Pressure wave sensor using levitated mass

a technology of pressure wave sensor and levitation mass, which is applied in the direction of acceleration measurement using interia force, specific gravity measurement, instruments, etc., can solve the problems of complex resonance phenomena, non-linear response non-linearity, physical and electrical characteristics of the sensor material,

Inactive Publication Date: 2004-12-09
IBM CORP
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Problems solved by technology

The characteristics of the mechanical suspension method (e.g. film over a round opening, film over an oval opening, etc.), the physical characteristics of the suspension material itself (e.g. thickness and elasticity of the film) determine, and the physical and electrical characteristics of the sensor material during flexing or bending give rise to response non-linearities, complex resonance phenomena, and loss of efficiency in wave-to-signal con

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  • Pressure wave sensor using levitated mass
  • Pressure wave sensor using levitated mass
  • Pressure wave sensor using levitated mass

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Embodiment Construction

[0030] A microphone is a form of a pressure wave sensor which is designed to detect acoustic waves in the human audible range, and to generate an electrical signal representative of those waves. In a broader sense, pressure wave sensors respond to a variety of physical phenomena, including acoustic waves in air, but also waves in fluids and solids, such as hydrophones, ultrasound transducers, etc.

[0031] For the purposes of this disclosure, we will refer to microphones as a specific embodiment option of the present invention, which may be readily realized in alternate forms for other types of pressure waves. Therefore, our presentation of a microphone embodiment is for illustration purposes only, and does not indicate that present invention is limited to such an embodiment and use.

[0032] The present invention utilizes, in part, a configuration disclosed in the related and incorporated patent application. The invention disclosed in the related patent application was a highly sensitive...

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Abstract

A mass is levitated with respect to a base, at least one of which is comprised of a diamagnetic material, with the levitated mass also having a permanent magnetic property. A second permanent magnet is optionally configured such that it attracts the levitation mass away from the base to overcome gravitational force on the mass, thereby suspending the mass over the surface of the base. The mass is contained in a nonmagnetic, non-shielding and optionally optically-transparent housing so as to limit its excursion within a range of levitation positions. A position measurement means such as a laser interferometer, capacitance detector, or pickup coil is configured to measure positional deviations of the mass in response to incident pressure wave, the output of which being an electronic signal representing the pressure wave.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS (CLAIMING BENEFIT UNDER 35 U.S.C. 120)[0001] This patent application is related to docket number AUS920030287US1, patent application Ser. No. ______, filed on ______ (to be amended to include serial number and filing date), by Viktors Berstis.INCORPORATION BY REFERENCE[0002] The related patent application is related to docket number AUS920030287US1, patent application Ser. No. ______, filed on ______ (to be amended to include serial number and filing date), by Viktors Berstis, is hereby incorporated by reference in its entirety, including figures.FEDERALLY SPONSORED RESEARCH AND DEVELOPMENT STATEMENT[0003] This invention was not developed in conjunction with any Federally sponsored contract.MICROFICHE APPENDIX[0004] Not applicable.[0005] 1. Field of the Invention[0006] This invention relates to methods and devices for converting audio waves into electronic signals such as microphones, hydrophones, and sonic transducers.[0007] 2. Background of ...

Claims

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Application Information

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IPC IPC(8): G01V7/02
CPCG01V7/02
Inventor BERSTIS, VIKTORS
Owner IBM CORP
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