NAFC Acoustic Emission Sensors for Real-time Monitoring of Structures

用于结构实时监测的 NAFC 声发射传感器

• 批准号: 0826418
• 负责人: Yong Shi
• 金额: $ 23.09万
• 依托单位: Stevens Institute of Technology
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2008
• 资助国家: 美国
• 起止时间: 2008-09-01 至 2011-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0826418&HistoricalAwards=false
• 关键词: NAFC; Acoustic; Emission; Sensors; Real

The objective of the proposed research is to apply innovative nanotechnologies for creating acoustic emission (AE) sensors for real-time monitoring of structures. The proposed AE sensors are composed of Nanoscale Active Fiber Composites (NAFCs) and the project involves the design, manufacturing and characterization of the sensors consisting of piezoelectric Lead Zirconate Titanate (PZT) nanofibers. This work will result in advanced acoustic emission sensors with high sensitivity, excellent conformability and suitability for being imbedded into or attached on the surface of structures. These sensors are very cost effective to produce and self-powered and can thus be conveniently applied for real-time monitoring of civil engineering structures such as bridges, dams, towers, roads, etc. Networks of NAFC sensors could be used to detect defects such as cracks in structural elements as well as delamination and debonding in various composite and sandwich components. In addition, this project also aims to develop and deploy nanotechnology-related educational materials and contribute to motivating k-12 students and students from underrepresented groups to pursue STEM careers. Through this project, the students will have the opportunity to participate in a stimulating multi-disciplinary environment in an exciting research field, more students will benefit from cybertechnology-enabled education modules documented during the process

拟议研究的目标是应用创新的纳米技术来创建声发射(AE)传感器，用于实时监测结构。提出的声发射传感器由纳米级活性纤维复合材料(NAFC)组成，该项目涉及由压电钛酸铅(PZT)纳米纤维组成的传感器的设计、制造和表征。这项工作将导致先进的声发射传感器具有高灵敏度，良好的符合性和适合于嵌入或附着在结构的表面。这些传感器的制造成本非常低，而且是自供电的，因此可以方便地应用于对桥梁、大坝、塔楼、道路等土木工程结构的实时监测。NAFC传感器网络可以用于检测结构构件的裂缝以及各种复合材料和夹层构件的分层和剥离等缺陷。此外，该项目还旨在开发和部署与纳米技术有关的教育材料，并促进激励K-12学生和来自代表性不足群体的学生从事STEM职业。通过这个项目，学生将有机会参与一个激动人心的多学科环境，在一个令人兴奋的研究领域，更多的学生将受益于在此过程中记录的基于网络技术的教育模块