MRI: Acquisition of an Acoustical Measurement System for Structural Health Monitoring Research and Teaching at the University of Maryland Eastern Shore

该主要研究仪器（MRI）奖为声学测量系统的采购提供资金。测量系统的收购使马里兰州东海岸环境变化的结构健康监测的新计划成为可能。利用导声波在棒材、板材、管材等固体材料中长距离传播，促进了结构健康监测的研究。具体的研究目标包括：(1)研究一种以钢管或钢筋为通信信道的逆时兰姆波通信系统；(2)基于应变传感器Hopkinson杆试验的材料应力行为评估新方法的研究；(3)开发利用集成信号处理和机器学习技术提取无基线和依赖基线缺陷特征的新方法。该设备将支持的项目将有助于了解当地土木结构的特点和针对东海岸沿海环境的SHM系统的新设计。如果获得成功，该设备的收购将使马里兰大学东岸（UMES）能够促进一个新的项目，以解决东岸地区面临的重大老化基础设施问题，但更广泛的是全国。它将提高学生研究和教学的质量，并为教师提供必要的工具，以开展他们目前无法获得的研究方面。每年将有两名本科生接受高强度的仪器操作训练。此外，使用该设备的实验室项目将被纳入几个高级本科课程和高级设计顶点项目，每年至少影响30名学生。该仪器还将加强与索尔兹伯里大学和诺斯罗普·格鲁曼公司技术服务设施的合作，该技术服务设施也位于马里兰州东海岸。

This Major Research Instrumentation (MRI) award provides funding for the acquisition of an acoustical measurement system. The acquisition of the measurement system enables a new program for structural health monitoring for environmental changes on Maryland's Eastern Shore. It facilitates research of structural health monitoring using guided acoustic waves that can propagate a long distance in solid materials such as bars, plates and pipes. Specific research objectives include: (1) investigation of a time reversal Lamb wave communication system using steel pipes or bars as communication channels; (2) research of new methods for assessing material stress behaviors based on the Hopkinson' bar testing using strain sensors; and (3) development of novel approaches to extracting baseline free and baseline dependent defect features using integrated signal processing and machine learning techniques. The projects that will be supported by this equipment will enable understanding of the characteristics of the local civil structures and new design of SHM systems specific to the Eastern Shore's coastal environment. If successful, the acquisition of this equipment will allow the University of Maryland Eastern Shore (UMES) to facilitate a new program to address the significant aging infrastructure problem facing the Eastern Shore area, but more widely the nation. It will enhance the quality of student research and instruction and provide faculty with the necessary tools to pursue aspects of their research which are presently not available to them. Each year, two undergraduate students will be intensely trained to operate this instrument. In addition, laboratory projects utilizing this equipment will be incorporated into several upper level undergraduate courses and senior design capstone projects affecting a minimum of thirty students per year. This instrument will also enhance collaboration with Salisbury University and the Northrop Grumman Technical Service facility, also located on Maryland's Eastern Shore.