MRI-R2: Acquisition of a Scanning Laser Doppler Vibrometer System

MRI-R2：获取扫描激光多普勒测振仪系统

• 批准号: 0959858
• 负责人: Thomas Huber
• 金额: $ 31万
• 依托单位: Gustavus Adolphus College
• 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: 2010-02-01 至 2013-09-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0959858&HistoricalAwards=false
• 关键词: MRI; R2; Acquisition; Scanning; Laser

This award is funded under the American Recovery and Reinvestment Act of 2009 (Public Law 111-5).This project will acquire a scanning vibrometer for a multi-disciplinary research program. A vibrometer uses the Doppler shift of a reflected laser beam to measure the vibration of objects without contact. In this project, the vibrometer will be used to investigate the ultrasound radiation force excitation technique; this technique uses the interference between two ultrasound sources to vibrate macroscopic and microscopic objects without contact. The other major goal of the project is to use the scanning vibrometer for research in musical acoustics. To produce their characteristic tones, musical instruments are sophisticated systems that often involve nonlinear oscillators, coupled to complex resonant structures. The project will enable a more thorough understanding of how these musical instruments work. Undergraduate students will be involved in all aspects of the research. Measurements obtained using the vibrometer will lead to a better understanding of the unique capabilities available using ultrasound radiation force excitation of microcantilevers. This may impact areas that rely on the vibration of microcantilevers, including ultras-sensitive mass detection and atomic force microscopy. The musical acoustic studies will have an impact because of the close collaboration between academic researchers and actual instrument builders. Undergraduate students will have the opportunity to collaborate with well-known researchers who will have remote access to the scanning vibrometer through Gustavus? cyber-enabled acoustics lab. Students and the general public will benefit from classroom demonstrations in acoustics and oscillations that use the scanning vibrometer via the cyber-enabled lab or web. Results will be disseminated widely in presentations, publications, and via a web site.

该奖项由 2009 年美国复苏和再投资法案（公法 111-5）资助。该项目将购买一台用于多学科研究项目的扫描振动计。振动计利用反射激光束的多普勒频移来测量物体的振动，无需接触。在该项目中，振动计将用于研究超声辐射力激励技术；该技术利用两个超声波源之间的干扰，以非接触方式振动宏观和微观物体。该项目的另一个主要目标是使用扫描振动计进行音乐声学研究。为了产生其特有的音调，乐器是复杂的系统，通常涉及非线性振荡器，并与复杂的谐振结构耦合。该项目将使人们更深入地了解这些乐器的工作原理。本科生将参与研究的各个方面。使用振动计获得的测量结果将有助于更好地了解使用微悬臂梁的超声辐射力激励所提供的独特功能。这可能会影响依赖微悬臂梁振动的领域，包括超灵敏质量检测和原子力显微镜。由于学术研究人员和实际乐器制造商之间的密切合作，音乐声学研究将产生影响。本科生将有机会与知名研究人员合作，他们将通过 Gustavus? 远程访问扫描测振仪？网络声学实验室。学生和公众将受益于通过网络实验室或网络使用扫描振动计进行的声学和振动课堂演示。结果将通过演示文稿、出版物和网站广泛传播。