling interface and sediment bed formation, generating sedimentation curves and eluding settling velocities. Furthermore, backscatter attenuation was empirically correlated with the attenuation-concentration relationship established for homogenous dispersions, to obtain concentration profiles of the settling suspensions. The data depicted concentration changes as a function of time in a hindered settling suspension, and allowed observation of the segregation of a size polydisperse suspension. Data were compared with sedimentation data obtained via two common ex situ bench-scale techniques. Critically, the acoustic backscatter method was validated as a powerful in situ characterisation tool for opaque concentrated heterogeneous dispersions, with the ability to provide concentration density information in conjunction with settling kinetics that is not easily attainable via other methods.

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Section: Introductionmentioning

confidence: 99%

In situ characterisation of a concentrated colloidal titanium dioxide settling suspension and associated bed development: Application of an acoustic backscatter system

et al. 2015

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“…In this case the sensors are conducting electrodes that are typically in contact with the process, but need not intrude (Dickin and Wang 1996, Brown, Barber and McArdle 1992, Wang, Dickin and Williams 1997. The drive unit produces sinusoidal currents that are used to estimate a tomographic trans-conductance projection.…”

Section: Electrical Resistance Tomography Sensor Sub-systemmentioning

confidence: 99%

Design and application of a multi-modal process tomography system

Hoyle

Jia

Podd

et al. 2001

Meas. Sci. Technol.

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Article:Hoyle, B.S., Jia, X., Podd, F.J.W. et al. (6 more authors) (2001) Design and application of a multi-modal process tomography system. Measurement Science and Technology, 12 (8 ABSTRACTThis paper presents a design and application study of an integrated multi-modal system designed to support a range of common modalities: electrical resistance, electrical capacitance and ultrasonic tomography. Such a system is designed for use with complex processes that exhibit behaviour changes over time and space, and thus demand equally diverse sensing modalities. A multi-modal process tomography system able to exploit multiple sensor modes must permit the integration of their data, probably centred upon a composite process model. The paper presents an overview of this approach followed by an overview of the systems engineering and integrated design constraints. These include a range of hardware oriented challenges: the complexity and specificity of the front end electronics for each modality; the need for front end data pre-processing and packing; the need to integrate the data to facilitate data fusion; and finally the features to enable successful fusion and interpretation. A range of software aspects are also reviewed: the need to support differing front-end sensors for each modality in a generic fashion; the need to communicate with front end data pre-processing and packing systems; the need to integrate the data to allow data fusion; and finally to enable successful interpretation. The review of the system concepts is illustrated with an application to the study of a complex multi-component process.

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“…Electrical Resistance Tomography (ERT) is a popular process monitoring technique in industrial applications and there are numerous aqueous-based processes to which ERT is suited [1]. The aim of ERT is to reconstruct the conducting (or dielectric) properties of an object from ERT measurements of electrical signals, taken from all possible views of the sensing electrodes [2].…”

Section: Introductionmentioning

confidence: 99%

Design of a low-cost integrated Electrical Resistance Tomography(ERT) system based on serial bus

Wang

Liu

Ανδρικόπουλος

et al. 2016

2016 IEEE International Conference on Imaging Systems and Techniques (IST)

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Abstract-A low-cost integrated ERT system based on serial bus and 2 evaluation boards with 8 electrodes is designed and implemented. Tikhonov regularization is adopted for image reconstruction with conductance values measured from the designed system. Test results suggest that the system can produce reliable and repeatable measurements for image reconstructions of multiple objects with the cost lower than 100 GBP. Comparisons between the proposed low-cost system and commercial ERT system are also implemented to conclude the advantages and drawbacks of the proposed system.

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Electrical resistance tomography for process applications

Cited by 345 publications

References 32 publications

In situ characterisation of a concentrated colloidal titanium dioxide settling suspension and associated bed development: Application of an acoustic backscatter system

In situ characterisation of a concentrated colloidal titanium dioxide settling suspension and associated bed development: Application of an acoustic backscatter system

Design and application of a multi-modal process tomography system

Design of a low-cost integrated Electrical Resistance Tomography(ERT) system based on serial bus

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