Leakage-sound detecting apparatus

Details Leakage-sound detecting apparatus Leakage-sound detecting apparatus

1995-09-06

1997-02-11

Brock, Michael

Measuring and testing

With fluid pressure

Leakage

73592, 73644, G01M 324, H04R 1700

Patent

active

056023278

ABSTRACT:
A leakage-sound detecting apparatus is provided for efficiently detecting water leakage in a plastic pipe by increasing sensitivity to a low frequency sound component and efficiently reducing stray noise, as well as protecting a piezoelectric element. To this end a detection portion and a pedestal portion are connected through a mechanical resonant member formed of a soft material. A low frequency sound component is amplified by the resonant member, and high frequency components are substantially attenuated. In an alternative arrangement a detection portion and a mechanical resonant member mounted on a pedestal portion are connected through a buffer portion having a buffer member arranged therein. When a shock is applied to the bottom of the pedestal portion, due to the apparatus being dropped for example, the buffer member is compressed, and no overload is applied to a piezoelectric element.

REFERENCES:
patent: 3387604 (1968-06-01), Erikson
patent: 3663842 (1972-05-01), Miller
patent: 4205686 (1980-06-01), Harris et al.

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