SBIR Phase I: Shear Stress Sensor Based on Optical Micro-Spring Technology

SBIR第一期：基于光学微弹簧技术的剪切应力传感器

• 批准号: 0839528
• 负责人: Vadim Stepaniuk
• 金额: $ 10万
• 依托单位: Lenterra Inc
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2009
• 资助国家: 美国
• 起止时间: 2009-01-01 至 2009-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0839528&HistoricalAwards=false
• 关键词: SBIR; Phase; Shear; Stress; Sensor

This Small Business Innovation Research Phase I project is aimed at the development of a wall shear stress sensor with an Optical Micro-Spring (OMS) as its core element. The OMS, a miniature fiber-based load cell, relies on the morphology-dependent optical resonances known as Whispering Gallery Modes (WGM) realized in a microcavity. A miniature and robust sensor is proposed that is capable of direct measurement of wall shear stress in either transparent or opaque media. Due to high quality factor of WGM technology, displacements of the sensing element as small as a hundredth of a nanometer can be detected. The sensor therefore virtually does not have any moving parts while detecting sensing element displacements within more than four orders of magnitude of the shear force. The project will advance the understanding of the fundamental processes occurring in the boundary layer of a flow. For non-Newtonian or otherwise rheologically complex fluids the wall shear stress can not be easily calculated or, especially for non-transparent flows, measured. The chemical and pharmaceutical industries suffer from an inability to scale and predict mixing equipment performance. Direct measurements of wall shear stress would significantly improve existing CFD models and provide a means to increase process control, quality and throughput for high intensity mixing devices and to reduce the cost of the final product.

这个小型企业创新研究阶段I项目旨在以光学微弹簧（OMS）为核心元素开发墙壁剪切应力传感器。 OMS是一种基于微型纤维的负载电池，依赖于形态依赖性的光学共振，称为低语库模式（WGM）。提出了一个微型传感器和稳健的传感器，该传感器能够直接测量透明或不透明介质中的壁剪应力。由于WGM技术的高质量系数，可以检测到一百分之一的纳米表的传感元件的位移。因此，传感器实际上没有任何运动部件，同时检测超过四个数量级的传感元件位移。该项目将提高对流动边界层中发生的基本过程的理解。对于非牛顿或其他流变学复杂的流体，无法轻易计算壁剪应力，尤其是对于非透明流量的测量。化学和制药行业无法扩展和预测混合设备的性能。直接测量墙壁剪切应力将显着改善现有的CFD模型，并为高强度混合设备的过程控制，质量和吞吐量提供一种方法，并降低最终产品的成本。