SBIR Phase I: On-Line Measurement of Particle Size Distributions Using Photon Migration

*9761330雷诺这个小型企业创新研究第一阶段项目将开发一种基于光子迁移原理的自校准光学传感器，用于在线测量颗粒和分散相过程中颗粒或液滴的尺寸分布和体积分数。它建议建造一个用于工业环境的原型仪器。这种新的方法包括监测光在高固相过程流中倍增散射时随时间变化的传播特性。该技术不需要外部校准或经验得出的校准系数。论证了该技术的可行性。而颗粒物过程占美国的70%到80%。在以化工为基础的工业中，无法在线测量浓缩流程中的颗粒大小和体积分数等关键工艺参数，从而实现控制和有效优化。光子迁移技术在乳液加工(包括聚合)、结晶、陶瓷加工和生物技术方面具有直接的工业应用。***

*** 9761330 Reynolds This Small Business Innovation Research Phase I project will develop a self-calibrating optical sensor based on principles of photon migration for on-line measurements of particle or droplet size distributions and volume fraction for particulate and dispersed phase processes. It proposes to build a prototype instrument for use in an industrial setting. The novel approach consists of monitoring the time-dependent propagation characteristics of light as it multiply scatters through a process stream of high solids. The technique does not require external calibration or empirically derived calibration factors. Feasibility of this technology has been demonstrated. While particulate processes comprise seventy to eighty percent of the US. chemical-based industry, no on-line measurements are available for the critical process parameters of particle size and volume fraction in concentrated process streams to enable control and effective optimization. The photon migration technique has immediate industrial applications in emulsion processing (including polymerization), crystallization, ceramic processing, and biotechnology. ***