Resolution analysis using fully 3D electrical capacitive tomography

Ye, Zhuoyi; Wei, Hsin-Yu; Soleimani, Masoud

doi:10.1016/j.measurement.2014.10.060

Cited by 23 publications

(13 citation statements)

References 19 publications

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“…This has led to numerous techniques being developed to sense untagged objects. One of the more common techniques in this body of research is Electrical Capacitance Tomography (ECT) [43,44]. The technique measures the distribution of capacitance across sensor electrodes affected by the target object.…”

Section: Capacitive Sensing For Object Recognitionmentioning

confidence: 99%

Capacitivo

Tan

Zhang

et al. 2020

Proceedings of the 33rd Annual ACM Symposium on User Interface Software and Technology

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We present Capacitivo, a contact-based object recognition technique developed for interactive fabrics, using capacitive sensing. Unlike prior work that has focused on metallic objects, our technique recognizes non-metallic objects such as food, different types of fruits, liquids, and other types of objects that are often found around a home or in a workplace. To demonstrate our technique, we created a prototype composed of a 12 x 12 grid of electrodes, made from conductive fabric attached to a textile substrate. We designed the size and separation between the electrodes to maximize the sensing area and sensitivity. We then used a 10-person study to evaluate the performance of our sensing technique using 20 different objects, which yielded a 94.5% accuracy rate. We conclude this work by presenting several different application scenarios to demonstrate unique interactions that are enabled by our technique on fabrics.

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Section: Capacitive Sensing For Object Recognitionmentioning

confidence: 99%

Capacitivo

Tan

Zhang

et al. 2020

Proceedings of the 33rd Annual ACM Symposium on User Interface Software and Technology

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“…A series of systematically arranged sensors is fitted in the monitored space. In our case the sensors are located around the circumference of an experimental cylindrical storage device at two planes [3,8,9,10]. The sensors are not in direct contact with the measured bulk material.…”

Section: Introductionmentioning

confidence: 99%

Monitoring of air tunnels in a cylindrical storage device using ECT tomography

et al. 2019

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This article focuses on the monitoring of air tunnels in sand, which in common practice are characterised as flow disturbances in the flow of bulk materials inside storage devices, hoppers, silos etc. In this case air tunnels are monitored by the ECT (Electrical Capacitance Tomography) method. The basic principle of the ECT tomographic method is the measurement of permittivity of a measured non-conducting medium. The results gained by an ECT device are then compared with the real, precisely defined measured state. The measured results show that the monitoring of flow disturbances in storage devices using ECT is a new method which does not use optical methods during measurement.

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“…Coplanar array ECT is similar to traditional ECT, which is also ill-posed because the amount of independent capacitance data is far less than the number of permittivity units. To improve this problem, Wei [ 7 ], Ren [ 8 ] and Ye [ 9 ] take the approach of increasing the number of electrodes and change the shape of the sensor. Furthermore, the full incentive pattern is used to get the most out of independent capacitance data [ 10 ].…”

Section: Introductionmentioning

confidence: 99%

Redundancy Analysis of Capacitance Data of a Coplanar Electrode Array for Fast and Stable Imaging Processing

Wen

Zhang

et al. 2017

Sensors

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A coplanar electrode array sensor is established for the imaging of composite-material adhesive-layer defect detection. The sensor is based on the capacitive edge effect, which leads to capacitance data being considerably weak and susceptible to environmental noise. The inverse problem of coplanar array electrical capacitance tomography (C-ECT) is ill-conditioning, in which a small error of capacitance data can seriously affect the quality of reconstructed images. In order to achieve a stable image reconstruction process, a redundancy analysis method for capacitance data is proposed. The proposed method is based on contribution rate and anti-interference capability. According to the redundancy analysis, the capacitance data are divided into valid and invalid data. When the image is reconstructed by valid data, the sensitivity matrix needs to be changed accordingly. In order to evaluate the effectiveness of the sensitivity map, singular value decomposition (SVD) is used. Finally, the two-dimensional (2D) and three-dimensional (3D) images are reconstructed by the Tikhonov regularization method. Through comparison of the reconstructed images of raw capacitance data, the stability of the image reconstruction process can be improved, and the quality of reconstructed images is not degraded. As a result, much invalid data are not collected, and the data acquisition time can also be reduced.

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Resolution analysis using fully 3D electrical capacitive tomography

Cited by 23 publications

References 19 publications

Capacitivo

Capacitivo

Monitoring of air tunnels in a cylindrical storage device using ECT tomography

Redundancy Analysis of Capacitance Data of a Coplanar Electrode Array for Fast and Stable Imaging Processing

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