Multifrequency microwave detecting system for moisture content

Abstract

The invention discloses a multifrequency microwave detecting system for moisture content. The multifrequency microwave detecting system comprises a microprocessor circuit, a wide-band power amplifier, a wide-band high-frequency power divider, an amplitude and phase discriminating device, a signal amplifier, a communication circuit and a voltage-controlled oscillator, wherein the microprocessor circuit outputs a voltage control signal; the voltage-controlled oscillator is controlled to output a variable frequency signal with the frequency of 300MHz to 2.4GHz; after the variable frequency signal passes through the wide-band power amplifier and the wide-band high-frequency power divider, one path is outputted to an antenna, and the other path is outputted to the wide-band amplitude and phase discriminating device; a signal returned from the antenna is also transmitted to the wide-band amplitude and phase discriminating device for comparing; after a signal outputted by the amplitude and phase discriminating device is transmitted to the microprocessor circuit for sampling and processing, obtained data are transmitted to a communication circuit; due to the adoption of the multifrequency microwave detecting system for the moisture content, interval time can be set from 1ms to 1s; the attenuation of mineralization degree to a high-frequency signal is lower than that of the mineralization degree to a low-frequency signal, so that the influence of the mineralization degree is eliminated by measuring different frequencies.

Description

technical field [0001] The invention relates to the technical field of detection, in particular to a multi-frequency microwave moisture content detection system. Background technique [0002] The detection of water content in crude oil is an unsolved problem in the petroleum industry for many years. Many research institutions have tried methods such as conductivity method, capacitance method, radio frequency attenuation and microwave resonance, but they cannot be solved well. The main reason is that the composition of crude oil is complex, the salinity content varies from high to low, and the oil-water form is complex, and there are various forms such as water-in-oil or oil-in-water. [0003] Therefore, it is necessary to provide a new multi-frequency microwave moisture content detection system to solve the above problems. Contents of the invention [0004] Aiming at the deficiencies of the prior art, the object of the present invention is to provide a multi-frequency mic...

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Problems solved by technology

[0002] The detection of water content in crude oil is an unsolved problem in the petroleum industry for many years. Many research institutions have tried methods such as conductivity method, capacitance method, radio frequency attenuation and microwave resonance, but they cannot be solved well.

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