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设计一种基于电感检测原理实现金属颗粒区分检测的微流体计数芯片.应用电磁学理论对检测机理进行研究,得出该芯片输出信号与颗粒几何特性以及芯片几何特性的关系式,并用该关系式对该芯片的精度进行详细分析.对100μm铁质颗粒以及150μm铜质颗粒在不同流动状态下电感峰值变化量与数值计算进行验证对比.结果表明,曲线符合度良好.该方式对颗粒检测以及区分可行并验证该理论基本正确,为进一步开发高精度微流体油液检测芯片提供了理论支持.
A microfluidic counting chip based on the principle of inductive detection is designed to detect the metal particles.The electromagnetism theory is used to study the detection mechanism and the relationship between the output signal of the chip and the geometrical characteristics of the particles and the geometrical characteristics of the chip is obtained. The accuracy of the chip is analyzed in detail.Variation of the peak change of the inductance and the numerical calculation of 100μm iron particles and 150μm copper particles in different flow conditions are verified and compared.The results show that the curve is in good agreement.The method detects the particles and distinguishes It is feasible and validated that the theory is basically correct, which provides theoretical support for the further development of high-precision microfluidic fluid detection chips.