The Research of Electrical Capacitance Tomography System for Large Industrial Equipments

Lu, Decai; Shao, Fuqun; Guo, Zhiheng; Yan, Wenjun

doi:10.1109/cas-ictd.2009.4960899

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The Switches Arrangement1

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2013

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“…Each electrode can be in three different states, e.g. excitation state, detection state, and grounding state [5]. The states of switches are shown as table 1.…”

Section: The Switches Arrangementmentioning

confidence: 99%

The Research of High Voltage Electrical Capacitance Tomography System

Lu¹,

Wu²,

Shao

2013

AMM

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The electrical capacitance tomography (ECT) was used to detect multiphase flows in pipelines, fluidization process and combustion phenomena in internal combustion engines, and so on. In the mentioned applications, none of them has equipment or vessel with inner diameter exceeding 1 meter. Nevertheless, there are some of large equipments like blast furnaces, coal bunkers and so on, need to detect its content distribution. These requirements could be met by ECT technology. But there are not any ECT systems can be used to detect content distribution of those large equipments, because the existing system can not measure the capacitance in change which was changed by content distribution. A new method of high AC voltage excitation and C/V circuits which has a higher excitation voltage about 20~50 times than the previous ac-based system, with an 8-electrodes sensor array that is amounted on a 2.5m inner diameter object constructed a High Voltage Electrical Capacitance Tomography (HVECT) system in laboratory. Image reconstruction experiments show that the HVECT is applicable to monitor the content distribution in the future.

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“…Each electrode can be in three different states, e.g. excitation state, detection state, and grounding state [5]. The states of switches are shown as table 1.…”

Section: The Switches Arrangementmentioning

confidence: 99%