F - Mech Eng,Light,Heat,Weapons – 17 – D
Patent
F - Mech Eng,Light,Heat,Weapons
17
D
F17D 5/06 (2006.01) G01M 3/24 (2006.01)
Patent
CA 2159362
Device and method for locating leaks in pipelines, overhearing even weak sounds, from leaking fluid especially in pipelines made of material with limited sound conductivity such as plastic. The device includes a first thin diaphragm (1) with one side (3) in contact with the fluid, whereby vibrations are transferred from the fluid to a second diaphragm (5) joined to the opposite side of the first diaphragm (1). The second diaphragm (5) is made of a preferably sound-sensitive piezo-electrical plastic-foil, the diaphragms being able to co-vibrate with frequencies from one to a few thousand Hertz. The first diaphragm (1) protects against the inner pressure in the liquid lint and moderates any sympathetic vibration. The low-frequency A.C. that is generated by the vibration in the second diaphragm (5) is amplified and transposed to a range of frequencies that is audible for the human ear.
Bcf Llp
Ingenjorsfirma Ultrac Ab
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