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1. 发明授权

US06664716B2 Piezoelectric transducer 有权
公开(公告)号：US06664716B2
公开(公告)日：2003-12-16
申请号：US09876650
申请日：2001-06-07
申请人： Daniel Cuhat , Patricia Davies
发明人： Daniel Cuhat , Patricia Davies
IPC分类号： H01L4104
CPC分类号： H01L41/1132 , H01L41/047
摘要： Various piezoelectric transducers are provided. In one form, a polymer film or thin ceramic piezoelectric transducer is formed of various piezoelectric (active) and dielectric (inactive) layers in which the piezoelectric effect may be attenuated locally at any given point on the surface of the transducer, by use of printed circuit patterns, preferably made by photolithography. This provides a practical realization of a distributed piezoelectric transducer with a bi-dimensional polarization profile that varies smoothly over the surface of the piezoelectric structure. Flexibility of the fabrication procedure provides a way to optimize the design of a distributed piezoelectric transducer for applications such as active vibration control. In another form, a segmented piezoelectric transducer includes a set of active elements such as piezofilms, electronics and flexible printed circuits and connected with external electronic circuitry. The segmented piezoelectric transducer uses a modulation scheme to combine the individual sensor outputs. Modal coordinates may be extracted from a test structure on which the segmented piezoelectric transducer is attached. As well, it is possible to use a distributed piezoelectric transducer to actuate a structure by using a time-varying polarization profile.

2. 发明授权

US06700314B2 Piezoelectric transducer 有权
标题翻译：压电式换能器
公开(公告)号：US06700314B2
公开(公告)日：2004-03-02
申请号：US10402465
申请日：2003-03-28
申请人： Daniel Cuhat , Patricia Davies
发明人： Daniel Cuhat , Patricia Davies
IPC分类号： H01L4100
CPC分类号： H01L41/1132 , H01L41/047 , H01L41/0475
摘要： Various piezoelectric transducers are provided. In one form, a polymer film or thin ceramic piezoelectric transducer is formed of various piezoelectric (active) and dielectric (inactive) layers in which the piezoelectric effect may be attenuated locally at any given point on the surface of the transducer, by use of printed circuit patterns, preferably made by photolithography. This provides a practical realization of a distributed piezoelectric transducer with a bi-dimensional polarization profile that varies smoothly over the surface of the piezoelectric structure. Flexibility of the fabrication procedure provides a way to optimize the design of a distributed piezoelectric transducer for applications such as active vibration control. In another form, a segmented piezoelectric transducer includes a set of active elements such as piezofilms, electronics and flexible printed circuits and connected with external electronic circuitry. The segmented piezoelectric transducer uses a modulation scheme to combine the individual sensor outputs. Modal coordinates may be extracted from a test structure on which the segmented piezoelectric transducer is attached. As well, it is possible to use a distributed piezoelectric transducer to actuate a structure by using a time-varying polarization profile.
摘要翻译：提供各种压电换能器。在一种形式中，聚合物膜或薄陶瓷压电换能器由各种压电（有源）和电介质（非活性）层形成，其中压电效应可以在换能器表面上的任何给定点局部衰减，通过使用印刷电路图案，优选通过光刻制成。这提供了具有在压电结构的表面上平滑变化的二维偏振轮廓的分布式压电换能器的实际实现。制造程序的灵活性提供了一种优化分布式压电换能器的设计的方法，用于诸如主动振动控制的应用。在另一种形式中，分段压电换能器包括一组有源元件，例如压电薄膜，电子元件和柔性印刷电路，并与外部电子电路连接。分段压电传感器使用调制方案来组合各个传感器输出。可以从连接有分段压电换能器的测试结构中提取模态坐标。同样，可以使用分布式压电换能器通过使用时变偏振轮廓来致动结构。

3. 发明授权

US5474352A Protective capsule 失效
标题翻译：保护胶囊
公开(公告)号：US5474352A
公开(公告)日：1995-12-12
申请号：US282282
申请日：1994-07-29
申请人： Patricia Davies
发明人： Patricia Davies
IPC分类号： B60R21/12 , B62D33/06 , F41H7/04 , B60R27/00
CPC分类号： F41H7/044 , B60R21/12
摘要： A protective capsule for a vehicle consists of a shell made from prefabricated protective components which are assembled as an integral assembly inside a cab of the vehicle. The capsule has protective doors which are linked to side doors of the cab so that the linked doors are movable in unison. The components are adjustable relatively to one another and relatively to the floor of the cab to ensure a good fit inside the cab.
摘要翻译：用于车辆的保护胶囊由由预制保护部件制成的壳体组成，其组装成车辆驾驶室内的整体组件。胶囊具有与驾驶室的侧门连接的保护门，使得连接的门可以一致地移动。这些部件可相对于彼此相对地调节并且相对于驾驶室的地板是可调节的，以确保驾驶室内的良好的配合。

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