Refraction delay error correction using agile beamformer
US6443897B1 · kind B1 · utility
4Cited by
4References
31Claims
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Key dates
| Filing date | Dec 28, 2000 |
| Grant date | Sep 3, 2002 |
| Priority date | — |
| Expiry date | Feb 20, 2021 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10K11/346
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
A method and an apparatus for correcting refraction delay errors on curved probes for all ranges using cordic rotation. The angle &phgr; from the normal of an element to the focus is determined as a function of the angle of cordic rotation. Then a delay error correction is indexed using this angle &phgr;. The angular correction method is efficient in that it uses the inherent property of cordic rotation to calculate the only range-dependent variable required for the correction. Thus the additional hardware required to calculate the corrections is minimal, as the remaining correction variables are vector and range independent.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.