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Measurement of fluid flow rate using nanocomposite silicone rubber sensor
Flow Measurement and Instrumentation ( IF 2.3 ) Pub Date : 2021-01-15 , DOI: 10.1016/j.flowmeasinst.2020.101885
Fahad Al mufadi

This paper describes the use of an elastic nanocomposite sensor to measure the water flow rate in open and closed hydraulic circuits. A sensor was constructed of multiwalled carbon nanotubes (MWCNTs) dispersed in silicone rubber (SR) and subsequently tested to verify its ability to measure water flow rate. The results reveal that the correlation between the fluid flow rate and the pressure variation across the sensor entails that its electrical resistance can be correlated to the flow rate. The sensor constructed of 2 and 3 wt,% of MWCNTs in SR-based nanocomposite sensors exhibited a low percolation threshold. An electron microscope (HRSEM) was used to characterize the manufactured nanocomposite sensors and confirm the conductive networks. The variation in the electrical resistance of the sensor in terms of both water pressure and flow rate is described. The elastic sensor was calibrated to measure the water flow rate in the range of 0–35 l/min. The results show that an elastic sensor fabricated from MWCNTs dispersed in silicone rubber does exhibit sensitivity to the slight strain levels produced by dynamic water pressure and, as such, can be used to measure flow rate. In addition, the sensor's response to water flow in the presence of bubbles enables pump cavitation monitoring. This paper also investigates the reduction of sensor electrical conductivity in response to water immersion. The findings reveal that the elastic nanocomposite sensor could potentially be used as a liquid sensor to detect water leakage in hydraulic circuits.



中文翻译:

使用纳米复合硅橡胶传感器测量流体流速

本文介绍了使用弹性纳米复合材料传感器来测量开式和闭式液压回路中的水流量。传感器由分散在硅橡胶(SR)中的多壁碳纳米管(MWCNT)构成,并随后经过测试以验证其测量水流量的能力。结果表明,流体流速与传感器两端的压力变化之间的相关性要求其电阻可以与流速相关。在基于SR的纳米复合传感器中,由2%和3 wt%的MWCNT构成的传感器表现出较低的渗透阈值。电子显微镜(HRSEM)用于表征制造的纳米复合材料传感器并确认导电网络。描述了传感器电阻在水压和流量方面的变化。校准了弹性传感器,以测量0至35 l / min范围内的水流速。结果表明,由分散在硅橡胶中的MWCNT制成的弹性传感器确实显示出对由动态水压产生的轻微应变水平的敏感性,因此可以用于测量流量。此外,传感器在有气泡的情况下对水流的响应使泵的气穴监测成为可能。本文还研究了浸入水中后传感器电导率的降低。研究结果表明,弹性纳米复合材料传感器可以潜在地用作检测液压回路中漏水的液体传感器。校准了弹性传感器,以测量0至35 l / min范围内的水流速。结果表明,由分散在硅橡胶中的多壁碳纳米管制成的弹性传感器确实显示出对由动态水压产生的轻微应变水平的敏感性,因此可用于测量流速。此外,传感器在有气泡的情况下对水流的响应使泵的气穴监测成为可能。本文还研究了浸入水中后传感器电导率的降低。研究结果表明,弹性纳米复合材料传感器可以潜在地用作检测液压回路中漏水的液体传感器。校准了弹性传感器,以测量0至35 l / min范围内的水流速。结果表明,由分散在硅橡胶中的MWCNT制成的弹性传感器确实显示出对由动态水压产生的轻微应变水平的敏感性,因此可以用于测量流量。此外,传感器在有气泡的情况下对水流的响应可以监测泵的气穴现象。本文还研究了浸入水中后传感器电导率的降低。研究结果表明,弹性纳米复合材料传感器可以潜在地用作检测液压回路中漏水的液体传感器。结果表明,由分散在硅橡胶中的MWCNT制成的弹性传感器确实显示出对由动态水压产生的轻微应变水平的敏感性,因此可以用于测量流量。此外,传感器在有气泡的情况下对水流的响应使泵的气穴监测成为可能。本文还研究了浸入水中后传感器电导率的降低。研究结果表明,弹性纳米复合材料传感器可以潜在地用作检测液压回路中漏水的液体传感器。结果表明,由分散在硅橡胶中的多壁碳纳米管制成的弹性传感器确实显示出对由动态水压产生的轻微应变水平的敏感性,因此可用于测量流速。此外,传感器在有气泡的情况下对水流的响应使泵的气穴监测成为可能。本文还研究了浸入水中后传感器电导率的降低。研究结果表明,弹性纳米复合材料传感器可以潜在地用作检测液压回路中漏水的液体传感器。本文还研究了浸入水中后传感器电导率的降低。研究结果表明,弹性纳米复合材料传感器可以潜在地用作检测液压回路中漏水的液体传感器。本文还研究了浸入水中后传感器电导率的降低。研究结果表明,弹性纳米复合材料传感器可以潜在地用作检测液压回路中漏水的液体传感器。

更新日期:2021-01-22
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