公开(公告)号：US20140157898A1

公开(公告)日：2014-06-12

申请号：US13712461

申请日：2012-12-12

Applicant: Georgia Tech Research Corporation

Inventor： Massimo Ruzzene ,  Matteo Senesi ,  Buli Xu

IPC: G01N29/12

CPC classification number: G01N29/12 ,  G01N29/245 ,  G01N29/262 ,  G01N29/42 ,  G01N2291/0258 ,  G01N2291/106

Abstract: Frequency-steerable acoustic transducers (FSATs) that allow directional generation or sensing of waves propagating in two-dimensional domains. Directionality is the result of the spatial filtering effect produced by the characteristic shape of the sensing surface. A wavenumber spiral FSAT (WS-FSAT) maps the direction of wave sensing in the [0°, 180°] range to a specific frequency component in the spectrum of the received signal. The use of a wavenumber spiral FSAT operating in sensing mode can be used for the localization of broadband acoustic events. One configuration includes a broadband source generating guided elastic waves in an isotropic plate. The WS-FSAT records the plate response and defines the source location through a time-frequency analysis of the received signal. The frequency selective response of the WS-FSAT directly maps the dominant component of the received signal to the direction of arrival of the incoming wave, thus greatly facilitating the source localization procedure.

Abstract translation: 频率可控的声学换能器（FSAT），允许定向生成或感测在二维域中传播的波。 方向性是由感测表面的特征形状产生的空间滤波效果的结果。 波数螺旋FSAT（WS-FSAT）将[0°，180°]范围内的波感测方向映射到接收信号频谱中的特定频率分量。 使用在感测模式下操作的波数螺旋FSAT可用于宽带声学事件的定位。 一种配置包括在各向同性板中产生引导弹性波的宽带源。 WS-FSAT通过对接收到的信号的时间 - 频率分析来记录板响应并定义源位置。 WS-FSAT的频率选择响应直接将接收信号的主要分量映射到入波的到达方向，从而极大地促进了源定位过程。

公开(公告)号：US08960005B2

公开(公告)日：2015-02-24

申请号：US13712461

申请日：2012-12-12

Applicant: Georgia Tech Research Corporation

Inventor： Massimo Ruzzene ,  Matteo Senesi ,  Buli Xu

IPC: G01N9/04 ,  G01N29/12 ,  G01N29/24 ,  G01N29/26 ,  G01N29/42

CPC classification number: G01N29/12 ,  G01N29/245 ,  G01N29/262 ,  G01N29/42 ,  G01N2291/0258 ,  G01N2291/106

Abstract: Frequency-steerable acoustic transducers (FSATs) that allow directional generation or sensing of waves propagating in two-dimensional domains. Directionality is the result of the spatial filtering effect produced by the characteristic shape of the sensing surface. A wavenumber spiral FSAT (WS-FSAT) maps the direction of wave sensing in the [0°, 180°] range to a specific frequency component in the spectrum of the received signal. The use of a wavenumber spiral FSAT operating in sensing mode can be used for the localization of broadband acoustic events. One configuration includes a broadband source generating guided elastic waves in an isotropic plate. The WS-FSAT records the plate response and defines the source location through a time-frequency analysis of the received signal. The frequency selective response of the WS-FSAT directly maps the dominant component of the received signal to the direction of arrival of the incoming wave, thus greatly facilitating the source localization procedure.

Abstract translation: 频率可控的声学换能器（FSAT），允许定向生成或感测在二维域中传播的波。 方向性是由感测表面的特征形状产生的空间滤波效应的结果。 波数螺旋FSAT（WS-FSAT）将[0°，180°]范围内的波感测方向映射到接收信号频谱中的特定频率分量。 使用在感测模式下操作的波数螺旋FSAT可用于宽带声学事件的定位。 一种配置包括在各向同性板中产生引导弹性波的宽带源。 WS-FSAT通过对接收到的信号的时间 - 频率分析来记录板响应并定义源位置。 WS-FSAT的频率选择响应直接将接收信号的主要分量映射到入波的到达方向，从而极大地促进了源定位过程。