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Capacitance-reactance oil detection system and manufacturing method thereof

A detection system and manufacturing method technology, applied in the direction of material capacitance, etc., can solve the problems that water droplets and air bubbles cannot be detected, metal particles cannot be distinguished, and various particles cannot be comprehensively detected.

Active Publication Date: 2016-11-09
DALIAN MARITIME UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The inductance detection method can distinguish and detect ferromagnetic particles and non-ferromagnetic particles in oil, and is not easily affected by external factors and has high stability. However, this method cannot detect water droplets and air bubbles in oil, and the detection The accuracy is not as high as the above methods
The capacitance detection method can distinguish and detect water droplets and air bubbles in the oil according to the dielectric constant of the medium between the two plates, but cannot distinguish the metal particles
The above methods can only measure a single parameter of the oil, and can only detect one or two types of particles in the oil, and cannot comprehensively detect multiple particles

Method used

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  • Capacitance-reactance oil detection system and manufacturing method thereof
  • Capacitance-reactance oil detection system and manufacturing method thereof
  • Capacitance-reactance oil detection system and manufacturing method thereof

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Embodiment 1

[0050] combine figure 1 , figure 2 with image 3 , see Image 6 , a capacitive reactance oil detection system, including a detection device, a measurement mode switching unit 11 and an excitation-detection unit 12.

[0051] The detection device includes a microfluidic chip and a sensing unit 5 , and the microfluidic chip includes a microchannel inlet 1 , a microchannel 2 , a substrate 3 , a model material 4 and a microchannel outlet 6 .

[0052] The sensing unit 5 is made up of two identical first single-layer coils 7 and a second single-layer coil 14, and the two single-layer coils 7, 14 are arranged oppositely on both sides of the microchannel 2; the first single-layer The coil 7 has a first lead end 15 and a second lead end 16 , and the second single-layer coil 14 has a third lead end 17 and a fourth lead end 18 .

[0053] The two single-layer coils 7 and 14 are wound by enameled wire, the inner diameter of the coil is 300-1000 microns, the wire diameter of the enamele...

Embodiment 2

[0063] see figure 1 with Image 6 , the manufacturing method of the capacitive reactance oil detection system of the present invention is divided into three steps in total, specifically:

[0064] The first step is to make the detection device. First, the microchannel mold and two single-layer coils 7, 14 are fixed on the substrate 3 according to the predetermined position; then the model material 4 is poured on the substrate 3 to solidify the model material 4; finally the microchannel mold is removed from the cured The model material 4 is drawn out, and holes are punched at both ends of the microchannel 2 with a puncher to form the microchannel inlet 1 and the microchannel outlet 6, and thus the detection device is completed. The material of the above-mentioned base 3 is glass. The four lead ends of the two single-layer coils 7 , 14 are arranged outside the molding material 4 and are not poured by the molding material 4 . The model material 4 is polydimethylsiloxane or pol...

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Abstract

The invention relates to the technical field of oil detection for mechanical equipment, and provides a capacitance-reactance oil detection system which comprises a detection device, a measurement mode switching unit and an excitation-detection unit, wherein the detection device comprises a microfluidic chip and a sensing unit; the microfluidic chip consists of a microchannel inlet, a microchannel, a substrate, a model material and a microchannel outlet; the sensing unit consists of two single-layer coils which are oppositely arranged on the two sides of the microchannel; the measurement mode switching unit is used for switching different measurement modes by changing different connection manners for four lead ends of the two single-layer coils; the excitation-detection unit is used for exciting the two single-layer coils with high-frequency alternating current to enable the two single-layer coils to serve as a capacitance detection device as well as an inductance-resistance detection device. By the chip, multiple parameters such as capacitance, inductance and resistance are measured by virtue of the same sensing unit, multiple particulate pollutants in oil can be discriminately detected, and a failure of mechanical equipment can further be diagnosed.

Description

technical field [0001] The invention relates to the field of failure detection of equipment oil systems, in particular to a capacitive reactance oil detection system for detecting particle pollutants in oil and a manufacturing method thereof. Background technique [0002] Particle pollutants in oil are the most important cause of hydraulic system failures. Being able to detect information about particle pollutants in oil is a reliable solution for fault diagnosis of equipment systems. At present, the methods for detecting oil particle pollutants mainly include optical detection methods, acoustic detection methods, inductive detection methods, and capacitive detection methods. Among them, the optical detection method has high detection accuracy, but it cannot distinguish the properties of particle pollutants, and is limited by the influence of oil transmittance. The acoustic detection method is to detect the particles in the oil by detecting the reflected sound wave, which i...

Claims

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Application Information

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IPC IPC(8): G01N27/24
CPCG01N27/24
Inventor 张洪朋曾霖孙玉清陈海泉
Owner DALIAN MARITIME UNIVERSITY
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