SBIR PHASE II: High Perfromance Nondestructive Evaluation System Using Giant Magnetoresistance Sensors

SBIR PHASE II：使用巨磁阻传感器的高性能无损评估系统

• 批准号: 9704080
• 负责人: Eric Boltz
• 金额: $ 30万
• 依托单位: TPL, Inc.
• 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: 1997-08-15 至 1999-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9704080&HistoricalAwards=false
• 关键词: SBIR; PHASE; II; Perfromance; Nondestructive

This Small Business Innovation Research Phase II project will conduct the research necessary to design and develop a fully functional non-destructive evaluation (NDE) system based on sensors made with giant magnetoresistance (GMR) materials. Phase I research demonstrated that an NDE system based on such sensors has vastly superior performance to current NDE techniques. Using a simple, low cost sensor and electronics system, and a proprietary analytical technique, it was possible to detect creacks with widths in the 20 microns to 100 microns range in both aluminum and steel sheets, with signal-to-noise (S/N) ratios exceeding 100. Of even greater importance, tests with an aircraft section showed it was possible to detect cracks beneath overlying sheets of metal, and under rivet heads at high S/N levels. These results indicate the new technology will represent a major advance in NDE capability, with considerable implications for safety, efficiency and cost savings. As both the age and complexity of the nation's transportation and civil structures increase, the importance of improved NDE technology is amplified. Due to the lack of appropriate technology, many existing in-service inspection (ISI) programs are conducted using visual inspection only. This high-sensitivity, deeply penetrating electromagnetic sensor would provide rapid, cost-effective inspection for embedded defects in electrically conductive structures including commercial and military aircraft, pressure vessels and pipelines.

这个小型企业创新研究第二阶段项目将进行必要的研究，以设计和开发基于巨磁电阻(GMR)材料制成的传感器的全功能无损评估(NDE)系统。第一阶段的研究表明，基于这种传感器的无损检测系统的性能远远优于目前的无损检测技术。使用简单、低成本的传感器和电子系统，以及专有的分析技术，可以检测到铝和钢板中宽度在20微米到100微米范围内的裂纹，信噪比(S/N)超过100。更重要的是，飞机部分的测试表明，它可以探测到覆盖在金属板下的裂缝，以及S/N高水平的铆钉头下的裂缝。这些结果表明，这项新技术将是无损检测能力的重大进步，对安全、效率和成本节约具有相当大的影响。随着国家交通和民用结构的年龄和复杂性的增加，改进的无损检测技术的重要性被放大。由于缺乏适当的技术，许多现有的在役检查(ISI)计划仅使用目视检查进行。这种高灵敏度、深度穿透的电磁传感器将为商用和军用飞机、压力容器和管道等导电结构中的嵌入缺陷提供快速、经济高效的检测。