Acoustic sensor with piezo-arrangement film

Details Acoustic sensor with piezo-arrangement film Acoustic sensor with piezo-arrangement film

2011-06-21

2011-06-21

Dougherty, Thomas M (Department: 2837)

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

C310S324000, C333S208000, C333S08100R, C073S591000, C073S645000

Reexamination Certificate

active

07965018

ABSTRACT:
Provided is an acoustic sensor for measuring a sound wave propagating through a gas such as air or a fluid such as water and an elastic wave propagating through a solid medium, and more particularly, an acoustic sensor with a piezo-arrangement film capable of detecting frequencies in a broad band or amplifying a signal at a specific frequency by comparting a waveguide into an upper waveguide and a lower waveguide by means of a compartment diaphragm and arranging piezoelectric sensors on the compartment diaphragm in several forms. The acoustic sensor can be utilized as a resonant acoustic sensor in which the piezoelectric sensors are arranged on the compartment diaphragm in the same form so that a signal at a specific frequency overlaps for high sensibility or a broadband acoustic sensor in which the piezoelectric sensors are arranged in a different form to detect frequencies in a broad band. The sensor for measuring an acoustic wave includes a waveguide including a vibrating membrane for receiving the acoustic wave, an emitting membrane for emitting the acoustic wave, and a propagation medium filled therein for propagating the acoustic wave received by the vibrating membrane; a compartment diaphragm for computing the waveguide into an upper waveguide and a lower waveguide; an omni-directional endpoint processing unit formed at an end of the waveguide for absorbing the acoustic wave received by the vibrating membrane; and a plurality of piezoelectric sensors formed on the compartment diaphragm for detecting the acoustic wave.

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International Search Report and Written Opinion for PCT/KR 2007/003639 dated Oct. 26, 2007.

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