Magnetostrictive acoustic transducer
US4716556A · kind A · utility
22Cited by
13References
16Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 23, 1981 |
| Grant date | Dec 29, 1987 |
| Priority date | — |
| Expiry date | Jul 23, 2001 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01V1/201
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An acoustic transducer is provided that uses a layer of magnetostrictive ferromagnetic material having high magneto-mechanical coupling. The ferromagnetic material is adhered to a part of the outer surface of a resilient rod, so that an incident acoustic signal causes a change in stress in the magnetic material and, in turn, a change in the material's magnetization. An electrical coil surrounds the magnetic material and converts the changing magnetization into an electrical signal. A plurality of transducers may be assembled into an array and towed behind a ship to detect underwater acoustic signals.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.