Online monitoring of oil film using electrical capacitance tomography and level set method

The Review of Scientific Instruments
Q XueH X Wang

Abstract

In the application of oil-air lubrication system, electrical capacitance tomography (ECT) provides a promising way for monitoring oil film in the pipelines by reconstructing cross sectional oil distributions in real time. While in the case of small diameter pipe and thin oil film, the thickness of the oil film is hard to be observed visually since the interface of oil and air is not obvious in the reconstructed images. And the existence of artifacts in the reconstructions has seriously influenced the effectiveness of image segmentation techniques such as level set method. Besides, level set method is also unavailable for online monitoring due to its low computation speed. To address these problems, a modified level set method is developed: a distance regularized level set evolution formulation is extended to image two-phase flow online using an ECT system, a narrowband image filter is defined to eliminate the influence of artifacts, and considering the continuity of the oil distribution variation, the detected oil-air interface of a former image can be used as the initial contour for the detection of the subsequent frame; thus, the propagation from the initial contour to the boundary can be greatly accelerated, making it possib...Continue Reading

References

Jan 1, 1996·IEEE Transactions on Image Processing : a Publication of the IEEE Signal Processing Society·R Malladi, J A Sethian
Aug 31, 2010·IEEE Transactions on Image Processing : a Publication of the IEEE Signal Processing Society·Chunming LiMartin D Fox
May 9, 2014·IEEE Transactions on Image Processing : a Publication of the IEEE Signal Processing Society·Xi YangXuelong Li

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Citations

May 18, 2016·Philosophical Transactions. Series A, Mathematical, Physical, and Engineering Sciences·E Al Hosani, M Soleimani

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