Electromechanical transducer for acoustic telemetry system
- Cedar Crest, NM
An improved electromechanical transducer is provided for use in an acoustic telemetry system. The transducer of this invention comprises a stack of ferroelectric ceramic disks interleaved with a plurality of spaced electrodes which are used to electrically pole the ceramic disks. The ceramic stack is housed in a metal tubular drill collar segment. The electrodes are preferably alternatively connected to ground potential and driving potential. This alternating connection of electrodes to ground and driving potential subjects each disk to an equal electric field; and the direction of the field alternates to match the alternating direction of polarization of the ceramic disks. Preferably, a thin metal foil is sandwiched between electrodes to facilitate the electrical connection. Alternatively, a thicker metal spacer plate is selectively used in place of the metal foil in order to promote thermal cooling of the ceramic stack.
- Research Organization:
- AT&T
- DOE Contract Number:
- AC04-76DP00789
- Assignee:
- Teleco Oilfield Services Inc. (Meriden, CT)
- Patent Number(s):
- US 5222049
- OSTI ID:
- 868823
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
transducer
acoustic
telemetry
improved
provided
comprises
stack
ferroelectric
ceramic
disks
interleaved
plurality
spaced
electrodes
electrically
pole
housed
metal
tubular
drill
collar
segment
preferably
alternatively
connected
ground
potential
driving
alternating
connection
subjects
disk
equal
electric
field
direction
alternates
match
polarization
foil
sandwiched
facilitate
electrical
thicker
spacer
plate
selectively
promote
thermal
cooling
spaced electrodes
ground potential
electric field
metal foil
electrical connection
acoustic telemetry
electromechanical transducer
mechanical transducer
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