Doppler shift frequency measuring device, log speed meter and tidal current meter
US10175262B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | May 18, 2016 |
| Grant date | Jan 8, 2019 |
| Priority date | — |
| Expiry date | May 5, 2037 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S15/60
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A Doppler shift frequency measuring device is provided, which includes a plurality of transmitters respectively configured to transmit a transmission wave, a plurality of receivers provided corresponding to the transmitters, respectively, and configured to receive reception waves that are reflection waves caused by the transmission waves from the transmitters, respectively, and a reception signal processor configured to calculate Doppler shift frequencies of the reception waves by processing reception signals obtained based on the reception waves received by the receivers. The reception signal processor includes a reception circuit configured to generate a synthesized signal by synthesizing processing target signals of which center frequencies of main lobes of power spectra are different from each other, the processing target signals generated based on the reception waves, and a Doppler shift frequency calculating module configured to calculate the Doppler shift frequencies of the reception waves based on the synthesized signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.