Electrical generator or motor structure – Non-dynamoelectric – Piezoelectric elements and devices
Patent
1989-09-13
1992-01-14
Budd, Mark O.
Electrical generator or motor structure
Non-dynamoelectric
Piezoelectric elements and devices
310328, 310369, 310337, 73632, 73151, 367 75, 367912, H01L 4108
Patent
active
050813919
ABSTRACT:
A transducer is constructed of a cylindrical shell and at least one pair of piezoelectric sections. Each member of the pair of piezoelectric sections is rigidly bonded to the wall of the cylinder, in a position diametrically opposed from the other member of the pair. Operation as an acoustic source transducer is accomplished by electrically energizing each piezoelectric section in such a manner as to cause the piezelectric sections to elongate and contract, respectively out of phase with one another, along the cylinder length. This causes flexural bending of the cylinder, with the bending being asymmetrical with respect to the cylinder axis. When one pair of piezoelectric sections is used in this manner, the transducer approximates an acoustic dipole radiator, and if more than one pair is used, the transducer can be used to approximate higher order polarized acoustic radiators. Various embodiments of the invention are particularly useful as either an acoustical source or detector in liquid-filled boreholes for geophysical application.
REFERENCES:
patent: 3136381 (1964-06-01), Anderson
patent: 4446544 (1984-05-01), Connolly, Jr.
patent: 4525645 (1985-06-01), Shirley
patent: 4672592 (1987-06-01), Skinner
patent: 4706229 (1987-11-01), Congdon
patent: 4754441 (1988-06-01), Butler
patent: 4785177 (1988-11-01), Besocke
patent: 4868446 (1989-09-01), Kumada
patent: 4878207 (1989-10-01), Jandera
patent: 4949316 (1990-08-01), Katahara
patent: 4958100 (1990-09-01), Crawley et al.
Budd Mark O.
Southwest Research Institute
LandOfFree
Piezoelectric cylindrical transducer for producing or detecting does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Piezoelectric cylindrical transducer for producing or detecting , we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Piezoelectric cylindrical transducer for producing or detecting will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-543592