EAGER: Multi-source Power Scavenging Schemes

EAGER：多源电力回收方案

• 批准号: 0938870
• 负责人: Ephrahim Garcia
• 金额: $ 10万
• 依托单位: Cornell University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2009
• 资助国家: 美国
• 起止时间: 2009-06-15 至 2011-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0938870&HistoricalAwards=false
• 关键词: EAGER; Multi; source; Power; Scavenging

The creation of self-powered, health monitoring systems is possible only through the harvesting of energy from the environment. Energy in the environment can be converted to stored electrical energy by a variety of means, such as solar energy collection and mechanical power harvesting. Solar power is the most established technique, and can generate low voltage, moderate current at 10 mW/cm2. The drawbacks of solar for this application are its dependence on direct sunlight. The PI proposes to utilize vibrations from machines and wind induced structural oscillations to generate mechanical power that can be tapped as an electrical power source. Piezoelectric materials are compact, energy dense actuators and have unique properties for energy harvesting. They are capable of generating high voltages for modest levels of strain. Researchers have shown that nonlinear switching can enhance the performance of piezoelectric power harvesting, and it suggests that power electronics need to be considered when designing such systems. This approach can increase the theoretical power harvested from a piezoelectric by 400%. Additionally, circuits that can switch using self-generated power and sensing, in synchronization with the strain of piezoelectric devices will be also investigated.This is an EAGER project with a GOALI component.

只有通过从环境中获取能量，才能创建自供电的健康监测系统。环境中的能量可以通过多种方式转化为储存的电能，例如太阳能收集和机械能收集。太阳能是最成熟的技术，可以产生低电压、10 mW/cm2 的中等电流。太阳能对于这种应用的缺点是它依赖于直射阳光。 PI 建议利用机器振动和风引起的结构振动来产生机械能，并可将其用作电源。压电材料是紧凑、能量密集的执行器，具有独特的能量收集特性。它们能够在适度的应变水平下产生高电压。研究人员已经证明，非线性开关可以增强压电能量收集的性能，这表明在设计此类系统时需要考虑电力电子学。这种方法可以将从压电体收集的理论功率增加 400%。此外，还将研究能够使用自生电源和传感进行开关、与压电器件的应变同步的电路。这是一个带有 GOALI 组件的 EAGER 项目。