Development of an Electrical Capacitance Tomography system using four rotating electrodes

Virtual Instrument for Online Electrical Capacitance Tomography

“…Experimental results have shown that the VI is capable of detecting the oil-air interface as well as catching the dynamics such as the air bubble translation in the oil flow. The introduced VI design can be further expanded to include multiple-excitation (Fan & Gao, 2011), grouping schemes (Olmos, et al, 2008), and advanced image retrieving algorithms to improve the time and spatial resolution of ECT.…”

“…For AC-based method, a multiple excitation scheme (Fan & Gao, 2011) has been designed and tested to increase the frame rate for higher time resolution in monitoring fast changing dynamics inside the container. The grouping method (Olmos et al, 2008) is another technique investigated to increase the magnitude of the received signals by combining two or more electrodes into one segment. ECT has also been applied to generate 3-D material distribution by mounting electrodes in multiple layers along the axis of the cylindrical container and detecting the cross-layer capacitance values (Marashdeh & Teixeira, 2004;Warsito et al, 2007).…”

An explicit conditioning method for image reconstruction in electrical capacitance tomography

“…Image reconstruction is performed using a linear model which approximates the causal is recorded under either a parallel assumption [3,12], a series assumption [5], or a combination of both [8,13]. While the computational expense of this technique is feasible for 2D systems, it is prohibitive for large 3D meshes [14].…”

Adaptative ECT system based on reconfigurable electronics

“…In the recent years an alternative approach for the development of the electronics for sensor reading and interfacing has been proposed based on the use of reconfigurable devices [13][14][15][16]. This instrumentation is usually designed using Field-Programmable Gate Arrays (FPGA) as digital blocks and Field-Programmable Analog Arrays (FPAA) as analog blocks.…”