Characterizing Motion with Ultrasound

用超声波表征运动

• 批准号: 8802627
• 负责人: Roman Kuc
• 金额: $ 26.49万
• 依托单位: Yale University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1988
• 资助国家: 美国
• 起止时间: 1988-07-01 至 1991-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8802627&HistoricalAwards=false
• 关键词: Characterizing; Motion; Ultrasound

Ultrasound is an emerging method employed for nondestructive evaluation. One potential advantage of ultrasound is that the motion of an object can be detected by observing the frequency shift of the returned signal. This research will seek to exploit this advantage by developing procedures to measure motion parameters with reflected ultrasound signals and by determining their limitations. A wide range of motion types are considered, from determining the motion parameters of a single moving point reflector through characterizing the motion of a collection of random reflectors. The procedures involve analysis, simulation and experiments. The fundamental limitations are due to the speed of sound, the limited size of the apertures, and the presence of noise. The impact of these limitations will be investigated by considering the placement of multiple transducers and novel signal processing procedures. This should allow translation of these physical limitations into bounds on the accuracy that can be applied to practical instruments. The result of this research will enhance the understanding of probing media with acoustic signals and determine the feasibility of a new generation of measuring instrumentation.

超声是一种新兴的无损检测方法， 评价 超声波的一个潜在优势是， 可以通过观察物体的频率偏移来检测物体的位置。 返回信号 本研究将寻求利用这一优势， 开发程序来测量运动参数， 超声波信号，并确定其局限性。 广泛 的运动类型，从确定运动参数 通过描述运动， 随机反射体的集合。 这些程序包括 分析、仿真和实验。 基本的限制是 由于声速、孔径的有限尺寸以及 噪音的存在。 这些限制的影响将是 通过考虑多个换能器的放置进行研究， 新颖的信号处理程序。 这应该允许翻译 将这些物理限制转化为精确度的界限， 应用于实用工具。 这项研究的结果将 增强对利用声信号探测介质的理解， 确定新一代测量的可行性 仪器仪表