基于平行四边形柔性铰链的新型微量液体粘度测量方法
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摘要
在分析化学、生物工程、流量计量等领域,微量液体的粘度对工程分析和计算具有重要意义,微量液体粘度测量的方法也在逐渐发展完善。查阅资料发现,目前微量液体测量装置可用于测量粘度值低于150 m Pa·s的微量液体。为了解决微量液体测量装置的粘度测量范围较小的问题,提出一种基于平行四边形柔性铰链的剪切运动的新型粘度测量方法,待测微量液体样本的体积仅为15μL。该方法使用固定在平行四边形柔性铰链上的刚性杆,将刚性杆的探针部分插入液体,在瞬态力的作用下,平行四边形柔性铰链做一维的阻尼振动,带动探针在液体中做剪切运动,由于液体粘滞力,系统的阻尼因数发生变化,液体粘度越大,阻尼因数越大。可以通过标定实验建立二者的关系,实现微量液体的粘度测量。结果表明,此微量液体粘度测量装置的测量范围扩大到了10 m Pa·s～750 m Pa·s,并且相对误差平均为5.8%。证明了该测量装置满足设计的需求,并且能够有效测量微量液体粘度。
In the field of analytical chemistry,bio-engineering,flow metering and etc,the viscosity of small-volume samples is of great significance for engineering analysis and calculation. The methods of viscosity measurement for small-volume samples are gradually developed in these years. The methods are used to measure viscosity values for small-volume liquids lower than 150 m Pa·s. In this paper,a novel viscosity measurement method requiring sample volumes less than 15 μL based on the parallelogram flexible hinge is designed to increase the measurement range. A rigid rod combined with a parallelogram flexible hinge is used to measure the viscosity in this method. One-dimensional damping vibration under the action of transient force is performed. Due to the viscous force of the liquid,the damping factor of the system changes. The greater the viscosity of the liquid,the larger the damping factor becomes.The relationship between them can be established by the calibration experiments. The results showed that the range of the viscosity measurement is 10 m Pa·s ～ 750 m Pa·s and the average of the relative error is 5.8%. The method of the shear motion of the cantilever could be developed into a novel viscosity measurement apparatus for a small-volume liquid.
In the field of analytical chemistry,bio-engineering,flow metering and etc,the viscosity of small-volume samples is of great significance for engineering analysis and calculation. The methods of viscosity measurement for small-volume samples are gradually developed in these years. The methods are used to measure viscosity values for small-volume liquids lower than 150 m Pa·s. In this paper,a novel viscosity measurement method requiring sample volumes less than 15 μL based on the parallelogram flexible hinge is designed to increase the measurement range. A rigid rod combined with a parallelogram flexible hinge is used to measure the viscosity in this method. One-dimensional damping vibration under the action of transient force is performed. Due to the viscous force of the liquid,the damping factor of the system changes. The greater the viscosity of the liquid,the larger the damping factor becomes.The relationship between them can be established by the calibration experiments. The results showed that the range of the viscosity measurement is 10 m Pa·s ～ 750 m Pa·s and the average of the relative error is 5.8%. The method of the shear motion of the cantilever could be developed into a novel viscosity measurement apparatus for a small-volume liquid.
引文
[1]陈曦.基于光纤光栅的液体粘度在线测量方法的研究[D].天津:天津大学,2017.
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[7] Cerimovic S,Beigelbeck R,Antlinger H,et al. Sensing Viscosity and Density of Glycerol-Water Mixtures Utilizing a Suspended Plate MEMS Resonator[J]. Microsystem Technologies,2012,18(7-8):1045-1056.
[8] Eris G,Bozkurt A A,Sunol A,et al. Determination of Viscosity and Density of Fluids Using Frequency Response of Microcantilevers[C]//European Meeting on Supercritical Fluids. 2015:3372-3378.
[9] Bircher B A,Duempelmann L,Renggli K,et al. Real-Time Viscosity and Mass Density Sensors Requiring Microliter Sample Volume Based on Nanomechanical Resonators[J]. Analytical Chemistry,2013,85(18):8676-8683.
[10] Ma J,Huang X,Bae H,et al. Liquid Viscosity Measurement Using a Vibrating Flexure Hinged Structure and a Fiber-Optic Sensor[J].IEEE Sensors Journal,2016,16(13):5249-5258.
[11]刘聪,赵美蓉,马金玉.基于柔性铰链的液体粘度测量方法研究[J].传感技术学报,2015,28(3):310-314.
[12]陈惠钊.粘度测量[M].北京:中国计量出版社,1994:117-122.
[13]郭子成,罗青枝.润湿现象和毛细现象的热力学描述[J].大学物理,2000,19(6):19-21.
[14]赵留鹏,张树永.毛细上升公式的推导方法及其在方形毛细管中的应用[J].大学化学,2016,31(11):83-88.
[15]费业泰.误差理论与数据处理[M].北京:机械工业出版社,2015.
[2] Doy N,Mchale G,Newton M I,et al. Small Volume Laboratory on a Chip Measurements Incorporating the Quartz Crystal Microbalance to Measure the Viscosity-Density Product of Room Temperature Ionic Liquids[J]. Biomicrofluidics,2010,4(1):6.
[3] Tr9ls A,Clara S,Jakoby B. A Low-Cost Viscosity Sensor Based on Electrowetting on Dielectrics(EWOD)Forces[J]. Sensors&Actuators A Physical,2016,244:261-269.
[4] Hwang D S,Zeng H,Srivastava A,et al. Viscosity and Interfacial Properties in a Mussel-Inspired Adhesive Coacervate[J]. Soft Matter,2010,6(14):3232.
[5] Mcloughlin N,Lee S L,Hahner G. Simultaneous Determination of Density and Viscosity of Liquids Based on Resonance Curves of Uncalibrated Microcantilevers[J]. Applied Physics Letters,2006,89(18):3429-64.
[6] Youssry M,Belmiloud N,Caillard B,et al. A Straightforward Determination of Fluid Viscosity and Density Using Microcantilevers:From Experimental Data to Analytical Expressions[J]. Sensors&Actuators A Physical,2011,172(1):40-46.
[7] Cerimovic S,Beigelbeck R,Antlinger H,et al. Sensing Viscosity and Density of Glycerol-Water Mixtures Utilizing a Suspended Plate MEMS Resonator[J]. Microsystem Technologies,2012,18(7-8):1045-1056.
[8] Eris G,Bozkurt A A,Sunol A,et al. Determination of Viscosity and Density of Fluids Using Frequency Response of Microcantilevers[C]//European Meeting on Supercritical Fluids. 2015:3372-3378.
[9] Bircher B A,Duempelmann L,Renggli K,et al. Real-Time Viscosity and Mass Density Sensors Requiring Microliter Sample Volume Based on Nanomechanical Resonators[J]. Analytical Chemistry,2013,85(18):8676-8683.
[10] Ma J,Huang X,Bae H,et al. Liquid Viscosity Measurement Using a Vibrating Flexure Hinged Structure and a Fiber-Optic Sensor[J].IEEE Sensors Journal,2016,16(13):5249-5258.
[11]刘聪,赵美蓉,马金玉.基于柔性铰链的液体粘度测量方法研究[J].传感技术学报,2015,28(3):310-314.
[12]陈惠钊.粘度测量[M].北京:中国计量出版社,1994:117-122.
[13]郭子成,罗青枝.润湿现象和毛细现象的热力学描述[J].大学物理,2000,19(6):19-21.
[14]赵留鹏,张树永.毛细上升公式的推导方法及其在方形毛细管中的应用[J].大学化学,2016,31(11):83-88.
[15]费业泰.误差理论与数据处理[M].北京:机械工业出版社,2015.