Oil liquid quality parameter detection method, sensor and on-line detection device

Abstract

The present invention provides an oil liquid quality parameter detection method which is as follows: first, a sensing device first sensing signal when no magnetic field is in a to-be-tested oil liquid and a sensing device second sensing signal when a magnetic field is in the to-be-tested oil liquid are obtained, wherein a sensing device sensing end surface is placed in the to-be-tested oil liquid, a sensing device comprises a planar capacitive or quartz crystal microbalance, and the sensing signals comprise capacitance value signals or vibration signals; oil liquid quality parameters can be calculated by a predetermined algorithm according to the first sensing signal and the second sensing signal, wherein the oil liquid quality parameters comprise at least one of dielectric constant, moisture content, pH, acid the total amount of acid oxidizing materials and ferromagnetic particle content. Compared with the prior art, the above five oil liquid quality parameters can be fast calculated in real time only by use of the planar capacitive or quartz crystal microbalance, and the oil liquid quality can be more accurately judged.

Description

technical field [0001] The invention relates to the field of oil detection, in particular to two oil quality parameter detection methods, an oil quality parameter sensor, and an oil quality parameter online detection device. Background technique [0002] At present, the failure modes of the transmission part of transportation and mechanical equipment mainly include wear, corrosion and fracture. A large number of statistics show that the failure of the engine is mainly related to lubrication, and the content of ferromagnetic particles, moisture content, and pH changes in lubricating oil are the causes of system failure. major factor. [0003] After the lubricating oil is used for a period of time, due to the intrusion of external impurities, its own oxidation, coagulation, hydrolysis and decomposition, friction and wear of parts, etc., the oil will deteriorate, and the viscosity, acidity, ferromagnetic particle content, and The physical and chemical properties such as moistu...

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Problems solved by technology

[0005] In the prior art, the online oil quality parameter sensor mainly detects the viscosity of the oil, and judges the quality of the oil according to the viscosity of the oil. Among them, the FPS2800 series multi-parameter online oil quality sensor of the American precision MEAS company, Using the patented quartz tuning fork technology, by detecting the relationship between the mechanical resonance characteristics of the quartz tuning fork in the oil and the physical parameters of the oil, and through a special calculation algorithm, four types of oil viscosity, density, dielectric constant and temperature parameters can be measured at the same time Quality parameters can comprehensively evaluate the quality of oil from many aspects, but for key indicators such as ferromagnetic particle content, moisture content, and pH that can more accurately reflect oil quality, there is currently no method or device that can achieve real-time online detection At the same time, it is considered to detect more parameters to reflect the quality of the oil more comprehensively, simplify the structural design of mechanical equipment, reduce the size of the product, and facilitate installation, especially for high-speed trains that have high requirements for oil quality inspection and assembly space. In a narrow situation, the existing technology lacks an online detection device for oil quality parameters with high redundancy, simple structure, small size, and easy installation

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