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A new technique for measuring viscosity of liquid with pico-liter volume based on Doppler shift by photothermal effects

机译:基于光热效应的多普勒频移测量皮升液体粘度的新技术

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摘要

This paper proposes a new technique for quickly measuring the viscosity of liquid with pico-liter volume based on Doppler shift by elastic wave in liquid induced by periodical photothermal expansion. Our sensing head for the sample liquids is composed of two spherical lensed fibers so that the volume of the sample liquid is no more than the order of pico-liter. The time resolved frequency of the Doppler shift is measured, and the viscosity is estimated from the shape of the curve. The experimental result was demonstrated, and the estimation of the “relative viscosity” by using a seismic system is attempted.
机译:本文提出了一种新技术,该技术可以基于周期性光热膨胀引起的弹性波在多普勒频移的基础上快速测量皮升/升的液体粘度。我们的样品液传感头由两条球形透镜纤维组成,因此样品液的体积不超过皮升的数量级。测量多普勒频移的时间分辨频率,并根据曲线的形状估算粘度。实验结果证明了这一点,并尝试通过地震系统估算“相对粘度”。

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