Field analysis and electrical models of multi-electrode impedance sensors

Szczepanik, Zdzisław; Rucki, Z.

doi:10.1016/j.sna.2006.04.001

Cited by 8 publications

(4 citation statements)

References 10 publications

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“…The middle plane is mainly for image reconstruction, while the other two planes are auxiliary planes for the compensation of fringe effect induced by objects outside the sensor plane. According to a 3D model for ERT [8,20], objects inside the ERT sensor can be sensed by all the three electrode planes if the same excitation signal and measurement strategy applied to all the three electrode planes simultaneously. Similarly, objects above or below the middle plane are sensed by the middle plane and top or bottom plane at the same time.…”

Section: Simulation and Resultsmentioning

confidence: 99%

Investigation of Multi-Plane Scheme for Compensation of Fringe Effect of Electrical Resistance Tomography Sensor

Tian

Liang

et al. 2019

Sensors

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Conventional electrical resistance tomography (ERT) sensors suffer from the fringe effect, i.e., severe distortion of the electric field on both ends of the measurement electrodes, leading to a 3D sensing region for a 2D sensor. As a result, the objects outside an ERT sensor plane affect the sensing and hence image, i.e., deteriorating the image quality. To address this issue, a multiple-plane ERT sensor scheme is proposed in this paper. With this scheme, auxiliary sensor planes are used to provide references for the fringe effect of the measurement plane, for compensation by subtracting the weighed influence of the fringe effect. Simulation results show that the proposed scheme, either three-plane or two-plane sensor, can compensate for the fringe effect induced by objects outside the measurement plane with a variety of axial object distributions, i.e., several non-conductive bars or conductive bars placed at different cross-sectional and axial positions inside the sensor. Experiments were carried out. Images obtained with single-plane and multiple-plane ERT sensors are compared, and the proposed compensation scheme has been hence verified.

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Section: Simulation and Resultsmentioning

confidence: 99%

Investigation of Multi-Plane Scheme for Compensation of Fringe Effect of Electrical Resistance Tomography Sensor

Tian

Liang

et al. 2019

Sensors

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“…Szczepanik and Rucki [109] performed a field analysis and investigated electrical models of multi-electrode impedance sensors. Two types of multi-electrode sensors, used in the impedance tomography systems, were simulated with FEA (COSMOSM software) in order to produce a simple, practical lumped-parameter model.…”

Section: Endt Involving Static Electric Potentialmentioning

confidence: 99%

Finite Element Method Applied in Electromagnetic NDTE: A Review

Augustyniak

Usarek

2016

J Nondestruct Eval

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The paper contains an original comprehensive review of finite element analysis (FEA) applied by researchers to calibrate and improve existing and developing electromagnetic non-destructive testing and evaluation techniques, including but not limited to magnetic flux leakage (MFL), eddy current testing, electromagnetic-acoustic transducers (EMATs). Premium is put on the detection and modelling of magnetic field, as the vast majority of ENDT involves magnetic induction, either as a primary variable MFL or a complementary phenomenon (EC, EMATs). FEA is shown as a fit-for-purpose tool to design, understand and optimise ENDT systems, or a Reference for other modelling algorithms. The review intentionally omits the fundamentals of FEA and detailed principles of NDT. Strain-stress FEA applications in NDT, especially in ultrasonography and hole-drilling methodology, deserve as well a separate study.

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“…Note that all simulation was done on a PC with an Intel CoreTM i7-2600 3.4 GHz CPU, 64-bit Windows7 and 8 GB memory. Also note that the contact impedance is not included in all the ERT sensors to isolate the fring effect from other error sources and also because the contact impedance in an industrial application can be ignored with the current injection strategy and a measurement circuit of high input impedance (Szczepanik and Rucki, 2007). Fig.…”

Section: Simulation Model For Ert Sensormentioning

confidence: 99%

“…For the former there is a single coupling capacitance between the excitation and detection electrodes and for the latter there is actually a voltage divider involving all the impedances between possible electrode pairs. With the adjacent current injection and voltage measurement strategy, the detailed equivalent circuit for ERT measurement can be found in (Szczepanik and Rucki, 2007) and is shown in Fig. 6, which is for 2D case only.…”

Section: Simulation Model For Ert Sensormentioning

confidence: 99%