Sonar arrangements
US4525816A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Sep 23, 1982 |
| Grant date | Jun 25, 1985 |
| Priority date | — |
| Expiry date | Sep 23, 2002 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S367/905
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
A sonar beam steering arrangement in which a circular array of electroacoustic transducers are sampled in sequence, the samples being digitized and stored serially in a shift register. The register is several cycles long so that samples from all of the `illuminated` transducers can be stored simultaneously. The various stages have resistance tappings of different values such that a linear broadside array is simulated for a particular transducer at a particular stage in the shift register cycle. As the samples progress through the register each transducer in turn acquires this simulated broadside array and thus provides a narrow beam 360.degree. scan. Interpolation between adjacent transducer `dead-ahead` direction is obtained by (e.g.) triplicating the shift register and adjusting the weightings slightly from each register to the next.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.