Oil-water moisture content measurement sensor

Abstract

The invention relates to a sensor for measuring water content of oil water. The sensor comprises a double-layer nested housing and a pair of wide-band antenna; wherein the double-layer nested housing comprises an external layer shielding housing and an internal layer isolation housing which is coaxially nested in the external layer shielding housing, an interval is arranged between the external layer shielding housing and the internal layer isolation housing and is filled with a water-absorption substance, the wide-band antenna can be symmetrically arranged between the external layer shielding housing and the internal layer isolation housing, and the radiation direction of the wide-band antenna is perpendicular to the antenna. The pollution on the sensor by crude oil is little, compared with a ray method for measuring the water content of a medium, the sensor has the advantages of high security, economical and practical performances, and low cost, compared with a ultrasonic method, the pressure influence on signal transmission is little.

Description

technical field [0001] The invention belongs to the technical field of water content measurement, and in particular relates to a sensor for detecting water content in oil-water mixture by using a broadband antenna based on electromagnetic wave transmission characteristics, which can be applied to the detection of water content of crude oil or other media in the petrochemical industry. Background technique [0002] Oil fields contain a lot of water, so the oil that is extracted contains a lot of water. Crude oil and water are immiscible, but the extracted oil and water are not simply mixed together, but exist in the form of an emulsion or in the state of oil-in-water and water-in-oil. The emulsification of crude oil has brought great challenges to the extraction of crude oil. In terms of transportation, the moisture contained in crude oil increases the quality and volume of crude oil, reducing the utilization rate of oil pipelines, oil storage tanks and other equipment; in t...

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Problems solved by technology

[0003] Using the electromagnetic wave transmission characteristics to measure the moisture content of the medium is one of the main means of measuring the moisture content of the electromagnetic wave method. The existing narrowband antennas are mainly used to measure the water content of the medium by using the electromagnetic wave transmission characteristics to measure single-frequency or multiple single-frequency signals. However, When the water content of the medium changes, the reflection coefficient of the narrowband antenna will change, and the radiation efficiency of the antenna will also change. The change of the measured transmission attenuation not only includes the attenuation caused by the change of the water content of the medium, but also the radiation efficiency of the antenna. attenuation; at the same time, the sensor is interfered by the electromagnetic wave reflection signal of the metal shielding shell during the measurement, which will also affect the transmission attenuation, resulting in large errors in the current method of measuring water content using electromagnetic wave transmission characteristics, and the application is limited.

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