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SAW transducer interface to pressure sensing diaphragm

A piezoelectric substrate, surface area technology, applied in the direction of inflatable body pressure measurement, fluid pressure measurement, fluid pressure measurement through electromagnetic components, etc. Effects of elastic coefficients, hysteresis reduction and nonlinear effects

Inactive Publication Date: 2005-05-25
MICHELIN & CO CIE GEN DES ESTAB MICHELIN +1
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  • Abstract
  • Description
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AI Technical Summary

Problems solved by technology

Additional uncertainty is introduced when aligning these parts of a SAW device due to the potential unpredictability of housing device performance during assembly and welding

Method used

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  • SAW transducer interface to pressure sensing diaphragm
  • SAW transducer interface to pressure sensing diaphragm
  • SAW transducer interface to pressure sensing diaphragm

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Embodiment Construction

[0022] As stated in the technical field section, the present invention relates specifically to surface acoustic wave (SAW) devices for sensing physical parameters such as pressure and / or temperature related to the environment surrounding a tire or wheel. In particular, an improved interface is provided between individual pressure sensing diaphragms and the internal sensor components of these SAW devices.

[0023] Figures 1 and 2 provide a prior art SAW device including general housing components and specific exemplary interfaces between the pressure sensing diaphragm and the internal sensor assembly of such a SAW device. image 3 and 4 An exemplary SAW device according to the present invention is shown with improved housing components and an interface between the pressure sensing assembly of such a SAW device. image 3 and 4 Exemplary SAW devices can be incorporated in tire or wheel devices to measure different physical parameters associated with the environment, exemplary asp...

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Abstract

A sensor arrangement for monitoring a physical parameter in a given environment, such as a tire or wheel arrangement, comprising an improved interface between sensor components. The sensor device includes a piezoelectric substrate on which a resonator element, such as a surface acoustic wave (SAW) resonator, is disposed. The resonators are configured to produce an electrical output within a predetermined range of resonator frequencies that can be monitored to determine information such as pressure and temperature to which the devices are exposed. Protrusions are formed on the surface of the piezoelectric substrate which selectively contact recessed surface areas within the flexible cover housing member. The cover housing component and rigid base assembly combine to form a closed enclosure for the sensor device. An antenna may be incorporated into the sensor device to facilitate receiving and / or transmitting communication signals.

Description

technical field [0001] The present invention generally relates to surface acoustic wave (SAW) devices for sensing physical parameters such as pressure and / or temperature related to the environment surrounding a tire or wheel. In particular, an improved interface between individual pressure sensing diaphragms and the internal sensor assembly of such a SAW device is provided. Background technique [0002] The combination of electronics and pneumatic tires yields many practical advantages. The tire electronics includes sensors and other components for obtaining information on different physical parameters of the tire, such as temperature, pressure, number of tire revolutions, vehicle speed, and so on. Information of these properties is useful in tire monitoring and warning systems, and could potentially even be employed by feedback systems to adjust appropriate tire pressure levels. [0003] One particular type of condition-responsive device that has been used to determine di...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60C23/04B60C23/20G01L9/00G01L17/00
CPCB60C23/0408G01L9/0025
Inventor J·C·辛尼特
Owner MICHELIN & CO CIE GEN DES ESTAB MICHELIN
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