Passive and Active Thin Film Strain Sensors for Earthquake Damage Assessment

用于地震损坏评估的无源和有源薄膜应变传感器

• 批准号: 9627265
• 负责人: William Euler
• 金额: $ 23.87万
• 依托单位: University of Rhode Island
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1997
• 资助国家: 美国
• 起止时间: 1997-01-01 至 2000-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9627265&HistoricalAwards=false
• 关键词: Passive; Active; Thin; Film; Strain

967265 Euler This research project is concerned with the development of new thin film strain gages. Three approaches will be used. The first employs wide band gap semiconductors as the active sensing element in a strain gage where both resistivity and absorption spectroscopy can be used to monitor the strain. These materials are attractive because they have good reproductivity, long term environmental and sensor stability, and large gage factors. The second approach will use polymers as the sensing element. The optical response of these materials is also sensitive to strain with the potential to lead to inexpensive, commodity level active strain elements. Finally, new polymers will be developed that store the integrated strain over time and can be used to measure accumulated damage to the substrate. The development of this aspect of the research relies on the ability to monitor the strain response conveniently such as during earthquake, wind, or vehicle induced structural vibrations using the optical methodology developed in the initial stages of the project. A successful outcome to the research will lead to cheaper strain gages that, because of the thin film nature, can be applied to buildings and infrastructure materials to monitor the strain and to assess the damage during a catastrophic event such as an earthquake. ***

967265 Euler 该研究项目涉及新型薄膜应变计的开发。 将使用三种方法。 第一种采用宽带隙半导体作为应变计中的有源传感元件，其中电阻率和吸收光谱均可用于监测应变。 这些材料之所以有吸引力，是因为它们具有良好的再现性、长期的环境和传感器稳定性以及大的应变系数。 第二种方法将使用聚合物作为传感元件。 这些材料的光学响应对应变也很敏感，有可能产生廉价的商品级有源应变元件。 最后，将开发出新的聚合物，可以随着时间的推移存储积分应变，并可用于测量基材的累积损伤。 这方面研究的发展依赖于使用项目初始阶段开发的光学方法方便地监测应变响应的能力，例如在地震、风或车辆引起的结构振动期间。 这项研究的成功结果将带来更便宜的应变计，由于薄膜的性质，这些应变计可以应用于建筑物和基础设施材料，以监测应变并评估地震等灾难性事件期间的损坏。 ***