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

SBIR第二期：基于光学微弹簧技术的剪切应力传感器

• 批准号: 0956631
• 负责人: Vadim Stepaniuk
• 金额: $ 50万
• 依托单位: Lenterra Inc
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2010
• 资助国家: 美国
• 起止时间: 2010-04-01 至 2012-03-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0956631&HistoricalAwards=false
• 关键词: SBIR; Phase; II; Shear; Stress

This Small Business Innovation Research (SBIR) Phase II project is aimed at thedevelopment of a wall shear stress sensor based on micro-optical resonators. The core element of the sensor, the micro-optical stress gauge (MOSG), consists of a micro-optical spherical resonator and optical fibers through which tunable laser light is coupled into and out of the sphere. By monitoring shifts of the resonator spectrum, that are a function of the deformation of the sphere, forces can be measured over more than four orders of magnitude with minute deformation of the resonator ( 1 nm). This capability allows aMOSG to be incorporated within a shear stress sensor in which the motion of a floating element in contact with the fluid is minimal. In Phase I, a breadboard version of the sensor was fabricated and successfully tested in a model flow between two parallel plates, where measurements were in close agreement with computational predictions. Phase II research will focus on advancing the technology by improving measurement rate, sensitivity, and dynamic range, along with decreasing vibration susceptibility, andimproving robustness. Sensor prototypes will be tested on high shear industrial mixers with the aim of commercialization for the process mixing market.The broader impact/commercial potential of this project will include the advancement of the understanding of the fundamental processes occurring in boundary layers of flows. For non-Newtonian or otherwise rheologically complex fluids, wall shear stress cannot be reliably calculated or, especially for non-transparent flows, measured. The proposed sensor fills a need for shear stress measurement in the fields of fluid dynamics, aerodynamics and medical research. The largest impact is expected to be in the chemical and pharmaceutical industries that are suffering from an inability to scale and predict processing equipment performance. Knowledge of wall shear stress will provide means to improve process control, quality and throughput of products including drugs and other pharmaceutical products, foods, paints, inks and dyes, cosmetics, and many others.

该小型企业创新研究(SBIR)二期项目旨在开发一种基于微光学谐振器的壁面剪应力传感器。传感器的核心元件是微光学应力计(MOSG)，由微光学球面谐振器和光纤组成，可调谐激光通过光纤耦合到球面和球面。通过监测谐振器光谱的位移，这是球体变形的函数，可以在谐振器微小变形(1 Nm)的情况下测量超过四个数量级的力。这一能力允许将aMOSG集成到剪应力传感器中，其中与流体接触的浮动元件的运动最小。在第一阶段，制造了一个面包板版本的传感器，并在两个平行板之间的模型流中成功地进行了测试，其中测量结果与计算预测非常一致。第二阶段的研究将集中于通过提高测量速度、灵敏度和动态范围来推进技术进步，同时降低振动敏感性，并提高稳健性。传感器样机将在高剪切工业搅拌机上进行测试，目的是为过程混合市场实现商业化。该项目的更广泛影响/商业潜力将包括促进对流动边界层中发生的基本过程的理解。对于非牛顿流体或其他复杂的流体，无法可靠地计算或测量壁面剪应力，尤其是对于非透明流动。该传感器满足了流体力学、空气动力学和医学研究等领域对剪应力测量的需求。最大的影响预计将在化工和制药行业，这些行业正在遭受无法扩展和预测加工设备性能的影响。壁面剪切力的知识将提供改进过程控制、产品质量和产品产量的手段，包括药品和其他医药产品、食品、涂料、油墨和染料、化妆品等。