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1. 发明申请

US20110138918A1 Method of Assessing Bolted Joint Integrity 有权
标题翻译：螺栓连接完整性评估方法
公开(公告)号：US20110138918A1
公开(公告)日：2011-06-16
申请号：US12968144
申请日：2010-12-14
申请人： Andrei N. Zagrai , Derek Doyle
发明人： Andrei N. Zagrai , Derek Doyle
IPC分类号： G01N29/04
CPC分类号： G01N29/4427 , G01N29/2437 , G01N29/34 , G01N2291/02827 , G01N2291/0421 , G01N2291/2691
摘要： A method of assessing bolted joint integrity. A guided wave is sent through a structure containing at least one bolted joint. The guided wave that is subsequently propagated through the structure and interacted with the bolted joint is measured to obtain a measured result. At least one parameter of the guided wave after its travel through the structure, and after having been affected by a nonlinear acoustic behavior of the bolted joint, is analyzed. Either at least one guided wave parameter is compared to a wave propagation pattern of the bolted joint at a correct torque level, or variation of at least one guided wave parameter is compared, to determine changes in wave propagation time and/or wave propagation shape. An incorrect torque level of the bolted joint is inferred from any changes that are determined.
摘要翻译：评估螺栓连接完整性的方法。导波通过包含至少一个螺栓连接的结构发送。测量随后通过结构传播并与螺栓连接相互作用的导波，以获得测量结果。分析了导波在行进通过结构之后以及受到螺栓接头的非线性声学行为影响后的至少一个参数。将至少一个导波参数与螺栓接头的波传播模式在正确的扭矩水平进行比较，或者比较至少一个导波参数的变化，以确定波传播时间和/或波传播形状的变化。根据确定的任何变化推断出螺栓接头的扭矩水平不正确。

2. 发明授权

US06996480B2 Structural health monitoring system utilizing guided lamb waves embedded ultrasonic structural radar 有权
标题翻译：结构健康监测系统利用引导羊羔波嵌入式超声波结构雷达
公开(公告)号：US06996480B2
公开(公告)日：2006-02-07
申请号：US10462583
申请日：2003-06-16
申请人： Victor Giurgiutiu , Jingjing Bao , Andrei N. Zagrai
发明人： Victor Giurgiutiu , Jingjing Bao , Andrei N. Zagrai
IPC分类号： G01B5/28
CPC分类号： G01M5/0066 , G01M5/0033 , G01N29/041 , G01N29/069 , G01N29/2475 , G01N29/262 , G01N2291/0231 , G01N2291/0237 , G01N2291/0258 , G01N2291/0289 , G01N2291/0425 , G01N2291/0427 , G01N2291/044 , G01N2291/106 , G01N2291/2694
摘要： A method and device for performing ultrasonic damage detection in a thin-wall structure using an array of embedded Piezoelectric Wafer Active Sensors (PWAS) for the transmission and reception of guided waves and a signal processing methodology based on the beamforming process. The beamforming signal processing has been adapted to the specifics of guided elastic waves traveling in thin-wall structures.
摘要翻译：一种用于使用嵌入式压电晶片有源传感器（PWAS）阵列在薄壁结构中执行超导损伤检测的方法和装置，用于传导和接收导波，以及基于波束形成过程的信号处理方法。波束形成信号处理已经适应于在薄壁结构中传播的引导弹性波的细节。

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