Communications – electrical: acoustic wave systems and devices – Signal transducers – Underwater type
Patent
1991-08-14
1992-11-24
Lobo, Ian J.
Communications, electrical: acoustic wave systems and devices
Signal transducers
Underwater type
310328, 367 82, H04R 1700, H01L 4104
Patent
active
051669080
ABSTRACT:
A transducer and method for imparting vibrational signals to a structure are disclosed. The transducer according to one embodiment includes a set of piezoelectric disks placed within a deformable housing that has longitudinal slits with rounded terminations. Electrodes are placed adjacent to the piezoelectric disks in such a manner that an electrical signal causes the piezoelectric disks to expand and contract along the longitudinal axis of the transducer. The longitudinal slits in the housing allow its expansion in a direction substantially parallel to its longitudinal axis, while the rounded terminations reduce the tendency of the housing to crack as a result of use, enabling high frequency operation over extended periods of time. The housing is mounted within the hollow interior of a structure, such as to a well pipe string, in such a manner that the deformation of the housing as a result of the force applied by the piezoelectric elements transmit data along the structure by way of axial compressional vibrations.
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Atlantic Richfield Company
Lobo Ian J.
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