Periodic Cellular Piezoelectric Sensors and Actuators for Frequency Based Wave Steering

用于基于频率的波导的周期性蜂窝压电传感器和执行器

• 批准号: 0800263
• 负责人: Massimo Ruzzene
• 金额: $ 24.87万
• 依托单位: Georgia Tech Research Corporation
• 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 2012-04-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0800263&HistoricalAwards=false
• 关键词: Periodic; Cellular; Piezoelectric; Sensors; Actuators

The objective of the proposed research is the investigation, development, optimization, manufacturing and testing of a completely novel class of actuators and sensors for structural health monitoring (SHM). Periodic cellular configurations are proposed as effective means to provide actuators and sensors with strong, frequency dependent directional characteristics, which allow beam steering to occur through a simple sweep of the excitation frequency. Beam steering is achieved by exploiting interference phenomena generated by the periodicity of the array and the simultaneous actuation of its components. Such interference phenomena produce waves with frequency dependent directional characteristics which allow scanning of an area or volume, as well as focusing of the acoustic energy through a simple frequency sweep. This concept introduces a paradigm shift in the design of actuators and sensors for ultrasonic and guided wave inspection. Major reduction in hardware complexity will allow small and micro packaging of sensors/actuators, whose application can be extended well beyond the filed of SHM.

提出的研究目标是调查、开发、优化、制造和测试一种全新的结构健康监测（SHM）致动器和传感器。周期性单元结构被认为是一种有效的手段，可以为致动器和传感器提供强大的、频率相关的方向特性，通过对激励频率的简单扫描就可以实现波束转向。通过利用阵列的周期性和其组件的同步驱动所产生的干扰现象来实现波束转向。这种干扰现象产生的波具有频率依赖的方向特性，允许扫描一个区域或体积，以及通过简单的频率扫描聚焦声波能量。这一概念引入了超声和导波检测致动器和传感器设计的范式转变。硬件复杂性的大幅降低将允许传感器/执行器的小型和微型封装，其应用可以扩展到远远超出SHM领域。