Characteristics of double-coil resonant microfluidic chip for oil detection

ZENG Lin; ZHANG Hong-peng; YU Zi-lei; WU Yu

doi:10.3788/OPE.20172513.0144

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Characteristics of double-coil resonant microfluidic chip for oil detection

更新时间：2020-08-13

- Characteristics of double-coil resonant microfluidic chip for oil detection
- Optics and Precision Engineering Vol. 25, Issue 10s, Pages: 144-150(2017)
- 作者机构：
  
  大连海事大学轮机工程学院,辽宁大连,116026
- 作者简介：
- 基金信息：
- DOI：10.3788/OPE.20172513.0144
  CLC： TH934.4;TP212.1
- Received：02 June 2017，
  
  Revised：10 July 2017，
  
  Published：25 November 2017
- 稿件说明：
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曾霖, 张洪朋, 虞子雷等. 双线圈谐振式微流体油液检测芯片的检测特性[J]. 光学精密工程, 2017,25(10s): 144-150

ZENG Lin, ZHANG Hong-peng, YU Zi-lei etc. Characteristics of double-coil resonant microfluidic chip for oil detection[J]. Editorial Office of Optics and Precision Engineering, 2017,25(10s): 144-150
曾霖, 张洪朋, 虞子雷等. 双线圈谐振式微流体油液检测芯片的检测特性[J]. 光学精密工程, 2017,25(10s): 144-150 DOI： 10.3788/OPE.20172513.0144.

ZENG Lin, ZHANG Hong-peng, YU Zi-lei etc. Characteristics of double-coil resonant microfluidic chip for oil detection[J]. Editorial Office of Optics and Precision Engineering, 2017,25(10s): 144-150 DOI： 10.3788/OPE.20172513.0144.

摘要

为了实现对液压油中微小金属磨粒的高精度检测，设计并制作了双线圈谐振式微流体检测芯片。对该检测芯片的激励频率与电感变化关系以及金属磨粒检测效果进行研究。根据LC谐振原理，设计了双螺线管电感线圈与电容并联的单通道微流体检测芯片，并对其检测原理进行了理论分析；然后在该检测芯片的基础上搭建了油液金属磨粒检测系统；最后，对液压油中的铁颗粒和铜颗粒在不同激励频率下的电感变化特性进行实验研究，并在最优激励频率下进行检测实验。实验结果显示：在低于谐振频率时，铁颗粒产生正向电感变化脉冲而铜颗粒产生负向电感脉冲；高于谐振频率时，铁颗粒产生负向电感变化脉冲而铜颗粒产生正向电感脉冲。在接近谐振频率附近的检测效果达到最佳，此时双线圈谐振式芯片的检测效果要优于双线圈芯片，在实验中实现了10

m铁颗粒和50

m铜颗粒的检测。结果证明，检测芯片实现了液压油中金属磨粒的高精度检测，为液压系统机械故障的预防与诊断提供了技术支持。

Abstract

In order to realize the high precision detection of fine metal abrasive grains in hydraulic oil

a double-coil resonant microfluidic detection chip was designed and fabricated. The relationship between the excitation frequency and inductance change of the detection chip and the detection effect of metal abrasive grains were studied. First

according to the principle of LC resonance

a single-channel microfluidic detection chip with double solenoid inductor and capacitor in parallel was designed

and its detection principle was analyzed theoretically. Then based on the detection chip

the detection system formetal abrasive grain in oil wasset up. Finally

the experimental study on the inductance change of iron and copper particles in hydraulic oil at different excitation frequencies was carried out

and the detection experiment was carried out under the optimum excitation frequency. The experimental results show that when the frequency is lower than the resonant one

the iron particles produce positive inductance change pulse and the copper particles produce negative inductance pulse. When the frequency is higher than the resonant one

the iron particles produce negative inductance change pulse and the copper particles produce positive inductance pulse. When the frequency is close to the resonantone

the detection effect is the best. At this moment

the detection effect of double-coil resonant chip is better than that of the double coil chip

and the detection of 10

m iron particles and 50

m copper particles is realized in the experiment. The detection chip realizes the high precision detection of the metal abrasive grains in the hydraulic oil

and provides technical support for prevention and diagnosis of mechanical failure of the hydraulic system.

关键词

Keywords

references

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