A Phase Amplitude Analysis Method and Detection Device for Electromagnetic Detection of Oil Abrasive Particles

Abstract

The invention discloses an electromagnetic phase amplitude analysis method for detecting oil abrasive particles and a detection device thereof, which is used for distinguishing and detecting ferromagnetic and non-ferromagnetic particles of oil metal particles (2) in a hydraulic system pipeline (1), and a retrieval device (3) comprising an externally penetrating electromagnetic detection device (31), characterized in that the retrieval device (3) also includes a wear particle concentration detection device (32) for detecting the concentration of metal particles in the oil, wherein the electromagnetic detection device (31) The abrasive particle concentration detection device (32) is arranged on the periphery of the same position as the detection hydraulic system pipeline (1). Obtain the relationship curve between signal phase and ferromagnetic particle content (percentage) through simulation or experiment, and project the actual signal phase onto the curve to obtain the ferromagnetic particle content, so as to realize the analysis of ferromagnetic materials and non-ferromagnetic materials of oil abrasive particles Differential detection of the content of each component.

Description

technical field [0001] The invention relates to the technical field of electromagnetic non-destructive testing, in particular to a differential detection of metal abrasive particles in oil, in particular to a phase amplitude analysis method and a detection device for electromagnetic detection of oil abrasive particles. Background technique [0002] Hydraulic systems are widely used in modern industries, aerospace, ships, etc., all of which are applied to sophisticated hydraulic systems. The in-service maintenance of the hydraulic system is also a very important part of ensuring its safe work. The detection and monitoring of oil is a common method for evaluating the condition of various machines and predicting various failures. The detection of abrasive particles in oil is an indispensable method in modern industrial maintenance activities, which is to ensure the long-term effective and stable operation of the hydraulic system. The conventional detection method can reduce th...

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Problems solved by technology

Usually, optical or electromagnetic detection methods are used, and the grades and numbers of large and small abrasive particles need to be determined separately for analysis and judgment of the working status of the hydraulic system, but it is not easy to distinguish ferromagnetic and non-ferromagnetic

[0003] For example, the Chinese invention patent CN201610255463.1 of Dalian Maritime University is based on a microfluidic chip-based particle on-line detection device and its detection method, which distinguishes ferromagnetic particles through the magnetic field attraction of magnetic components installed outside the pipeline. The method of extracting ferromagnetic particles with a magnetic device in a solution is relatively complicated

Moreover, the conventional electromagnetic on-line detection method needs to distinguish the number of tiny abrasive particles, and usually can detect particles larger than a few microns. The magnetic and non-ferromagnetic metal components are mixed, relying on the magnetic suction device installed outside the pipeline, or other magnetic suction extraction, the relative accuracy is not high or more complicated

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