Color sonar system for displaying echo signals from fish
US4686659A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 14, 1985 |
| Grant date | Aug 11, 1987 |
| Priority date | — |
| Expiry date | Jun 14, 2005 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S15/96
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
In a color sonar system especially suitable for displaying fish echo signals, high and low frequency echo image signals are displayed utilizing colors corresponding to the echo signal strength, when the signal strength differences between the simultaneously received high and low frequency echo image signals are within a preset level range, when the differences between the high and low frequency echo image signals are outside the preset level range, the selected high frequency or low frequency echo image signals are displayed utilizing colors indicative of the differences in signal strength between the corresponding high frequency and low frequency echo signals.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.