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1. 发明申请

US20160296975A1 ULTRASONIC TRANSDUCER WITH BACKING HAVING SPATIALLY SEGMENTED SURFACE 审中-公开
标题翻译：超声波传感器具有背景具有空间划分的表面
公开(公告)号：US20160296975A1
公开(公告)日：2016-10-13
申请号：US15038569
申请日：2014-11-21
申请人： SUNNYBROOK HEALTH SCIENCES CENTRE
发明人： Marc LUKACS , Brian COURTNEY , Chelsea MUNDING
IPC分类号： B06B1/06 , A61B8/12 , A61B8/00
CPC分类号： B06B1/0685 , A61B8/12 , A61B8/4483 , B06B1/0622 , G01D5/48 , G01S15/8909 , G10K11/002
摘要： Methods and devices are provided for suppressing reverberations within an ultrasound transducer with a backing whereby the backing may not sufficiently attenuate the acoustic energy by means of acoustic absorption and scattering alone. At least a portion of a surface of the backing is segmented into a plurality of levels defined by surface segments. The levels may be are spatially offset so that acoustic reflections from the segmented surface are spread out in time, thereby decreasing the net amplitude of the internally reflected waves as they interact with the piezoelectric layer. Adjacent (neighbouring) levels may be spatially offset by a longitudinal distance equaling approximately an odd number multiple of a quarter of an operational wavelength of the transducer, so that destructive interference occurs from acoustic waves reflected from adjacent levels. Various example configurations of segmented surfaces are described, and methods for selecting a profile of a segmented surface are provided.
摘要翻译：提供了用于抑制具有背衬的超声换能器内的混响的方法和装置，由此背衬可能不能通过单独的吸声和散射充分衰减声能。背衬的表面的至少一部分被分割成由表面段限定的多个层。电平可以在空间上偏移，使得来自分段表面的声反射在时间上扩展，从而当它们与压电层相互作用时减小内部反射波的净振幅。相邻（相邻）电平可以在空间上偏移等于换能器的工作波长的四分之一的近似奇数倍的纵向距离，从而从相邻电平反射的声波发生相消干涉。描述了分段表面的各种示例配置，并且提供了用于选择分段表面的轮廓的方法。

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