基于微流控谐振式芯片的金属颗粒检测

发布时间：2018-01-30 03:45

本文关键词： 金属颗粒检测微流控芯片谐振电路信噪比　出处：《电子测量与仪器学报》2017年10期 　论文类型：期刊论文

【摘要】：液压系统中大部分的异常磨损是液压油中的金属颗粒造成的。通过检测这些金属颗粒可以及时预测故障并减少损失。由此设计了一种简单有效的液压油微小金属颗粒快速检测系统。基于LC谐振的原理进行金属颗粒检测,通过理论分析了检测的可行性;设计并制作了微流控检测芯片,芯片的流道为300μm;在所搭建的检测系统上进行了金属颗粒计数检测。实验结果表明,在所有参数一致以及颗粒相同的情况下,谐振式芯片的颗粒检测的信噪比优于单线圈式检测芯片的信噪比。当激励频率高于谐振频率时,铁磁性颗粒通过检测区域输出信号的脉冲向上,当激励频率低于谐振频率时,铁磁性颗粒通过检测区域输出信号的脉冲向下,非铁磁性金属颗粒则相反。所设计的微流控检测芯片及其检测系统可实现金属颗粒的区分检测,在实验室条件下,最小可对50μm的铁颗粒和110μm的铜颗粒进行区分检测。
[Abstract]:Most of the abnormal wear in hydraulic system is caused by the metal particles in the hydraulic oil. By detecting these metal particles, the failure can be predicted in time and the loss can be reduced. Therefore, a simple and effective micro metal of hydraulic oil is designed. Rapid particle detection system. Metal particle detection based on LC resonance principle. The feasibility of detection is analyzed theoretically. The microfluidic detection chip is designed and fabricated. The flow channel of the chip is 300 渭 m. The test results show that all the parameters are the same and the particles are the same. The SNR of the resonant chip is better than that of the single coil chip. When the excitation frequency is higher than the resonant frequency, the ferromagnetic particles output the pulse of the signal through the detection area. When the excitation frequency is lower than the resonant frequency, the ferromagnetic particles drop through the pulse of the output signal in the detection region. The non-ferromagnetic metal particle is the opposite. The microfluidic detection chip and its detection system can be used to distinguish the metal particles in laboratory conditions. At least 50 渭 m iron particles and 110 渭 m copper particles can be detected separately.
【作者单位】：大连海事大学轮机工程学院;
【基金】：国家自然科学基金(51679022) 中央高校基本科研业务费专项资金(3132017013)资助项目
【分类号】：TH137
【正文快照】： 0引言液压系统因其布置灵活、效率高、可实现无级变速等优点,在工业领域应用十分广泛。在船舶工程领域,液压系统可作为舵机、推进系统、起重机械等主要装置的重要组成部分。因此,对液压系统的保护显得尤为重要。液压油是液压系统的生命血液,超过75%的液压系统故障事由于液压油

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