Power transmission apparatus for enclosed fluid systems

Details Power transmission apparatus for enclosed fluid systems Power transmission apparatus for enclosed fluid systems

1983-04-18

1987-05-26

Tarcza, Thomas H.

Communications, electrical: acoustic wave systems and devices

Wellbore telemetering

Through well fluids

340857, G01J 140

Patent

active

046690689

ABSTRACT:
In a fluid filled tube, a technique for absorbing or generating converted energy from a traveling sonic wave.
The disclosed embodiment employs an acoustic energy converter mechanism and sonic wave channels which are both placed in the walls of the tube. The acoustic energy converter mechanism has faces which are exposed to the sonic wave channels rather than the annulus of the tube. The sonic wave channels allow the mechanical acoustic energy converter mechanism to be reduced in length, yet still expose the faces of the acoustic energy converter mechanism to sonic waves which are 180 degrees out of phase. The acoustic energy mechanism of this invention preferrably uses springs which substitute for the fluid medium of the quarterwave transformer cavity. These springs are designed to simulate a fluid having a sonic impedance and propagation velocity which will make the acoustic energy converter mechanism more compact. Still another version of the invention uses a piezoelectric bender mechanism instead of the inner oscillating body, associated resonating spring, quarterwave cavities, and electromagnetic generating coil arrangement.

REFERENCES:
patent: 1675318 (1928-07-01), Abrahams
patent: 4215426 (1980-07-01), Klatt

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