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Piezoelectric ceramic fibers having metallic cores

A metal core and piezoelectric material technology, applied in the direction of piezoelectric/electrostrictive/magnetostrictive devices, circuits, piezoelectric effect/electrostrictive or magnetostrictive motors, etc., can solve the problem that piezoelectric materials are not sufficient Applicable, aluminum-based materials are not preferred, etc., to achieve the effect of effective design versatility

Active Publication Date: 2005-12-14
MICHELIN & CO (CIE GEN DES ESTAB MICHELIN)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Additionally, certain types of piezoelectric materials may not be adequately suited for a given application or in a given environment
For example, although lead zirconate titanate (PZT) materials are often characterized by desirable operating characteristics, aluminum-based materials may not be preferred for certain applications

Method used

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  • Piezoelectric ceramic fibers having metallic cores
  • Piezoelectric ceramic fibers having metallic cores
  • Piezoelectric ceramic fibers having metallic cores

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Embodiment Construction

[0029] As stated in the Summary of the Invention, the present invention relates in particular to improved piezoelectric materials for use in tire and wheel assembly applications, and more particularly for use in sensors or actuators or in tire electronics Device components with improved piezoelectric materials in power generation modules. Improved piezoelectric materials include piezoceramic fibers, such as barium titanate, formed together with a metal core, aspects of which are depicted in FIGS. 1 , 2 , 4 and 5 . exist Figure 3A with 3B Such piezoelectric structures integrated with tire components are described in . When the piezoelectric module of the present invention is used in power generation applications, the module can be used in power generation systems such as Image 6 shown.

[0030] Selected combinations of the above-described aspects of the disclosed technology correspond to a number of different embodiments of the invention. It should be noted that each emb...

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Abstract

An enhanced piezoelectric wire structure includes an elongated portion of piezoelectric material, a metallic core, and an outer conductive sheath. The metallic core is substantially surrounded by the elongated portion of piezoelectric material and configured to function as a first electrode for the piezoelectric structure. The conductive outer sheath preferably covers selected areas of the elongated portion of piezoelectric material and functions as a second electrode for the structure. The piezoelectric material may correspond to barium titanate ceramic fibers, such that a lead-free structure is effected, however other piezoelectric materials may also be utilized. The disclosed structure can be poled with a reduced poling voltage and lower temperature level, and also requires a reduced voltage potential level required for mechanical actuation.

Description

technical field [0001] The present invention generally relates to improved piezoelectric materials for use in tire and wheel assembly applications, particularly in sensors or actuators or in power generating modules for tire electronics assemblies or other vibration systems. Background technique [0002] The combination of pneumatic tire construction and electronics yields many practical advantages. Tire electronics may include sensors and other components for obtaining information about various physical parameters of the tire, such as temperature, pressure, number of tire rotations, vehicle speed, and the like. This performance information could become useful in tire monitoring and warning systems, and might even be used with feedback systems to adjust proper tire pressure, and with vehicle performance and control systems. [0003] For commercial vehicle applications, however, another possible capability provided by electronic systems integrated with the tire structure cor...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60C23/04H01L41/087H01L41/113
CPCB60C23/0411H10N30/60H10N30/30H02N2/186
Inventor J·蒂森J·D·阿达姆松
Owner MICHELIN & CO (CIE GEN DES ESTAB MICHELIN)
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