The understanding and precise prediction of fluid and solid displacement is of great interest in many technical applications. Density and viscosity are two key parameters that govern process mechanisms. The possibility to measure transient processes over longer distances is desirable. We present a novel distributed shear stress sensor that allows to derive fluid rheological parameters such as the viscosity along a fiber-optic cable being exposed to a moving medium. This works because flow velocity and fluid viscosity directly translate to a shear stress and consequently to a tensile strain on the fiber optic cable. Using the technology of fiber-optic distributed strain sensing, strain changes (and temperatures) are detected in real-time at any location along the fiber. Given the cable mechanical properties and geometry of the flow path, the strain translates to a shear stress which can be correlated to either the flow velocity or fluid viscosity. We derive a theoretical characterization of the sensor based on the principles of fluid mechanics. Also, we perform laboratory experiments with the sensor and demonstrate that we can distinguish differences of 1 mPa s dynamic viscosities in a range as low as 1 – 7 mPa s. In the next phase, we are implementing this sensor into a real working environment in a wellbore application to investigate the applicability of this novel sensor technology.

在许多技术应用中，对流体和固体位移的理解和精确预测具有极大的意义。密度和粘度是控制工艺机制的两个关键参数。需要在更长的距离上测量瞬态过程的可能性。我们提出了一种新颖的分布式剪切应力传感器，它允许导出流体流变参数，例如沿暴露于移动介质的光纤电缆的粘度。这是有效的，因为流速和流体粘度直接转化为剪切应力，从而转化为光缆上的拉伸应变。使用光纤分布式应变传感技术，可以在光纤的任何位置实时检测应变变化（和温度）。鉴于电缆的机械特性和流路的几何形状，应变转化为与流速或流体粘度相关的剪切应力。我们根据流体力学原理推导出传感器的理论特性。此外，我们使用传感器进行了实验室实验，并证明我们可以在低至 1 – 7 mPa s 的范围内区分 1 mPa s 动态粘度的差异。在下一阶段，我们将把这种传感器应用到井筒应用中的真实工作环境中，以研究这种新型传感器技术的适用性。我们使用传感器进行实验室实验，并证明我们可以在低至 1 – 7 mPa s 的范围内区分 1 mPa s 动态粘度的差异。在下一阶段，我们将把这种传感器应用到井筒应用中的真实工作环境中，以研究这种新型传感器技术的适用性。我们使用传感器进行实验室实验，并证明我们可以在低至 1 – 7 mPa s 的范围内区分 1 mPa s 动态粘度的差异。在下一阶段，我们将把这种传感器应用到井筒应用中的真实工作环境中，以研究这种新型传感器技术的适用性。