Online particle detection device and method based on microfluidic chip

Abstract

The invention discloses an online particle detection device and method based on a microfluidic chip. The online particle detection device comprises the microfluidic chip, a first impedance analyzer and a second impedance analyzer, wherein the microfluidic chip comprises a substrate part and a main chip body arranged on the substrate part; the main chip body comprises a first liquid inlet, a second liquid inlet, a first liquid outlet and a second liquid outlet formed in the substrate part, a particle separation region for separating ferromagnetic particles from non-ferromagnetic particles in oil liquid under the action of a magnetic field, a magnetic part placement region arranged on the substrate plate and located on one side of a first microchannel, a magnetic part placed on the magnetic part placement region and used for providing the magnetic field, and a particle detection region. The online particle detection device and method provided by the invention can realize the distinguishing and the online continuous counting of the ferromagnetic particles and the non-ferromagnetic particles in the oil liquid, and is suitable for online detection and analysis of oil liquid, in particular the detection and analysis of oil liquid on sailing ships.

Description

technical field [0001] The invention belongs to the technical field of oil detection, and specifically relates to a microfluidic chip-based particle on-line detection device and a detection method thereof. Background technique [0002] Oil monitoring technology is a way to obtain the lubrication information and wear status of the machine by analyzing the performance changes of the lubricant being used and the wear particles carried by the monitored machine, as well as to evaluate the machine condition and predict the failure, and determine The cause of the failure, the type of failure and the technology of the failed part. Machine status detection based on oil monitoring technology is one of the essential methods in modern industrial maintenance activities, and has considerable economic benefits. The detection technology for metal abrasive particles in oil has become the main content of oil monitoring technology. [0003] According to the different working principles of th...

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Problems solved by technology

However, the resistive online monitoring technology has the disadvantage of low sensitivity and cannot detect tiny particles.

[0008] It can be seen from the above that the oil on-line detection technology in the prior art has certain limitations and cannot be well adapted to the needs of high sensitivity and on-line oil detection

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