Fresnel Drag Flow Probe

菲涅尔拖流探头

• 批准号: 9408100
• 负责人: Henry Taylor
• 金额: $ 14.46万
• 依托单位: Texas A&M Engineering Experiment Station
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1995
• 资助国家: 美国
• 起止时间: 1995-09-15 至 2000-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9408100&HistoricalAwards=false
• 关键词: Fresnel; Drag; Flow; Probe

The objective of this program is to research, develop, and explore applications of a new type of optical flow sensor that can measure ultra-flow volumetric flow rates in real time with three orders of magnitude more sensitivity than the best commercially available mass flow meters (which use acoustic techniques). The performance of this new flow sensor is predicted to rival the best laser doppler velocimetric results in its linear velocity sensitivity. However, it directly measures volumetric flow rates instead of point particle velocities. In addition it should be a much cheaper technology. Such an instrument can find a wide range of applications in materials processing, medical instrumentation, and chemical measurement and analysis, both in terms of serving present needs and in being a new measurement tool for further research within these areas. In this program, we will apply the sensor to directly observe slow flows and diffusions associated with liquid chromatography systems. The sensor concept is based on the relativistic Fresnel drag effect which causes the speed of lig ht to differ between upstream and downstream directed beams. The difference in speed is linearly proportional to the flow velocity and can be measured with extreme sensitivity using a state-of-the-art fiber optics Sagnac interferometer.

该计划的目标是研究，开发和探索一种新型的光学流量传感器的应用，该传感器可以在真实的时间内测量超流量体积流量，其灵敏度比最好的商业质量流量计（使用声学技术）高三个数量级。 这种新的流量传感器的性能预计竞争最好的激光多普勒测速结果在其线速度的灵敏度。 然而，它直接测量体积流率而不是点粒子速度。 此外，它应该是一种更便宜的技术。 这种仪器可以在材料加工、医疗仪器和化学测量和分析中找到广泛的应用，既可以满足当前的需求，也可以成为这些领域进一步研究的新测量工具。 在这个程序中，我们将应用传感器直接观察与液相色谱系统相关的缓慢流动和扩散。 该传感器的概念是基于相对论菲涅尔阻力效应，导致上游和下游定向光束之间的光的速度不同。 速度差与流速成线性比例，并且可以使用最先进的光纤Sagnac干涉仪以极高的灵敏度进行测量。