公开(公告)号：US20090195123A1

公开(公告)日：2009-08-06

申请号：US12425548

申请日：2009-04-17

申请人： Koji MURATA ,  Masato KOTANI ,  Takaaki ASADA ,  Takayuki SHIMAMOTO ,  Hiroyuki HIRANO ,  Mio FURUYA

发明人： Koji MURATA ,  Masato KOTANI ,  Takaaki ASADA ,  Takayuki SHIMAMOTO ,  Hiroyuki HIRANO ,  Mio FURUYA

IPC分类号： H01L41/053 ,  G10K9/122

CPC分类号： G10K9/122 ,  G01S7/521 ,  G01S15/931 ,  G10K9/22

摘要： An ultrasonic sensor includes a cylindrical outer case with a bottom and a piezoelectric element fixed to the inner side of the bottom portion of the outer case. A ring-shaped inner case having a central hole extending in the axial direction in the central portion thereof is disposed inside the sidewall portion of the outer case. A flat or substantially flat portion is provided around the central hole of the inner case, and a viscoelastic filler is arranged so as to extend from the central hole to the flat or substantially flat portion of the inner case. A tabular member is disposed on the flat or substantially flat portion so as to face the flat or substantially flat portion with the filler interposed therebetween. When the inner case vibrates, shear deformation occurs in the filler interposed between the flat or substantially flat portion and the tabular member since the tabular member is not substantially deformed, and the vibration is reduced by the viscoelastic damping effect.

摘要翻译： 超声波传感器包括具有底部的圆柱形外壳和固定到外壳的底部的内侧的压电元件。 具有在其中心部分沿轴向延伸的中心孔的环形内壳设置在外壳的侧壁部分的内侧。 在内壳的中心孔周围设置平坦或基本上平坦的部分，并且粘弹性填料被布置成从中心孔延伸到内壳的平坦或基本上平坦的部分。 板状构件设置在平坦或基本上平坦的部分上，以便面对平坦或基本上平坦的部分，填充物插入其间。 当内壳体振动时，由于平板状构件基本上不变形，插入在平坦部分或基本上平坦的部分之间的填料中产生剪切变形，并且通过粘弹性阻尼效应减小了振动。

公开(公告)号：US20080218030A1

公开(公告)日：2008-09-11

申请号：US12103912

申请日：2008-04-16

申请人： Takaaki ASADA ,  Takayuki SHIMAMOTO ,  Koji MURATA ,  Mio FURUYA

发明人： Takaaki ASADA ,  Takayuki SHIMAMOTO ,  Koji MURATA ,  Mio FURUYA

IPC分类号： H01L41/00

CPC分类号： G10K9/122 ,  G01S7/521 ,  G01S15/931 ,  G01S2015/938 ,  G10K9/22

摘要： An ultrasonic transducer includes a cylindrical cap member having a bottom. A piezoelectric element is bonded to the inner side of a bottom portion of the cap member using a conductive adhesive or other suitable adhesive. An inner frame made of a material having an acoustic impedance greater than that of the cap member is fitted into the cap member so as to be in contact with a side portion, including the end portion, of the cap member. Through-holes are provided in the side portion of the inner frame. Lead wires are connected to the piezoelectric element and the inner frame, respectively. A sound absorber and a damper are inserted into the inner frame. The damper is in direct contact with the side portion of the cap member via the through-holes of the inner frame.

摘要翻译： 超声波换能器包括具有底部的圆柱形盖构件。 使用导电粘合剂或其它合适的粘合剂将压电元件结合到盖构件的底部的内侧。 由具有大于盖构件的声阻抗的材料制成的内框架被装配到盖构件中以便与帽构件的包括端部的侧部接触。 在内框架的侧部设有通孔。 引线分别连接到压电元件和内框架。 吸音器和阻尼器插入到内框架中。 阻尼器经由内框架的通孔与盖构件的侧部直接接触。