| 电容层析成像系统中传感器状态监控和检测量在线修正 |
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| 引用本文： | 张惠良,荣冈.电容层析成像系统中传感器状态监控和检测量在线修正[J].化工学报,2005,56(4):664-667. |
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| 作者姓名： | 张惠良 荣冈 |
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| 作者单位： | Institute of Advanced Process Control，Zhejiang University，Hangzhou 310027，Zhejiang，China，Institute of Advanced Process Control，Zhejiang University，Hangzhou 310027，Zhejiang，China |
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| 摘 要： | IntroductionResearches on electrical capacitancetomography (ECT)1—3] have been done in recentyears. However, for engineering application,such as solids/gas monitoring, online calibrationcan not be implemented. Affected by the abrasionof the sensor pipe interior wall during pneumatictransport, the solids volume fraction(concentration) calculated from the reconstructedimage based on data from this sensor will be highlyinaccurate.…
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| 关 键 词： | electrical capacitance tomography system calibration sensor wall’s abrasion sensor status |
Sensor monitoring and online measurement correction in electric capacitance tomography system |
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| ZHANG Huiliang,RONG Gang.Sensor monitoring and online measurement correction in electric capacitance tomography system[J].Journal of Chemical Industry and Engineering(China),2005,56(4):664-667. |
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| Authors: | ZHANG Huiliang RONG Gang |
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| Abstract: | The recalibration of electrical capacitance tomography (ECT) system is one of the key problems in keeping the system running steadily.However, for engineering application in solids/gas transport,online calibration can not be implemented and the data from this sensor may be unreliable due to the sensor pipe interior wall abrasion during pneumatic transport,so the solids concentration calculated from the reconstructed image based on these data will be highly inaccurate.The simulations show that, the inter-electrode relative capacitance variation of electrode pair spacing 1 is the most sensitive to the abrasion of sensor pipe interior wall, so this relative capacitance variation when the sensor is filled with air can be used as an indicator demanding offline system recalibration when the wall abrasion goes significant.Furthermore, while the pipe interior wall abrasion is not very serious, online correcting measured inter-electrode capacitance with wall capacitance variation can improve the accuracy of concentration calculation. |
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| Keywords: | electrical capacitance tomography system calibration sensor wall's abrasion sensor status |
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