Multiple ring electrode array imaging sensor

Abstract

The invention discloses a multiple ring electrode array imaging sensor. The sensor is located in two-phase fluid and does not contact with the inner wall of a measurement pipe. The sensor is mainly used to perform electrical imaging to multiphase fluid runner cross-sections with large conductivity difference and measure the component content of each phase. The sensor of the invention comprises measurement electrodes, a supporting arm and a supporting shaft, wherein the measurement electrodes are arranged on the supporting arm and the supporting shaft and on different circumferences with the same center of the supporting shaft in a radial manner; and different wires are led to the measurement electrodes, the measurement electrodes are independent, the measurement electrodes are insulated from the supporting arm and the supporting shaft, and the flow channel of liquid to be measured is a circular channel between the supporting shaft and the pipe wall. The structure of the invention breaks through the non-invasive traditional model of tomography, thus effectively reducing the influence on limiting the soft field effect of tomography; and multi-state measuring mode can be adopted, the local distribution information of components in each phase of multiphase fluid on the entire pipe or pipe cross section can be determined, the measurement accuracy is high, and the reliability is good.

Description

technical field [0001] The invention relates to a detection device, in particular to a multi-ring electrode array imaging sensor, which is used for electrically imaging the cross-section of a multiphase fluid flow channel with a large difference in conductivity, and measuring the component content of each phase. Background technique [0002] Multiphase flow measurement is a common problem in the development of engineering technology, and has an obvious industrial application background. Compared with single-phase flow, there are interface effects and slip velocity between multiphase mobile phases, and its flow characteristics are more complicated. Therefore, in order to establish a reliable multiphase flow dynamics model and design, control and predict the multiphase flow process, the problem of parameter detection in the multiphase flow process must be solved. Conventional parameter detection techniques are mostly discrete point measurements, which cannot reflect the two-d...

AI Technical Summary

Problems solved by technology

This structure has the characteristics of safety and reliability, does not hinder fluid flow, and is easy to install. However, due to the limitation of the number of electrodes and the distribution position, the amount of information that can be obtained by sensors of this type of structure is small, resulting in low resolution in the center of the pipeline, which affects image quality

In addition, in some fields (such as oil field production logging), the electrode array of the sensor is difficult to install on the wall of the flow channel, which limits the use of "non-invasive" structural sensors for electrical imaging.

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