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微流控芯片上油液磨粒电容检测

, PP. 42-46

Keywords: 微流控芯片,电容传感器,磨粒检测

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Abstract:

报道一种可用来检测和计数油液中磨粒个数的微流控芯片实验室装置(microfluidiclabonchip).使用直径为25μm铜丝作为电极,在PDMS微流控芯片上加工获得三维电容传感器,油液样品在微流控芯片上由注射泵驱动通过传感器.金属磨粒与油液介电常数不同,每一个通过电容传感器的磨粒均会产生电容脉冲信号,脉冲信号幅值反映了磨粒大小,而脉冲个数即为磨粒数量,实现了最小粒径为8μm的铝磨粒的检测和计数.该油液磨粒检测装置具有结构简单、成本低、检测精度高等优点,有望应用于远洋船舶的油液离线分析.

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