Towards high resolution monitoring of water flow velocity using flat flexible thin mm-sized resistance-typed sensor film (MRSF)
Towards high resolution monitoring of water flow velocity using flat flexible thin mm-sized resistance-typed sensor film (MRSF)
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DOI：
10.1016/j.wroa.2019.100028
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发表时间：
2019-04
期刊：
影响因子：
7.5
通讯作者：
Zhiheng Xu;Yingzheng Fan;Tianbao Wang;Yuankai Huang;Farzaneh MahmoodPoor Dehkordy;Zheqin Dai;Lingling Xia;Qiuchen Dong;A. Bagtzoglou;J. McCutcheon;Yu Lei;Baikun Li
中科院分区：
文献类型：
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作者：
Zhiheng Xu;Yingzheng Fan;Tianbao Wang;Yuankai Huang;Farzaneh MahmoodPoor Dehkordy;Zheqin Dai;Lingling Xia;Qiuchen Dong;A. Bagtzoglou;J. McCutcheon;Yu Lei;Baikun Li
采用喷墨打印技术（IPT）制备了一种新型的柔性毫米薄电阻型传感器膜（MRSF），用于实时监测管道中水流的流速。MRSF的机理是在弹性聚酰亚胺薄膜上印刷银纳米粒子制成的毫米大小的交叉电极在不同流速下弯曲，导致传感器在不同曲率下的电阻发生变化。连续流动测试表明，MRSF具有较高的精度（0.2 m/s）和优良的灵敏度（0.1447/ms−1）。建立了传感器阻力与流速的模型，揭示了流体力学基本原理与传感器材料机械柔性之间的关系。在0.25-2 m/s流速范围内，MRSF阻力增量与流速平方的关系具有较高的决定系数（R2> 0.93）。此外，开发了一个温度校正模型来量化水温对传感器电阻读数的影响。在20-60 °C的水温范围内，MRSF表现出较低的温度电阻系数（TCR, 0.001）。利用有限元方法进行了计算流体动力学（CFD）仿真，验证了传感器膜在各种流量和材料条件下的潜在载荷假设和变形特性。使用MRSF技术进行高分辨率的水流量监测，预计可以为给定装置节省至少50%的能耗，特别是在流量波动的情况下。MRSF具有巨大的潜力，可以以超低的成本进行高精度的实时态势监测，从而实现高时空分辨率的反馈控制，从而降低水和废水系统的总体能耗。
Novel flexible thin mm-sized resistance-typed sensor film (MRSF) fabricated using ink-jet printing technology (IPT) was developed in this study to monitor water flow rate in pipelines in real timein situmode. The mechanism of MRSF is that the mm-sized interdigitated electrodes made by printing silver nanoparticles on an elastic polyimide film bend under different flow rates, leading to variation of the resistance of the sensor at different degrees of curvature. Continuous flow tests showed that MRSF possessed a high accuracy (0.2 m/s) and excellent sensitivity (0.1447/ms−1). A model of sensor resistance and flow velocity was established to unfold the correlation between the fundamentals of fluid mechanics and the mechanic flexibility of sensor materials. An analytical model yielded a high coefficient of determination (R2> 0.93) for the relationship between the resistance increment of the MRSF and the square of the flow velocity at the velocity range of 0.25–2 m/s. Furthermore, a temperature-correction model was developed to quantify the effect of water temperature on the sensor resistance readings. MRSF exhibited a low temperature coefficient of resistance (TCR, 0.001) at the water temperature range of 20–60 °C. Computational fluid dynamics (CFD) simulations using the finite element method were conducted and confirmed both the underlying load assumptions and the deformation characteristics of the sensor film under various flow and material conditions. High-resolution monitoring of water flow rate using MRSF technology was expected to save at least 50% energy consumption for a given unit, especially under flow fluctuation. MRSF possesses a great potential to perform real-timein situmonitoring at high accuracy with ultralow cost, thus enabling the feedback control at high spatiotemporal resolution to reduce the overall energy consumption in water and wastewater systems.