Ultrasonic pulse inversion harmonic separation with reduced motional effects
US6186950A · kind A · utility
40Cited by
5References
30Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 4, 1999 |
| Grant date | Feb 13, 2001 |
| Priority date | — |
| Expiry date | Nov 4, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S15/8993
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Pulse inversion harmonic separation is performed utilizing echoes from three or more pulses of alternating phase or polarity. Temporally different echoes of opposite phase or polarity are combined in pairs, which are in turn combined to form partial sums and a final sum in which fundamental frequency signal components are substantially eliminated. Preferably the signals are normalized to a common reference level. The inventive technique can be performed by a filter structure using weighting coefficients exhibiting a Gaussian variation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.