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MRI: Development of an Intensified KHz Rate Plenoptic Camera System for 3D Flow Diagnostics

MRI：开发用于 3D 血流诊断的增强型 KHz 速率全光相机系统

基本信息

批准号：
1725929
负责人：
Brian Thurow
金额：
$ 110.53万
依托单位：
Auburn University
依托单位国家：
美国
项目类别：
Standard Grant
财政年份：
2017
资助国家：
美国
起止时间：
2017-09-15 至 2022-08-31
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=1725929&HistoricalAwards=false
关键词：
MRI Development Intensified KHz Rate

项目摘要

From blood flow through artificial heart valves to mixing and combustion of fuel and air in a modern jet engine, many flows are both unsteady and three-dimensional. Modern diagnostics used to study, test and evaluate these flow fields, however, are slow and two-dimensional or, in the case of multi-camera 3D diagnostics, expensive and complex. In this project, the research team will develop a new imaging system capable of making high-speed 3D measurements in practical flow fields using only a single camera. The developed system will be significantly cheaper, more compact, and easier to set up than complex multi-camera systems, thus providing researchers around the world with an accessible and affordable tool to make high-speed 3D flow measurements. This imaging system will be used to understand cardio- and cerebro-vascular flows, advance high speed vehicle design research, and improve combustion efficiency in engines and combustion systems for power generation. In addition, the technology developed here will be openly shared with the broader research community to ensure access for students and researchers across the U.S. government agencies and industries. Such wide distribution ensures that the developed system impacts the widest possible range of applications involving unsteady, 3D fluid flows.The basis for this diagnostic is an intensified plenoptic imaging system capable of measuring 3D scalar and velocity fields at framing rates in excess of 1,000 frames per second. The system consists of three essential elements: (1) a kHz rate intensified plenoptic camera and illumination source optimized for 3D flow measurements; (2) image reconstruction and velocity estimation algorithms to render volumetric images and estimate velocity fields; and (3) a computing platform that processes the data in an acceptable time frame. The development of this system will enable time-resolved, 3D flow measurements, including particle image velocimetry, chemiluminiscence imaging, laser induced fluorescence, and background oriented Schlieren imaging. The proposed instrument is based on a low frame-rate prototype built by investigators at Auburn University that has been demonstrated as a simple, compact, robust and effective 3D imaging system. The modularity of the system will allow the system to be optimized for different facilities and techniques, including stereo-plenoptic diagnostics with the potential to dramatically improve spatial resolution of volumetric measurements.

从血液流过人工心脏瓣膜到现代喷气发动机中燃料和空气的混合和燃烧，许多流动都是非定常和三维的。然而，用于研究、测试和评估这些流场的现代诊断是缓慢且二维的，或者在多相机3D诊断的情况下是昂贵且复杂的。在该项目中，研究小组将开发一种新的成像系统，该系统能够仅使用一台相机在实际流场中进行高速3D测量。与复杂的多相机系统相比，开发的系统将显着便宜、更紧凑且更容易设置，从而为世界各地的研究人员提供一种易于使用且价格实惠的工具来进行高速3D流量测量。该成像系统将用于了解心血管和心血管流动，推进高速车辆设计研究，并提高发动机和发电燃烧系统的燃烧效率。此外，这里开发的技术将与更广泛的研究社区公开共享，以确保美国政府机构和行业的学生和研究人员能够访问。这种广泛的分布确保了所开发的系统影响最广泛的应用范围，包括不稳定的3D流体flow.The诊断的基础是一个增强的全光成像系统，能够测量3D标量和速度场，帧速率超过每秒1,000帧。该系统由三个基本要素组成：（1）kHz速率增强全光相机和照明源，针对3D流动测量进行了优化;（2）图像重建和速度估计算法，以渲染体积图像并估计速度场;以及（3）计算平台，在可接受的时间范围内处理数据。该系统的发展将使时间分辨，三维流动测量，包括粒子图像测速，荧光成像，激光诱导荧光，和背景导向纹影成像。拟议的仪器是基于一个低帧速率原型建立的研究人员在奥本大学，已被证明是一个简单，紧凑，强大和有效的三维成像系统。该系统的模块化将允许该系统针对不同的设施和技术进行优化，包括立体全光诊断，具有显著提高体积测量的空间分辨率的潜力。