Processing of reflected signals
US4777630A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 21, 1985 |
| Grant date | Oct 11, 1988 |
| Priority date | — |
| Expiry date | Mar 21, 2005 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S15/96
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Signal processing circuitry is disclosed for processing the echo signals of echo sounders to extract the leading edge of bottom echo components of the echo signals and to provide a reading of the average area under successive leading edges. Second and later bottom echo processing is additionally disclosed. Processing is achieved with a sample and hold circuit comprising an integrator (34), a first switch (33) for switching the required echo signal portion to the integrator, storage means (C2) for storing integrated values to be displayed, and a second switch (35) for selectively coupling values from the integrator to the storage means.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.