Acoustic Measurement of Suspended Particle Concentration

悬浮颗粒浓度的声学测量

• 批准号: 9977338
• 负责人: Brian Barkdoll
• 金额: $ 6.67万
• 依托单位: University of Mississippi
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1999
• 资助国家: 美国
• 起止时间: 1999-08-15 至 2001-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9977338&HistoricalAwards=false
• 关键词: Acoustic; Measurement; Suspended; Particle; Concentration

AbstractCTS-9977338B.D. Barkdoll, U. of MississippiThe objective is to systematically verify the principle of operation of a back scattering acoustic sensor for sediment transport. By using multiple sound frequencies one may obtain information on both concentration and particle size, for various penetration distances up to the order of several meters. The expected spatial (about 1 cm) and temporal (about 0.1 seconds) resolutions are suitable for sediment transport studies in channels and rivers. The investigation will be performed both in laboratory and field settings. Measurements with isokinetic probes and other sampling techniques will be used as reference data to calibrate the new device in the suspension streams. The project will provide student support in the University of Mississippi for performing the tests in collaboration with the Department of Agriculture National Sediment Laboratory, and National Center for Physical Acoustics. It will strengthen the infrastructure in the university with immediate use in other research projects. The project has a strong educational component. If successful, it will contribute to the development of a nonintrusive instrument to monitor suspended particulate matter in channels and rivers, and will contribute to infrastructure development in the University.

美国密西西比州巴克多尔大学的CTS-9977338B.D.目的是系统地验证用于泥沙运动的后向散射声传感器的工作原理。通过使用多个声音频率，人们可以获得关于浓度和颗粒大小的信息，对于不同的穿透距离，最高可达几米。空间分辨率(约1 cm)和时间分辨率(约0.1秒)适用于河道和河流泥沙输移研究。调查将在实验室和现场两个环境中进行。使用等速探头和其他采样技术的测量将被用作参考数据，以在悬浮流中校准新设备。该项目将为密西西比大学的学生提供支持，帮助他们与农业部国家沉积物实验室和国家物理声学中心合作进行测试。它将加强大学的基础设施，并立即用于其他研究项目。该项目有很强的教育成分。如果成功，它将有助于开发一种非侵入性仪器，监测河道和河流中的悬浮颗粒物，并将有助于大学的基础设施发展。