A Limited Region Electrical Capacitance Tomography for Detection of Deposits in Pipelines

Hosani, Esra Al; Zhang, Maomao; Soleimani, Masoud

doi:10.1109/jsen.2015.2453361

Cited by 36 publications

(13 citation statements)

References 38 publications

(35 reference statements)

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“…The foam is represented by a pipe in the center of the flask and the metal will exist in this area. The collected measurements are relative to the metal distribution inside the imaging area [25,26]. In the second stage, there is a data acquisition system (base-station) collecting the data wirelessly from the sensors and working as a bridge between the sensing circuits and the FPGA platform.…”

Section: Ect Systemmentioning

confidence: 99%

FPGA Implementation of ECT Digital System for Imaging Conductive Materials

Deabes

2019

Algorithms

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This paper presents the hardware implementation of a stand-alone Electrical Capacitance Tomography (ECT) system employing a Field Programmable Gate Array (FPGA). The image reconstruction algorithms of the ECT system demand intensive computation and fast processing of large number of measurements. The inner product of large vectors is the core of the majority of these algorithms. Therefore, a reconfigurable segmented parallel inner product architecture for the parallel matrix multiplication is proposed. In addition, hardware-software codesign targeting FPGA System-On-Chip (SoC) is applied to achieve high performance. The development of the hardware-software codesign is carried out via commercial tools to adjust the software algorithms and parameters of the system. The ECT system is used in this work to monitor the characteristic of the molten metal in the Lost Foam Casting (LFC) process. The hardware system consists of capacitive sensors, wireless nodes and FPGA module. The experimental results reveal high stability and accuracy when building the ECT system based on the FPGA architecture. The proposed system achieves high performance in terms of speed and small design density.

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Section: Ect Systemmentioning

confidence: 99%

FPGA Implementation of ECT Digital System for Imaging Conductive Materials

Deabes

2019

Algorithms

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“…When multiple electrodes are employed, capacitance and impedance tomography can be performed, for instance, placing an array of electrodes around organs in the body (for noninvasive biomedical imaging and artificial skin sensing [6]) or around an insulating pipe to track the liquid composition [7]. Three-dimensional tomographic maps can be reconstructed with proper algorithms solving the inverse problem, by sequentially stimulating one electrode and measuring the response of all the others.…”

Section: Capacitive Sensorsmentioning

confidence: 99%

Advances in High-Resolution Microscale Impedance Sensors

Carminati

2017

Journal of Sensors

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Sensors based on impedance transduction have been well consolidated in the industry for decades. Today, the downscaling of the size of sensing elements to micrometric and submicrometric dimensions is enabled by the diffusion of lithographic processes and fostered by the convergence of complementary disciplines such as microelectronics, photonics, biology, electrochemistry, and material science, all focusing on energy and information manipulation at the micro- and nanoscale. Although such a miniaturization trend is pivotal in supporting the pervasiveness of sensors (in the context of mass deployment paradigms such as smart city, home and body monitoring networks, and Internet of Things), it also presents new challenges for the detection electronics, reaching the zeptoFarad domain. In this tutorial review, a selection of examples is illustrated with the purpose of distilling key indications and guidelines for the design of high-resolution impedance readout circuits and sensors. The applications span from biological cells to inertial and ultrasonic MEMS sensors, environmental monitoring, and integrated photonics.

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“…Microwave technologies have also been described for evaluating electrofusion welds [18]. Images of changes in dielectric properties of polymer pipework can be measured using electrical capacitance tomography over a limited region [19], but needs careful use in terms of distance from the sample. X-ray CT has also been investigated for measuring the physical state of polymers, and could be applied to pipe inspection [20].…”

Section: Introductionmentioning

confidence: 99%

Mid Infrared Tomography of Polymer Pipes

et al. 2020

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Mid-infrared signals in the 2–5 μm wavelength range have been transmitted through samples of polymer pipes, as commonly used in the water supply industry. It is shown that simple through-transmission images can be obtained using a broad spectrum source and a suitable camera. This leads to the possibility of tomography, where images are obtained as the measurement system is rotated with respect to the axis of the pipe. The unusual 3D geometry created by a source of finite size and the imaging plane of a camera, plus the fact that refraction at the pipe wall would cause significant ray bending, meant that the reconstruction of tomographic images had to be considered with some care. A result is shown for a thinning defect on the inner wall of a polymer water pipe, demonstrating that such changes can be reconstructed successfully.

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A Limited Region Electrical Capacitance Tomography for Detection of Deposits in Pipelines

Cited by 36 publications

References 38 publications

FPGA Implementation of ECT Digital System for Imaging Conductive Materials

FPGA Implementation of ECT Digital System for Imaging Conductive Materials

Advances in High-Resolution Microscale Impedance Sensors

Mid Infrared Tomography of Polymer Pipes

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