Abstract
This paper presents a method of measuring charge density of oil in pipeline by built-in capacitive coupling inductive electrode. This new type of electrode solved the problem of charge leak in the contacting measurements, and effectively reduced the influence of external factors on the measured results. The three-dimensional model of the electrode in the pipeline was built and was calculated to give the amount of charge captured by the outer electrode which changed with the charge density of oil in the pipeline. The potential of the inner electrode was obtained on the basis of the relationship between the amount of charge and the capacitance, by which the charge density of oil in the pipeline was reflected. This research provided a more effective method for measuring charge density of oil in pipeline.
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